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 714E3C55ABA for ; Wed, 5 Aug 2026 07:30:59 +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:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=C0ogknZifwHUHqlmbzAZ1WlG35CJPpu3eT3NUulJv6o=; b=bFgzJ79alG2iH0lbfaqISczAVw aplN6TzL3okZS/ekFWdZNvJfpSpq/c+qzJMt6T9CbQn3QkJfb2fDUvIhuzKeI+KaZqi6mlsGho8b8 RXCDb0HZ037TyUJveqVuqKnR97kXvu8m33gJ0bWfGNCCF45tHM+0mmUezIMUm5mQFGIrK+kX0lbGq DbqAEUYuFOUAtOI3aNtorc3AS8j5/a9az/EtNL0IqOFtsy90hbO6pInrxJrK9JZemObMDshfrXEIo 9IfgpX3py4+zxNX1ALsNKCtng8ZV/qzVNj9q7Ec8IzCydzJJRZO2+a4834d/ubAZSxFMMFud+i0TX nnI5bALg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrW5P-00000003PYz-0nsL; Wed, 05 Aug 2026 07:30:47 +0000 Received: from out-184.mta0.migadu.com ([2001:41d0:1004:224b::b8]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrW5M-00000003PXh-1cZX for linux-arm-kernel@lists.infradead.org; Wed, 05 Aug 2026 07:30:46 +0000 Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1785915038; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C0ogknZifwHUHqlmbzAZ1WlG35CJPpu3eT3NUulJv6o=; b=n2D9a/hPBedAD8LSevbLI9iOrECg0VzUuxk15L+oUg4Gxckz/WqTaOWBOFJKCLi6KMXA/b uFj0HYIgYTn3t2qwRBzFCPEGH0Cl7yQ53K9pWgI3N3k6xhdTweCMlkCpjPEdSyXfzaWwaW gNxMRFTwkwVHxMAa8XdeevrZpFeypyM= Date: Wed, 5 Aug 2026 00:30:31 -0700 MIME-Version: 1.0 Subject: Re: [PATCH v8 02/22] RISC-V: Add Sxcsrind ISA extension CSR definitions To: Paul Walmsley Cc: Jiri Olsa , Mark Rutland , Rob Herring , Anup Patel , Namhyung Kim , Arnaldo Carvalho de Melo , Krzysztof Kozlowski , Ian Rogers , Will Deacon , James Clark , linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-perf-users@vger.kernel.org, Conor Dooley References: <20260701-counter_delegation-v8-0-7909f863a645@meta.com> <20260701-counter_delegation-v8-2-7909f863a645@meta.com> <3d1f698c-6b76-5252-4e8f-b61671e309c7@kernel.org> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Atish Patra In-Reply-To: <3d1f698c-6b76-5252-4e8f-b61671e309c7@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260805_003044_846762_3C343A47 X-CRM114-Status: GOOD ( 22.75 ) 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 8/4/26 4:35 PM, Paul Walmsley wrote: > On Wed, 1 Jul 2026, Atish Patra wrote: > >> From: Kaiwen Xue >> >> This adds definitions of new CSRs and bits defined in Sxcsrind ISA >> extension. These CSR enables indirect accesses mechanism to access >> any CSRs in M-, S-, and VS-mode. The range of the select values >> and ireg will be define by the ISA extension using Sxcsrind extension. >> >> Signed-off-by: Kaiwen Xue >> Reviewed-by: Clément Léger >> Signed-off-by: Atish Patra > > Thanks. It's easier for folks to grep and cross-reference if the official > RISC-V extension names are used whenever possible, rather than something > like Sxcsrind. Queued the following patch for v7.3. > Agreed. Thanks! > > - Paul > > > RISC-V: Add Smcsrind and Sscrind ISA extension CSR definitions > > From: Kaiwen Xue > > This adds definitions of new CSRs and bits defined in the Smcsrind and > Sscrinq ISA extensions. These CSRs enable the indirect CSR accesses > mechanism to access any indirect CSRs in M-, S-, and VS-mode. The > range of the select values and ireg will be defined by the ISA > extension that are based on the Smcsrind and Sscsrind extensions. > > Signed-off-by: Kaiwen Xue > Reviewed-by: Clément Léger > Signed-off-by: Atish Patra > Reviewed-by: Charlie Jenkins > Tested-by: Charlie Jenkins > Link: https://patch.msgid.link/20260701-counter_delegation-v8-2-7909f863a645@meta.com > [pjw@kernel.org: clean up the patch description; use official RISC-V extension names] > Signed-off-by: Paul Walmsley > --- > arch/riscv/include/asm/csr.h | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h > index 31b8988f4488..7f09e54a0f9a 100644 > --- a/arch/riscv/include/asm/csr.h > +++ b/arch/riscv/include/asm/csr.h > @@ -347,6 +347,12 @@ > /* Supervisor-Level Window to Indirectly Accessed Registers (AIA) */ > #define CSR_SISELECT 0x150 > #define CSR_SIREG 0x151 > +/* Supervisor-Level Window to Indirectly Accessed Registers (Sscsrind) */ > +#define CSR_SIREG2 0x152 > +#define CSR_SIREG3 0x153 > +#define CSR_SIREG4 0x155 > +#define CSR_SIREG5 0x156 > +#define CSR_SIREG6 0x157 > > /* Supervisor-Level Interrupts (AIA) */ > #define CSR_STOPEI 0x15c > @@ -394,6 +400,14 @@ > /* VS-Level Window to Indirectly Accessed Registers (H-extension with AIA) */ > #define CSR_VSISELECT 0x250 > #define CSR_VSIREG 0x251 > +/* > + * VS-Level Window to Indirectly Accessed Registers (H-extension with Sscsrind) > + */ > +#define CSR_VSIREG2 0x252 > +#define CSR_VSIREG3 0x253 > +#define CSR_VSIREG4 0x255 > +#define CSR_VSIREG5 0x256 > +#define CSR_VSIREG6 0x257 > > /* VS-Level Interrupts (H-extension with AIA) */ > #define CSR_VSTOPEI 0x25c > @@ -436,6 +450,12 @@ > /* Machine-Level Window to Indirectly Accessed Registers (AIA) */ > #define CSR_MISELECT 0x350 > #define CSR_MIREG 0x351 > +/* Machine-Level Window to Indirectly Accessed Registers (Smcsrind) */ > +#define CSR_MIREG2 0x352 > +#define CSR_MIREG3 0x353 > +#define CSR_MIREG4 0x355 > +#define CSR_MIREG5 0x356 > +#define CSR_MIREG6 0x357 > > /* Machine-Level Interrupts (AIA) */ > #define CSR_MTOPEI 0x35c > @@ -498,6 +518,11 @@ > # define CSR_IEH CSR_MIEH > # define CSR_ISELECT CSR_MISELECT > # define CSR_IREG CSR_MIREG > +# define CSR_IREG2 CSR_MIREG2 > +# define CSR_IREG3 CSR_MIREG3 > +# define CSR_IREG4 CSR_MIREG4 > +# define CSR_IREG5 CSR_MIREG5 > +# define CSR_IREG6 CSR_MIREG6 > # define CSR_IPH CSR_MIPH > # define CSR_TOPEI CSR_MTOPEI > # define CSR_TOPI CSR_MTOPI > @@ -523,6 +548,11 @@ > # define CSR_IEH CSR_SIEH > # define CSR_ISELECT CSR_SISELECT > # define CSR_IREG CSR_SIREG > +# define CSR_IREG2 CSR_SIREG2 > +# define CSR_IREG3 CSR_SIREG3 > +# define CSR_IREG4 CSR_SIREG4 > +# define CSR_IREG5 CSR_SIREG5 > +# define CSR_IREG6 CSR_SIREG6 > # define CSR_IPH CSR_SIPH > # define CSR_TOPEI CSR_STOPEI > # define CSR_TOPI CSR_STOPI > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv