[PATCH v6 27/31] KVM: nSVM: Use PAGE_MASK to drop lower bits of bitmap GPAs from vmcb12

[Yosry Ahmed]

Use PAGE_MASK to drop the lower bits from IOPM_BASE_PA and MSRPM_BASE_PA
while copying them instead of dropping the bits afterward with a
hardcoded mask.

No functional change intended.

Signed-off-by: Yosry Ahmed <yosry@xxxxxxxxxx>
---
 arch/x86/kvm/svm/nested.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 5c8449bc6fa0c..28a8bfc632ef5 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -499,8 +499,8 @@ void __nested_copy_vmcb_control_to_cache(struct kvm_vcpu *vcpu,
 	if (!guest_cpu_cap_has(vcpu, X86_FEATURE_NPT))
 		to->misc_ctl &= ~SVM_MISC_ENABLE_NP;
 
-	to->iopm_base_pa        = from->iopm_base_pa;
-	to->msrpm_base_pa       = from->msrpm_base_pa;
+	to->iopm_base_pa        = from->iopm_base_pa & PAGE_MASK;
+	to->msrpm_base_pa       = from->msrpm_base_pa & PAGE_MASK;
 	to->tsc_offset          = from->tsc_offset;
 	to->tlb_ctl             = from->tlb_ctl;
 	to->erap_ctl            = from->erap_ctl;
@@ -522,8 +522,6 @@ void __nested_copy_vmcb_control_to_cache(struct kvm_vcpu *vcpu,
 
 	/* Copy asid here because nested_vmcb_check_controls() will check it */
 	to->asid           = from->asid;
-	to->msrpm_base_pa &= ~0x0fffULL;
-	to->iopm_base_pa  &= ~0x0fffULL;
 
 #ifdef CONFIG_KVM_HYPERV
 	/* Hyper-V extensions (Enlightened VMCB) */
-- 
2.53.0.414.gf7e9f6c205-goog