From: Sasha Levin <sashal@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
tglx@linutronix.de, mingo@redhat.com,
dave.hansen@linux.intel.com, x86@kernel.org, puwen@hygon.cn,
seanjc@google.com, kim.phillips@amd.com, jmattson@google.com,
babu.moger@amd.com, peterz@infradead.org,
rick.p.edgecombe@intel.com, brgerst@gmail.com,
ashok.raj@intel.com, mjguzik@gmail.com, jpoimboe@kernel.org,
nik.borisov@suse.com, aik@amd.com, vegard.nossum@oracle.com,
daniel.sneddon@linux.intel.com, acdunlap@google.com,
Erwan Velu <erwanaliasr1@gmail.com>,
pavel@denx.de
Subject: Re: [PATCH AUTOSEL 5.15 11/12] x86/barrier: Do not serialize MSR accesses on AMD
Date: Thu, 28 Nov 2024 10:52:44 -0500 [thread overview]
Message-ID: <Z0iRzPpGvpeYzA4H@sashalap> (raw)
In-Reply-To: <20241128115924.GAZ0hbHKsbtCixVqAe@fat_crate.local>
On Thu, Nov 28, 2024 at 12:59:24PM +0100, Borislav Petkov wrote:
>Hey folks,
>
>On Mon, Jan 15, 2024 at 06:26:56PM -0500, Sasha Levin wrote:
>> From: "Borislav Petkov (AMD)" <bp@alien8.de>
>>
>> [ Upstream commit 04c3024560d3a14acd18d0a51a1d0a89d29b7eb5 ]
>>
>> AMD does not have the requirement for a synchronization barrier when
>> acccessing a certain group of MSRs. Do not incur that unnecessary
>> penalty there.
>
>Erwan just mentioned that this one is not in 6.1 and in 5.15. And I have mails
>about it getting picked up by AUTOSEL.
>
>Did the AI reconsider in the meantime?
You've missed the 5.10 mail :)
Pavel objected to it so I've dropped it: https://lore.kernel.org/all/Zbli7QIGVFT8EtO4@sashalap/
--
Thanks,
Sasha
next prev parent reply other threads:[~2024-11-28 15:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-15 23:26 [PATCH AUTOSEL 5.15 01/12] watch_queue: fix kcalloc() arguments order Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 02/12] powerpc/mm: Fix null-pointer dereference in pgtable_cache_add Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 03/12] arm64: irq: set the correct node for VMAP stack Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 04/12] drivers/perf: pmuv3: don't expose SW_INCR event in sysfs Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 05/12] powerpc: Fix build error due to is_valid_bugaddr() Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 06/12] powerpc/mm: Fix build failures due to arch_reserved_kernel_pages() Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 07/12] powerpc/64s: Fix CONFIG_NUMA=n build due to create_section_mapping() Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 08/12] x86/boot: Ignore NMIs during very early boot Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 09/12] powerpc: pmd_move_must_withdraw() is only needed for CONFIG_TRANSPARENT_HUGEPAGE Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 10/12] powerpc/lib: Validate size for vector operations Sasha Levin
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 11/12] x86/barrier: Do not serialize MSR accesses on AMD Sasha Levin
2024-11-28 11:59 ` Borislav Petkov
2024-11-28 15:52 ` Sasha Levin [this message]
2024-11-28 16:08 ` Erwan Velu
2024-11-28 16:43 ` Borislav Petkov
2024-11-29 0:21 ` Sasha Levin
2024-11-29 9:30 ` Erwan Velu
2024-11-29 13:33 ` Borislav Petkov
2024-11-29 15:37 ` Sasha Levin
2024-11-29 21:18 ` Erwan Velu
2024-11-29 13:30 ` Borislav Petkov
2024-11-29 9:45 ` Pavel Machek
2024-11-29 13:38 ` Sasha Levin
2024-11-29 20:34 ` Pavel Machek
2024-11-29 20:50 ` Sasha Levin
2024-11-29 21:27 ` Pavel Machek
2024-01-15 23:26 ` [PATCH AUTOSEL 5.15 12/12] x86/mce: Mark fatal MCE's page as poison to avoid panic in the kdump kernel Sasha Levin
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