From fa4b558802c0ed4ef8132c1b2d1e993c519eb0ae Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Tue, 22 Jun 2021 10:57:26 -0700 Subject: [PATCH] KVM: x86/mmu: Consolidate reset_rsvds_bits_mask() calls Move calls to reset_rsvds_bits_mask() out of the various mode statements and under a more generic CR0.PG=1 check. This will allow for additional code consolidation in the future. No functional change intended. Signed-off-by: Sean Christopherson Message-Id: <20210622175739.3610207-42-seanjc@google.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/mmu/mmu.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index b5e63c4..9a06003 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4637,18 +4637,18 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu) } else if (is_long_mode(vcpu)) { context->root_level = ____is_cr4_la57(®s) ? PT64_ROOT_5LEVEL : PT64_ROOT_4LEVEL; - reset_rsvds_bits_mask(vcpu, context); context->gva_to_gpa = paging64_gva_to_gpa; } else if (is_pae(vcpu)) { context->root_level = PT32E_ROOT_LEVEL; - reset_rsvds_bits_mask(vcpu, context); context->gva_to_gpa = paging64_gva_to_gpa; } else { context->root_level = PT32_ROOT_LEVEL; - reset_rsvds_bits_mask(vcpu, context); context->gva_to_gpa = paging32_gva_to_gpa; } + if (is_cr0_pg(context)) + reset_rsvds_bits_mask(vcpu, context); + update_permission_bitmask(context, false); update_pkru_bitmask(context); update_last_nonleaf_level(context); @@ -4890,18 +4890,17 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu) * nested page tables as the second level of translation. Basically * the gva_to_gpa functions between mmu and nested_mmu are swapped. */ - if (!is_paging(vcpu)) { + if (!is_paging(vcpu)) g_context->gva_to_gpa = nonpaging_gva_to_gpa_nested; - } else if (is_long_mode(vcpu)) { - reset_rsvds_bits_mask(vcpu, g_context); + else if (is_long_mode(vcpu)) g_context->gva_to_gpa = paging64_gva_to_gpa_nested; - } else if (is_pae(vcpu)) { - reset_rsvds_bits_mask(vcpu, g_context); + else if (is_pae(vcpu)) g_context->gva_to_gpa = paging64_gva_to_gpa_nested; - } else { - reset_rsvds_bits_mask(vcpu, g_context); + else g_context->gva_to_gpa = paging32_gva_to_gpa_nested; - } + + if (is_cr0_pg(g_context)) + reset_rsvds_bits_mask(vcpu, g_context); update_permission_bitmask(g_context, false); update_pkru_bitmask(g_context); -- 2.7.4