motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

i386/cpu/hyperv: support over 64 vcpus for windows guests

Browse source 
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>
This commit is contained in:
Gonglei 2017-09-11 23:20:27 +08:00 • committed by Paolo Bonzini
parent 05cb8ed546
commit 6c69dfb67e
4 changed files with 23 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/hw/i386/pc.h
View file

@ -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 \