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[Qemu-devel] [PATCH v3 07/17] target-i386: Use Hypervisor level in -mach
From: |
Don Slutz |
Subject: |
[Qemu-devel] [PATCH v3 07/17] target-i386: Use Hypervisor level in -machine pc, accel=tcg. |
Date: |
Mon, 17 Sep 2012 09:39:35 -0400 |
Also known as Paravirtualization level.
This change is based on:
Microsoft Hypervisor CPUID Leaves:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff542428%28v=vs.85%29.aspx
Linux kernel change starts with:
http://fixunix.com/kernel/538707-use-cpuid-communicate-hypervisor.html
Also:
http://lkml.indiana.edu/hypermail/linux/kernel/1205.0/00100.html
VMware documention on CPUIDs (Mechanisms to determine if software is
running in a VMware virtual machine):
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458
QEMU knows this is KVM_CPUID_SIGNATURE (0x40000000).
This does not provide vendor support in tcg yet.
Signed-off-by: Don Slutz <address@hidden>
---
target-i386/cpu.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 4120393..d3b9bd8 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1651,6 +1651,16 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
index = env->cpuid_xlevel;
}
}
+ } else if (index & 0x40000000) {
+ if (env->cpuid_hv_level > 0) {
+ /* Handle Hypervisor CPUIDs */
+ if (index > env->cpuid_hv_level) {
+ index = env->cpuid_hv_level;
+ }
+ } else {
+ if (index > env->cpuid_level)
+ index = env->cpuid_level;
+ }
} else {
if (index > env->cpuid_level)
index = env->cpuid_level;
@@ -1789,6 +1799,18 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
*edx = 0;
}
break;
+ case 0x40000000:
+ *eax = env->cpuid_hv_level;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ case 0x40000001:
+ *eax = env->cpuid_kvm_features;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
case 0x80000000:
*eax = env->cpuid_xlevel;
*ebx = env->cpuid_vendor1;
--
1.7.1