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| author | Ladi Prosek <lprosek@redhat.com> | 2016-11-30 16:03:10 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-12-08 15:31:10 +0100 |
| commit | 9ed38ffad47316dbdc16de0de275868c7771754d (patch) | |
| tree | b850a0a07f6fa96a8f60cca1bcc6a628feaddc69 /arch/x86/kvm/x86.c | |
| parent | ee146c1c100dbe9ca92252be2e901b957476b253 (diff) | |
| download | lwn-9ed38ffad47316dbdc16de0de275868c7771754d.tar.gz lwn-9ed38ffad47316dbdc16de0de275868c7771754d.zip | |
KVM: nVMX: introduce nested_vmx_load_cr3 and call it on vmentry
Loading CR3 as part of emulating vmentry is different from regular CR3 loads,
as implemented in kvm_set_cr3, in several ways.
* different rules are followed to check CR3 and it is desirable for the caller
to distinguish between the possible failures
* PDPTRs are not loaded if PAE paging and nested EPT are both enabled
* many MMU operations are not necessary
This patch introduces nested_vmx_load_cr3 suitable for CR3 loads as part of
nested vmentry and vmexit, and makes use of it on the nested vmentry path.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index dd6b41ea61b6..f0aee98e7492 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -566,7 +566,7 @@ out: } EXPORT_SYMBOL_GPL(load_pdptrs); -static bool pdptrs_changed(struct kvm_vcpu *vcpu) +bool pdptrs_changed(struct kvm_vcpu *vcpu) { u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; bool changed = true; @@ -592,6 +592,7 @@ out: return changed; } +EXPORT_SYMBOL_GPL(pdptrs_changed); int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) { |