Comment 0 for bug 1828495
Revision history for this message
| quanxian (quanxian-wang) wrote 2. [KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM. | #0 |
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1b1ed1a
(Get the code!)
This is a bug.
Test Environment:
Repro Steps:
1. Boot up guest using: -cpu Cascadelake-Server
[root@clx-2s2 yexin]# qemu-system-x86_64 -accel kvm -drive if=virtio,
char device redirected to /dev/pts/3 (label serial0)
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:ECX [bit 4]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:ECX [bit 4]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:ECX [bit 4]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:ECX [bit 4]
2. To check CPU ID related to features[
Expected Result: Both host and guest's CPUID.07H EDX bit 29 should be 1.
Actual Result:
Host's cpuid: 0x00000007 0x00: eax=0x00000000 ebx=0xd39ffffb ecx=0x00000818 edx=0xbc000000 (EDX bit 29=1)
Guest's cpuid : 0x00000007 0x00: eax=0x00000000 ebx=0xd19f0fb9 ecx=0x00000818 edx=0x84000000 (EDX bit 29=0)
Target Release: 19.10