From: Sasha Levin <levinsasha928@gmail.com>
To: penberg@kernel.org, mingo@elte.hu, gorcunov@gmail.com,
asias.hejun@gmail.com
Cc: kvm@vger.kernel.org, Sasha Levin <levinsasha928@gmail.com>
Subject: [PATCH 1/2] kvm tools: set the HYPERVISOR flag in cpuid
Date: Fri, 15 Jun 2012 13:34:16 +0200 [thread overview]
Message-ID: <1339760057-17969-1-git-send-email-levinsasha928@gmail.com> (raw)
We need to set the HYPERVISOR flag to let the kernel know we're running
under a hypervisor.
This makes the kernel enable all sorts of para-virtualization options
such as kvm-clock.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
---
tools/kvm/x86/cpuid.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/x86/cpuid.c b/tools/kvm/x86/cpuid.c
index 75f3b4d..6a20dd0 100644
--- a/tools/kvm/x86/cpuid.c
+++ b/tools/kvm/x86/cpuid.c
@@ -21,6 +21,10 @@ static void filter_cpuid(struct kvm_cpuid2 *kvm_cpuid)
struct kvm_cpuid_entry2 *entry = &kvm_cpuid->entries[i];
switch (entry->function) {
+ case 1:
+ if (entry->index == 0)
+ entry->ecx |= (1<<31);
+ break;
case 6:
/* Clear presence of IA32_ENERGY_PERF_BIAS */
entry->ecx = entry->ecx & ~(1 << 3);
--
1.7.8.6
next reply other threads:[~2012-06-15 11:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-15 11:34 Sasha Levin [this message]
2012-06-15 11:34 ` [PATCH 2/2] kvm tools: support 9p flush command Sasha Levin
2012-06-20 7:23 ` Pekka Enberg
2012-06-15 11:38 ` [PATCH 1/2] kvm tools: set the HYPERVISOR flag in cpuid Cyrill Gorcunov
2012-06-20 7:23 ` Pekka Enberg
2012-06-20 7:37 ` Cyrill Gorcunov
2012-06-20 7:59 ` Pekka Enberg
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