[PATCH v3 10/31] KVM: MMU: change kvm_tdp_mmu_map() arguments to kvm_page_fault

From: Paolo Bonzini
Date: Fri Sep 24 2021 - 12:32:47 EST


Pass struct kvm_page_fault to kvm_tdp_mmu_map() instead of
extracting the arguments from the struct.

Suggested-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
arch/x86/kvm/mmu/mmu.c | 3 +--
arch/x86/kvm/mmu/tdp_mmu.c | 23 +++++++++--------------
arch/x86/kvm/mmu/tdp_mmu.h | 4 +---
3 files changed, 11 insertions(+), 19 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c84e978d76b0..b2020b481db2 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3988,8 +3988,7 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
goto out_unlock;

if (is_tdp_mmu_fault)
- r = kvm_tdp_mmu_map(vcpu, gpa, error_code, fault->map_writable, fault->max_level,
- fault->pfn, fault->prefault);
+ r = kvm_tdp_mmu_map(vcpu, fault);
else
r = __direct_map(vcpu, fault);

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 7a5a24ca50e4..4a5bb0b5b639 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -985,35 +985,30 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, int write,
* Handle a TDP page fault (NPT/EPT violation/misconfiguration) by installing
* page tables and SPTEs to translate the faulting guest physical address.
*/
-int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
- int map_writable, int max_level, kvm_pfn_t pfn,
- bool prefault)
+int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
{
bool nx_huge_page_workaround_enabled = is_nx_huge_page_enabled();
- bool write = error_code & PFERR_WRITE_MASK;
- bool exec = error_code & PFERR_FETCH_MASK;
- bool huge_page_disallowed = exec && nx_huge_page_workaround_enabled;
+ bool huge_page_disallowed = fault->exec && nx_huge_page_workaround_enabled;
struct kvm_mmu *mmu = vcpu->arch.mmu;
struct tdp_iter iter;
struct kvm_mmu_page *sp;
u64 *child_pt;
u64 new_spte;
int ret;
- gfn_t gfn = gpa >> PAGE_SHIFT;
int level;
int req_level;

- level = kvm_mmu_hugepage_adjust(vcpu, gfn, max_level, &pfn,
+ level = kvm_mmu_hugepage_adjust(vcpu, fault->gfn, fault->max_level, &fault->pfn,
huge_page_disallowed, &req_level);

- trace_kvm_mmu_spte_requested(gpa, level, pfn);
+ trace_kvm_mmu_spte_requested(fault->addr, level, fault->pfn);

rcu_read_lock();

- tdp_mmu_for_each_pte(iter, mmu, gfn, gfn + 1) {
+ tdp_mmu_for_each_pte(iter, mmu, fault->gfn, fault->gfn + 1) {
if (nx_huge_page_workaround_enabled)
- disallowed_hugepage_adjust(iter.old_spte, gfn,
- iter.level, &pfn, &level);
+ disallowed_hugepage_adjust(iter.old_spte, fault->gfn,
+ iter.level, &fault->pfn, &level);

if (iter.level == level)
break;
@@ -1069,8 +1064,8 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
return RET_PF_RETRY;
}

- ret = tdp_mmu_map_handle_target_level(vcpu, write, map_writable, &iter,
- pfn, prefault);
+ ret = tdp_mmu_map_handle_target_level(vcpu, fault->write, fault->map_writable, &iter,
+ fault->pfn, fault->prefault);
rcu_read_unlock();

return ret;
diff --git a/arch/x86/kvm/mmu/tdp_mmu.h b/arch/x86/kvm/mmu/tdp_mmu.h
index 358f447d4012..ceaf7ff3ca7c 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.h
+++ b/arch/x86/kvm/mmu/tdp_mmu.h
@@ -48,9 +48,7 @@ void kvm_tdp_mmu_zap_all(struct kvm *kvm);
void kvm_tdp_mmu_invalidate_all_roots(struct kvm *kvm);
void kvm_tdp_mmu_zap_invalidated_roots(struct kvm *kvm);

-int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
- int map_writable, int max_level, kvm_pfn_t pfn,
- bool prefault);
+int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);

bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
bool flush);
--
2.27.0