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| author | Gonglei <arei.gonglei@huawei.com> | 2017-09-11 23:20:27 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-09-19 16:20:49 +0200 |
| commit | 6c69dfb67e84747cf071958594d939e845dfcc0c (patch) | |
| tree | 97b7f03024f43bce6ac98056a344d1446e70da2f /include | |
| parent | 05cb8ed5467ff0f154f9356fa0cdcf7fca4b17f6 (diff) | |
| download | qemu-6c69dfb67e84747cf071958594d939e845dfcc0c.tar.gz | |
i386/cpu/hyperv: support over 64 vcpus for windows guests
Starting with Windows Server 2012 and Windows 8, if
CPUID.40000005.EAX contains a value of -1, Windows assumes specific
limit to the number of VPs. In this case, Windows Server 2012
guest VMs may use more than 64 VPs, up to the maximum supported
number of processors applicable to the specific Windows
version being used.
https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
For compatibility, Let's introduce a new property for X86CPU,
named "x-hv-max-vps" as Eduardo's suggestion, and set it
to 0x40 before machine 2.10.
(The "x-" prefix indicates that the property is not supposed to
be a stable user interface.)
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Message-Id: <1505143227-14324-1-git-send-email-arei.gonglei@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/i386/pc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 8226904524..087d184ef5 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -371,6 +371,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); #define PC_COMPAT_2_10 \ HW_COMPAT_2_10 \ + {\ + .driver = TYPE_X86_CPU,\ + .property = "x-hv-max-vps",\ + .value = "0x40",\ + }, #define PC_COMPAT_2_9 \ HW_COMPAT_2_9 \ |