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KVM: x86: Reverse the polarity of efer_reserved_bits

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In preparation for moving efer_reserved_bits into kvm_caps, reverse its
polarity and make it efer_supported_bits, to be more consistent with
other fields in kvm_caps.

No functional change intended.

Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Signed-off-by: Yosry Ahmed <yosry@kernel.org>
Link: https://patch.msgid.link/20260713181020.2735367-5-yosry@kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Yosry Ahmed 2026-07-13 18:10:19 +00:00 committed by Sean Christopherson
parent a4b8acd428
commit 37352c4fbd
1 changed files with 5 additions and 5 deletions
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10
arch/x86/kvm/msrs.c
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@ -19,7 +19,7 @@ bool __read_mostly report_ignored_msrs = true;
module_param(report_ignored_msrs, bool, 0644);
EXPORT_SYMBOL_FOR_KVM_INTERNAL(report_ignored_msrs);
static u64 __read_mostly efer_reserved_bits;
static u64 __read_mostly efer_supported_bits;
#define MAX_IO_MSRS 256
@ -605,7 +605,7 @@ static bool __kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer)
}
bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer)
{
if (efer & efer_reserved_bits)
if (efer & ~efer_supported_bits)
return false;
return __kvm_valid_efer(vcpu, efer);
@ -618,7 +618,7 @@ static int set_efer(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
u64 efer = msr_info->data;
int r;
if (efer & efer_reserved_bits)
if (efer & ~efer_supported_bits)
return 1;
if (!msr_info->host_initiated) {
@ -652,13 +652,13 @@ static int set_efer(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
void kvm_init_efer_bits(void)
{
/* Enable syscall by default because its emulated by KVM */
efer_reserved_bits = ~((u64)EFER_SCE);
efer_supported_bits = (u64)EFER_SCE;
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_init_efer_bits);
void kvm_enable_efer_bits(u64 mask)
{
efer_reserved_bits &= ~mask;
efer_supported_bits |= mask;
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_enable_efer_bits);