From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: isaku.yamahata@intel.com, David Matlack <dmatlack@google.com>,
seanjc@google.com, peterx@redhat.com
Subject: [PATCH 06/16] KVM: MMU: change page_fault_handle_page_track() arguments to kvm_page_fault
Date: Sat, 7 Aug 2021 09:49:26 -0400 [thread overview]
Message-ID: <20210807134936.3083984-7-pbonzini@redhat.com> (raw)
In-Reply-To: <20210807134936.3083984-1-pbonzini@redhat.com>
Add fields to struct kvm_page_fault corresponding to the arguments
of page_fault_handle_page_track(). The fields are initialized in the
callers, and page_fault_handle_page_track() receives a struct
kvm_page_fault instead of having to extract the arguments out of it.
Suggested-by: Isaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/mmu.h | 3 +++
arch/x86/kvm/mmu/mmu.c | 18 +++++++++---------
arch/x86/kvm/mmu/paging_tmpl.h | 7 ++++---
3 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 158263847bef..c3d404155ceb 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -132,6 +132,9 @@ struct kvm_page_fault {
/* Input to FNAME(fetch), __direct_map and kvm_tdp_mmu_map. */
u8 max_level;
+
+ /* Shifted addr, or result of guest page table walk if addr is a gva. */
+ gfn_t gfn;
};
int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index e93ee0ebe5ff..3af49678d4f8 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3788,20 +3788,19 @@ static int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr, bool direct)
}
static bool page_fault_handle_page_track(struct kvm_vcpu *vcpu,
- u32 error_code, gfn_t gfn)
+ struct kvm_page_fault *fault)
{
- if (unlikely(error_code & PFERR_RSVD_MASK))
+ if (unlikely(fault->rsvd))
return false;
- if (!(error_code & PFERR_PRESENT_MASK) ||
- !(error_code & PFERR_WRITE_MASK))
+ if (!fault->present || !fault->write)
return false;
/*
* guest is writing the page which is write tracked which can
* not be fixed by page fault handler.
*/
- if (kvm_page_track_is_active(vcpu, gfn, KVM_PAGE_TRACK_WRITE))
+ if (kvm_page_track_is_active(vcpu, fault->gfn, KVM_PAGE_TRACK_WRITE))
return true;
return false;
@@ -3885,13 +3884,13 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
bool is_tdp_mmu_fault = is_tdp_mmu(vcpu->arch.mmu);
bool map_writable;
- gfn_t gfn = gpa >> PAGE_SHIFT;
unsigned long mmu_seq;
kvm_pfn_t pfn;
hva_t hva;
int r;
- if (page_fault_handle_page_track(vcpu, error_code, gfn))
+ fault->gfn = gpa >> PAGE_SHIFT;
+ if (page_fault_handle_page_track(vcpu, fault))
return RET_PF_EMULATE;
r = fast_page_fault(vcpu, gpa, error_code);
@@ -3905,11 +3904,12 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
mmu_seq = vcpu->kvm->mmu_notifier_seq;
smp_rmb();
- if (try_async_pf(vcpu, fault->prefault, gfn, gpa, &pfn, &hva,
+ if (try_async_pf(vcpu, fault->prefault, fault->gfn, gpa, &pfn, &hva,
fault->write, &map_writable))
return RET_PF_RETRY;
- if (handle_abnormal_pfn(vcpu, fault->is_tdp ? 0 : gpa, gfn, pfn, ACC_ALL, &r))
+ if (handle_abnormal_pfn(vcpu, fault->is_tdp ? 0 : gpa,
+ fault->gfn, pfn, ACC_ALL, &r))
return r;
r = RET_PF_RETRY;
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 5352323646b0..2ef219bf1745 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -858,7 +858,8 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
return RET_PF_RETRY;
}
- if (page_fault_handle_page_track(vcpu, error_code, walker.gfn)) {
+ fault->gfn = walker.gfn;
+ if (page_fault_handle_page_track(vcpu, fault)) {
shadow_page_table_clear_flood(vcpu, addr);
return RET_PF_EMULATE;
}
@@ -880,11 +881,11 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
mmu_seq = vcpu->kvm->mmu_notifier_seq;
smp_rmb();
- if (try_async_pf(vcpu, fault->prefault, walker.gfn, addr, &pfn, &hva,
+ if (try_async_pf(vcpu, fault->prefault, fault->gfn, addr, &pfn, &hva,
fault->write, &map_writable))
return RET_PF_RETRY;
- if (handle_abnormal_pfn(vcpu, addr, walker.gfn, pfn, walker.pte_access, &r))
+ if (handle_abnormal_pfn(vcpu, addr, fault->gfn, pfn, walker.pte_access, &r))
return r;
/*
--
2.27.0
next prev parent reply other threads:[~2021-08-07 13:50 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-07 13:49 [PATCH 00/16] KVM: x86: pass arguments on the page fault path via struct kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 01/16] KVM: MMU: pass unadulterated gpa to direct_page_fault Paolo Bonzini
2021-09-01 22:54 ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 02/16] KVM: x86: clamp host mapping level to max_level in kvm_mmu_max_mapping_level Paolo Bonzini
2021-08-13 16:28 ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 03/16] KVM: MMU: Introduce struct kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 04/16] KVM: MMU: change mmu->page_fault() arguments to kvm_page_fault Paolo Bonzini
2021-08-07 13:49 ` [PATCH 05/16] KVM: MMU: change direct_page_fault() " Paolo Bonzini
2021-08-07 13:49 ` Paolo Bonzini [this message]
2021-09-01 23:04 ` [PATCH 06/16] KVM: MMU: change page_fault_handle_page_track() " Sean Christopherson
2021-08-07 13:49 ` [PATCH 07/16] KVM: MMU: change try_async_pf() " Paolo Bonzini
2021-09-01 23:05 ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 08/16] KVM: MMU: change handle_abnormal_pfn() " Paolo Bonzini
2021-09-01 23:15 ` Sean Christopherson
2021-08-07 13:49 ` [PATCH 09/16] KVM: MMU: change __direct_map() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 10/16] KVM: MMU: change FNAME(fetch)() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 11/16] KVM: MMU: change kvm_tdp_mmu_map() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 12/16] KVM: MMU: change tdp_mmu_map_handle_target_level() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 13/16] KVM: MMU: change fast_page_fault() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 14/16] KVM: MMU: change kvm_mmu_hugepage_adjust() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 15/16] KVM: MMU: change disallowed_hugepage_adjust() " Paolo Bonzini
2021-08-07 13:49 ` [PATCH 16/16] KVM: MMU: change tracepoints " Paolo Bonzini
2021-09-01 23:28 ` Sean Christopherson
2021-08-12 17:44 ` [PATCH 00/16] KVM: x86: pass arguments on the page fault path via struct kvm_page_fault David Matlack
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