From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] ARM: tlb: add branch predictor maintenance operations
Date: Mon, 25 Feb 2013 16:31:28 +0000 [thread overview]
Message-ID: <20130225163128.GD612@arm.com> (raw)
In-Reply-To: <1361805688-8886-1-git-send-email-will.deacon@arm.com>
On Mon, Feb 25, 2013 at 03:21:27PM +0000, Will Deacon wrote:
> The ARM architecture requires explicit branch predictor maintenance
> when updating an instruction stream for a given virtual address. In
> reality, this isn't so much of a burden because the branch predictor
> is flushed during the cache maintenance required to make the new
> instructions visible to the I-side of the processor.
>
> However, there are still some cases where explicit flushing is required,
> so add a local_bp_flush_all operation to deal with this.
>
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
prev parent reply other threads:[~2013-02-25 16:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-25 15:21 [PATCH 1/2] ARM: tlb: add branch predictor maintenance operations Will Deacon
2013-02-25 15:21 ` [PATCH 2/2] ARM: mm: perform explicit branch predictor maintenance when required Will Deacon
2013-02-25 16:31 ` Catalin Marinas
2013-02-25 16:31 ` Catalin Marinas [this message]
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