** Also affects: qemu (Ubuntu Eoan)
Importance: Wishlist
Assignee: Rafael David Tinoco (rafaeldtinoco)
Status: Confirmed
** Also affects: linux (Ubuntu Eoan)
Importance: Wishlist
Status: Confirmed
** Also affects: qemu (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu Disco)
Status: New => Confirmed
** Changed in: qemu (Ubuntu Cosmic)
Status: New => Confirmed
** Changed in: qemu (Ubuntu Bionic)
Status: New => Confirmed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1828495
Title:
[KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM.
Status in intel:
New
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Confirmed
Status in linux source package in Bionic:
New
Status in qemu source package in Bionic:
Confirmed
Status in linux source package in Cosmic:
New
Status in qemu source package in Cosmic:
Confirmed
Status in linux source package in Disco:
New
Status in qemu source package in Disco:
Confirmed
Status in linux source package in Eoan:
Confirmed
Status in qemu source package in Eoan:
Confirmed
Bug description:
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,id=hd,file=/home/x/x,format=qcow2 -m 4096 -smp 4 -cpu
Cascadelake-Server -serial stdio
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[FEAT_7_0_EDX]
：CPUID_7_0_EDX_ARCH_CAPABILITIES
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)
Commit:2bdb76c015df7125783d8394d6339d181cb5bc30
Target Kerned: 5.1
Target Release: 19.10
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