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| author |   Yu Zhang <yu.c.zhang@linux.intel.com> | 2019-02-01 00:09:23 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2019-02-22 19:25:10 +0100 |
| commit | de3ccd26fafc707b09792d9b633c8b5b48865315 (patch) | |
| tree | 0a8d3d19ab24b7accfe02d160445688224fa238d /arch/x86/include | |
| parent | kvm: x86: Return LA57 feature based on hardware capability (diff) | |
| download | linux-dev-de3ccd26fafc707b09792d9b633c8b5b48865315.tar.xz linux-dev-de3ccd26fafc707b09792d9b633c8b5b48865315.zip | |
KVM: MMU: record maximum physical address width in kvm_mmu_extended_role
Previously, commit 7dcd57552008 ("x86/kvm/mmu: check if tdp/shadow
MMU reconfiguration is needed") offered some optimization to avoid
the unnecessary reconfiguration. Yet one scenario is broken - when
cpuid changes VM's maximum physical address width, reconfiguration
is needed to reset the reserved bits. Also, the TDP may need to
reset its shadow_root_level when this value is changed.
To fix this, a new field, maxphyaddr, is introduced in the extended
role structure to keep track of the configured guest physical address
width.
Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 593e17b7797e..180373360e34 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -299,6 +299,7 @@ union kvm_mmu_extended_role { unsigned int cr4_smap:1; unsigned int cr4_smep:1; unsigned int cr4_la57:1; + unsigned int maxphyaddr:6; }; }; |