diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-01-31 14:57:37 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:18 +0300 |
| commit | f2b4b7ddf633ffa24ce7c89c9e0d8a06463484e3 (patch) | |
| tree | db27a5a3cff2e60497ec60194a9f754372bf01e1 /arch | |
| parent | 0aac03f07b37da96e00371e66973d5ffaae578a4 (diff) | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 6b01552bd1f..ec9265b354b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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. |