#include <linux/intel-iommu.h>
#include <linux/cpufreq.h>
#include <linux/user-return-notifier.h>
+#include <linux/srcu.h>
+#include <linux/slab.h>
+#include <linux/perf_event.h>
#include <trace/events/kvm.h>
-#undef TRACE_INCLUDE_FILE
+
#define CREATE_TRACE_POINTS
#include "trace.h"
struct kvm_shared_msrs_global {
int nr;
- struct kvm_shared_msr {
- u32 msr;
- u64 value;
- } msrs[KVM_NR_SHARED_MSRS];
+ u32 msrs[KVM_NR_SHARED_MSRS];
};
struct kvm_shared_msrs {
struct user_return_notifier urn;
bool registered;
- u64 current_value[KVM_NR_SHARED_MSRS];
+ struct kvm_shared_msr_values {
+ u64 host;
+ u64 curr;
+ } values[KVM_NR_SHARED_MSRS];
};
static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
static void kvm_on_user_return(struct user_return_notifier *urn)
{
unsigned slot;
- struct kvm_shared_msr *global;
struct kvm_shared_msrs *locals
= container_of(urn, struct kvm_shared_msrs, urn);
+ struct kvm_shared_msr_values *values;
for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
- global = &shared_msrs_global.msrs[slot];
- if (global->value != locals->current_value[slot]) {
- wrmsrl(global->msr, global->value);
- locals->current_value[slot] = global->value;
+ values = &locals->values[slot];
+ if (values->host != values->curr) {
+ wrmsrl(shared_msrs_global.msrs[slot], values->host);
+ values->curr = values->host;
}
}
locals->registered = false;
user_return_notifier_unregister(urn);
}
-void kvm_define_shared_msr(unsigned slot, u32 msr)
+static void shared_msr_update(unsigned slot, u32 msr)
{
- int cpu;
+ struct kvm_shared_msrs *smsr;
u64 value;
+ smsr = &__get_cpu_var(shared_msrs);
+ /* only read, and nobody should modify it at this time,
+ * so don't need lock */
+ if (slot >= shared_msrs_global.nr) {
+ printk(KERN_ERR "kvm: invalid MSR slot!");
+ return;
+ }
+ rdmsrl_safe(msr, &value);
+ smsr->values[slot].host = value;
+ smsr->values[slot].curr = value;
+}
+
+void kvm_define_shared_msr(unsigned slot, u32 msr)
+{
if (slot >= shared_msrs_global.nr)
shared_msrs_global.nr = slot + 1;
- shared_msrs_global.msrs[slot].msr = msr;
- rdmsrl_safe(msr, &value);
- shared_msrs_global.msrs[slot].value = value;
- for_each_online_cpu(cpu)
- per_cpu(shared_msrs, cpu).current_value[slot] = value;
+ shared_msrs_global.msrs[slot] = msr;
+ /* we need ensured the shared_msr_global have been updated */
+ smp_wmb();
}
EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
static void kvm_shared_msr_cpu_online(void)
{
unsigned i;
- struct kvm_shared_msrs *locals = &__get_cpu_var(shared_msrs);
for (i = 0; i < shared_msrs_global.nr; ++i)
- locals->current_value[i] = shared_msrs_global.msrs[i].value;
+ shared_msr_update(i, shared_msrs_global.msrs[i]);
}
void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
{
struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
- if (((value ^ smsr->current_value[slot]) & mask) == 0)
+ if (((value ^ smsr->values[slot].curr) & mask) == 0)
return;
- smsr->current_value[slot] = value;
- wrmsrl(shared_msrs_global.msrs[slot].msr, value);
+ smsr->values[slot].curr = value;
+ wrmsrl(shared_msrs_global.msrs[slot], value);
if (!smsr->registered) {
smsr->urn.on_user_return = kvm_on_user_return;
user_return_notifier_register(&smsr->urn);
kvm_on_user_return(&smsr->urn);
}
-unsigned long segment_base(u16 selector)
-{
- struct descriptor_table gdt;
- struct desc_struct *d;
- unsigned long table_base;
- unsigned long v;
-
- if (selector == 0)
- return 0;
-
- kvm_get_gdt(&gdt);
- table_base = gdt.base;
-
- if (selector & 4) { /* from ldt */
- u16 ldt_selector = kvm_read_ldt();
-
- table_base = segment_base(ldt_selector);
- }
- d = (struct desc_struct *)(table_base + (selector & ~7));
- v = get_desc_base(d);
-#ifdef CONFIG_X86_64
- if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
- v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
-#endif
- return v;
-}
-EXPORT_SYMBOL_GPL(segment_base);
-
u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
{
if (irqchip_in_kernel(vcpu->kvm))
}
static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
- unsigned nr, bool has_error, u32 error_code)
+ unsigned nr, bool has_error, u32 error_code,
+ bool reinject)
{
u32 prev_nr;
int class1, class2;
vcpu->arch.exception.has_error_code = has_error;
vcpu->arch.exception.nr = nr;
vcpu->arch.exception.error_code = error_code;
+ vcpu->arch.exception.reinject = true;
return;
}
void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
{
- kvm_multiple_exception(vcpu, nr, false, 0);
+ kvm_multiple_exception(vcpu, nr, false, 0, false);
}
EXPORT_SYMBOL_GPL(kvm_queue_exception);
+void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
+{
+ kvm_multiple_exception(vcpu, nr, false, 0, true);
+}
+EXPORT_SYMBOL_GPL(kvm_requeue_exception);
+
void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
u32 error_code)
{
void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
{
- kvm_multiple_exception(vcpu, nr, true, error_code);
+ kvm_multiple_exception(vcpu, nr, true, error_code, false);
}
EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
+void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
+{
+ kvm_multiple_exception(vcpu, nr, true, error_code, true);
+}
+EXPORT_SYMBOL_GPL(kvm_requeue_exception_e);
+
/*
* Checks if cpl <= required_cpl; if true, return true. Otherwise queue
* a #GP and return false.
void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
- if (cr0 & CR0_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
- cr0, vcpu->arch.cr0);
+ cr0 |= X86_CR0_ET;
+
+#ifdef CONFIG_X86_64
+ if (cr0 & 0xffffffff00000000UL) {
kvm_inject_gp(vcpu, 0);
return;
}
+#endif
+
+ cr0 &= ~CR0_RESERVED_BITS;
if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
- printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
kvm_inject_gp(vcpu, 0);
return;
}
if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
- printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
- "and a clear PE flag\n");
kvm_inject_gp(vcpu, 0);
return;
}
if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
#ifdef CONFIG_X86_64
- if ((vcpu->arch.shadow_efer & EFER_LME)) {
+ if ((vcpu->arch.efer & EFER_LME)) {
int cs_db, cs_l;
if (!is_pae(vcpu)) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while PAE is disabled\n");
kvm_inject_gp(vcpu, 0);
return;
}
kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
if (cs_l) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while CS.L == 1\n");
kvm_inject_gp(vcpu, 0);
return;
} else
#endif
if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
- printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
- "reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
}
kvm_x86_ops->set_cr0(vcpu, cr0);
- vcpu->arch.cr0 = cr0;
kvm_mmu_reset_context(vcpu);
return;
void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
{
- kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f));
+ kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f));
}
EXPORT_SYMBOL_GPL(kvm_lmsw);
void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
- unsigned long old_cr4 = vcpu->arch.cr4;
+ unsigned long old_cr4 = kvm_read_cr4(vcpu);
unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
if (cr4 & CR4_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
if (is_long_mode(vcpu)) {
if (!(cr4 & X86_CR4_PAE)) {
- printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
- "in long mode\n");
kvm_inject_gp(vcpu, 0);
return;
}
} else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
&& ((cr4 ^ old_cr4) & pdptr_bits)
&& !load_pdptrs(vcpu, vcpu->arch.cr3)) {
- printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
if (cr4 & X86_CR4_VMXE) {
- printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
kvm_inject_gp(vcpu, 0);
return;
}
kvm_x86_ops->set_cr4(vcpu, cr4);
vcpu->arch.cr4 = cr4;
- vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled;
kvm_mmu_reset_context(vcpu);
}
EXPORT_SYMBOL_GPL(kvm_set_cr4);
if (is_long_mode(vcpu)) {
if (cr3 & CR3_L_MODE_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
} else {
if (is_pae(vcpu)) {
if (cr3 & CR3_PAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
- printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
- "reserved bits\n");
kvm_inject_gp(vcpu, 0);
return;
}
void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
{
if (cr8 & CR8_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
kvm_inject_gp(vcpu, 0);
return;
}
}
EXPORT_SYMBOL_GPL(kvm_get_cr8);
+int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
+{
+ switch (dr) {
+ case 0 ... 3:
+ vcpu->arch.db[dr] = val;
+ if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
+ vcpu->arch.eff_db[dr] = val;
+ break;
+ case 4:
+ if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+ }
+ /* fall through */
+ case 6:
+ if (val & 0xffffffff00000000ULL) {
+ kvm_inject_gp(vcpu, 0);
+ return 1;
+ }
+ vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
+ break;
+ case 5:
+ if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+ }
+ /* fall through */
+ default: /* 7 */
+ if (val & 0xffffffff00000000ULL) {
+ kvm_inject_gp(vcpu, 0);
+ return 1;
+ }
+ vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
+ if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
+ kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
+ vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
+ }
+ break;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_set_dr);
+
+int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
+{
+ switch (dr) {
+ case 0 ... 3:
+ *val = vcpu->arch.db[dr];
+ break;
+ case 4:
+ if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+ }
+ /* fall through */
+ case 6:
+ *val = vcpu->arch.dr6;
+ break;
+ case 5:
+ if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+ }
+ /* fall through */
+ default: /* 7 */
+ *val = vcpu->arch.dr7;
+ break;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_get_dr);
+
static inline u32 bit(int bitno)
{
return 1 << (bitno & 31);
* kvm-specific. Those are put in the beginning of the list.
*/
-#define KVM_SAVE_MSRS_BEGIN 2
+#define KVM_SAVE_MSRS_BEGIN 5
static u32 msrs_to_save[] = {
MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
+ HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
+ HV_X64_MSR_APIC_ASSIST_PAGE,
MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
MSR_K6_STAR,
#ifdef CONFIG_X86_64
static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
if (efer & efer_reserved_bits) {
- printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
- efer);
kvm_inject_gp(vcpu, 0);
return;
}
if (is_paging(vcpu)
- && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
- printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
+ && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) {
kvm_inject_gp(vcpu, 0);
return;
}
feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) {
- printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n");
kvm_inject_gp(vcpu, 0);
return;
}
feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) {
- printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n");
kvm_inject_gp(vcpu, 0);
return;
}
kvm_x86_ops->set_efer(vcpu, efer);
efer &= ~EFER_LMA;
- efer |= vcpu->arch.shadow_efer & EFER_LMA;
+ efer |= vcpu->arch.efer & EFER_LMA;
- vcpu->arch.shadow_efer = efer;
+ vcpu->arch.efer = efer;
vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
kvm_mmu_reset_context(vcpu);
if (msr >= MSR_IA32_MC0_CTL &&
msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
u32 offset = msr - MSR_IA32_MC0_CTL;
- /* only 0 or all 1s can be written to IA32_MCi_CTL */
+ /* only 0 or all 1s can be written to IA32_MCi_CTL
+ * some Linux kernels though clear bit 10 in bank 4 to
+ * workaround a BIOS/GART TBL issue on AMD K8s, ignore
+ * this to avoid an uncatched #GP in the guest
+ */
if ((offset & 0x3) == 0 &&
- data != 0 && data != ~(u64)0)
+ data != 0 && (data | (1 << 10)) != ~(u64)0)
return -1;
vcpu->arch.mce_banks[offset] = data;
break;
return r;
}
+static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
+{
+ return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
+}
+
+static bool kvm_hv_msr_partition_wide(u32 msr)
+{
+ bool r = false;
+ switch (msr) {
+ case HV_X64_MSR_GUEST_OS_ID:
+ case HV_X64_MSR_HYPERCALL:
+ r = true;
+ break;
+ }
+
+ return r;
+}
+
+static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+ struct kvm *kvm = vcpu->kvm;
+
+ switch (msr) {
+ case HV_X64_MSR_GUEST_OS_ID:
+ kvm->arch.hv_guest_os_id = data;
+ /* setting guest os id to zero disables hypercall page */
+ if (!kvm->arch.hv_guest_os_id)
+ kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
+ break;
+ case HV_X64_MSR_HYPERCALL: {
+ u64 gfn;
+ unsigned long addr;
+ u8 instructions[4];
+
+ /* if guest os id is not set hypercall should remain disabled */
+ if (!kvm->arch.hv_guest_os_id)
+ break;
+ if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
+ kvm->arch.hv_hypercall = data;
+ break;
+ }
+ gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return 1;
+ kvm_x86_ops->patch_hypercall(vcpu, instructions);
+ ((unsigned char *)instructions)[3] = 0xc3; /* ret */
+ if (copy_to_user((void __user *)addr, instructions, 4))
+ return 1;
+ kvm->arch.hv_hypercall = data;
+ break;
+ }
+ default:
+ pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
+ "data 0x%llx\n", msr, data);
+ return 1;
+ }
+ return 0;
+}
+
+static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+ switch (msr) {
+ case HV_X64_MSR_APIC_ASSIST_PAGE: {
+ unsigned long addr;
+
+ if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
+ vcpu->arch.hv_vapic = data;
+ break;
+ }
+ addr = gfn_to_hva(vcpu->kvm, data >>
+ HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
+ if (kvm_is_error_hva(addr))
+ return 1;
+ if (clear_user((void __user *)addr, PAGE_SIZE))
+ return 1;
+ vcpu->arch.hv_vapic = data;
+ break;
+ }
+ case HV_X64_MSR_EOI:
+ return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
+ case HV_X64_MSR_ICR:
+ return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
+ case HV_X64_MSR_TPR:
+ return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
+ default:
+ pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
+ "data 0x%llx\n", msr, data);
+ return 1;
+ }
+
+ return 0;
+}
+
int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
{
switch (msr) {
break;
case MSR_K7_HWCR:
data &= ~(u64)0x40; /* ignore flush filter disable */
+ data &= ~(u64)0x100; /* ignore ignne emulation enable */
if (data != 0) {
pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
data);
pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
"0x%x data 0x%llx\n", msr, data);
break;
+ case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
+ if (kvm_hv_msr_partition_wide(msr)) {
+ int r;
+ mutex_lock(&vcpu->kvm->lock);
+ r = set_msr_hyperv_pw(vcpu, msr, data);
+ mutex_unlock(&vcpu->kvm->lock);
+ return r;
+ } else
+ return set_msr_hyperv(vcpu, msr, data);
+ break;
default:
if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
return xen_hvm_config(vcpu, data);
return 0;
}
+static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+ u64 data = 0;
+ struct kvm *kvm = vcpu->kvm;
+
+ switch (msr) {
+ case HV_X64_MSR_GUEST_OS_ID:
+ data = kvm->arch.hv_guest_os_id;
+ break;
+ case HV_X64_MSR_HYPERCALL:
+ data = kvm->arch.hv_hypercall;
+ break;
+ default:
+ pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
+ return 1;
+ }
+
+ *pdata = data;
+ return 0;
+}
+
+static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+ u64 data = 0;
+
+ switch (msr) {
+ case HV_X64_MSR_VP_INDEX: {
+ int r;
+ struct kvm_vcpu *v;
+ kvm_for_each_vcpu(r, v, vcpu->kvm)
+ if (v == vcpu)
+ data = r;
+ break;
+ }
+ case HV_X64_MSR_EOI:
+ return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
+ case HV_X64_MSR_ICR:
+ return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
+ case HV_X64_MSR_TPR:
+ return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
+ default:
+ pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
+ return 1;
+ }
+ *pdata = data;
+ return 0;
+}
+
int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
{
u64 data;
data |= (((uint64_t)4ULL) << 40);
break;
case MSR_EFER:
- data = vcpu->arch.shadow_efer;
+ data = vcpu->arch.efer;
break;
case MSR_KVM_WALL_CLOCK:
data = vcpu->kvm->arch.wall_clock;
case MSR_IA32_MCG_STATUS:
case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
return get_msr_mce(vcpu, msr, pdata);
+ case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
+ if (kvm_hv_msr_partition_wide(msr)) {
+ int r;
+ mutex_lock(&vcpu->kvm->lock);
+ r = get_msr_hyperv_pw(vcpu, msr, pdata);
+ mutex_unlock(&vcpu->kvm->lock);
+ return r;
+ } else
+ return get_msr_hyperv(vcpu, msr, pdata);
+ break;
default:
if (!ignore_msrs) {
pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
int (*do_msr)(struct kvm_vcpu *vcpu,
unsigned index, u64 *data))
{
- int i;
+ int i, idx;
vcpu_load(vcpu);
- down_read(&vcpu->kvm->slots_lock);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
for (i = 0; i < msrs->nmsrs; ++i)
if (do_msr(vcpu, entries[i].index, &entries[i].data))
break;
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
vcpu_put(vcpu);
case KVM_CAP_XEN_HVM:
case KVM_CAP_ADJUST_CLOCK:
case KVM_CAP_VCPU_EVENTS:
+ case KVM_CAP_HYPERV:
+ case KVM_CAP_HYPERV_VAPIC:
+ case KVM_CAP_HYPERV_SPIN:
+ case KVM_CAP_PCI_SEGMENT:
+ case KVM_CAP_DEBUGREGS:
+ case KVM_CAP_X86_ROBUST_SINGLESTEP:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
- kvm_x86_ops->vcpu_put(vcpu);
kvm_put_guest_fpu(vcpu);
+ kvm_x86_ops->vcpu_put(vcpu);
}
static int is_efer_nx(void)
cpuid_fix_nx_cap(vcpu);
r = 0;
kvm_apic_set_version(vcpu);
+ kvm_x86_ops->cpuid_update(vcpu);
out_free:
vfree(cpuid_entries);
goto out;
vcpu->arch.cpuid_nent = cpuid->nent;
kvm_apic_set_version(vcpu);
+ kvm_x86_ops->cpuid_update(vcpu);
return 0;
out:
u32 index, int *nent, int maxnent)
{
unsigned f_nx = is_efer_nx() ? F(NX) : 0;
- unsigned f_gbpages = kvm_x86_ops->gb_page_enable() ? F(GBPAGES) : 0;
#ifdef CONFIG_X86_64
+ unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
+ ? F(GBPAGES) : 0;
unsigned f_lm = F(LM);
#else
+ unsigned f_gbpages = 0;
unsigned f_lm = 0;
#endif
+ unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
/* cpuid 1.edx */
const u32 kvm_supported_word0_x86_features =
F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
F(PAT) | F(PSE36) | 0 /* Reserved */ |
f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
- F(FXSR) | F(FXSR_OPT) | f_gbpages | 0 /* RDTSCP */ |
+ F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
/* cpuid 1.ecx */
const u32 kvm_supported_word4_x86_features =
entry->ecx &= kvm_supported_word6_x86_features;
break;
}
+
+ kvm_x86_ops->set_supported_cpuid(function, entry);
+
put_cpu();
}
return 0;
if (mce->status & MCI_STATUS_UC) {
if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
- !(vcpu->arch.cr4 & X86_CR4_MCE)) {
+ !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
printk(KERN_DEBUG "kvm: set_mce: "
"injects mce exception while "
"previous one is in progress!\n");
{
vcpu_load(vcpu);
- events->exception.injected = vcpu->arch.exception.pending;
+ events->exception.injected =
+ vcpu->arch.exception.pending &&
+ !kvm_exception_is_soft(vcpu->arch.exception.nr);
events->exception.nr = vcpu->arch.exception.nr;
events->exception.has_error_code = vcpu->arch.exception.has_error_code;
events->exception.error_code = vcpu->arch.exception.error_code;
- events->interrupt.injected = vcpu->arch.interrupt.pending;
+ events->interrupt.injected =
+ vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
events->interrupt.nr = vcpu->arch.interrupt.nr;
- events->interrupt.soft = vcpu->arch.interrupt.soft;
+ events->interrupt.soft = 0;
+ events->interrupt.shadow =
+ kvm_x86_ops->get_interrupt_shadow(vcpu,
+ KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
events->nmi.injected = vcpu->arch.nmi_injected;
events->nmi.pending = vcpu->arch.nmi_pending;
events->sipi_vector = vcpu->arch.sipi_vector;
events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
- | KVM_VCPUEVENT_VALID_SIPI_VECTOR);
+ | KVM_VCPUEVENT_VALID_SIPI_VECTOR
+ | KVM_VCPUEVENT_VALID_SHADOW);
vcpu_put(vcpu);
}
struct kvm_vcpu_events *events)
{
if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
- | KVM_VCPUEVENT_VALID_SIPI_VECTOR))
+ | KVM_VCPUEVENT_VALID_SIPI_VECTOR
+ | KVM_VCPUEVENT_VALID_SHADOW))
return -EINVAL;
vcpu_load(vcpu);
vcpu->arch.interrupt.soft = events->interrupt.soft;
if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm))
kvm_pic_clear_isr_ack(vcpu->kvm);
+ if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
+ kvm_x86_ops->set_interrupt_shadow(vcpu,
+ events->interrupt.shadow);
vcpu->arch.nmi_injected = events->nmi.injected;
if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
return 0;
}
+static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
+ struct kvm_debugregs *dbgregs)
+{
+ vcpu_load(vcpu);
+
+ memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
+ dbgregs->dr6 = vcpu->arch.dr6;
+ dbgregs->dr7 = vcpu->arch.dr7;
+ dbgregs->flags = 0;
+
+ vcpu_put(vcpu);
+}
+
+static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
+ struct kvm_debugregs *dbgregs)
+{
+ if (dbgregs->flags)
+ return -EINVAL;
+
+ vcpu_load(vcpu);
+
+ memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
+ vcpu->arch.dr6 = dbgregs->dr6;
+ vcpu->arch.dr7 = dbgregs->dr7;
+
+ vcpu_put(vcpu);
+
+ return 0;
+}
+
long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
break;
}
+ case KVM_GET_DEBUGREGS: {
+ struct kvm_debugregs dbgregs;
+
+ kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
+
+ r = -EFAULT;
+ if (copy_to_user(argp, &dbgregs,
+ sizeof(struct kvm_debugregs)))
+ break;
+ r = 0;
+ break;
+ }
+ case KVM_SET_DEBUGREGS: {
+ struct kvm_debugregs dbgregs;
+
+ r = -EFAULT;
+ if (copy_from_user(&dbgregs, argp,
+ sizeof(struct kvm_debugregs)))
+ break;
+
+ r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
+ break;
+ }
default:
r = -EINVAL;
}
if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
return -EINVAL;
- down_write(&kvm->slots_lock);
+ mutex_lock(&kvm->slots_lock);
spin_lock(&kvm->mmu_lock);
kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
spin_unlock(&kvm->mmu_lock);
- up_write(&kvm->slots_lock);
+ mutex_unlock(&kvm->slots_lock);
return 0;
}
return kvm->arch.n_alloc_mmu_pages;
}
+gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn)
+{
+ int i;
+ struct kvm_mem_alias *alias;
+ struct kvm_mem_aliases *aliases;
+
+ aliases = kvm_aliases(kvm);
+
+ for (i = 0; i < aliases->naliases; ++i) {
+ alias = &aliases->aliases[i];
+ if (alias->flags & KVM_ALIAS_INVALID)
+ continue;
+ if (gfn >= alias->base_gfn
+ && gfn < alias->base_gfn + alias->npages)
+ return alias->target_gfn + gfn - alias->base_gfn;
+ }
+ return gfn;
+}
+
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
struct kvm_mem_alias *alias;
+ struct kvm_mem_aliases *aliases;
+
+ aliases = kvm_aliases(kvm);
- for (i = 0; i < kvm->arch.naliases; ++i) {
- alias = &kvm->arch.aliases[i];
+ for (i = 0; i < aliases->naliases; ++i) {
+ alias = &aliases->aliases[i];
if (gfn >= alias->base_gfn
&& gfn < alias->base_gfn + alias->npages)
return alias->target_gfn + gfn - alias->base_gfn;
{
int r, n;
struct kvm_mem_alias *p;
+ struct kvm_mem_aliases *aliases, *old_aliases;
r = -EINVAL;
/* General sanity checks */
< alias->target_phys_addr)
goto out;
- down_write(&kvm->slots_lock);
- spin_lock(&kvm->mmu_lock);
+ r = -ENOMEM;
+ aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
+ if (!aliases)
+ goto out;
+
+ mutex_lock(&kvm->slots_lock);
+
+ /* invalidate any gfn reference in case of deletion/shrinking */
+ memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
+ aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID;
+ old_aliases = kvm->arch.aliases;
+ rcu_assign_pointer(kvm->arch.aliases, aliases);
+ synchronize_srcu_expedited(&kvm->srcu);
+ kvm_mmu_zap_all(kvm);
+ kfree(old_aliases);
+
+ r = -ENOMEM;
+ aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
+ if (!aliases)
+ goto out_unlock;
- p = &kvm->arch.aliases[alias->slot];
+ memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
+
+ p = &aliases->aliases[alias->slot];
p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
p->npages = alias->memory_size >> PAGE_SHIFT;
p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
+ p->flags &= ~(KVM_ALIAS_INVALID);
for (n = KVM_ALIAS_SLOTS; n > 0; --n)
- if (kvm->arch.aliases[n - 1].npages)
+ if (aliases->aliases[n - 1].npages)
break;
- kvm->arch.naliases = n;
-
- spin_unlock(&kvm->mmu_lock);
- kvm_mmu_zap_all(kvm);
+ aliases->naliases = n;
- up_write(&kvm->slots_lock);
-
- return 0;
+ old_aliases = kvm->arch.aliases;
+ rcu_assign_pointer(kvm->arch.aliases, aliases);
+ synchronize_srcu_expedited(&kvm->srcu);
+ kfree(old_aliases);
+ r = 0;
+out_unlock:
+ mutex_unlock(&kvm->slots_lock);
out:
return r;
}
r = 0;
switch (chip->chip_id) {
case KVM_IRQCHIP_PIC_MASTER:
- spin_lock(&pic_irqchip(kvm)->lock);
+ raw_spin_lock(&pic_irqchip(kvm)->lock);
memcpy(&pic_irqchip(kvm)->pics[0],
&chip->chip.pic,
sizeof(struct kvm_pic_state));
- spin_unlock(&pic_irqchip(kvm)->lock);
+ raw_spin_unlock(&pic_irqchip(kvm)->lock);
break;
case KVM_IRQCHIP_PIC_SLAVE:
- spin_lock(&pic_irqchip(kvm)->lock);
+ raw_spin_lock(&pic_irqchip(kvm)->lock);
memcpy(&pic_irqchip(kvm)->pics[1],
&chip->chip.pic,
sizeof(struct kvm_pic_state));
- spin_unlock(&pic_irqchip(kvm)->lock);
+ raw_spin_unlock(&pic_irqchip(kvm)->lock);
break;
case KVM_IRQCHIP_IOAPIC:
r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log)
{
- int r;
- int n;
+ int r, i;
struct kvm_memory_slot *memslot;
- int is_dirty = 0;
+ unsigned long n;
+ unsigned long is_dirty = 0;
+ unsigned long *dirty_bitmap = NULL;
- down_write(&kvm->slots_lock);
+ mutex_lock(&kvm->slots_lock);
- r = kvm_get_dirty_log(kvm, log, &is_dirty);
- if (r)
+ r = -EINVAL;
+ if (log->slot >= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot = &kvm->memslots->memslots[log->slot];
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+
+ r = -ENOMEM;
+ dirty_bitmap = vmalloc(n);
+ if (!dirty_bitmap)
goto out;
+ memset(dirty_bitmap, 0, n);
+
+ for (i = 0; !is_dirty && i < n/sizeof(long); i++)
+ is_dirty = memslot->dirty_bitmap[i];
/* If nothing is dirty, don't bother messing with page tables. */
if (is_dirty) {
+ struct kvm_memslots *slots, *old_slots;
+
spin_lock(&kvm->mmu_lock);
kvm_mmu_slot_remove_write_access(kvm, log->slot);
spin_unlock(&kvm->mmu_lock);
- memslot = &kvm->memslots[log->slot];
- n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
- memset(memslot->dirty_bitmap, 0, n);
+
+ slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ if (!slots)
+ goto out_free;
+
+ memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
+ slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
+
+ old_slots = kvm->memslots;
+ rcu_assign_pointer(kvm->memslots, slots);
+ synchronize_srcu_expedited(&kvm->srcu);
+ dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
+ kfree(old_slots);
}
+
r = 0;
+ if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
+ r = -EFAULT;
+out_free:
+ vfree(dirty_bitmap);
out:
- up_write(&kvm->slots_lock);
+ mutex_unlock(&kvm->slots_lock);
return r;
}
if (vpic) {
r = kvm_ioapic_init(kvm);
if (r) {
+ kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
+ &vpic->dev);
kfree(vpic);
goto create_irqchip_unlock;
}
r = kvm_setup_default_irq_routing(kvm);
if (r) {
mutex_lock(&kvm->irq_lock);
- kfree(kvm->arch.vpic);
- kfree(kvm->arch.vioapic);
- kvm->arch.vpic = NULL;
- kvm->arch.vioapic = NULL;
+ kvm_ioapic_destroy(kvm);
+ kvm_destroy_pic(kvm);
mutex_unlock(&kvm->irq_lock);
}
create_irqchip_unlock:
sizeof(struct kvm_pit_config)))
goto out;
create_pit:
- down_write(&kvm->slots_lock);
+ mutex_lock(&kvm->slots_lock);
r = -EEXIST;
if (kvm->arch.vpit)
goto create_pit_unlock;
if (kvm->arch.vpit)
r = 0;
create_pit_unlock:
- up_write(&kvm->slots_lock);
+ mutex_unlock(&kvm->slots_lock);
break;
case KVM_IRQ_LINE_STATUS:
case KVM_IRQ_LINE: {
r = -EFAULT;
if (copy_from_user(&irq_event, argp, sizeof irq_event))
goto out;
+ r = -ENXIO;
if (irqchip_in_kernel(kvm)) {
__s32 status;
status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
irq_event.irq, irq_event.level);
if (ioctl == KVM_IRQ_LINE_STATUS) {
+ r = -EFAULT;
irq_event.status = status;
if (copy_to_user(argp, &irq_event,
sizeof irq_event))
!kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v))
return 0;
- return kvm_io_bus_write(&vcpu->kvm->mmio_bus, addr, len, v);
+ return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
}
static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
!kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v))
return 0;
- return kvm_io_bus_read(&vcpu->kvm->mmio_bus, addr, len, v);
+ return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
}
-static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
- struct kvm_vcpu *vcpu)
+static void kvm_set_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
{
- void *data = val;
- int r = X86EMUL_CONTINUE;
+ kvm_x86_ops->set_segment(vcpu, var, seg);
+}
- while (bytes) {
- gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
- unsigned offset = addr & (PAGE_SIZE-1);
- unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
- int ret;
+void kvm_get_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
+{
+ kvm_x86_ops->get_segment(vcpu, var, seg);
+}
- if (gpa == UNMAPPED_GVA) {
- r = X86EMUL_PROPAGATE_FAULT;
- goto out;
- }
- ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
- if (ret < 0) {
+gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+{
+ u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
+}
+
+ gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+{
+ u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ access |= PFERR_FETCH_MASK;
+ return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
+}
+
+gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+{
+ u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ access |= PFERR_WRITE_MASK;
+ return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
+}
+
+/* uses this to access any guest's mapped memory without checking CPL */
+gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
+{
+ return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error);
+}
+
+static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
+ struct kvm_vcpu *vcpu, u32 access,
+ u32 *error)
+{
+ void *data = val;
+ int r = X86EMUL_CONTINUE;
+
+ while (bytes) {
+ gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error);
+ unsigned offset = addr & (PAGE_SIZE-1);
+ unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
+ int ret;
+
+ if (gpa == UNMAPPED_GVA) {
+ r = X86EMUL_PROPAGATE_FAULT;
+ goto out;
+ }
+ ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
+ if (ret < 0) {
r = X86EMUL_UNHANDLEABLE;
goto out;
}
return r;
}
-static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes,
- struct kvm_vcpu *vcpu)
+/* used for instruction fetching */
+static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
+ struct kvm_vcpu *vcpu, u32 *error)
+{
+ u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
+ access | PFERR_FETCH_MASK, error);
+}
+
+static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
+ struct kvm_vcpu *vcpu, u32 *error)
+{
+ u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
+ error);
+}
+
+static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
+ struct kvm_vcpu *vcpu, u32 *error)
+{
+ return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
+}
+
+static int kvm_write_guest_virt_system(gva_t addr, void *val,
+ unsigned int bytes,
+ struct kvm_vcpu *vcpu,
+ u32 *error)
{
void *data = val;
int r = X86EMUL_CONTINUE;
while (bytes) {
- gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
+ gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr,
+ PFERR_WRITE_MASK, error);
unsigned offset = addr & (PAGE_SIZE-1);
unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
int ret;
return r;
}
-
static int emulator_read_emulated(unsigned long addr,
void *val,
unsigned int bytes,
struct kvm_vcpu *vcpu)
{
gpa_t gpa;
+ u32 error_code;
if (vcpu->mmio_read_completed) {
memcpy(val, vcpu->mmio_data, bytes);
return X86EMUL_CONTINUE;
}
- gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
+ gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code);
+
+ if (gpa == UNMAPPED_GVA) {
+ kvm_inject_page_fault(vcpu, addr, error_code);
+ return X86EMUL_PROPAGATE_FAULT;
+ }
/* For APIC access vmexit */
if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
goto mmio;
- if (kvm_read_guest_virt(addr, val, bytes, vcpu)
+ if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
== X86EMUL_CONTINUE)
return X86EMUL_CONTINUE;
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
mmio:
/*
struct kvm_vcpu *vcpu)
{
gpa_t gpa;
+ u32 error_code;
- gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
+ gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code);
if (gpa == UNMAPPED_GVA) {
- kvm_inject_page_fault(vcpu, addr, 2);
+ kvm_inject_page_fault(vcpu, addr, error_code);
return X86EMUL_PROPAGATE_FAULT;
}
}
int emulator_write_emulated(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+ const void *val,
+ unsigned int bytes,
+ struct kvm_vcpu *vcpu)
{
/* Crossing a page boundary? */
if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
}
EXPORT_SYMBOL_GPL(emulator_write_emulated);
+#define CMPXCHG_TYPE(t, ptr, old, new) \
+ (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
+
+#ifdef CONFIG_X86_64
+# define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
+#else
+# define CMPXCHG64(ptr, old, new) \
+ (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
+#endif
+
static int emulator_cmpxchg_emulated(unsigned long addr,
const void *old,
const void *new,
unsigned int bytes,
struct kvm_vcpu *vcpu)
{
- printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
-#ifndef CONFIG_X86_64
- /* guests cmpxchg8b have to be emulated atomically */
- if (bytes == 8) {
- gpa_t gpa;
- struct page *page;
- char *kaddr;
- u64 val;
+ gpa_t gpa;
+ struct page *page;
+ char *kaddr;
+ bool exchanged;
- gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
+ /* guests cmpxchg8b have to be emulated atomically */
+ if (bytes > 8 || (bytes & (bytes - 1)))
+ goto emul_write;
- if (gpa == UNMAPPED_GVA ||
- (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
- goto emul_write;
+ gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
- if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
- goto emul_write;
+ if (gpa == UNMAPPED_GVA ||
+ (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
+ goto emul_write;
- val = *(u64 *)new;
+ if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
+ goto emul_write;
- page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
+ page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
- kaddr = kmap_atomic(page, KM_USER0);
- set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val);
- kunmap_atomic(kaddr, KM_USER0);
- kvm_release_page_dirty(page);
+ kaddr = kmap_atomic(page, KM_USER0);
+ kaddr += offset_in_page(gpa);
+ switch (bytes) {
+ case 1:
+ exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
+ break;
+ case 2:
+ exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
+ break;
+ case 4:
+ exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
+ break;
+ case 8:
+ exchanged = CMPXCHG64(kaddr, old, new);
+ break;
+ default:
+ BUG();
}
+ kunmap_atomic(kaddr, KM_USER0);
+ kvm_release_page_dirty(page);
+
+ if (!exchanged)
+ return X86EMUL_CMPXCHG_FAILED;
+
+ kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1);
+
+ return X86EMUL_CONTINUE;
+
emul_write:
-#endif
+ printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
return emulator_write_emulated(addr, new, bytes, vcpu);
}
+static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
+{
+ /* TODO: String I/O for in kernel device */
+ int r;
+
+ if (vcpu->arch.pio.in)
+ r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
+ vcpu->arch.pio.size, pd);
+ else
+ r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
+ vcpu->arch.pio.port, vcpu->arch.pio.size,
+ pd);
+ return r;
+}
+
+
+static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
+ unsigned int count, struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.pio.count)
+ goto data_avail;
+
+ trace_kvm_pio(1, port, size, 1);
+
+ vcpu->arch.pio.port = port;
+ vcpu->arch.pio.in = 1;
+ vcpu->arch.pio.count = count;
+ vcpu->arch.pio.size = size;
+
+ if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
+ data_avail:
+ memcpy(val, vcpu->arch.pio_data, size * count);
+ vcpu->arch.pio.count = 0;
+ return 1;
+ }
+
+ vcpu->run->exit_reason = KVM_EXIT_IO;
+ vcpu->run->io.direction = KVM_EXIT_IO_IN;
+ vcpu->run->io.size = size;
+ vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
+ vcpu->run->io.count = count;
+ vcpu->run->io.port = port;
+
+ return 0;
+}
+
+static int emulator_pio_out_emulated(int size, unsigned short port,
+ const void *val, unsigned int count,
+ struct kvm_vcpu *vcpu)
+{
+ trace_kvm_pio(0, port, size, 1);
+
+ vcpu->arch.pio.port = port;
+ vcpu->arch.pio.in = 0;
+ vcpu->arch.pio.count = count;
+ vcpu->arch.pio.size = size;
+
+ memcpy(vcpu->arch.pio_data, val, size * count);
+
+ if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
+ vcpu->arch.pio.count = 0;
+ return 1;
+ }
+
+ vcpu->run->exit_reason = KVM_EXIT_IO;
+ vcpu->run->io.direction = KVM_EXIT_IO_OUT;
+ vcpu->run->io.size = size;
+ vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
+ vcpu->run->io.count = count;
+ vcpu->run->io.port = port;
+
+ return 0;
+}
+
static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
{
return kvm_x86_ops->get_segment_base(vcpu, seg);
int emulate_clts(struct kvm_vcpu *vcpu)
{
- kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS);
+ kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
+ kvm_x86_ops->fpu_activate(vcpu);
return X86EMUL_CONTINUE;
}
int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
{
- struct kvm_vcpu *vcpu = ctxt->vcpu;
-
- switch (dr) {
- case 0 ... 3:
- *dest = kvm_x86_ops->get_dr(vcpu, dr);
- return X86EMUL_CONTINUE;
- default:
- pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr);
- return X86EMUL_UNHANDLEABLE;
- }
+ return kvm_get_dr(ctxt->vcpu, dr, dest);
}
int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
{
unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
- int exception;
- kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
- if (exception) {
- /* FIXME: better handling */
- return X86EMUL_UNHANDLEABLE;
- }
- return X86EMUL_CONTINUE;
+ return kvm_set_dr(ctxt->vcpu, dr, value & mask);
}
void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
- kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu);
+ kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL);
printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
}
EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
+static u64 mk_cr_64(u64 curr_cr, u32 new_val)
+{
+ return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
+}
+
+static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu)
+{
+ unsigned long value;
+
+ switch (cr) {
+ case 0:
+ value = kvm_read_cr0(vcpu);
+ break;
+ case 2:
+ value = vcpu->arch.cr2;
+ break;
+ case 3:
+ value = vcpu->arch.cr3;
+ break;
+ case 4:
+ value = kvm_read_cr4(vcpu);
+ break;
+ case 8:
+ value = kvm_get_cr8(vcpu);
+ break;
+ default:
+ vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
+ return 0;
+ }
+
+ return value;
+}
+
+static void emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
+{
+ switch (cr) {
+ case 0:
+ kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
+ break;
+ case 2:
+ vcpu->arch.cr2 = val;
+ break;
+ case 3:
+ kvm_set_cr3(vcpu, val);
+ break;
+ case 4:
+ kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
+ break;
+ case 8:
+ kvm_set_cr8(vcpu, val & 0xfUL);
+ break;
+ default:
+ vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
+ }
+}
+
+static int emulator_get_cpl(struct kvm_vcpu *vcpu)
+{
+ return kvm_x86_ops->get_cpl(vcpu);
+}
+
+static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu)
+{
+ kvm_x86_ops->get_gdt(vcpu, dt);
+}
+
+static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg,
+ struct kvm_vcpu *vcpu)
+{
+ struct kvm_segment var;
+
+ kvm_get_segment(vcpu, &var, seg);
+
+ if (var.unusable)
+ return false;
+
+ if (var.g)
+ var.limit >>= 12;
+ set_desc_limit(desc, var.limit);
+ set_desc_base(desc, (unsigned long)var.base);
+ desc->type = var.type;
+ desc->s = var.s;
+ desc->dpl = var.dpl;
+ desc->p = var.present;
+ desc->avl = var.avl;
+ desc->l = var.l;
+ desc->d = var.db;
+ desc->g = var.g;
+
+ return true;
+}
+
+static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg,
+ struct kvm_vcpu *vcpu)
+{
+ struct kvm_segment var;
+
+ /* needed to preserve selector */
+ kvm_get_segment(vcpu, &var, seg);
+
+ var.base = get_desc_base(desc);
+ var.limit = get_desc_limit(desc);
+ if (desc->g)
+ var.limit = (var.limit << 12) | 0xfff;
+ var.type = desc->type;
+ var.present = desc->p;
+ var.dpl = desc->dpl;
+ var.db = desc->d;
+ var.s = desc->s;
+ var.l = desc->l;
+ var.g = desc->g;
+ var.avl = desc->avl;
+ var.present = desc->p;
+ var.unusable = !var.present;
+ var.padding = 0;
+
+ kvm_set_segment(vcpu, &var, seg);
+ return;
+}
+
+static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu)
+{
+ struct kvm_segment kvm_seg;
+
+ kvm_get_segment(vcpu, &kvm_seg, seg);
+ return kvm_seg.selector;
+}
+
+static void emulator_set_segment_selector(u16 sel, int seg,
+ struct kvm_vcpu *vcpu)
+{
+ struct kvm_segment kvm_seg;
+
+ kvm_get_segment(vcpu, &kvm_seg, seg);
+ kvm_seg.selector = sel;
+ kvm_set_segment(vcpu, &kvm_seg, seg);
+}
+
+static void emulator_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
+{
+ kvm_x86_ops->set_rflags(vcpu, rflags);
+}
+
static struct x86_emulate_ops emulate_ops = {
- .read_std = kvm_read_guest_virt,
+ .read_std = kvm_read_guest_virt_system,
+ .write_std = kvm_write_guest_virt_system,
+ .fetch = kvm_fetch_guest_virt,
.read_emulated = emulator_read_emulated,
.write_emulated = emulator_write_emulated,
.cmpxchg_emulated = emulator_cmpxchg_emulated,
+ .pio_in_emulated = emulator_pio_in_emulated,
+ .pio_out_emulated = emulator_pio_out_emulated,
+ .get_cached_descriptor = emulator_get_cached_descriptor,
+ .set_cached_descriptor = emulator_set_cached_descriptor,
+ .get_segment_selector = emulator_get_segment_selector,
+ .set_segment_selector = emulator_set_segment_selector,
+ .get_gdt = emulator_get_gdt,
+ .get_cr = emulator_get_cr,
+ .set_cr = emulator_set_cr,
+ .cpl = emulator_get_cpl,
+ .set_rflags = emulator_set_rflags,
};
static void cache_all_regs(struct kvm_vcpu *vcpu)
cache_all_regs(vcpu);
vcpu->mmio_is_write = 0;
- vcpu->arch.pio.string = 0;
if (!(emulation_type & EMULTYPE_NO_DECODE)) {
int cs_db, cs_l;
kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
vcpu->arch.emulate_ctxt.vcpu = vcpu;
- vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu);
+ vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
+ vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
vcpu->arch.emulate_ctxt.mode =
+ (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
(vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
- ? X86EMUL_MODE_REAL : cs_l
+ ? X86EMUL_MODE_VM86 : cs_l
? X86EMUL_MODE_PROT64 : cs_db
? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
+ trace_kvm_emulate_insn_start(vcpu);
/* Only allow emulation of specific instructions on #UD
* (namely VMMCALL, sysenter, sysexit, syscall)*/
++vcpu->stat.insn_emulation;
if (r) {
++vcpu->stat.insn_emulation_fail;
+ trace_kvm_emulate_insn_failed(vcpu);
if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
return EMULATE_DONE;
return EMULATE_FAIL;
return EMULATE_DONE;
}
+restart:
r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
if (r == 0)
kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
- if (vcpu->arch.pio.string)
+ if (vcpu->arch.pio.count) {
+ if (!vcpu->arch.pio.in)
+ vcpu->arch.pio.count = 0;
return EMULATE_DO_MMIO;
+ }
- if ((r || vcpu->mmio_is_write) && run) {
+ if (r || vcpu->mmio_is_write) {
run->exit_reason = KVM_EXIT_MMIO;
run->mmio.phys_addr = vcpu->mmio_phys_addr;
memcpy(run->mmio.data, vcpu->mmio_data, 8);
if (r) {
if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
- return EMULATE_DONE;
+ goto done;
if (!vcpu->mmio_needed) {
+ ++vcpu->stat.insn_emulation_fail;
+ trace_kvm_emulate_insn_failed(vcpu);
kvm_report_emulation_failure(vcpu, "mmio");
return EMULATE_FAIL;
}
return EMULATE_DO_MMIO;
}
- kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
-
if (vcpu->mmio_is_write) {
vcpu->mmio_needed = 0;
return EMULATE_DO_MMIO;
}
- return EMULATE_DONE;
-}
-EXPORT_SYMBOL_GPL(emulate_instruction);
-
-static int pio_copy_data(struct kvm_vcpu *vcpu)
-{
- void *p = vcpu->arch.pio_data;
- gva_t q = vcpu->arch.pio.guest_gva;
- unsigned bytes;
- int ret;
-
- bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
- if (vcpu->arch.pio.in)
- ret = kvm_write_guest_virt(q, p, bytes, vcpu);
- else
- ret = kvm_read_guest_virt(q, p, bytes, vcpu);
- return ret;
-}
-
-int complete_pio(struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->arch.pio;
- long delta;
- int r;
- unsigned long val;
-
- if (!io->string) {
- if (io->in) {
- val = kvm_register_read(vcpu, VCPU_REGS_RAX);
- memcpy(&val, vcpu->arch.pio_data, io->size);
- kvm_register_write(vcpu, VCPU_REGS_RAX, val);
- }
- } else {
- if (io->in) {
- r = pio_copy_data(vcpu);
- if (r)
- return r;
- }
-
- delta = 1;
- if (io->rep) {
- delta *= io->cur_count;
- /*
- * The size of the register should really depend on
- * current address size.
- */
- val = kvm_register_read(vcpu, VCPU_REGS_RCX);
- val -= delta;
- kvm_register_write(vcpu, VCPU_REGS_RCX, val);
- }
- if (io->down)
- delta = -delta;
- delta *= io->size;
- if (io->in) {
- val = kvm_register_read(vcpu, VCPU_REGS_RDI);
- val += delta;
- kvm_register_write(vcpu, VCPU_REGS_RDI, val);
- } else {
- val = kvm_register_read(vcpu, VCPU_REGS_RSI);
- val += delta;
- kvm_register_write(vcpu, VCPU_REGS_RSI, val);
- }
- }
-
- io->count -= io->cur_count;
- io->cur_count = 0;
-
- return 0;
-}
-
-static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
-{
- /* TODO: String I/O for in kernel device */
- int r;
-
- if (vcpu->arch.pio.in)
- r = kvm_io_bus_read(&vcpu->kvm->pio_bus, vcpu->arch.pio.port,
- vcpu->arch.pio.size, pd);
- else
- r = kvm_io_bus_write(&vcpu->kvm->pio_bus, vcpu->arch.pio.port,
- vcpu->arch.pio.size, pd);
- return r;
-}
-
-static int pio_string_write(struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->arch.pio;
- void *pd = vcpu->arch.pio_data;
- int i, r = 0;
-
- for (i = 0; i < io->cur_count; i++) {
- if (kvm_io_bus_write(&vcpu->kvm->pio_bus,
- io->port, io->size, pd)) {
- r = -EOPNOTSUPP;
- break;
- }
- pd += io->size;
- }
- return r;
-}
-
-int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port)
-{
- unsigned long val;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->arch.pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
- vcpu->run->io.port = vcpu->arch.pio.port = port;
- vcpu->arch.pio.in = in;
- vcpu->arch.pio.string = 0;
- vcpu->arch.pio.down = 0;
- vcpu->arch.pio.rep = 0;
-
- trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port,
- size, 1);
+done:
+ if (vcpu->arch.exception.pending)
+ vcpu->arch.emulate_ctxt.restart = false;
- val = kvm_register_read(vcpu, VCPU_REGS_RAX);
- memcpy(vcpu->arch.pio_data, &val, 4);
+ if (vcpu->arch.emulate_ctxt.restart)
+ goto restart;
- if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
- complete_pio(vcpu);
- return 1;
- }
- return 0;
+ return EMULATE_DONE;
}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio);
+EXPORT_SYMBOL_GPL(emulate_instruction);
-int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in,
- int size, unsigned long count, int down,
- gva_t address, int rep, unsigned port)
+int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
{
- unsigned now, in_page;
- int ret = 0;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->arch.pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
- vcpu->run->io.port = vcpu->arch.pio.port = port;
- vcpu->arch.pio.in = in;
- vcpu->arch.pio.string = 1;
- vcpu->arch.pio.down = down;
- vcpu->arch.pio.rep = rep;
-
- trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port,
- size, count);
-
- if (!count) {
- kvm_x86_ops->skip_emulated_instruction(vcpu);
- return 1;
- }
-
- if (!down)
- in_page = PAGE_SIZE - offset_in_page(address);
- else
- in_page = offset_in_page(address) + size;
- now = min(count, (unsigned long)in_page / size);
- if (!now)
- now = 1;
- if (down) {
- /*
- * String I/O in reverse. Yuck. Kill the guest, fix later.
- */
- pr_unimpl(vcpu, "guest string pio down\n");
- kvm_inject_gp(vcpu, 0);
- return 1;
- }
- vcpu->run->io.count = now;
- vcpu->arch.pio.cur_count = now;
-
- if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
- vcpu->arch.pio.guest_gva = address;
-
- if (!vcpu->arch.pio.in) {
- /* string PIO write */
- ret = pio_copy_data(vcpu);
- if (ret == X86EMUL_PROPAGATE_FAULT) {
- kvm_inject_gp(vcpu, 0);
- return 1;
- }
- if (ret == 0 && !pio_string_write(vcpu)) {
- complete_pio(vcpu);
- if (vcpu->arch.pio.count == 0)
- ret = 1;
- }
- }
- /* no string PIO read support yet */
-
+ unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
+ int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu);
+ /* do not return to emulator after return from userspace */
+ vcpu->arch.pio.count = 0;
return ret;
}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
+EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
static void bounce_off(void *info)
{
}
}
+static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+
+static int kvm_is_in_guest(void)
+{
+ return percpu_read(current_vcpu) != NULL;
+}
+
+static int kvm_is_user_mode(void)
+{
+ int user_mode = 3;
+
+ if (percpu_read(current_vcpu))
+ user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
+
+ return user_mode != 0;
+}
+
+static unsigned long kvm_get_guest_ip(void)
+{
+ unsigned long ip = 0;
+
+ if (percpu_read(current_vcpu))
+ ip = kvm_rip_read(percpu_read(current_vcpu));
+
+ return ip;
+}
+
+static struct perf_guest_info_callbacks kvm_guest_cbs = {
+ .is_in_guest = kvm_is_in_guest,
+ .is_user_mode = kvm_is_user_mode,
+ .get_guest_ip = kvm_get_guest_ip,
+};
+
+void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
+
+void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, NULL);
+}
+EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
+
int kvm_arch_init(void *opaque)
{
int r;
kvm_timer_init();
+ perf_register_guest_info_callbacks(&kvm_guest_cbs);
+
return 0;
out:
void kvm_arch_exit(void)
{
+ perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+
if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
return a0 | ((gpa_t)a1 << 32);
}
+int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
+{
+ u64 param, ingpa, outgpa, ret;
+ uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
+ bool fast, longmode;
+ int cs_db, cs_l;
+
+ /*
+ * hypercall generates UD from non zero cpl and real mode
+ * per HYPER-V spec
+ */
+ if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 0;
+ }
+
+ kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
+ longmode = is_long_mode(vcpu) && cs_l == 1;
+
+ if (!longmode) {
+ param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
+ (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
+ ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
+ (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
+ outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
+ (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
+ }
+#ifdef CONFIG_X86_64
+ else {
+ param = kvm_register_read(vcpu, VCPU_REGS_RCX);
+ ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
+ outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
+ }
+#endif
+
+ code = param & 0xffff;
+ fast = (param >> 16) & 0x1;
+ rep_cnt = (param >> 32) & 0xfff;
+ rep_idx = (param >> 48) & 0xfff;
+
+ trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
+
+ switch (code) {
+ case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
+ kvm_vcpu_on_spin(vcpu);
+ break;
+ default:
+ res = HV_STATUS_INVALID_HYPERCALL_CODE;
+ break;
+ }
+
+ ret = res | (((u64)rep_done & 0xfff) << 32);
+ if (longmode) {
+ kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
+ } else {
+ kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
+ kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
+ }
+
+ return 1;
+}
+
int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
{
unsigned long nr, a0, a1, a2, a3, ret;
int r = 1;
+ if (kvm_hv_hypercall_enabled(vcpu->kvm))
+ return kvm_hv_hypercall(vcpu);
+
nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
{
char instruction[3];
- int ret = 0;
unsigned long rip = kvm_rip_read(vcpu);
-
/*
* Blow out the MMU to ensure that no other VCPU has an active mapping
* to ensure that the updated hypercall appears atomically across all
kvm_mmu_zap_all(vcpu->kvm);
kvm_x86_ops->patch_hypercall(vcpu, instruction);
- if (emulator_write_emulated(rip, instruction, 3, vcpu)
- != X86EMUL_CONTINUE)
- ret = -EFAULT;
-
- return ret;
-}
-
-static u64 mk_cr_64(u64 curr_cr, u32 new_val)
-{
- return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
+
+ return emulator_write_emulated(rip, instruction, 3, vcpu);
}
void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
{
- struct descriptor_table dt = { limit, base };
+ struct desc_ptr dt = { limit, base };
kvm_x86_ops->set_gdt(vcpu, &dt);
}
void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
{
- struct descriptor_table dt = { limit, base };
+ struct desc_ptr dt = { limit, base };
kvm_x86_ops->set_idt(vcpu, &dt);
}
-void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
- unsigned long *rflags)
-{
- kvm_lmsw(vcpu, msw);
- *rflags = kvm_get_rflags(vcpu);
-}
-
-unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
-{
- unsigned long value;
-
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- switch (cr) {
- case 0:
- value = vcpu->arch.cr0;
- break;
- case 2:
- value = vcpu->arch.cr2;
- break;
- case 3:
- value = vcpu->arch.cr3;
- break;
- case 4:
- value = vcpu->arch.cr4;
- break;
- case 8:
- value = kvm_get_cr8(vcpu);
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
- return 0;
- }
-
- return value;
-}
-
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
- unsigned long *rflags)
-{
- switch (cr) {
- case 0:
- kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val));
- *rflags = kvm_get_rflags(vcpu);
- break;
- case 2:
- vcpu->arch.cr2 = val;
- break;
- case 3:
- kvm_set_cr3(vcpu, val);
- break;
- case 4:
- kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val));
- break;
- case 8:
- kvm_set_cr8(vcpu, val & 0xfUL);
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
- }
-}
-
static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
{
struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
}
return best;
}
+EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
+ best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0);
+ if (!best || best->eax < 0x80000008)
+ goto not_found;
best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
if (best)
return best->eax & 0xff;
+not_found:
return 36;
}
static void vapic_exit(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic = vcpu->arch.apic;
+ int idx;
if (!apic || !apic->vapic_addr)
return;
- down_read(&vcpu->kvm->slots_lock);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
kvm_release_page_dirty(apic->vapic_page);
mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
}
static void update_cr8_intercept(struct kvm_vcpu *vcpu)
{
/* try to reinject previous events if any */
if (vcpu->arch.exception.pending) {
+ trace_kvm_inj_exception(vcpu->arch.exception.nr,
+ vcpu->arch.exception.has_error_code,
+ vcpu->arch.exception.error_code);
kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
vcpu->arch.exception.has_error_code,
- vcpu->arch.exception.error_code);
+ vcpu->arch.exception.error_code,
+ vcpu->arch.exception.reinject);
return;
}
r = 0;
goto out;
}
+ if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) {
+ vcpu->fpu_active = 0;
+ kvm_x86_ops->fpu_deactivate(vcpu);
+ }
}
preempt_disable();
kvm_x86_ops->prepare_guest_switch(vcpu);
- kvm_load_guest_fpu(vcpu);
+ if (vcpu->fpu_active)
+ kvm_load_guest_fpu(vcpu);
local_irq_disable();
kvm_lapic_sync_to_vapic(vcpu);
}
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
kvm_guest_enter();
preempt_enable();
- down_read(&vcpu->kvm->slots_lock);
+ vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
/*
* Profile KVM exit RIPs:
static int __vcpu_run(struct kvm_vcpu *vcpu)
{
int r;
+ struct kvm *kvm = vcpu->kvm;
if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
pr_debug("vcpu %d received sipi with vector # %x\n",
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
}
- down_read(&vcpu->kvm->slots_lock);
+ vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
vapic_enter(vcpu);
r = 1;
if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
r = vcpu_enter_guest(vcpu);
else {
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
kvm_vcpu_block(vcpu);
- down_read(&vcpu->kvm->slots_lock);
+ vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
{
switch(vcpu->arch.mp_state) {
++vcpu->stat.signal_exits;
}
if (need_resched()) {
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
kvm_resched(vcpu);
- down_read(&vcpu->kvm->slots_lock);
+ vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
}
}
- up_read(&vcpu->kvm->slots_lock);
- post_kvm_run_save(vcpu);
+ srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
vapic_exit(vcpu);
if (!irqchip_in_kernel(vcpu->kvm))
kvm_set_cr8(vcpu, kvm_run->cr8);
- if (vcpu->arch.pio.cur_count) {
- r = complete_pio(vcpu);
- if (r)
- goto out;
- }
- if (vcpu->mmio_needed) {
- memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
- vcpu->mmio_read_completed = 1;
- vcpu->mmio_needed = 0;
-
- down_read(&vcpu->kvm->slots_lock);
- r = emulate_instruction(vcpu, vcpu->arch.mmio_fault_cr2, 0,
- EMULTYPE_NO_DECODE);
- up_read(&vcpu->kvm->slots_lock);
+ if (vcpu->arch.pio.count || vcpu->mmio_needed ||
+ vcpu->arch.emulate_ctxt.restart) {
+ if (vcpu->mmio_needed) {
+ memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
+ vcpu->mmio_read_completed = 1;
+ vcpu->mmio_needed = 0;
+ }
+ vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE);
+ srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
if (r == EMULATE_DO_MMIO) {
- /*
- * Read-modify-write. Back to userspace.
- */
r = 0;
goto out;
}
r = __vcpu_run(vcpu);
out:
+ post_kvm_run_save(vcpu);
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
return 0;
}
-void kvm_get_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- kvm_x86_ops->get_segment(vcpu, var, seg);
-}
-
void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
{
struct kvm_segment cs;
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
- struct descriptor_table dt;
+ struct desc_ptr dt;
vcpu_load(vcpu);
kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
kvm_x86_ops->get_idt(vcpu, &dt);
- sregs->idt.limit = dt.limit;
- sregs->idt.base = dt.base;
+ sregs->idt.limit = dt.size;
+ sregs->idt.base = dt.address;
kvm_x86_ops->get_gdt(vcpu, &dt);
- sregs->gdt.limit = dt.limit;
- sregs->gdt.base = dt.base;
+ sregs->gdt.limit = dt.size;
+ sregs->gdt.base = dt.address;
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- sregs->cr0 = vcpu->arch.cr0;
+ sregs->cr0 = kvm_read_cr0(vcpu);
sregs->cr2 = vcpu->arch.cr2;
sregs->cr3 = vcpu->arch.cr3;
- sregs->cr4 = vcpu->arch.cr4;
+ sregs->cr4 = kvm_read_cr4(vcpu);
sregs->cr8 = kvm_get_cr8(vcpu);
- sregs->efer = vcpu->arch.shadow_efer;
+ sregs->efer = vcpu->arch.efer;
sregs->apic_base = kvm_get_apic_base(vcpu);
memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
return 0;
}
-static void kvm_set_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- kvm_x86_ops->set_segment(vcpu, var, seg);
-}
-
-static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector,
- struct kvm_segment *kvm_desct)
-{
- kvm_desct->base = get_desc_base(seg_desc);
- kvm_desct->limit = get_desc_limit(seg_desc);
- if (seg_desc->g) {
- kvm_desct->limit <<= 12;
- kvm_desct->limit |= 0xfff;
- }
- kvm_desct->selector = selector;
- kvm_desct->type = seg_desc->type;
- kvm_desct->present = seg_desc->p;
- kvm_desct->dpl = seg_desc->dpl;
- kvm_desct->db = seg_desc->d;
- kvm_desct->s = seg_desc->s;
- kvm_desct->l = seg_desc->l;
- kvm_desct->g = seg_desc->g;
- kvm_desct->avl = seg_desc->avl;
- if (!selector)
- kvm_desct->unusable = 1;
- else
- kvm_desct->unusable = 0;
- kvm_desct->padding = 0;
-}
-
-static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu,
- u16 selector,
- struct descriptor_table *dtable)
-{
- if (selector & 1 << 2) {
- struct kvm_segment kvm_seg;
-
- kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR);
-
- if (kvm_seg.unusable)
- dtable->limit = 0;
- else
- dtable->limit = kvm_seg.limit;
- dtable->base = kvm_seg.base;
- }
- else
- kvm_x86_ops->get_gdt(vcpu, dtable);
-}
-
-/* allowed just for 8 bytes segments */
-static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
- struct desc_struct *seg_desc)
-{
- struct descriptor_table dtable;
- u16 index = selector >> 3;
-
- get_segment_descriptor_dtable(vcpu, selector, &dtable);
-
- if (dtable.limit < index * 8 + 7) {
- kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc);
- return 1;
- }
- return kvm_read_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu);
-}
-
-/* allowed just for 8 bytes segments */
-static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
- struct desc_struct *seg_desc)
-{
- struct descriptor_table dtable;
- u16 index = selector >> 3;
-
- get_segment_descriptor_dtable(vcpu, selector, &dtable);
-
- if (dtable.limit < index * 8 + 7)
- return 1;
- return kvm_write_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu);
-}
-
-static gpa_t get_tss_base_addr(struct kvm_vcpu *vcpu,
- struct desc_struct *seg_desc)
-{
- u32 base_addr = get_desc_base(seg_desc);
-
- return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr);
-}
-
-static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg)
-{
- struct kvm_segment kvm_seg;
-
- kvm_get_segment(vcpu, &kvm_seg, seg);
- return kvm_seg.selector;
-}
-
-static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu,
- u16 selector,
- struct kvm_segment *kvm_seg)
-{
- struct desc_struct seg_desc;
-
- if (load_guest_segment_descriptor(vcpu, selector, &seg_desc))
- return 1;
- seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg);
- return 0;
-}
-
-static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg)
-{
- struct kvm_segment segvar = {
- .base = selector << 4,
- .limit = 0xffff,
- .selector = selector,
- .type = 3,
- .present = 1,
- .dpl = 3,
- .db = 0,
- .s = 1,
- .l = 0,
- .g = 0,
- .avl = 0,
- .unusable = 0,
- };
- kvm_x86_ops->set_segment(vcpu, &segvar, seg);
- return 0;
-}
-
-static int is_vm86_segment(struct kvm_vcpu *vcpu, int seg)
-{
- return (seg != VCPU_SREG_LDTR) &&
- (seg != VCPU_SREG_TR) &&
- (kvm_get_rflags(vcpu) & X86_EFLAGS_VM);
-}
-
-int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
- int type_bits, int seg)
-{
- struct kvm_segment kvm_seg;
-
- if (is_vm86_segment(vcpu, seg) || !(vcpu->arch.cr0 & X86_CR0_PE))
- return kvm_load_realmode_segment(vcpu, selector, seg);
- if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg))
- return 1;
- kvm_seg.type |= type_bits;
-
- if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS &&
- seg != VCPU_SREG_LDTR)
- if (!kvm_seg.s)
- kvm_seg.unusable = 1;
-
- kvm_set_segment(vcpu, &kvm_seg, seg);
- return 0;
-}
-
-static void save_state_to_tss32(struct kvm_vcpu *vcpu,
- struct tss_segment_32 *tss)
-{
- tss->cr3 = vcpu->arch.cr3;
- tss->eip = kvm_rip_read(vcpu);
- tss->eflags = kvm_get_rflags(vcpu);
- tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX);
- tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
- tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX);
- tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX);
- tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP);
- tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP);
- tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI);
- tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI);
- tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
- tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
- tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
- tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
- tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS);
- tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS);
- tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR);
-}
-
-static int load_state_from_tss32(struct kvm_vcpu *vcpu,
- struct tss_segment_32 *tss)
-{
- kvm_set_cr3(vcpu, tss->cr3);
-
- kvm_rip_write(vcpu, tss->eip);
- kvm_set_rflags(vcpu, tss->eflags | 2);
-
- kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax);
- kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx);
- kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx);
- kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx);
- kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp);
- kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp);
- kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi);
- kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi);
-
- if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS))
- return 1;
- return 0;
-}
-
-static void save_state_to_tss16(struct kvm_vcpu *vcpu,
- struct tss_segment_16 *tss)
-{
- tss->ip = kvm_rip_read(vcpu);
- tss->flag = kvm_get_rflags(vcpu);
- tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX);
- tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX);
- tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX);
- tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX);
- tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP);
- tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP);
- tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI);
- tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI);
-
- tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
- tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
- tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
- tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
- tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR);
-}
-
-static int load_state_from_tss16(struct kvm_vcpu *vcpu,
- struct tss_segment_16 *tss)
-{
- kvm_rip_write(vcpu, tss->ip);
- kvm_set_rflags(vcpu, tss->flag | 2);
- kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax);
- kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx);
- kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx);
- kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx);
- kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp);
- kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp);
- kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si);
- kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di);
-
- if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS))
- return 1;
-
- if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS))
- return 1;
- return 0;
-}
-
-static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector,
- u16 old_tss_sel, u32 old_tss_base,
- struct desc_struct *nseg_desc)
-{
- struct tss_segment_16 tss_segment_16;
- int ret = 0;
-
- if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
- sizeof tss_segment_16))
- goto out;
-
- save_state_to_tss16(vcpu, &tss_segment_16);
-
- if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
- sizeof tss_segment_16))
- goto out;
-
- if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc),
- &tss_segment_16, sizeof tss_segment_16))
- goto out;
-
- if (old_tss_sel != 0xffff) {
- tss_segment_16.prev_task_link = old_tss_sel;
-
- if (kvm_write_guest(vcpu->kvm,
- get_tss_base_addr(vcpu, nseg_desc),
- &tss_segment_16.prev_task_link,
- sizeof tss_segment_16.prev_task_link))
- goto out;
- }
-
- if (load_state_from_tss16(vcpu, &tss_segment_16))
- goto out;
-
- ret = 1;
-out:
- return ret;
-}
-
-static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector,
- u16 old_tss_sel, u32 old_tss_base,
- struct desc_struct *nseg_desc)
-{
- struct tss_segment_32 tss_segment_32;
- int ret = 0;
-
- if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
- sizeof tss_segment_32))
- goto out;
-
- save_state_to_tss32(vcpu, &tss_segment_32);
-
- if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
- sizeof tss_segment_32))
- goto out;
-
- if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc),
- &tss_segment_32, sizeof tss_segment_32))
- goto out;
-
- if (old_tss_sel != 0xffff) {
- tss_segment_32.prev_task_link = old_tss_sel;
-
- if (kvm_write_guest(vcpu->kvm,
- get_tss_base_addr(vcpu, nseg_desc),
- &tss_segment_32.prev_task_link,
- sizeof tss_segment_32.prev_task_link))
- goto out;
- }
-
- if (load_state_from_tss32(vcpu, &tss_segment_32))
- goto out;
-
- ret = 1;
-out:
- return ret;
-}
-
-int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason)
+int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
+ bool has_error_code, u32 error_code)
{
- struct kvm_segment tr_seg;
- struct desc_struct cseg_desc;
- struct desc_struct nseg_desc;
- int ret = 0;
- u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR);
- u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR);
-
- old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base);
-
- /* FIXME: Handle errors. Failure to read either TSS or their
- * descriptors should generate a pagefault.
- */
- if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc))
- goto out;
-
- if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc))
- goto out;
-
- if (reason != TASK_SWITCH_IRET) {
- int cpl;
-
- cpl = kvm_x86_ops->get_cpl(vcpu);
- if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) {
- kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
- return 1;
- }
- }
-
- if (!nseg_desc.p || get_desc_limit(&nseg_desc) < 0x67) {
- kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc);
- return 1;
- }
-
- if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) {
- cseg_desc.type &= ~(1 << 1); //clear the B flag
- save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc);
- }
-
- if (reason == TASK_SWITCH_IRET) {
- u32 eflags = kvm_get_rflags(vcpu);
- kvm_set_rflags(vcpu, eflags & ~X86_EFLAGS_NT);
- }
+ int cs_db, cs_l, ret;
+ cache_all_regs(vcpu);
- /* set back link to prev task only if NT bit is set in eflags
- note that old_tss_sel is not used afetr this point */
- if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE)
- old_tss_sel = 0xffff;
+ kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
- if (nseg_desc.type & 8)
- ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel,
- old_tss_base, &nseg_desc);
- else
- ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel,
- old_tss_base, &nseg_desc);
+ vcpu->arch.emulate_ctxt.vcpu = vcpu;
+ vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
+ vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
+ vcpu->arch.emulate_ctxt.mode =
+ (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
+ (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
+ ? X86EMUL_MODE_VM86 : cs_l
+ ? X86EMUL_MODE_PROT64 : cs_db
+ ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
- if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) {
- u32 eflags = kvm_get_rflags(vcpu);
- kvm_set_rflags(vcpu, eflags | X86_EFLAGS_NT);
- }
+ ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops,
+ tss_selector, reason, has_error_code,
+ error_code);
- if (reason != TASK_SWITCH_IRET) {
- nseg_desc.type |= (1 << 1);
- save_guest_segment_descriptor(vcpu, tss_selector,
- &nseg_desc);
- }
+ if (ret)
+ return EMULATE_FAIL;
- kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS);
- seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg);
- tr_seg.type = 11;
- kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR);
-out:
- return ret;
+ kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
+ return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvm_task_switch);
{
int mmu_reset_needed = 0;
int pending_vec, max_bits;
- struct descriptor_table dt;
+ struct desc_ptr dt;
vcpu_load(vcpu);
- dt.limit = sregs->idt.limit;
- dt.base = sregs->idt.base;
+ dt.size = sregs->idt.limit;
+ dt.address = sregs->idt.base;
kvm_x86_ops->set_idt(vcpu, &dt);
- dt.limit = sregs->gdt.limit;
- dt.base = sregs->gdt.base;
+ dt.size = sregs->gdt.limit;
+ dt.address = sregs->gdt.base;
kvm_x86_ops->set_gdt(vcpu, &dt);
vcpu->arch.cr2 = sregs->cr2;
kvm_set_cr8(vcpu, sregs->cr8);
- mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
+ mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
kvm_x86_ops->set_efer(vcpu, sregs->efer);
kvm_set_apic_base(vcpu, sregs->apic_base);
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
-
- mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0;
+ mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
vcpu->arch.cr0 = sregs->cr0;
- mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4;
+ mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
if (!is_long_mode(vcpu) && is_pae(vcpu)) {
load_pdptrs(vcpu, vcpu->arch.cr3);
/* Older userspace won't unhalt the vcpu on reset. */
if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
- !(vcpu->arch.cr0 & X86_CR0_PE))
+ !is_protmode(vcpu))
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
vcpu_put(vcpu);
vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
}
- if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
- vcpu->arch.singlestep_cs =
- get_segment_selector(vcpu, VCPU_SREG_CS);
- vcpu->arch.singlestep_rip = kvm_rip_read(vcpu);
- }
+ if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
+ vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
+ get_segment_base(vcpu, VCPU_SREG_CS);
/*
* Trigger an rflags update that will inject or remove the trace
{
unsigned long vaddr = tr->linear_address;
gpa_t gpa;
+ int idx;
vcpu_load(vcpu);
- down_read(&vcpu->kvm->slots_lock);
- gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr);
- up_read(&vcpu->kvm->slots_lock);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+ gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
tr->physical_address = gpa;
tr->valid = gpa != UNMAPPED_GVA;
tr->writeable = 1;
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
{
- if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
+ if (vcpu->guest_fpu_loaded)
return;
vcpu->guest_fpu_loaded = 1;
kvm_fx_save(&vcpu->arch.host_fx_image);
kvm_fx_restore(&vcpu->arch.guest_fx_image);
+ trace_kvm_fpu(1);
}
-EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
{
kvm_fx_save(&vcpu->arch.guest_fx_image);
kvm_fx_restore(&vcpu->arch.host_fx_image);
++vcpu->stat.fpu_reload;
+ set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
+ trace_kvm_fpu(0);
}
-EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
+ int idx;
+
kfree(vcpu->arch.mce_banks);
kvm_free_lapic(vcpu);
- down_read(&vcpu->kvm->slots_lock);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
kvm_mmu_destroy(vcpu);
- up_read(&vcpu->kvm->slots_lock);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
free_page((unsigned long)vcpu->arch.pio_data);
}
if (!kvm)
return ERR_PTR(-ENOMEM);
+ kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
+ if (!kvm->arch.aliases) {
+ kfree(kvm);
+ return ERR_PTR(-ENOMEM);
+ }
+
INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
put_page(kvm->arch.apic_access_page);
if (kvm->arch.ept_identity_pagetable)
put_page(kvm->arch.ept_identity_pagetable);
+ cleanup_srcu_struct(&kvm->srcu);
+ kfree(kvm->arch.aliases);
kfree(kvm);
}
-int kvm_arch_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
+int kvm_arch_prepare_memory_region(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
struct kvm_memory_slot old,
+ struct kvm_userspace_memory_region *mem,
int user_alloc)
{
- int npages = mem->memory_size >> PAGE_SHIFT;
- struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
+ int npages = memslot->npages;
/*To keep backward compatibility with older userspace,
*x86 needs to hanlde !user_alloc case.
if (IS_ERR((void *)userspace_addr))
return PTR_ERR((void *)userspace_addr);
- /* set userspace_addr atomically for kvm_hva_to_rmapp */
- spin_lock(&kvm->mmu_lock);
memslot->userspace_addr = userspace_addr;
- spin_unlock(&kvm->mmu_lock);
- } else {
- if (!old.user_alloc && old.rmap) {
- int ret;
-
- down_write(¤t->mm->mmap_sem);
- ret = do_munmap(current->mm, old.userspace_addr,
- old.npages * PAGE_SIZE);
- up_write(¤t->mm->mmap_sem);
- if (ret < 0)
- printk(KERN_WARNING
- "kvm_vm_ioctl_set_memory_region: "
- "failed to munmap memory\n");
- }
}
}
+
+ return 0;
+}
+
+void kvm_arch_commit_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ struct kvm_memory_slot old,
+ int user_alloc)
+{
+
+ int npages = mem->memory_size >> PAGE_SHIFT;
+
+ if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
+ int ret;
+
+ down_write(¤t->mm->mmap_sem);
+ ret = do_munmap(current->mm, old.userspace_addr,
+ old.npages * PAGE_SIZE);
+ up_write(¤t->mm->mmap_sem);
+ if (ret < 0)
+ printk(KERN_WARNING
+ "kvm_vm_ioctl_set_memory_region: "
+ "failed to munmap memory\n");
+ }
+
spin_lock(&kvm->mmu_lock);
if (!kvm->arch.n_requested_mmu_pages) {
unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
kvm_mmu_slot_remove_write_access(kvm, mem->slot);
spin_unlock(&kvm->mmu_lock);
-
- return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)
return kvm_x86_ops->interrupt_allowed(vcpu);
}
+bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
+{
+ unsigned long current_rip = kvm_rip_read(vcpu) +
+ get_segment_base(vcpu, VCPU_SREG_CS);
+
+ return current_rip == linear_rip;
+}
+EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
+
unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
{
unsigned long rflags;
rflags = kvm_x86_ops->get_rflags(vcpu);
if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
- rflags &= ~(unsigned long)(X86_EFLAGS_TF | X86_EFLAGS_RF);
+ rflags &= ~X86_EFLAGS_TF;
return rflags;
}
EXPORT_SYMBOL_GPL(kvm_get_rflags);
void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
- vcpu->arch.singlestep_cs ==
- get_segment_selector(vcpu, VCPU_SREG_CS) &&
- vcpu->arch.singlestep_rip == kvm_rip_read(vcpu))
- rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
+ kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
+ rflags |= X86_EFLAGS_TF;
kvm_x86_ops->set_rflags(vcpu, rflags);
}
EXPORT_SYMBOL_GPL(kvm_set_rflags);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff