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Message-ID: <Yf2BY7d8TsmNrceY@google.com>
Date: Fri, 4 Feb 2022 19:41:23 +0000
From: David Matlack <dmatlack@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
seanjc@...gle.com, vkuznets@...hat.com
Subject: Re: [PATCH 09/23] KVM: MMU: remove "bool base_only" arguments
On Fri, Feb 04, 2022 at 06:57:04AM -0500, Paolo Bonzini wrote:
> The argument is always false now that kvm_mmu_calc_root_page_role has
> been removed.
>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Reviewed-by: David Matlack <dmatlack@...gle.com>
> ---
> arch/x86/kvm/mmu/mmu.c | 63 +++++++++++++++---------------------------
> 1 file changed, 22 insertions(+), 41 deletions(-)
>
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 42475e4c2a48..dd69cfc8c4f6 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -4658,46 +4658,30 @@ static void paging32_init_context(struct kvm_mmu *context)
> context->direct_map = false;
> }
>
> -static union kvm_mmu_extended_role kvm_calc_mmu_role_ext(struct kvm_vcpu *vcpu,
> - const struct kvm_mmu_role_regs *regs)
> -{
> - union kvm_mmu_extended_role ext = {0};
> -
> - if (____is_cr0_pg(regs)) {
> - ext.cr0_pg = 1;
> - ext.cr4_pae = ____is_cr4_pae(regs);
> - ext.cr4_smep = ____is_cr4_smep(regs);
> - ext.cr4_smap = ____is_cr4_smap(regs);
> - ext.cr4_pse = ____is_cr4_pse(regs);
> -
> - /* PKEY and LA57 are active iff long mode is active. */
> - ext.cr4_pke = ____is_efer_lma(regs) && ____is_cr4_pke(regs);
> - ext.cr4_la57 = ____is_efer_lma(regs) && ____is_cr4_la57(regs);
> - ext.efer_lma = ____is_efer_lma(regs);
> - }
> -
> - return ext;
> -}
> -
> static union kvm_mmu_role kvm_calc_mmu_role_common(struct kvm_vcpu *vcpu,
> - const struct kvm_mmu_role_regs *regs,
> - bool base_only)
> + const struct kvm_mmu_role_regs *regs)
> {
> union kvm_mmu_role role = {0};
>
> role.base.access = ACC_ALL;
> if (____is_cr0_pg(regs)) {
> + role.ext.cr0_pg = 1;
> role.base.efer_nx = ____is_efer_nx(regs);
> role.base.cr0_wp = ____is_cr0_wp(regs);
> +
> + role.ext.cr4_pae = ____is_cr4_pae(regs);
> + role.ext.cr4_smep = ____is_cr4_smep(regs);
> + role.ext.cr4_smap = ____is_cr4_smap(regs);
> + role.ext.cr4_pse = ____is_cr4_pse(regs);
> +
> + /* PKEY and LA57 are active iff long mode is active. */
> + role.ext.cr4_pke = ____is_efer_lma(regs) && ____is_cr4_pke(regs);
> + role.ext.cr4_la57 = ____is_efer_lma(regs) && ____is_cr4_la57(regs);
> + role.ext.efer_lma = ____is_efer_lma(regs);
> }
> role.base.smm = is_smm(vcpu);
> role.base.guest_mode = is_guest_mode(vcpu);
>
> - if (base_only)
> - return role;
> -
> - role.ext = kvm_calc_mmu_role_ext(vcpu, regs);
> -
> return role;
> }
>
> @@ -4716,10 +4700,9 @@ static inline int kvm_mmu_get_tdp_level(struct kvm_vcpu *vcpu)
>
> static union kvm_mmu_role
> kvm_calc_tdp_mmu_root_page_role(struct kvm_vcpu *vcpu,
> - const struct kvm_mmu_role_regs *regs,
> - bool base_only)
> + const struct kvm_mmu_role_regs *regs)
> {
> - union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs, base_only);
> + union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs);
>
> role.base.ad_disabled = (shadow_accessed_mask == 0);
> role.base.level = kvm_mmu_get_tdp_level(vcpu);
> @@ -4734,7 +4717,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu,
> {
> struct kvm_mmu *context = &vcpu->arch.root_mmu;
> union kvm_mmu_role new_role =
> - kvm_calc_tdp_mmu_root_page_role(vcpu, regs, false);
> + kvm_calc_tdp_mmu_root_page_role(vcpu, regs);
>
> if (new_role.as_u64 == context->mmu_role.as_u64)
> return;
> @@ -4763,10 +4746,9 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu,
>
> static union kvm_mmu_role
> kvm_calc_shadow_root_page_role_common(struct kvm_vcpu *vcpu,
> - const struct kvm_mmu_role_regs *regs,
> - bool base_only)
> + const struct kvm_mmu_role_regs *regs)
> {
> - union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs, base_only);
> + union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs);
>
> role.base.smep_andnot_wp = role.ext.cr4_smep && !____is_cr0_wp(regs);
> role.base.smap_andnot_wp = role.ext.cr4_smap && !____is_cr0_wp(regs);
> @@ -4777,11 +4759,10 @@ kvm_calc_shadow_root_page_role_common(struct kvm_vcpu *vcpu,
>
> static union kvm_mmu_role
> kvm_calc_shadow_mmu_root_page_role(struct kvm_vcpu *vcpu,
> - const struct kvm_mmu_role_regs *regs,
> - bool base_only)
> + const struct kvm_mmu_role_regs *regs)
> {
> union kvm_mmu_role role =
> - kvm_calc_shadow_root_page_role_common(vcpu, regs, base_only);
> + kvm_calc_shadow_root_page_role_common(vcpu, regs);
>
> role.base.direct = !____is_cr0_pg(regs);
>
> @@ -4821,7 +4802,7 @@ static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu,
> {
> struct kvm_mmu *context = &vcpu->arch.root_mmu;
> union kvm_mmu_role new_role =
> - kvm_calc_shadow_mmu_root_page_role(vcpu, regs, false);
> + kvm_calc_shadow_mmu_root_page_role(vcpu, regs);
>
> shadow_mmu_init_context(vcpu, context, regs, new_role);
>
> @@ -4841,7 +4822,7 @@ kvm_calc_shadow_npt_root_page_role(struct kvm_vcpu *vcpu,
> const struct kvm_mmu_role_regs *regs)
> {
> union kvm_mmu_role role =
> - kvm_calc_shadow_root_page_role_common(vcpu, regs, false);
> + kvm_calc_shadow_root_page_role_common(vcpu, regs);
>
> role.base.direct = false;
> role.base.level = kvm_mmu_get_tdp_level(vcpu);
> @@ -4937,7 +4918,7 @@ kvm_calc_nested_mmu_role(struct kvm_vcpu *vcpu, const struct kvm_mmu_role_regs *
> {
> union kvm_mmu_role role;
>
> - role = kvm_calc_shadow_root_page_role_common(vcpu, regs, false);
> + role = kvm_calc_shadow_root_page_role_common(vcpu, regs);
>
> /*
> * Nested MMUs are used only for walking L2's gva->gpa, they never have
> --
> 2.31.1
>
>
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