From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A8EE6D6ACEE for ; Thu, 18 Dec 2025 12:13:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IPevCW7psI+L/N76SvZrEOm+nUa7ue/0Fvi/NIm1aNo=; b=RmCVXoNAKqwox/Rid7ToRgqj2g J4M7UqBtApgSyL6K/uJzU+9Ng2aU2MslNf66vInEHD5a9I+uMAPL7Tpp2uWfF9oCCsZJ33Syylnx0 FUp5xvSdR3w2Oc5LgP/x84WaFmf70fWGfhvKeWJ63bdIt/GbB2VUiWgUCOd3kprXMqVn704n2izbM aC0jFtr8tzHGOYHl2fGeCXQoYiqXzQJCK0S+nzmh9kGcwh9vqwhInTA3A2B+v7cy2t54SkMvSlJqa 7eI768jfhDqKZmVTkLUwnfJA664qdF1NAh2bvssFxHTDGFIlJl7bLwGcE3kd3S1qtJf4Qozn2d+Th mhzwJpzg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vWCsw-00000008PWc-0ROF; Thu, 18 Dec 2025 12:13:34 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vWCsu-00000008PW9-2Fde for linux-arm-kernel@lists.infradead.org; Thu, 18 Dec 2025 12:13:33 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 5E19C4177E; Thu, 18 Dec 2025 12:13:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CB30C4CEFB; Thu, 18 Dec 2025 12:13:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1766060011; bh=QjcyqYgAAiCVwktzssjIvKksa8RRHKln7unjqaGozug=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FqTCY3LZvoQPHjGcorl9DXffWz6ePn53FCjtqjWN+Lk3rtHtrsab4QLd2aT+Tygv7 UZHbk8n4YTGjKfSaiN+Sk6tDk3Rr5Z4amciKYFjyj0vf9FO8o8ZMpZJwiVTr5xPJK/ iXhqbj82swpKH+BwHcMtpl9MoZpOapQu822X4DvBynPxv75i9eCiaAEyZkQXyJ1KjB lh4BbbWNQGFcXUyxFS0Lq/fgY8gBENJ7fdLqIrIo8HrFEgfNUnz8h8ci5ty8B60W75 arKbFNHHlyfpLosVXe6kUxPRFwSoHeTVPtaVohyLzY4ek7B6h5wt4depCLldeyIjks 8OGMl3sx8v09w== Date: Thu, 18 Dec 2025 12:13:25 +0000 From: Will Deacon To: Ahmed Tiba Cc: linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, tony.luck@intel.com, bp@alien8.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, rafael@kernel.org, linux-doc@vger.kernel.org, Dmitry.Lamerov@arm.com, Michael.Zhao2@arm.com Subject: Re: [PATCH 11/12] ras: add DeviceTree estatus provider driver Message-ID: References: <20251217112845.1814119-1-ahmed.tiba@arm.com> <20251217112845.1814119-12-ahmed.tiba@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251217112845.1814119-12-ahmed.tiba@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251218_041332_597375_E5774694 X-CRM114-Status: GOOD ( 19.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Dec 17, 2025 at 11:28:44AM +0000, Ahmed Tiba wrote: > Introduce a platform driver that maps the CPER status block described > in DeviceTree, feeds it into the estatus core and handles either IRQ- or > poll-driven notifications. Arm64 gains a FIX_ESTATUS_IRQ slot so the > driver can safely map the shared buffer while copying records. > > Signed-off-by: Ahmed Tiba > --- > MAINTAINERS | 1 + > arch/arm64/include/asm/fixmap.h | 5 + > drivers/ras/Kconfig | 14 ++ > drivers/ras/Makefile | 1 + > drivers/ras/estatus-dt.c | 318 ++++++++++++++++++++++++++++++++ > include/linux/estatus.h | 3 +- > 6 files changed, 341 insertions(+), 1 deletion(-) > create mode 100644 drivers/ras/estatus-dt.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 6b2ef2ddc0c7..5567d5e82053 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -21761,6 +21761,7 @@ RAS ERROR STATUS > M: Ahmed Tiba > S: Maintained > F: Documentation/devicetree/bindings/ras/arm,ras-ffh.yaml > +F: drivers/ras/estatus-dt.c > F: drivers/firmware/efi/estatus.c > F: include/linux/estatus.h > > diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h > index 65555284446e..85ffba87bab9 100644 > --- a/arch/arm64/include/asm/fixmap.h > +++ b/arch/arm64/include/asm/fixmap.h > @@ -64,6 +64,11 @@ enum fixed_addresses { > #endif > #endif /* CONFIG_ACPI_APEI_GHES */ > > +#ifdef CONFIG_RAS_ESTATUS_DT > + /* Used for ESTATUS mapping from assorted contexts */ > + FIX_ESTATUS_IRQ, > +#endif /* CONFIG_RAS_ESTATUS_DT */ Why do we need this in addition to the four existing GHES slots? The DT code doesn't use it and I was assuming that the ACPI code would continue to use the existing irq; is that not the case? Will