[PATCH v6 09/16] target-i386: Use Hypervisor vendor in -machine pc,accel=kvm.

Don Slutz
2012-09-24T14:32:57Z

Also known as Paravirtualization vendor.

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

Signed-off-by: Don Slutz <Don@CloudSwitch.com>
---
target-i386/kvm.c | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8462c75..f8a5177 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -389,16 +389,18 @@ int kvm_arch_init_vcpu(CPUX86State *env)
c = &cpuid_data.entries[cpuid_i++];
memset(c, 0, sizeof(*c));
c->function = KVM_CPUID_SIGNATURE;
- if (!env->cpuid_hv_level_set) {
+ if (!env->cpuid_hv_level_set && !env->cpuid_hv_vendor_set) {
memcpy(signature, "KVMKVMKVM\0\0\0", 12);
c->eax = 0;
+ c->ebx = signature[0];
+ c->ecx = signature[1];
+ c->edx = signature[2];
} else {
- memcpy(signature, "Microsoft Hv", 12);
c->eax = env->cpuid_hv_level;
+ c->ebx = env->cpuid_hv_vendor1;
+ c->ecx = env->cpuid_hv_vendor2;
+ c->edx = env->cpuid_hv_vendor3;
}
- c->ebx = signature[0];
- c->ecx = signature[1];
- c->edx = signature[2];

c = &cpuid_data.entries[cpuid_i++];
memset(c, 0, sizeof(*c));
--
1.7.1