From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH 05/45] KVM: loongarch: do full validity check on the gfn-to-hva cache
Date: Mon, 2 Nov 2026 12:40:49 -0500 [thread overview]
Message-ID: <20261102174130.8779-6-pbonzini@redhat.com> (raw)
In-Reply-To: <20261102174130.8779-1-pbonzini@redhat.com>
If the HVA or the memslots are invalid, reinitialize the cache.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://patch.msgid.link/20260918135030.171564-20-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/loongarch/kvm/vcpu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 4026b9bf9f2d..059a6d605de7 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -165,7 +165,8 @@ static void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
gpa &= KVM_STEAL_PHYS_MASK;
slots = kvm_memslots(vcpu->kvm);
- if (slots->generation != ghc->generation || gpa != ghc->gpa) {
+ if (unlikely(slots->generation != ghc->generation || gpa != ghc->gpa ||
+ kvm_is_error_hva(ghc->hva) || !ghc->memslot)) {
if (kvm_gfn_to_hva_cache_init(vcpu->kvm, ghc, gpa, sizeof(*st))) {
ghc->gpa = INVALID_GPA;
return;
@@ -1820,7 +1821,8 @@ static void kvm_vcpu_set_pv_preempted(struct kvm_vcpu *vcpu)
gpa &= KVM_STEAL_PHYS_MASK;
ghc = &vcpu->arch.st.cache;
slots = kvm_memslots(vcpu->kvm);
- if (slots->generation != ghc->generation || gpa != ghc->gpa) {
+ if (unlikely(slots->generation != ghc->generation || gpa != ghc->gpa ||
+ kvm_is_error_hva(ghc->hva) || !ghc->memslot)) {
if (kvm_gfn_to_hva_cache_init(vcpu->kvm, ghc, gpa, sizeof(*st))) {
ghc->gpa = INVALID_GPA;
return;
--
2.52.0
next prev parent reply other threads:[~2026-11-02 17:41 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 17:40 [PATCH v4 00/45] KVM: x86: Introduce memory protection attributes Paolo Bonzini
2026-11-02 17:40 ` [PATCH 01/45] KVM: nVMX/nSVM: check unconditionally whether CR3 is valid Paolo Bonzini
2026-11-02 17:40 ` [PATCH 02/45] KVM: x86/hyperv: do not overwrite hc->ingpa for SIGNAL_EVENT hypercall Paolo Bonzini
2026-11-02 17:40 ` [PATCH 03/45] KVM: x86: apply nGPA->GPA translation to KVM_HC_CLOCK_PAIRING Paolo Bonzini
2026-11-02 17:40 ` [PATCH 04/45] KVM: x86/emulate: Check TSS busy-bit writes during task switches Paolo Bonzini
2026-11-02 17:40 ` Paolo Bonzini [this message]
2026-11-02 17:40 ` [PATCH 06/45] KVM: selftests: Test address translation for Hyper-V direct L2 hypercalls Paolo Bonzini
2026-11-02 17:40 ` [PATCH 07/45] KVM: selftests: Take into account mixed memory fault flags Paolo Bonzini
2026-11-02 17:40 ` [PATCH 08/45] selftests: kvm: drop TEST_ASSERT_SUPPORTED_ATTRIBUTES Paolo Bonzini
2026-11-02 17:40 ` [PATCH 09/45] KVM: Define and communicate KVM_EXIT_MEMORY_FAULT RWX flags to userspace Paolo Bonzini
2026-11-02 17:40 ` [PATCH 10/45] KVM: x86: Introduce memory fault on invalid hypercalls reads/writes Paolo Bonzini
2026-11-02 17:40 ` [PATCH 11/45] KVM: selftests: test hypercall memory fault exits Paolo Bonzini
2026-11-02 17:40 ` [PATCH 12/45] KVM: x86/mmu: intersect writability from __kvm_faultin_pfn with fault->map_writable Paolo Bonzini
2026-11-02 17:40 ` [PATCH 13/45] KVM: x86/mmu: Extend map_writable to a full ACC_* mask Paolo Bonzini
2026-11-02 17:40 ` [PATCH 14/45] KVM: x86/mmu: Init memslot hugepage information for non-private_mem VMs too Paolo Bonzini
2026-11-02 17:40 ` [PATCH 15/45] KVM: VMX: return error from kvm_set_cr* Paolo Bonzini
2026-11-02 17:41 ` [PATCH 16/45] KVM: adjust for presence of more than one attribute Paolo Bonzini
2026-11-02 17:44 ` [PATCH 17/45] KVM: Introduce NR/NW/NX memory attributes Paolo Bonzini
2026-11-03 9:25 ` kernel test robot
2026-11-02 17:44 ` [PATCH 18/45] KVM: Include memory protections in result of gfn->hva conversion Paolo Bonzini
2026-11-02 17:44 ` [PATCH 19/45] KVM: Introduce kvm_fetch_guest_page() and use it for x86 Paolo Bonzini
2026-11-02 17:44 ` [PATCH 20/45] KVM: Take memory protections into account for memory read/write/fetch Paolo Bonzini
2026-11-02 17:44 ` [PATCH 21/45] KVM: Take memory protections into account for __kvm_vcpu_map Paolo Bonzini
2026-11-02 17:44 ` [PATCH 22/45] KVM: Encapsulate memattrs array into anonymous struct Paolo Bonzini
2026-11-02 17:44 ` [PATCH 23/45] KVM: Introduce kvm_check_gen()/kvm_memslots_check_gen() Paolo Bonzini
2026-11-02 17:44 ` [PATCH 24/45] KVM: Introduce a generation number for memory attributes Paolo Bonzini
2026-11-02 17:44 ` [PATCH 25/45] KVM: Take memory protections into account for accesses with cached gfn->hva Paolo Bonzini
2026-11-02 17:44 ` [PATCH 26/45] KVM: pfncache: Fail to refresh if it contains memory protections Paolo Bonzini
2026-11-02 17:44 ` [PATCH 27/45] KVM: x86/mmu: Do not prefetch sptes on gfns backed by memory attributes Paolo Bonzini
2026-11-02 17:44 ` [PATCH 28/45] KVM: x86/mmu: Take memory protection attributes into account during faults Paolo Bonzini
2026-11-02 17:44 ` [PATCH 29/45] KVM: x86/emulate: change return value of emulator_io_permitted to int Paolo Bonzini
2026-11-02 17:44 ` [PATCH 30/45] KVM: x86/emulate: Propagate memory faults to userspace Paolo Bonzini
2026-11-02 17:44 ` [PATCH 31/45] KVM: x86: "Handle" failed decode when skipping instructions Paolo Bonzini
2026-11-02 17:44 ` [PATCH 32/45] KVM: vmx/sgx: make return value of sgx_gva_to_gpa consistent with its callers Paolo Bonzini
2026-11-02 17:45 ` [PATCH 33/45] KVM: x86: Allow page fault fixup to return errors Paolo Bonzini
2026-11-02 17:45 ` [PATCH 34/45] KVM: x86/mmu: Adjust gva_to_gpa to allow returning an error Paolo Bonzini
2026-11-02 17:45 ` [PATCH 35/45] KVM: x86/mmu: Propagate errors from nested GPA translation Paolo Bonzini
2026-11-02 17:45 ` [PATCH 36/45] KVM: x86: Propagate memory faults through load_pdptrs() Paolo Bonzini
2026-11-02 17:45 ` [PATCH 37/45] KVM: x86/mmu: Issue memory fault exit if walk failed due to memory attribute Paolo Bonzini
2026-11-02 17:45 ` [PATCH 38/45] KVM: x86: mark VM as dead after KVM_SET_SREGS fails to load PDPTRs Paolo Bonzini
2026-11-02 17:45 ` [PATCH 39/45] KVM: VMX: mark VM dead on shadow VMCS or eVMCS access failures Paolo Bonzini
2026-11-02 17:45 ` [PATCH 40/45] KVM: let kvm_arch_post_set_memory_attributes drop mmu_lock Paolo Bonzini
2026-11-02 17:45 ` [PATCH 41/45] KVM: x86/mmu: Obsolete all roots if memattr contains gPTEs Paolo Bonzini
2026-11-02 17:45 ` [PATCH 42/45] KVM: x86: selftests: Introduce memory protection attributes test Paolo Bonzini
2026-11-02 17:45 ` [PATCH 43/45] KVM: x86: selftests: Introduce memory attributes PTE test Paolo Bonzini
2026-11-02 17:45 ` [PATCH 44/45] KVM: x86: selftests: Introduce memory attributes side-channel tests Paolo Bonzini
2026-11-02 17:45 ` [PATCH 45/45] KVM: x86: split out parts of load_pdptrs Paolo Bonzini
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