From: Catalin Marinas <catalin.marinas@arm.com>
To: Beata Michalska <beata.michalska@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, will@kernel.org,
suzuki.poulose@arm.com, James.Morse@arm.com,
xuewen.yan94@gmail.com, seanwang1@lenovo.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64: errata: Add Cortex-A725 erratum 3821522 workaround
Date: Thu, 24 Sep 2026 15:55:32 +0100 [thread overview]
Message-ID: <arU55PEnc7Gjy830@arm.com> (raw)
In-Reply-To: <20260908104800.3744507-1-beata.michalska@arm.com>
Hi Beata,
On Tue, Sep 08, 2026 at 12:47:08PM +0200, Beata Michalska wrote:
> diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
> index b9eaf4ad70850..93f33ee078638 100644
> --- a/arch/arm64/include/asm/topology.h
> +++ b/arch/arm64/include/asm/topology.h
> @@ -17,6 +17,12 @@ int pcibus_to_node(struct pci_bus *bus);
>
> #include <linux/arch_topology.h>
>
> +static inline bool this_cpu_has_broken_amu_constcnt(void)
> +{
> + return this_cpu_has_cap(ARM64_WORKAROUND_2457168) ||
> + this_cpu_has_cap(ARM64_WORKAROUND_3821522);
> +}
Instead of this, please add ARM64_WORKAROUND_BROKEN_AMU_CONSTCNT and set
it in the .capability field of a multi-cap entry. We do the same with
ARM64_WORKAROUND_REPEAT_TLBI_SYNC.
--
Catalin
prev parent reply other threads:[~2026-09-24 14:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-08 10:47 Beata Michalska
2026-09-24 14:55 ` Catalin Marinas [this message]
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