GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-26 08:31:13 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

KVM: nVMX: Drop redundant checks on vmcs12 in EPTP switching emulation

Browse source 
Drop the explicit check on EPTP switching being enabled.  The EPTP
switching check is handled in the generic VMFUNC function check, while
the underlying VMFUNC enablement check is done by hardware and redone
by generic VMFUNC emulation.

The vmcs12 EPT check is handled by KVM at VM-Enter in the form of a
consistency check, keep it but add a WARN.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210609234235.1244004-16-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-06-09 16:42:35 -07:00 • committed by Paolo Bonzini
parent 546e8398bc
commit c5ffd408cd
1 changed files with 1 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

4
arch/x86/kvm/vmx/nested.c
View file

@ -5506,10 +5506,8 @@ static int nested_vmx_eptp_switching(struct kvm_vcpu *vcpu,
u32 index = kvm_rcx_read(vcpu);
u64 new_eptp;
if (!nested_cpu_has_eptp_switching(vmcs12) ||
!nested_cpu_has_ept(vmcs12))
if (WARN_ON_ONCE(!nested_cpu_has_ept(vmcs12)))
return 1;
if (index >= VMFUNC_EPTP_ENTRIES)
return 1;