From: Jidong Xiao <jidong.xiao@gmail.com>
To: qemu-devel@nongnu.org, KVM <kvm@vger.kernel.org>
Subject: [Qemu-devel] [PATCH] Qemu: Fix eax for cpuid leaf 0x40000000
Date: Tue, 3 Jun 2014 21:10:06 -0400 [thread overview]
Message-ID: <CAG4AFWajxKx_VWMLGMzto19Tfk6XwtGpLa9H=bRGbug+3O6mBA@mail.gmail.com> (raw)
Hi,
Since Linux kernel 3.5, KVM has set eax to KVM_CPUID_FEATURES, for
leaf 0x40000000, see this:
https://github.com/torvalds/linux/commit/57c22e5f35aa4b9b2fe11f73f3e62bbf9ef36190
But qemu still tries to set it to 0. It would be better to make qemu
and kvm consistent. This patch just fixes this issue.
Signed-off-by: Jidong Xiao <jidong.xiao@gmail.com>
---
diff --git a/qemu-2.0.0/target-i386/kvm.c.orig b/qemu-2.0.0/target-i386/kvm.c
index 4389959..b8b282d 100644
--- a/qemu-2.0.0/target-i386/kvm.c.orig
+++ b/qemu-2.0.0/target-i386/kvm.c
@@ -530,7 +530,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
memcpy(signature, "KVMKVMKVM\0\0\0", 12);
c = &cpuid_data.entries[cpuid_i++];
c->function = KVM_CPUID_SIGNATURE | kvm_base;
- c->eax = 0;
+ c->eax = KVM_CPUID_FEATURES;
c->ebx = signature[0];
c->ecx = signature[1];
c->edx = signature[2];
next reply other threads:[~2014-06-04 1:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-04 1:10 Jidong Xiao [this message]
2014-06-04 7:09 ` [Qemu-devel] [PATCH] Qemu: Fix eax for cpuid leaf 0x40000000 Paolo Bonzini
2014-06-04 7:17 ` Jidong Xiao
2014-06-04 19:08 ` Bandan Das
2014-06-04 19:47 ` Jidong Xiao
2014-06-04 21:26 ` Bandan Das
2014-08-12 18:55 ` Eduardo Habkost
2014-08-12 19:12 ` Paolo Bonzini
2014-08-12 19:29 ` Eduardo Habkost
2014-08-13 12:18 ` Paolo Bonzini
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