From: Zachary Amsden <zamsden@redhat.com>
To: kvm@vger.kernel.org
Cc: Zachary Amsden <zamsden@redhat.com>, Avi Kivity <avi@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Joerg Roedel <joerg.roedel@amd.com>,
linux-kernel@vger.kernel.org, Dor Laor <dlaor@redhat.com>
Subject: [PATCH RFC: kvm tsc virtualization 20/20] Get passthrough TSC working in SVM again
Date: Mon, 14 Dec 2009 18:08:47 -1000 [thread overview]
Message-ID: <1260850127-9766-21-git-send-email-zamsden@redhat.com> (raw)
In-Reply-To: <1260850127-9766-20-git-send-email-zamsden@redhat.com>
Quick and dirty hack to get passthrough TSC back in SVM.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
---
arch/x86/kvm/svm.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 91eb263..91107a4 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -571,7 +571,6 @@ static void init_vmcb(struct vcpu_svm *svm)
control->intercept = (1ULL << INTERCEPT_INTR) |
(1ULL << INTERCEPT_NMI) |
(1ULL << INTERCEPT_SMI) |
- (1ULL << INTERCEPT_RDTSC) |
(1ULL << INTERCEPT_CPUID) |
(1ULL << INTERCEPT_INVD) |
(1ULL << INTERCEPT_HLT) |
@@ -592,6 +591,9 @@ static void init_vmcb(struct vcpu_svm *svm)
(1ULL << INTERCEPT_MONITOR) |
(1ULL << INTERCEPT_MWAIT);
+ if (svm->vcpu.kvm->arch.tsc_mode != KVM_TSC_MODE_PASSTHROUGH)
+ control->intercept |= (1ULL << INTERCEPT_RDTSC);
+
control->iopm_base_pa = iopm_base;
control->msrpm_base_pa = __pa(svm->msrpm);
control->tsc_offset = 0;
--
1.6.5.2
next prev parent reply other threads:[~2009-12-15 4:07 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1260850127-9766-1-git-send-email-zamsden@redhat.com>
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 01/20] Move TSC read to vmx_vcpu_put Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 02/20] Add a hotplug notifier to KVM x86 backend Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 03/20] TSC offset framework Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 04/20] Synchronize TSC when a new CPU comes up Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 05/20] Fix AMD C1 TSC desynchronization Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 06/20] Make TSC reference stable across frequency changes Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 07/20] Basic SVM implementation of RDTSC trapping Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 08/20] Export the reference TSC from KVM module Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 09/20] Use TSC reference for SVM Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 10/20] Add a stat counter for RDTSC exits Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 11/20] Use highest TSC frequency as reference clock Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 12/20] Higher accuracy TSC offset computation Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 13/20] Combine observed TSC deviation into moving average Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 14/20] Move TSC cpu vars to a struct Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 15/20] Fix longstanding races Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 16/20] Fix 32-bit mult_precise Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 17/20] Periodically measure TSC skew Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 18/20] Implement variable speed TSC Zachary Amsden
2009-12-15 4:08 ` [PATCH RFC: kvm tsc virtualization 19/20] IOCTL for different TSC modes Zachary Amsden
2009-12-15 4:08 ` Zachary Amsden [this message]
2009-12-15 13:58 ` [PATCH RFC: kvm tsc virtualization 15/20] Fix longstanding races Andi Kleen
2009-12-15 18:21 ` Marcelo Tosatti
2009-12-15 21:26 ` Zachary Amsden
2009-12-16 14:41 ` Marcelo Tosatti
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