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Subject[PATCH v3 6/7] KVM: x86/mmu: Rename kvm_mmu->get_cr3() to ->get_guest_pgd()
Date
Rename kvm_mmu->get_cr3() to call out that it is retrieving a guest
value, as opposed to kvm_mmu->set_cr3(), which sets a host value, and to
note that it will return something other than CR3 when nested EPT is in
use. Hopefully the new name will also make it more obvious that L1's
nested_cr3 is returned in SVM's nested NPT case.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu/mmu.c | 12 ++++++------
arch/x86/kvm/mmu/paging_tmpl.h | 2 +-
arch/x86/kvm/svm.c | 2 +-
arch/x86/kvm/vmx/nested.c | 2 +-
arch/x86/kvm/x86.c | 2 +-
6 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index fe1f786561e3..aca19ef1d4a1 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -382,7 +382,7 @@ struct kvm_mmu_root_info {
*/
struct kvm_mmu {
void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
- unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
+ unsigned long (*get_guest_pgd)(struct kvm_vcpu *vcpu);
u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
int (*page_fault)(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 err,
bool prefault);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 4bd94aeefb4a..f72a854edcd3 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3719,7 +3719,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
vcpu->arch.mmu->root_hpa = __pa(vcpu->arch.mmu->pae_root);
} else
BUG();
- vcpu->arch.mmu->root_cr3 = vcpu->arch.mmu->get_cr3(vcpu);
+ vcpu->arch.mmu->root_cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);

return 0;
}
@@ -3731,7 +3731,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
gfn_t root_gfn, root_cr3;
int i;

- root_cr3 = vcpu->arch.mmu->get_cr3(vcpu);
+ root_cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);
root_gfn = root_cr3 >> PAGE_SHIFT;

if (mmu_check_root(vcpu, root_gfn))
@@ -4068,7 +4068,7 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
arch.token = (vcpu->arch.apf.id++ << 12) | vcpu->vcpu_id;
arch.gfn = gfn;
arch.direct_map = vcpu->arch.mmu->direct_map;
- arch.cr3 = vcpu->arch.mmu->get_cr3(vcpu);
+ arch.cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);

return kvm_setup_async_pf(vcpu, cr2_or_gpa,
kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch);
@@ -4918,7 +4918,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->shadow_root_level = kvm_x86_ops->get_tdp_level(vcpu);
context->direct_map = true;
context->set_cr3 = kvm_x86_ops->set_tdp_cr3;
- context->get_cr3 = get_cr3;
+ context->get_guest_pgd = get_cr3;
context->get_pdptr = kvm_pdptr_read;
context->inject_page_fault = kvm_inject_page_fault;

@@ -5065,7 +5065,7 @@ static void init_kvm_softmmu(struct kvm_vcpu *vcpu)

kvm_init_shadow_mmu(vcpu);
context->set_cr3 = kvm_x86_ops->set_cr3;
- context->get_cr3 = get_cr3;
+ context->get_guest_pgd = get_cr3;
context->get_pdptr = kvm_pdptr_read;
context->inject_page_fault = kvm_inject_page_fault;
}
@@ -5079,7 +5079,7 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu)
return;

g_context->mmu_role.as_u64 = new_role.as_u64;
- g_context->get_cr3 = get_cr3;
+ g_context->get_guest_pgd = get_cr3;
g_context->get_pdptr = kvm_pdptr_read;
g_context->inject_page_fault = kvm_inject_page_fault;

diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 6b15b58f3ecc..1ddbfff64ccc 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -333,7 +333,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
trace_kvm_mmu_pagetable_walk(addr, access);
retry_walk:
walker->level = mmu->root_level;
- pte = mmu->get_cr3(vcpu);
+ pte = mmu->get_guest_pgd(vcpu);
have_ad = PT_HAVE_ACCESSED_DIRTY(mmu);

#if PTTYPE == 64
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index fd3fc9fbefff..30f474dd9462 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3012,7 +3012,7 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
vcpu->arch.mmu = &vcpu->arch.guest_mmu;
kvm_init_shadow_mmu(vcpu);
vcpu->arch.mmu->set_cr3 = nested_svm_set_tdp_cr3;
- vcpu->arch.mmu->get_cr3 = nested_svm_get_tdp_cr3;
+ vcpu->arch.mmu->get_guest_pgd = nested_svm_get_tdp_cr3;
vcpu->arch.mmu->get_pdptr = nested_svm_get_tdp_pdptr;
vcpu->arch.mmu->inject_page_fault = nested_svm_inject_npf_exit;
vcpu->arch.mmu->shadow_root_level = get_npt_level(vcpu);
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index e545a40b93c8..c6163f1b2517 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -355,7 +355,7 @@ static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu)
nested_ept_ad_enabled(vcpu),
nested_ept_get_eptp(vcpu));
vcpu->arch.mmu->set_cr3 = vmx_set_cr3;
- vcpu->arch.mmu->get_cr3 = nested_ept_get_eptp;
+ vcpu->arch.mmu->get_guest_pgd = nested_ept_get_eptp;
vcpu->arch.mmu->inject_page_fault = nested_ept_inject_page_fault;
vcpu->arch.mmu->get_pdptr = kvm_pdptr_read;

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ddd1d296bd20..cbce1c1b18a0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10153,7 +10153,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
return;

if (!vcpu->arch.mmu->direct_map &&
- work->arch.cr3 != vcpu->arch.mmu->get_cr3(vcpu))
+ work->arch.cr3 != vcpu->arch.mmu->get_guest_pgd(vcpu))
return;

kvm_mmu_do_page_fault(vcpu, work->cr2_or_gpa, 0, true);
--
2.24.1
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