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| author | Luwei Kang | 2020-03-12 17:48:06 +0100 |
|---|---|---|
| committer | Eduardo Habkost | 2020-04-01 00:13:32 +0200 |
| commit | ddc2fc9e4e42ebce48b088963dc7fbd1c08d5f33 (patch) | |
| tree | 9e43323226f0dc3ddf1f9b301ce59e120db43308 /include/exec/plugin-gen.h | |
| parent | i386: Fix pkg_id offset for EPYC cpu models (diff) | |
| download | qemu-ddc2fc9e4e42ebce48b088963dc7fbd1c08d5f33.tar.gz qemu-ddc2fc9e4e42ebce48b088963dc7fbd1c08d5f33.tar.xz qemu-ddc2fc9e4e42ebce48b088963dc7fbd1c08d5f33.zip | |
target/i386: set the CPUID level to 0x14 on old machine-type
The CPUID level need to be set to 0x14 manually on old
machine-type if Intel PT is enabled in guest. E.g. the
CPUID[0].EAX(level)=7 and CPUID[7].EBX[25](intel-pt)=1 when the
Qemu with "-machine pc-i440fx-3.1 -cpu qemu64,+intel-pt" parameter.
Some Intel PT capabilities are exposed by leaf 0x14 and the
missing capabilities will cause some MSRs access failed.
This patch add a warning message to inform the user to extend
the CPUID level.
Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Message-Id: <1584031686-16444-1-git-send-email-luwei.kang@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/exec/plugin-gen.h')
0 files changed, 0 insertions, 0 deletions