From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
hpa@zytor.com
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Sean Christopherson <sean.j.christopherson@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
luto@kernel.org, Peter Zijlstra <peterz@infradead.org>,
Arvind Sankar <nivedita@alum.mit.edu>,
Fenghua Yu <fenghua.yu@intel.com>,
Tony Luck <tony.luck@intel.com>,
Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [PATCH v7 0/2] Fix and optimization of split_lock_detection
Date: Wed, 25 Mar 2020 11:09:22 +0800 [thread overview]
Message-ID: <20200325030924.132881-1-xiaoyao.li@intel.com> (raw)
This series is split from "[PATCH v6 0/8] x86/split_lock: Fix and
virtualization of split lock detection"[1]. It contains one fix for the
initialization flow of split_lock_detection and one optimiazation for
runtime TEST_CTRL MSR access.
Other patches of [1] needs more time to improve.
Thanks.
[1]: https://lore.kernel.org/kvm/20200324151859.31068-1-xiaoyao.li@intel.com/
Changes in v7:
- only pick patch 1 and patch 2, and hold all the left.
- Update SLD bit on each processor based on sld_state.
Changes in v6:
- Drop the sld_not_exist flag and use X86_FEATURE_SPLIT_LOCK_DETECT to
check whether need to init split lock detection. [tglx]
- Use tglx's method to verify the existence of split lock detectoin.
- small optimization of sld_update_msr() that the default value of
msr_test_ctrl_cache has split_lock_detect bit cleared.
- Drop the patch3 in v5 that introducing kvm_only option. [tglx]
- Rebase patch4-8 to kvm/queue.
- use the new kvm-cpu-cap to expose X86_FEATURE_CORE_CAPABILITIES in
Patch 6.
Changes in v5:
- Use X86_FEATURE_SPLIT_LOCK_DETECT flag in kvm to ensure split lock
detection is really supported.
- Add and export sld related helper functions in their related usecase
kvm patches.
Changes in v4:
- Add patch 1 to rework the initialization flow of split lock
detection.
- Drop percpu MSR_TEST_CTRL cache, just use a static variable to cache
the reserved/unused bit of MSR_TEST_CTRL. [Sean]
- Add new option for split_lock_detect kernel param.
- Changlog refinement. [Sean]
- Add a new patch to enable MSR_TEST_CTRL for intel guest. [Sean]
Xiaoyao Li (2):
x86/split_lock: Rework the initialization flow of split lock detection
x86/split_lock: Avoid runtime reads of the TEST_CTRL MSR
arch/x86/kernel/cpu/intel.c | 85 +++++++++++++++++++++----------------
1 file changed, 48 insertions(+), 37 deletions(-)
--
2.20.1
next reply other threads:[~2020-03-25 3:27 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 3:09 Xiaoyao Li [this message]
2020-03-25 3:09 ` [PATCH v7 1/2] x86/split_lock: Rework the initialization flow of split lock detection Xiaoyao Li
2020-03-28 16:32 ` Sean Christopherson
2020-03-30 13:26 ` Xiaoyao Li
2020-03-30 14:26 ` Sean Christopherson
2020-03-25 3:09 ` [PATCH v7 2/2] x86/split_lock: Avoid runtime reads of the TEST_CTRL MSR Xiaoyao Li
2020-03-28 16:34 ` Sean Christopherson
2020-03-29 9:13 ` Xiaoyao Li
2020-03-30 18:18 ` Sean Christopherson
2020-04-03 17:44 ` [PATCH 0/1] x86/split_lock: check split lock feature on initialization Benjamin Lamowski
2020-04-03 17:44 ` [PATCH 1/1] " Benjamin Lamowski
2020-04-03 18:01 ` Sean Christopherson
2020-04-06 8:23 ` Benjamin Lamowski
2020-04-06 11:48 ` Xiaoyao Li
2020-04-06 15:57 ` [PATCH v2 0/1] x86/split_lock: check split lock support " Benjamin Lamowski
2020-04-06 16:02 ` [PATCH v2 1/1] " Benjamin Lamowski
2020-04-06 16:17 ` [PATCH v3 " Benjamin Lamowski
2020-04-06 21:24 ` Thomas Gleixner
2020-04-06 21:21 ` [PATCH 0/1] x86/split_lock: check split lock feature " Thomas Gleixner
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