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From: Ingo Molnar <mingo@kernel.org>
To: "Xin Li (Intel)" <xin@zytor.com>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
	x86@kernel.org, hpa@zytor.com, peterz@infradead.org,
	andrew.cooper3@citrix.com
Subject: Re: [PATCH v3 1/1] x86/fred: Clear WFE in missing-ENDBRANCH #CPs
Date: Wed, 13 Nov 2024 10:56:03 +0100	[thread overview]
Message-ID: <ZzR3s78NZDIi1Rxh@gmail.com> (raw)
In-Reply-To: <20241113091313.3717338-1-xin@zytor.com>


* Xin Li (Intel) <xin@zytor.com> wrote:

> +/*
> + * By definition, all missing-ENDBRANCH #CPs are a result of WFE && !ENDBR.
> + *
> + * For the kernel IBT no ENDBR selftest where #CPs are deliberately triggerred,

s/triggerred
 /triggered

> +static void ibt_clear_fred_wfe(struct pt_regs *regs)
> +{
> +	/*
> +	 * No need to do any FRED checks.
> +	 *
> +	 * For IDT event delivery, the high-order 48 bits of CS are pushed
> +	 * as 0s into stack, and later IRET ignores these bits.

s/into stack
 /into the stack

Thanks,

	Ingo

  reply	other threads:[~2024-11-13  9:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-13  9:13 [PATCH v3 1/1] x86/fred: Clear WFE in missing-ENDBRANCH #CPs Xin Li (Intel)
2024-11-13  9:56 ` Ingo Molnar [this message]
2024-11-13 17:42   ` Xin Li
2024-11-13 17:49 ` Dave Hansen

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