#include <linux/init.h>
#include <linux/pci_ids.h>
#include <linux/pci_regs.h>
+
+#include <asm/apic.h>
#include <asm/pci-direct.h>
#include <asm/io.h>
#include <asm/paravirt.h>
+#include <asm/setup.h>
+#ifdef CONFIG_PARAVIRT
/*
* Interrupt control on vSMPowered systems:
* ~AC is a shadow of IF. If IF is 'on' AC should be 'off'
flags &= ~X86_EFLAGS_IF;
return flags;
}
+PV_CALLEE_SAVE_REGS_THUNK(vsmp_save_fl);
static void vsmp_restore_fl(unsigned long flags)
{
flags |= X86_EFLAGS_AC;
native_restore_fl(flags);
}
+PV_CALLEE_SAVE_REGS_THUNK(vsmp_restore_fl);
static void vsmp_irq_disable(void)
{
native_restore_fl((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
}
+PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_disable);
static void vsmp_irq_enable(void)
{
native_restore_fl((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
}
+PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable);
-static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
+static unsigned __init_or_module vsmp_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
{
switch (type) {
}
-static int vsmp = -1;
-
-int is_vsmp_box(void)
-{
- if (vsmp != -1)
- return vsmp;
-
- vsmp = 0;
- if (!early_pci_allowed())
- return vsmp;
-
- /* Check if we are running on a ScaleMP vSMP box */
- if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) ==
- PCI_VENDOR_ID_SCALEMP) &&
- (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) ==
- PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
- vsmp = 1;
-
- return vsmp;
-}
-
-void __init vsmp_init(void)
+static void __init set_vsmp_pv_ops(void)
{
- void *address;
+ void __iomem *address;
unsigned int cap, ctl, cfg;
- if (!is_vsmp_box())
- return;
-
- if (!early_pci_allowed())
- return;
-
- /* If we are, use the distinguished irq functions */
- pv_irq_ops.irq_disable = vsmp_irq_disable;
- pv_irq_ops.irq_enable = vsmp_irq_enable;
- pv_irq_ops.save_fl = vsmp_save_fl;
- pv_irq_ops.restore_fl = vsmp_restore_fl;
- pv_init_ops.patch = vsmp_patch;
-
/* set vSMP magic bits to indicate vSMP capable kernel */
cfg = read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0);
address = early_ioremap(cfg, 8);
printk(KERN_INFO "vSMP CTL: capabilities:0x%08x control:0x%08x\n",
cap, ctl);
if (cap & ctl & (1 << 4)) {
- /* Turn on vSMP IRQ fastpath handling (see system.h) */
+ /* Setup irq ops and turn on vSMP IRQ fastpath handling */
+ pv_irq_ops.irq_disable = PV_CALLEE_SAVE(vsmp_irq_disable);
+ pv_irq_ops.irq_enable = PV_CALLEE_SAVE(vsmp_irq_enable);
+ pv_irq_ops.save_fl = PV_CALLEE_SAVE(vsmp_save_fl);
+ pv_irq_ops.restore_fl = PV_CALLEE_SAVE(vsmp_restore_fl);
+ pv_init_ops.patch = vsmp_patch;
+
ctl &= ~(1 << 4);
writel(ctl, address + 4);
ctl = readl(address + 4);
}
early_iounmap(address, 8);
+}
+#else
+static void __init set_vsmp_pv_ops(void)
+{
+}
+#endif
+
+static int is_vsmp = -1;
+
+static void __init detect_vsmp_box(void)
+{
+ is_vsmp = 0;
+
+ if (!early_pci_allowed())
+ return;
+
+ /* Check if we are running on a ScaleMP vSMPowered box */
+ if (read_pci_config(0, 0x1f, 0, PCI_VENDOR_ID) ==
+ (PCI_VENDOR_ID_SCALEMP | (PCI_DEVICE_ID_SCALEMP_VSMP_CTL << 16)))
+ is_vsmp = 1;
+}
+
+int is_vsmp_box(void)
+{
+ if (is_vsmp != -1)
+ return is_vsmp;
+ else {
+ WARN_ON_ONCE(1);
+ return 0;
+ }
+}
+
+void __init vsmp_init(void)
+{
+ detect_vsmp_box();
+ if (!is_vsmp_box())
+ return;
+
+ set_vsmp_pv_ops();
return;
}