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X-CSE-ConnectionGUID: H4Sa73kJTuSV9SiSSHkHmg== X-CSE-MsgGUID: lo8YSei9QbCShaXL0EqtcQ== X-IronPort-AV: E=McAfee;i="6700,10204,11311"; a="48249685" X-IronPort-AV: E=Sophos;i="6.12,303,1728975600"; d="scan'208";a="48249685" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jan 2025 10:09:35 -0800 X-CSE-ConnectionGUID: saazU/KFSZSskiz2095HBA== X-CSE-MsgGUID: 0fPdwkL4TKClf/mkbjxI0w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,303,1728975600"; d="scan'208";a="103852898" Received: from bjrankin-mobl3.amr.corp.intel.com (HELO [10.124.222.149]) ([10.124.222.149]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jan 2025 10:09:35 -0800 Message-ID: <296bc51f-0668-4ef8-869b-8089ea6e9766@intel.com> Date: Fri, 10 Jan 2025 10:09:35 -0800 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/1] x86/fred: Fix the FRED RSP0 MSR out of sync with its per-CPU cache To: "Xin Li (Intel)" , linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, andrew.cooper3@citrix.com References: <20250110174639.1250829-1-xin@zytor.com> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/10/25 09:46, Xin Li (Intel) wrote: ...> Fix the bug through resynchronizing the FRED RSP0 MSR with its > per-CPU cache in cpu_init_fred_exceptions(). > > Fixes: fe85ee391966 ("x86/entry: Set FRED RSP0 on return to userspace instead of context switch") > Signed-off-by: Xin Li (Intel) > Cc: stable@vger.kernel.org Thanks for the update: Acked-by: Dave Hansen I'll probably do a wee bit of testing today and apply to the urgent pile early next week.