Re: [Qemu-devel] [PATCH v7 00/17] target-i386: Add way to expose VMWare CPUID

[Marcelo Tosatti <mtosatti@redhat.com>]

On Fri, Oct 12, 2012 at 03:56:05PM -0400, Don Slutz wrote:
> Also known as Paravirtualization CPUIDs.
> 
> This is primarily done so that the guest will think it is running
> under vmware when hypervisor-vendor=vmware is specified as a
> property of a cpu.
> 
> Patches 1 to 3 define new cpu properties.
> Patches 4 to 6 Add QOM access to the new properties.
> Patches 7 to 9 Add setting of these when cpu features hv_spinlocks,
>   hv_relaxed, or hv_vapic are specified.
> Patches 10 to 12 Change kvm to use these.
> Patch 13 Add VMware timing info to kvm.
> Patch 14 Makes it easier to use hypervisor-vendor=vmware.
> Patches 15 to 17 Change tcg to use the new properties.
> 
> This depends on:
> 
> http://lists.gnu.org/archive/html/qemu-devel/2012-09/msg01400.html
> 
> As far as I know it is #4. It depends on (1) and (2) and (3).
> 
> 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
> 
> Changes from v6 to v7:
>   Subject changed from "Allow changing of Hypervisor CPUIDs." to "target-i386: Add way to expose VMWare CPUID"
>   Split out 01/16 target-i386: Add missing kvm bits.
>     It is no longer related to this patch set.  Will be top posted as a seperate patch.
> Marcelo Tosatti:
>   Better commit messages.
>   Reorder patches.
> 
> 
> Changes from v5 to v6:
>   Split out 01/17: target-i386: Allow tsc-frequency to be larger then 2.147G
>     It has been accepted as a trivial patch:
>     http://lists.gnu.org/archive/html/qemu-devel/2012-09/msg03959.html
> Blue Swirl:
>   Fix 2 checkpatch.pl "WARNING: line over 80 characters".
> 
> Changes from v4 to v5:
>   Undo kvm_clock2 change.
>   Add cpuid_hv_level_set; cpuid_hv_level == 0 is now valid.
>   Add cpuid_hv_vendor_set; the null string is now valid.
>   Handle kvm and cpuid_hv_level == 0.
>   hypervisor-vendor=kvm,hypervisor-level=0 and hypervisor-level=0,hypervisor-vendor=kvm
>     now do the same thing.
> 
> Changes from v3 to v4:
>   Added CPUID_HV_LEVEL_HYPERV, CPUID_HV_LEVEL_KVM.
>   Added CPUID_HV_VENDOR_HYPERV.
>   Added hyperv as known hypservisor-vendor.
>   Allow hypervisor-level to be 0.
> 
> Changes from v2 to v3:
>   Clean post to qemu-devel.
> 
> Changes from v1 to v2:
> 
> 1) Added 1/4 from http://lists.gnu.org/archive/html/qemu-devel/2012-08/msg05153.html
> 
>    Because Fred is changing jobs and so will not be pushing to get
>    this in. It needed to be rebased, And I needed it to complete the
>    testing of this change.
> 
> 2) Added 2/4 because of the re-work I needed a way to clear all KVM bits,
> 
> 3) The rework of v1.  Make it fit into the object model re-work of cpu.c for x86.
> 
> 4) Added 3/4 -- The split out of the code that is not needed for accel=kvm.
> 
> Changes from v2 to v3:
> 
> Marcelo Tosatti:
>   Its one big patch, better split in logically correlated patches
>   (with better changelog). This would help reviewers.
> 
> So split 3 and 4 into 3 to 17.  More info in change log.
> No code change.
> 
> Don Slutz (17):
>   target-i386: Add Hypervisor level.
>   target-i386: Add Hypervisor vendor.
>   target-i386: Add Hypervisor features.
>   target-i386: Add cpu object access routines for Hypervisor level.
>   target-i386: Add cpu object access routines for Hypervisor vendor.
>   target-i386: Add cpu object access routines for Hypervisor features.
>   target-i386: Add x86_set_hyperv.
>   target-i386: Use x86_set_hyperv to set hypervisor vendor.
>   target-i386: Use x86_set_hyperv to set hypervisor features.
>   target-i386: Use Hypervisor level in -machine pc,accel=kvm.
>   target-i386: Use Hypervisor vendor in -machine pc,accel=kvm.
>   target-i386: Use Hypervisor features in -machine pc,accel=kvm.
>   target-i386: Add VMWare CPUID Timing information in -machine
>     pc,accel=kvm.
>   target-i386: Add vmare as a known name to Hypervisor vendor.
>   target-i386: Use Hypervisor level in -machine pc,accel=tcg.
>   target-i386: Use Hypervisor vendor in -machine pc,accel=tcg.
>   target-i386: target-i386: Add VMWare CPUID Timing information in
>     -machine pc,accel=tcg
> 
>  target-i386/cpu.c |  205 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  target-i386/cpu.h |   29 ++++++++
>  target-i386/kvm.c |   69 +++++++++++++++----
>  3 files changed, 290 insertions(+), 13 deletions(-)
> 

Looks good overall.