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Subject[PATCH 09/12] KVM: x86/mmu: Add helper to generate mask of reserved HPA bits
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Add a helper to generate the mask of reserved PA bits in the host.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/mmu/mmu.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index d462db3bc742..86af58294272 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4123,6 +4123,11 @@ static void reset_rsvds_bits_mask_ept(struct kvm_vcpu *vcpu,
vcpu->arch.reserved_gpa_bits, execonly);
}

+static inline u64 reserved_hpa_bits(void)
+{
+ return rsvd_bits(shadow_phys_bits, 63);
+}
+
/*
* the page table on host is the shadow page table for the page
* table in guest or amd nested guest, its mmu features completely
@@ -4142,7 +4147,7 @@ reset_shadow_zero_bits_mask(struct kvm_vcpu *vcpu, struct kvm_mmu *context)
*/
shadow_zero_check = &context->shadow_zero_check;
__reset_rsvds_bits_mask(vcpu, shadow_zero_check,
- rsvd_bits(shadow_phys_bits, 63),
+ reserved_hpa_bits(),
context->shadow_root_level, uses_nx,
guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES),
is_pse(vcpu), true);
@@ -4179,14 +4184,13 @@ reset_tdp_shadow_zero_bits_mask(struct kvm_vcpu *vcpu,

if (boot_cpu_is_amd())
__reset_rsvds_bits_mask(vcpu, shadow_zero_check,
- rsvd_bits(shadow_phys_bits, 63),
+ reserved_hpa_bits(),
context->shadow_root_level, false,
boot_cpu_has(X86_FEATURE_GBPAGES),
true, true);
else
__reset_rsvds_bits_mask_ept(shadow_zero_check,
- rsvd_bits(shadow_phys_bits, 63),
- false);
+ reserved_hpa_bits(), false);

if (!shadow_me_mask)
return;
@@ -4206,7 +4210,7 @@ reset_ept_shadow_zero_bits_mask(struct kvm_vcpu *vcpu,
struct kvm_mmu *context, bool execonly)
{
__reset_rsvds_bits_mask_ept(&context->shadow_zero_check,
- rsvd_bits(shadow_phys_bits, 63), execonly);
+ reserved_hpa_bits(), execonly);
}

#define BYTE_MASK(access) \
--
2.30.0.365.g02bc693789-goog
\
 
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