From: will.deacon@arm•com (Will Deacon)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv2 3/4] arm64: cachetype: report weakest cache policy
Date: Wed, 18 Jun 2014 18:18:38 +0100 [thread overview]
Message-ID: <20140618171838.GG17851@arm.com> (raw)
In-Reply-To: <1403024674-25108-4-git-send-email-mark.rutland@arm.com>
On Tue, Jun 17, 2014 at 06:04:33PM +0100, Mark Rutland wrote:
> In big.LITTLE systems, the I-cache policy may differ across CPUs, and
> thus we must always meet the most stringent maintenance requirements of
> any I-cache in the system when performing maintenance to ensure
> correctness. Unfortunately this requirement is not met as we always look
> at the current CPU's cache type register to determine the maintenance
> requirements.
>
> This patch causes the I-cache policy of all CPUs to be taken into
> account for icache_is_aliasing and icache_is_aivivt. If any I-cache in
> the system is aliasing or AIVIVT, the respective function will return
> true. At boot each CPU may set flags to identify that at least one
> I-cache in the system is aliasing and/or AIVIVT.
>
> The now unused and potentially misleading icache_policy function is
> removed.
Ah, ok, you're growing cpuinfo.c. Ignore my earlier comment about deleting
the header then :)
Will
next prev parent reply other threads:[~2014-06-18 17:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-17 17:04 [PATCHv2 0/4] arm64: handle heterogeneous system register values Mark Rutland
2014-06-17 17:04 ` [PATCHv2 1/4] arm64: add MIDR_EL1 field accessors Mark Rutland
2014-06-17 17:04 ` [PATCHv2 2/4] arm64: cpuinfo: print info for all CPUs Mark Rutland
2014-06-18 17:15 ` Will Deacon
2014-06-19 10:56 ` Mark Rutland
2014-06-18 18:29 ` Ard Biesheuvel
2014-06-19 11:31 ` Mark Rutland
2014-06-19 12:54 ` Ard Biesheuvel
2014-06-17 17:04 ` [PATCHv2 3/4] arm64: cachetype: report weakest cache policy Mark Rutland
2014-06-18 17:18 ` Will Deacon [this message]
2014-06-17 17:04 ` [PATCHv2 4/4] arm64: add runtime system sanity checks Mark Rutland
2014-06-18 17:20 ` Will Deacon
2014-06-19 12:33 ` Mark Rutland
2014-06-18 17:23 ` [PATCHv2 0/4] arm64: handle heterogeneous system register values Will Deacon
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