X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fasm-x86%2Fparavirt.h;h=d6236eb46466c19ed4ebab33e64b3290ca127f53;hb=7bfeab9af95565e38a97fbcfb631e5b140241187;hp=e8fbf742d42567e02b489f1a4ec0c5d61a260e65;hpb=e801f864ec7e5b149bd05337800e419f408523bb;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index e8fbf74..d6236eb 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -8,11 +8,24 @@
 #include <asm/asm.h>
 
 /* Bitmask of what can be clobbered: usually at least eax. */
-#define CLBR_NONE 0x0
-#define CLBR_EAX 0x1
-#define CLBR_ECX 0x2
-#define CLBR_EDX 0x4
-#define CLBR_ANY 0x7
+#define CLBR_NONE 0
+#define CLBR_EAX  (1 << 0)
+#define CLBR_ECX  (1 << 1)
+#define CLBR_EDX  (1 << 2)
+
+#ifdef CONFIG_X86_64
+#define CLBR_RSI  (1 << 3)
+#define CLBR_RDI  (1 << 4)
+#define CLBR_R8   (1 << 5)
+#define CLBR_R9   (1 << 6)
+#define CLBR_R10  (1 << 7)
+#define CLBR_R11  (1 << 8)
+#define CLBR_ANY  ((1 << 9) - 1)
+#include <asm/desc_defs.h>
+#else
+/* CLBR_ANY should match all regs platform has. For i386, that's just it */
+#define CLBR_ANY  ((1 << 3) - 1)
+#endif /* X86_64 */
 
 #ifndef __ASSEMBLY__
 #include <linux/types.h>
@@ -88,6 +101,11 @@ struct pv_cpu_ops {
 	unsigned long (*read_cr4)(void);
 	void (*write_cr4)(unsigned long);
 
+#ifdef CONFIG_X86_64
+	unsigned long (*read_cr8)(void);
+	void (*write_cr8)(unsigned long);
+#endif
+
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
 	void (*load_gdt)(const struct desc_ptr *);
@@ -203,7 +221,7 @@ struct pv_mmu_ops {
 
 	/* Hooks for allocating/releasing pagetable pages */
 	void (*alloc_pt)(struct mm_struct *mm, u32 pfn);
-	void (*alloc_pd)(u32 pfn);
+	void (*alloc_pd)(struct mm_struct *mm, u32 pfn);
 	void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
 	void (*release_pt)(u32 pfn);
 	void (*release_pd)(u32 pfn);
@@ -217,28 +235,34 @@ struct pv_mmu_ops {
 	void (*pte_update_defer)(struct mm_struct *mm,
 				 unsigned long addr, pte_t *ptep);
 
+	pteval_t (*pte_val)(pte_t);
+	pte_t (*make_pte)(pteval_t pte);
+
+	pgdval_t (*pgd_val)(pgd_t);
+	pgd_t (*make_pgd)(pgdval_t pgd);
+
+#if PAGETABLE_LEVELS >= 3
 #ifdef CONFIG_X86_PAE
 	void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
 	void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
 				pte_t *ptep, pte_t pte);
-	void (*set_pud)(pud_t *pudp, pud_t pudval);
 	void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
 	void (*pmd_clear)(pmd_t *pmdp);
 
-	unsigned long long (*pte_val)(pte_t);
-	unsigned long long (*pmd_val)(pmd_t);
-	unsigned long long (*pgd_val)(pgd_t);
+#endif	/* CONFIG_X86_PAE */
 
-	pte_t (*make_pte)(unsigned long long pte);
-	pmd_t (*make_pmd)(unsigned long long pmd);
-	pgd_t (*make_pgd)(unsigned long long pgd);
-#else
-	unsigned long (*pte_val)(pte_t);
-	unsigned long (*pgd_val)(pgd_t);
+	void (*set_pud)(pud_t *pudp, pud_t pudval);
 
-	pte_t (*make_pte)(unsigned long pte);
-	pgd_t (*make_pgd)(unsigned long pgd);
-#endif
+	pmdval_t (*pmd_val)(pmd_t);
+	pmd_t (*make_pmd)(pmdval_t pmd);
+
+#if PAGETABLE_LEVELS == 4
+	pudval_t (*pud_val)(pud_t);
+	pud_t (*make_pud)(pudval_t pud);
+
+	void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
+#endif	/* PAGETABLE_LEVELS == 4 */
+#endif	/* PAGETABLE_LEVELS >= 3 */
 
 #ifdef CONFIG_HIGHPTE
 	void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
@@ -295,6 +319,11 @@ extern struct pv_mmu_ops pv_mmu_ops;
 #define paravirt_alt(insn_string)					\
 	_paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
 
+/* Simple instruction patching code. */
+#define DEF_NATIVE(ops, name, code) 					\
+	extern const char start_##ops##_##name[], end_##ops##_##name[];	\
+	asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
+
 unsigned paravirt_patch_nop(void);
 unsigned paravirt_patch_ignore(unsigned len);
 unsigned paravirt_patch_call(void *insnbuf,
@@ -309,6 +338,9 @@ unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
 			      const char *start, const char *end);
 
+unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
+		      unsigned long addr, unsigned len);
+
 int paravirt_disable_iospace(void);
 
 /*
@@ -589,6 +621,18 @@ static inline void write_cr4(unsigned long x)
 	PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
 }
 
+#ifdef CONFIG_X86_64
+static inline unsigned long read_cr8(void)
+{
+	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
+}
+
+static inline void write_cr8(unsigned long x)
+{
+	PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
+}
+#endif
+
 static inline void raw_safe_halt(void)
 {
 	PVOP_VCALL0(pv_irq_ops.safe_halt);
@@ -859,9 +903,9 @@ static inline void paravirt_release_pt(unsigned pfn)
 	PVOP_VCALL1(pv_mmu_ops.release_pt, pfn);
 }
 
-static inline void paravirt_alloc_pd(unsigned pfn)
+static inline void paravirt_alloc_pd(struct mm_struct *mm, unsigned pfn)
 {
-	PVOP_VCALL1(pv_mmu_ops.alloc_pd, pfn);
+	PVOP_VCALL2(pv_mmu_ops.alloc_pd, mm, pfn);
 }
 
 static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn,
@@ -895,128 +939,236 @@ static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
 	PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
 }
 
-#ifdef CONFIG_X86_PAE
-static inline pte_t __pte(unsigned long long val)
+static inline pte_t __pte(pteval_t val)
 {
-	unsigned long long ret = PVOP_CALL2(unsigned long long,
-					    pv_mmu_ops.make_pte,
-					    val, val >> 32);
-	return (pte_t) { ret, ret >> 32 };
+	pteval_t ret;
+
+	if (sizeof(pteval_t) > sizeof(long))
+		ret = PVOP_CALL2(pteval_t,
+				 pv_mmu_ops.make_pte,
+				 val, (u64)val >> 32);
+	else
+		ret = PVOP_CALL1(pteval_t,
+				 pv_mmu_ops.make_pte,
+				 val);
+
+	return (pte_t) { .pte = ret };
 }
 
-static inline pmd_t __pmd(unsigned long long val)
+static inline pteval_t pte_val(pte_t pte)
 {
-	return (pmd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pmd,
-				    val, val >> 32) };
+	pteval_t ret;
+
+	if (sizeof(pteval_t) > sizeof(long))
+		ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_val,
+				 pte.pte, (u64)pte.pte >> 32);
+	else
+		ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_val,
+				 pte.pte);
+
+	return ret;
 }
 
-static inline pgd_t __pgd(unsigned long long val)
+static inline pgd_t __pgd(pgdval_t val)
 {
-	return (pgd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pgd,
-				    val, val >> 32) };
+	pgdval_t ret;
+
+	if (sizeof(pgdval_t) > sizeof(long))
+		ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.make_pgd,
+				 val, (u64)val >> 32);
+	else
+		ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.make_pgd,
+				 val);
+
+	return (pgd_t) { ret };
 }
 
-static inline unsigned long long pte_val(pte_t x)
+static inline pgdval_t pgd_val(pgd_t pgd)
 {
-	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pte_val,
-			  x.pte_low, x.pte_high);
+	pgdval_t ret;
+
+	if (sizeof(pgdval_t) > sizeof(long))
+		ret =  PVOP_CALL2(pgdval_t, pv_mmu_ops.pgd_val,
+				  pgd.pgd, (u64)pgd.pgd >> 32);
+	else
+		ret =  PVOP_CALL1(pgdval_t, pv_mmu_ops.pgd_val,
+				  pgd.pgd);
+
+	return ret;
 }
 
-static inline unsigned long long pmd_val(pmd_t x)
+static inline void set_pte(pte_t *ptep, pte_t pte)
 {
-	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pmd_val,
-			  x.pmd, x.pmd >> 32);
+	if (sizeof(pteval_t) > sizeof(long))
+		PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
+			    pte.pte, (u64)pte.pte >> 32);
+	else
+		PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
+			    pte.pte);
 }
 
-static inline unsigned long long pgd_val(pgd_t x)
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+			      pte_t *ptep, pte_t pte)
 {
-	return PVOP_CALL2(unsigned long long, pv_mmu_ops.pgd_val,
-			  x.pgd, x.pgd >> 32);
+	if (sizeof(pteval_t) > sizeof(long))
+		/* 5 arg words */
+		pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
+	else
+		PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
 }
 
-static inline void set_pte(pte_t *ptep, pte_t pteval)
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
 {
-	PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
+	pmdval_t val = native_pmd_val(pmd);
+
+	if (sizeof(pmdval_t) > sizeof(long))
+		PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
+	else
+		PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
 }
 
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-			      pte_t *ptep, pte_t pteval)
+#if PAGETABLE_LEVELS >= 3
+static inline pmd_t __pmd(pmdval_t val)
 {
-	/* 5 arg words */
-	pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
+	pmdval_t ret;
+
+	if (sizeof(pmdval_t) > sizeof(long))
+		ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd,
+				 val, (u64)val >> 32);
+	else
+		ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.make_pmd,
+				 val);
+
+	return (pmd_t) { ret };
 }
 
-static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
+static inline pmdval_t pmd_val(pmd_t pmd)
 {
-	PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
-		    pteval.pte_low, pteval.pte_high);
+	pmdval_t ret;
+
+	if (sizeof(pmdval_t) > sizeof(long))
+		ret =  PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val,
+				  pmd.pmd, (u64)pmd.pmd >> 32);
+	else
+		ret =  PVOP_CALL1(pmdval_t, pv_mmu_ops.pmd_val,
+				  pmd.pmd);
+
+	return ret;
 }
 
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
-				   pte_t *ptep, pte_t pte)
+static inline void set_pud(pud_t *pudp, pud_t pud)
 {
-	/* 5 arg words */
-	pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
+	pudval_t val = native_pud_val(pud);
+
+	if (sizeof(pudval_t) > sizeof(long))
+		PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
+			    val, (u64)val >> 32);
+	else
+		PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
+			    val);
 }
+#if PAGETABLE_LEVELS == 4
+static inline pud_t __pud(pudval_t val)
+{
+	pudval_t ret;
+
+	if (sizeof(pudval_t) > sizeof(long))
+		ret = PVOP_CALL2(pudval_t, pv_mmu_ops.make_pud,
+				 val, (u64)val >> 32);
+	else
+		ret = PVOP_CALL1(pudval_t, pv_mmu_ops.make_pud,
+				 val);
 
-static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
+	return (pud_t) { ret };
+}
+
+static inline pudval_t pud_val(pud_t pud)
 {
-	PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
-		    pmdval.pmd, pmdval.pmd >> 32);
+	pudval_t ret;
+
+	if (sizeof(pudval_t) > sizeof(long))
+		ret =  PVOP_CALL2(pudval_t, pv_mmu_ops.pud_val,
+				  pud.pud, (u64)pud.pud >> 32);
+	else
+		ret =  PVOP_CALL1(pudval_t, pv_mmu_ops.pud_val,
+				  pud.pud);
+
+	return ret;
 }
 
-static inline void set_pud(pud_t *pudp, pud_t pudval)
+static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
 {
-	PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
-		    pudval.pgd.pgd, pudval.pgd.pgd >> 32);
+	pgdval_t val = native_pgd_val(pgd);
+
+	if (sizeof(pgdval_t) > sizeof(long))
+		PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp,
+			    val, (u64)val >> 32);
+	else
+		PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp,
+			    val);
 }
 
-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+static inline void pgd_clear(pgd_t *pgdp)
 {
-	PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
+	set_pgd(pgdp, __pgd(0));
 }
 
-static inline void pmd_clear(pmd_t *pmdp)
+static inline void pud_clear(pud_t *pudp)
 {
-	PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
+	set_pud(pudp, __pud(0));
 }
 
-#else  /* !CONFIG_X86_PAE */
+#endif	/* PAGETABLE_LEVELS == 4 */
+
+#endif	/* PAGETABLE_LEVELS >= 3 */
 
-static inline pte_t __pte(unsigned long val)
+#ifdef CONFIG_X86_PAE
+/* Special-case pte-setting operations for PAE, which can't update a
+   64-bit pte atomically */
+static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
 {
-	return (pte_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pte, val) };
+	PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
+		    pte.pte, pte.pte >> 32);
 }
 
-static inline pgd_t __pgd(unsigned long val)
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+				   pte_t *ptep, pte_t pte)
 {
-	return (pgd_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pgd, val) };
+	/* 5 arg words */
+	pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
 }
 
-static inline unsigned long pte_val(pte_t x)
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+			     pte_t *ptep)
 {
-	return PVOP_CALL1(unsigned long, pv_mmu_ops.pte_val, x.pte_low);
+	PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
 }
 
-static inline unsigned long pgd_val(pgd_t x)
+static inline void pmd_clear(pmd_t *pmdp)
+{
+	PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
+}
+#else  /* !CONFIG_X86_PAE */
+static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
 {
-	return PVOP_CALL1(unsigned long, pv_mmu_ops.pgd_val, x.pgd);
+	set_pte(ptep, pte);
 }
 
-static inline void set_pte(pte_t *ptep, pte_t pteval)
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+				   pte_t *ptep, pte_t pte)
 {
-	PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
+	set_pte(ptep, pte);
 }
 
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-			      pte_t *ptep, pte_t pteval)
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+			     pte_t *ptep)
 {
-	PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
+	set_pte_at(mm, addr, ptep, __pte(0));
 }
 
-static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
+static inline void pmd_clear(pmd_t *pmdp)
 {
-	PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
+	set_pmd(pmdp, __pmd(0));
 }
 #endif	/* CONFIG_X86_PAE */