From: Luwei Kang <luwei.kang@intel.com>
To: pbonzini@redhat.com, rth@twiddle.net, ehabkost@redhat.com
Cc: Luwei Kang <luwei.kang@intel.com>,
qemu-devel@nongnu.org, beeman.strong@intel.com
Subject: [PATCH v1 0/3] Remove the limitation of Intel PT CPUID info
Date: Tue, 25 Feb 2020 05:38:29 +0800 [thread overview]
Message-ID: <1582580312-19864-1-git-send-email-luwei.kang@intel.com> (raw)
The Intel PT feature includes some sub-features(CPUID.(EAX=14H,ECX=0H)) and
these sub-features are different on different HW platforms. To make the live
migration safety(get the same CPUID info with same cpu model on different HW
platform), the current Intel PT CPUID information is set to a constant
value(from ICELAKE Server).
It will block the new feature in the later HW platform. what's more, the
support of "IP payloads" will disable the Intel PT in KVM guest(patch 1) but
it will come soon.
This patchset remove this limitation and expose all the capabilities to
KVM guest. As it will break the live migration safe, Intel PT will be
masked as unmigratable.
Luwei Kang (3):
i386: Remove the limitation of IP payloads for Intel PT
i386: Remove the CPUID limitation of Intel PT
i386: Mark the 'INTEL_PT' CPUID bit as unmigratable
target/i386/cpu.c | 69 ++++---------------------------------------------------
1 file changed, 5 insertions(+), 64 deletions(-)
--
1.8.3.1
next reply other threads:[~2020-02-24 13:41 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 21:38 Luwei Kang [this message]
2020-02-24 21:38 ` [PATCH v1 1/3] i386: Remove the limitation of IP payloads for Intel PT Luwei Kang
2020-09-25 16:15 ` Eduardo Habkost
2020-09-25 16:42 ` Strong, Beeman
2020-09-25 16:54 ` Eduardo Habkost
2020-09-25 20:23 ` Paolo Bonzini
2020-09-25 20:29 ` Eduardo Habkost
2020-09-25 20:40 ` Paolo Bonzini
2020-09-28 5:19 ` Kang, Luwei
2020-09-28 7:35 ` Paolo Bonzini
2020-09-28 12:42 ` Kang, Luwei
2020-09-28 14:12 ` Eduardo Habkost
2020-09-29 2:28 ` Kang, Luwei
2020-09-29 3:44 ` Eduardo Habkost
2020-09-28 16:46 ` Paolo Bonzini
2020-09-29 2:28 ` Kang, Luwei
2020-02-24 21:38 ` [PATCH v1 2/3] i386: Remove the CPUID limitation of " Luwei Kang
2020-02-24 21:38 ` [PATCH v1 3/3] i386: Mark the 'INTEL_PT' CPUID bit as unmigratable Luwei Kang
2020-03-30 9:56 ` [PATCH v1 0/3] Remove the limitation of Intel PT CPUID info Kang, Luwei
2020-09-18 22:02 ` Eduardo Habkost
2020-09-21 7:49 ` Kang, Luwei
2020-09-21 16:50 ` Eduardo Habkost
2020-09-23 2:52 ` Kang, Luwei
2020-09-23 14:15 ` Eduardo Habkost
2020-09-24 12:47 ` Kang, Luwei
2020-09-24 13:34 ` Eduardo Habkost
2020-09-25 8:20 ` Kang, Luwei
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