| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 6 Jan 2008 16:39:07 +0200 From: Avi Kivity <avi@...ranet.com> To: linux-kernel@...r.kernel.org, kvm-devel@...ts.sourceforge.net Cc: Joerg Roedel <joerg.roedel@....com> Subject: [PATCH 01/33] KVM: SVM: support writing 0 to K8 performance counter control registers From: Joerg Roedel <joerg.roedel@....com> This lets SVM ignore writes of the value 0 to the performance counter control registers. Thus enabling them will still fail in the guest, but a write of 0 which keeps them disabled is accepted. This is required to boot Windows Vista 64bit. [avi: avoid fall-thru in switch statement] Signed-off-by: Joerg Roedel <joerg.roedel@....com> Signed-off-by: Markus Rechberger <markus.rechberger@....com> Signed-off-by: Avi Kivity <avi@...ranet.com> --- drivers/kvm/svm.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 9f8564a..839a75f 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1155,7 +1155,20 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) case MSR_IA32_SYSENTER_ESP: svm->vmcb->save.sysenter_esp = data; break; + case MSR_K7_EVNTSEL0: + case MSR_K7_EVNTSEL1: + case MSR_K7_EVNTSEL2: + case MSR_K7_EVNTSEL3: + /* + * only support writing 0 to the performance counters for now + * to make Windows happy. Should be replaced by a real + * performance counter emulation later. + */ + if (data != 0) + goto unhandled; + break; default: + unhandled: return kvm_set_msr_common(vcpu, ecx, data); } return 0; -- 1.5.3.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists