Re: [PATCH AUTOSEL 6.17] x86/kexec: Disable kexec/kdump on platforms with TDX partial write erratum

[Sasha Levin <sashal@kernel.org>]

On Mon, Nov 03, 2025 at 09:26:38AM +0000, Huang, Kai wrote:
>On Sun, 2025-10-26 at 22:24 +0000, Huang, Kai wrote:
>> On Sat, 2025-10-25 at 11:58 -0400, Sasha Levin wrote:
>> > From: Kai Huang <kai.huang@intel.com>
>> >
>> > [ Upstream commit b18651f70ce0e45d52b9e66d9065b831b3f30784 ]
>> >
>> >
>>
>> [...]
>>
>> > ---
>> >
>> > LLM Generated explanations, may be completely bogus:
>> >
>> > YES
>> >
>> > **Why This Fix Matters**
>> > - Prevents machine checks during kexec/kdump on early TDX-capable
>> >   platforms with the “partial write to TDX private memory” erratum.
>> >   Without this, the new kernel may hit an MCE after the old kernel
>> >   jumps, which is a hard failure affecting users.
>>
>> Hi,
>>
>> I don't think we should backport this for 6.17 stable.  Kexec/kdump and
>> TDX are mutually exclusive in Kconfig in 6.17, therefore it's not possible
>> for TDX to impact kexec/kdump.
>>
>> This patch is part of the series which enables kexec/kdump together with
>> TDX in Kconfig (which landed in 6.18) and should not be backported alone.
>
>Hi Sasha,
>
>Just a reminder that this patch should be dropped from stable kernel too
>(just in case you missed, since I didn't get any further notice).

Now dropped, thanks!

-- 
Thanks,
Sasha