Patchwork [v7,03/17] target-i386: Add Hypervisor features.

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Submitter Don Slutz
Date Oct. 12, 2012, 7:56 p.m.
Message ID <1350071782-23078-4-git-send-email-Don@CloudSwitch.com>
Download mbox | patch
Permalink /patch/191210/
State New
Headers show

Comments

Don Slutz - Oct. 12, 2012, 7:56 p.m.
Part of "target-i386: Add way to expose VMWare CPUID"

Also known as kvm festures or Hypervisor vendor-neutral interface identification.
This is the EAX value for 0x40000001.

QEMU knows this is KVM_CPUID_FEATURES (0x40000001) in some builds.

This 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/cpu.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Patch

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index e76ddc0..fbc8f66 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -779,6 +779,7 @@  typedef struct CPUX86State {
     bool cpuid_vendor_override;
     bool cpuid_hv_level_set;
     bool cpuid_hv_vendor_set;
+    bool cpuid_hv_features_set;
     /* Store the results of Centaur's CPUID instructions */
     uint32_t cpuid_xlevel2;
     uint32_t cpuid_ext4_features;
@@ -789,6 +790,8 @@  typedef struct CPUX86State {
     uint32_t cpuid_hv_vendor1;
     uint32_t cpuid_hv_vendor2;
     uint32_t cpuid_hv_vendor3;
+    /* Hypervisor features */
+    uint32_t cpuid_hv_features;
 
     /* MTRRs */
     uint64_t mtrr_fixed[11];