openstlinux/linux-st
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: x86: hyper-v: Honor HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED bit

Browse Source 
Hyper-V partition must possess 'HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED'
privilege ('recommended' is rather a misnomer) to issue
HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST/SPACE hypercalls.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-26-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov
2021-05-21 11:51:59 +02:00
committed by Paolo Bonzini
parent a921cf83cc
commit bb53ecb4d6
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/kvm/hyperv.c
View File

@ -2112,6 +2112,12 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code)
*/ */
return !kvm_hv_is_syndbg_enabled(hv_vcpu->vcpu) || return !kvm_hv_is_syndbg_enabled(hv_vcpu->vcpu) ||
hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING; hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING;
case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
return hv_vcpu->cpuid_cache.enlightenments_eax &
HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
default: default:
break; break;
} }