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Message-Id: <20200716034122.5998-10-sean.j.christopherson@intel.com>
Date: Wed, 15 Jul 2020 20:41:22 -0700
From: Sean Christopherson <sean.j.christopherson@...el.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: Sean Christopherson <sean.j.christopherson@...el.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 9/9] KVM: x86: Specify max TDP level via kvm_configure_mmu()
Capture the max TDP level during kvm_configure_mmu() instead of using a
kvm_x86_ops hook to do it at every vCPU creation.
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
arch/x86/include/asm/kvm_host.h | 4 ++--
arch/x86/kvm/mmu/mmu.c | 9 ++++++---
arch/x86/kvm/svm/svm.c | 3 +--
arch/x86/kvm/vmx/vmx.c | 3 +--
arch/x86/kvm/x86.c | 1 -
5 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index ffd45b68e1d46..5ab3af7275d81 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1133,7 +1133,6 @@ struct kvm_x86_ops {
int (*sync_pir_to_irr)(struct kvm_vcpu *vcpu);
int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
int (*set_identity_map_addr)(struct kvm *kvm, u64 ident_addr);
- int (*get_max_tdp_level)(void);
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, unsigned long pgd,
@@ -1509,7 +1508,8 @@ void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid);
void kvm_mmu_new_pgd(struct kvm_vcpu *vcpu, gpa_t new_pgd, bool skip_tlb_flush,
bool skip_mmu_sync);
-void kvm_configure_mmu(bool enable_tdp, int tdp_page_level);
+void kvm_configure_mmu(bool enable_tdp, int tdp_max_root_level,
+ int tdp_huge_page_level);
static inline u16 kvm_read_ldt(void)
{
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c867b35759ab5..862bf418214e2 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -93,6 +93,7 @@ module_param_named(flush_on_reuse, force_flush_and_sync_on_reuse, bool, 0644);
bool tdp_enabled = false;
static int max_huge_page_level __read_mostly;
+static int max_tdp_level __read_mostly;
enum {
AUDIT_PRE_PAGE_FAULT,
@@ -4849,10 +4850,10 @@ static union kvm_mmu_role kvm_calc_mmu_role_common(struct kvm_vcpu *vcpu,
static inline int kvm_mmu_get_tdp_level(struct kvm_vcpu *vcpu)
{
/* Use 5-level TDP if and only if it's useful/necessary. */
- if (vcpu->arch.max_tdp_level == 5 && cpuid_maxphyaddr(vcpu) <= 48)
+ if (max_tdp_level == 5 && cpuid_maxphyaddr(vcpu) <= 48)
return 4;
- return vcpu->arch.max_tdp_level;
+ return max_tdp_level;
}
static union kvm_mmu_role
@@ -5580,9 +5581,11 @@ void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid)
}
EXPORT_SYMBOL_GPL(kvm_mmu_invpcid_gva);
-void kvm_configure_mmu(bool enable_tdp, int tdp_huge_page_level)
+void kvm_configure_mmu(bool enable_tdp, int tdp_max_root_level,
+ int tdp_huge_page_level)
{
tdp_enabled = enable_tdp;
+ max_tdp_level = tdp_max_root_level;
/*
* max_huge_page_level reflects KVM's MMU capabilities irrespective
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index c94faca46e760..5f47b44c5c324 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -885,7 +885,7 @@ static __init int svm_hardware_setup(void)
if (npt_enabled && !npt)
npt_enabled = false;
- kvm_configure_mmu(npt_enabled, PG_LEVEL_1G);
+ kvm_configure_mmu(npt_enabled, get_max_npt_level(), PG_LEVEL_1G);
pr_info("kvm: Nested Paging %sabled\n", npt_enabled ? "en" : "dis");
if (nrips) {
@@ -4109,7 +4109,6 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.set_tss_addr = svm_set_tss_addr,
.set_identity_map_addr = svm_set_identity_map_addr,
- .get_max_tdp_level = get_max_npt_level,
.get_mt_mask = svm_get_mt_mask,
.get_exit_info = svm_get_exit_info,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c0b1c7bd1248a..a70d8f6d8aba7 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7959,7 +7959,6 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.set_tss_addr = vmx_set_tss_addr,
.set_identity_map_addr = vmx_set_identity_map_addr,
- .get_max_tdp_level = vmx_get_max_tdp_level,
.get_mt_mask = vmx_get_mt_mask,
.get_exit_info = vmx_get_exit_info,
@@ -8110,7 +8109,7 @@ static __init int hardware_setup(void)
ept_lpage_level = PG_LEVEL_2M;
else
ept_lpage_level = PG_LEVEL_4K;
- kvm_configure_mmu(enable_ept, ept_lpage_level);
+ kvm_configure_mmu(enable_ept, vmx_get_max_tdp_level(), ept_lpage_level);
/*
* Only enable PML when hardware supports PML feature, and both EPT
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6b8347d703430..831179adedaa9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9520,7 +9520,6 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
fx_init(vcpu);
vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
- vcpu->arch.max_tdp_level = kvm_x86_ops.get_max_tdp_level();
vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT;
--
2.26.0
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