Re: [PATCH v2 1/1] x86/fred: Fix the FRED RSP0 MSR out of sync with its per-CPU cache

From: Xin Li
Date: Fri Jan 10 2025 - 13:17:19 EST


On 1/10/2025 10:09 AM, Dave Hansen wrote:
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) <xin@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx

Thanks for the update:

Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

I'll probably do a wee bit of testing today and apply to the urgent pile
early next week.


Sure, thanks a lot!