This copies any general purpose guest registers maintained by the hardware
to the vcpu structure (and back).
Signed-off-by: Avi Kivity <[email protected]>
Index: linux-2.6/drivers/kvm/kvm.h
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm.h
+++ linux-2.6/drivers/kvm/kvm.h
@@ -262,6 +262,8 @@ struct kvm_arch_ops {
void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
+ void (*cache_regs)(struct kvm_vcpu *vcpu);
+ void (*decache_regs)(struct kvm_vcpu *vcpu);
};
extern struct kvm_stat kvm_stat;
Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -1327,26 +1327,6 @@ out:
}
/*
- * Sync the rsp and rip registers into the vcpu structure. This allows
- * registers to be accessed by indexing vcpu->regs.
- */
-static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
-{
- vcpu->regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
- vcpu->rip = vmcs_readl(GUEST_RIP);
-}
-
-/*
- * Syncs rsp and rip back into the vmcs. Should be called after possible
- * modification.
- */
-static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
-{
- vmcs_writel(GUEST_RSP, vcpu->regs[VCPU_REGS_RSP]);
- vmcs_writel(GUEST_RIP, vcpu->rip);
-}
-
-/*
* Creates some virtual cpus. Good luck creating more than one.
*/
static int kvm_dev_ioctl_create_vcpu(struct kvm *kvm, int n)
@@ -1819,7 +1799,7 @@ static int emulate_instruction(struct kv
int r;
u32 cs_ar;
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
cs_ar = vmcs_read32(GUEST_CS_AR_BYTES);
@@ -1864,7 +1844,7 @@ static int emulate_instruction(struct kv
return EMULATE_DO_MMIO;
}
- vcpu_put_rsp_rip(vcpu);
+ kvm_arch_ops->decache_regs(vcpu);
vmcs_writel(GUEST_RFLAGS, emulate_ctxt.eflags);
if (vcpu->mmio_is_write)
@@ -2134,22 +2114,22 @@ static int handle_cr(struct kvm_vcpu *vc
case 0: /* mov to cr */
switch (cr) {
case 0:
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
set_cr0(vcpu, vcpu->regs[reg]);
skip_emulated_instruction(vcpu);
return 1;
case 3:
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
set_cr3(vcpu, vcpu->regs[reg]);
skip_emulated_instruction(vcpu);
return 1;
case 4:
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
set_cr4(vcpu, vcpu->regs[reg]);
skip_emulated_instruction(vcpu);
return 1;
case 8:
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
set_cr8(vcpu, vcpu->regs[reg]);
skip_emulated_instruction(vcpu);
return 1;
@@ -2158,17 +2138,17 @@ static int handle_cr(struct kvm_vcpu *vc
case 1: /*mov from cr*/
switch (cr) {
case 3:
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
vcpu->regs[reg] = vcpu->cr3;
- vcpu_put_rsp_rip(vcpu);
+ kvm_arch_ops->decache_regs(vcpu);
skip_emulated_instruction(vcpu);
return 1;
case 8:
printk(KERN_DEBUG "handle_cr: read CR8 "
"cpu erratum AA15\n");
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
vcpu->regs[reg] = vcpu->cr8;
- vcpu_put_rsp_rip(vcpu);
+ kvm_arch_ops->decache_regs(vcpu);
skip_emulated_instruction(vcpu);
return 1;
}
@@ -2200,7 +2180,7 @@ static int handle_dr(struct kvm_vcpu *vc
exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
dr = exit_qualification & 7;
reg = (exit_qualification >> 8) & 15;
- vcpu_load_rsp_rip(vcpu);
+ kvm_arch_ops->cache_regs(vcpu);
if (exit_qualification & 16) {
/* mov from dr */
switch (dr) {
@@ -2217,7 +2197,7 @@ static int handle_dr(struct kvm_vcpu *vc
} else {
/* mov to dr */
}
- vcpu_put_rsp_rip(vcpu);
+ kvm_arch_ops->decache_regs(vcpu);
skip_emulated_instruction(vcpu);
return 1;
}
Index: linux-2.6/drivers/kvm/vmx.c
===================================================================
--- linux-2.6.orig/drivers/kvm/vmx.c
+++ linux-2.6/drivers/kvm/vmx.c
@@ -180,6 +180,26 @@ static int vmx_set_msr(struct kvm_vcpu *
return 0;
}
+/*
+ * Sync the rsp and rip registers into the vcpu structure. This allows
+ * registers to be accessed by indexing vcpu->regs.
+ */
+static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
+{
+ vcpu->regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
+ vcpu->rip = vmcs_readl(GUEST_RIP);
+}
+
+/*
+ * Syncs rsp and rip back into the vmcs. Should be called after possible
+ * modification.
+ */
+static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
+{
+ vmcs_writel(GUEST_RSP, vcpu->regs[VCPU_REGS_RSP]);
+ vmcs_writel(GUEST_RIP, vcpu->rip);
+}
+
static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
{
unsigned long dr7 = 0x400;
@@ -405,6 +425,8 @@ static struct kvm_arch_ops vmx_arch_ops
.set_idt = vmx_set_idt,
.get_gdt = vmx_get_gdt,
.set_gdt = vmx_set_gdt,
+ .cache_regs = vcpu_load_rsp_rip,
+ .decache_regs = vcpu_put_rsp_rip,
};
static int __init vmx_init(void)
-
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