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| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-11-08 20:43:53 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:24:58 -0500 |
| commit | 2c5653caecc4807b8abfe9c41880ac38417be7bf (patch) | |
| tree | 1bb5577e0dbea3f99c0ecf5ff63933b562d24207 /tools/perf/scripts/python/libxed.py | |
| parent | KVM: x86/svm: Add module param to control PMU virtualization (diff) | |
| download | linux-2c5653caecc4807b8abfe9c41880ac38417be7bf.tar.gz linux-2c5653caecc4807b8abfe9c41880ac38417be7bf.zip | |
KVM: X86: Ensure that dirty PDPTRs are loaded
For VMX with EPT, dirty PDPTRs need to be loaded before the next vmentry
via vmx_load_mmu_pgd()
But not all paths that call load_pdptrs() will cause vmx_load_mmu_pgd()
to be invoked. Normally, kvm_mmu_reset_context() is used to cause
KVM_REQ_LOAD_MMU_PGD, but sometimes it is skipped:
* commit d81135a57aa6("KVM: x86: do not reset mmu if CR0.CD and
CR0.NW are changed") skips kvm_mmu_reset_context() after load_pdptrs()
when changing CR0.CD and CR0.NW.
* commit 21823fbda552("KVM: x86: Invalidate all PGDs for the current
PCID on MOV CR3 w/ flush") skips KVM_REQ_LOAD_MMU_PGD after
load_pdptrs() when rewriting the CR3 with the same value.
* commit a91a7c709600("KVM: X86: Don't reset mmu context when
toggling X86_CR4_PGE") skips kvm_mmu_reset_context() after
load_pdptrs() when changing CR4.PGE.
Fixes: d81135a57aa6 ("KVM: x86: do not reset mmu if CR0.CD and CR0.NW are changed")
Fixes: 21823fbda552 ("KVM: x86: Invalidate all PGDs for the current PCID on MOV CR3 w/ flush")
Fixes: a91a7c709600 ("KVM: X86: Don't reset mmu context when toggling X86_CR4_PGE")
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211108124407.12187-2-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions