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KVM: make EFER_RESERVED_BITS configurable for architecture code 

This patch give the SVM and VMX implementations the ability to add some bits
the guest can set in its EFER register.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Joerg Roedel 2008-01-31 14:57:37 +01:00 committed by Avi Kivity
parent 0aac03f07b
commit f2b4b7ddf6
2 changed files with 10 additions and 2 deletions
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11
arch/x86/kvm/x86.c
View File

@ -41,7 +41,7 @@
| X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
#define EFER_RESERVED_BITS 0xfffffffffffff2fe
static u64 __read_mostly efer_reserved_bits = 0xfffffffffffff2fe;
#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
@ -428,7 +428,7 @@ static u32 emulated_msrs[] = {
static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
if (efer & EFER_RESERVED_BITS) {
if (efer & efer_reserved_bits) {
printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
efer);
kvm_inject_gp(vcpu, 0);
@ -452,6 +452,13 @@ static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
#endif
void kvm_enable_efer_bits(u64 mask)
{
efer_reserved_bits &= ~mask;
}
EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
/*
* Writes msr value into into the appropriate "register".
* Returns 0 on success, non-0 otherwise.

1
include/asm-x86/kvm_host.h
View File

@ -430,6 +430,7 @@ void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
unsigned long *rflags);
void kvm_enable_efer_bits(u64);
int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);