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 3/3] i386: Mark the 'INTEL_PT' CPUID bit as unmigratable
Date: Tue, 25 Feb 2020 05:38:32 +0800 [thread overview]
Message-ID: <1582580312-19864-4-git-send-email-luwei.kang@intel.com> (raw)
In-Reply-To: <1582580312-19864-1-git-send-email-luwei.kang@intel.com>
After expose all the capabilities of Intel PT to KVM guest, the guest Intel
PT CPUID information may difference with same guest cpu model on differnt
hardware. It will block the live migration. This patch will mark the Intel
PT feature as unmigratable.
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
---
target/i386/cpu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4d9e203..caee8b1 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1024,6 +1024,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.reg = R_EBX,
},
.tcg_features = TCG_7_0_EBX_FEATURES,
+ .unmigratable_flags = CPUID_7_0_EBX_INTEL_PT,
},
[FEAT_7_0_ECX] = {
.type = CPUID_FEATURE_WORD,
--
1.8.3.1
next prev parent 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 [PATCH v1 0/3] Remove the limitation of Intel PT CPUID info Luwei Kang
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 ` Luwei Kang [this message]
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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