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 9E433C4332F for ; Mon, 12 Dec 2022 12:33:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8J/UbeFBM4HCpwE9jC0ei/BWx2cuTvD6xb3GeZkdRZI=; b=PuAozE0Vsx1TJC 0xwAb10cG64ijvPKFx3xg6GY2kAy0cj/BeGvzrJp5xynBmNIdyMe8WfuWNU9ip1Udjmrdym7T1Y3G 5cxNt5iuBGziejVb5NRfs6xsvwktfZO5AYkpa856XpGSw5EfbEGzF/0kcT04HO75OWjEbcnWLwU0N 9DRiLgn25zANhRzKhxRSn9jUWjb7vCwxPxfMg7wF604wW6RNjnmtpvoj8pFmjb99AXrwchrbXyuxL //AwlzbOETesYYh8yObLU/Qrd328dYIB+nb2aDSQlTStSC12vHCfIMLC1QspusW+2BYVQcqMvzIkW nBbhZB32eP2TmJg4KR/A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p4hzH-00FaiF-MW; Mon, 12 Dec 2022 12:32:51 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1p4hzE-00Faf0-Di for linux-riscv@lists.infradead.org; Mon, 12 Dec 2022 12:32:50 +0000 Received: from p57b7793f.dip0.t-ipconnect.de ([87.183.121.63] helo=phil.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1p4hyl-00033o-D8; Mon, 12 Dec 2022 13:32:19 +0100 From: Heiko Stuebner To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Geert Uytterhoeven , Magnus Damm , Conor Dooley , Samuel Holland , Guo Ren , Rob Herring , Krzysztof Kozlowski , Prabhakar Cc: Jisheng Zhang , Atish Patra , Anup Patel , Andrew Jones , Nathan Chancellor , Philipp Tomsich , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: Re: [PATCH v5 1/6] riscv: asm: alternative-macros: Introduce ALTERNATIVE_3() macro Date: Mon, 12 Dec 2022 13:32:17 +0100 Message-ID: <8194084.DvuYhMxLoT@phil> In-Reply-To: <20221212115505.36770-2-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20221212115505.36770-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20221212115505.36770-2-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221212_043248_514091_786441EB X-CRM114-Status: GOOD ( 21.78 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Am Montag, 12. Dezember 2022, 12:55:00 CET schrieb Prabhakar: > From: Lad Prabhakar > > Introduce ALTERNATIVE_3() macro. > > A vendor wants to replace an old_content, but another vendor has used > ALTERNATIVE_2() to patch its customized content at the same location. > In this case, this vendor can use macro ALTERNATIVE_3() and then replace > ALTERNATIVE_2() with ALTERNATIVE_3() to append its customized content. > > While at it update comment above ALTERNATIVE_2() macro and make it generic > so that the comment holds good for any new addition of ALTERNATIVE_X() > macros. > > Signed-off-by: Lad Prabhakar Reviewed-by: Heiko Stuebner > --- > v4->v5 > * Rebased the patch on top of Andrew's series (now in Palmers for next-branch) > * Updated comment for ALTERNATIVE_x() as suggested by Heiko > > RFC v3 -> v4 > * New patch > --- > arch/riscv/include/asm/alternative-macros.h | 46 ++++++++++++++++++--- > 1 file changed, 41 insertions(+), 5 deletions(-) > > diff --git a/arch/riscv/include/asm/alternative-macros.h b/arch/riscv/include/asm/alternative-macros.h > index 7226e2462584..a5b4691520da 100644 > --- a/arch/riscv/include/asm/alternative-macros.h > +++ b/arch/riscv/include/asm/alternative-macros.h > @@ -50,8 +50,17 @@ > ALT_NEW_CONTENT \vendor_id_2, \errata_id_2, \enable_2, \new_c_2 > .endm > > +.macro ALTERNATIVE_CFG_3 old_c, new_c_1, vendor_id_1, errata_id_1, enable_1, \ > + new_c_2, vendor_id_2, errata_id_2, enable_2, \ > + new_c_3, vendor_id_3, errata_id_3, enable_3 > + ALTERNATIVE_CFG_2 \old_c, \new_c_1, \vendor_id_1, \errata_id_1, \enable_1, \ > + \new_c_2, \vendor_id_2, \errata_id_2, \enable_2 > + ALT_NEW_CONTENT \vendor_id_3, \errata_id_3, \enable_3, \new_c_3 > +.endm > + > #define __ALTERNATIVE_CFG(...) ALTERNATIVE_CFG __VA_ARGS__ > #define __ALTERNATIVE_CFG_2(...) ALTERNATIVE_CFG_2 __VA_ARGS__ > +#define __ALTERNATIVE_CFG_3(...) ALTERNATIVE_CFG_3 __VA_ARGS__ > > #else /* !__ASSEMBLY__ */ > > @@ -98,6 +107,13 @@ > __ALTERNATIVE_CFG(old_c, new_c_1, vendor_id_1, errata_id_1, enable_1) \ > ALT_NEW_CONTENT(vendor_id_2, errata_id_2, enable_2, new_c_2) > > +#define __ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, errata_id_1, enable_1, \ > + new_c_2, vendor_id_2, errata_id_2, enable_2, \ > + new_c_3, vendor_id_3, errata_id_3, enable_3) \ > + __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, enable_1, \ > + new_c_2, vendor_id_2, errata_id_2, enable_2) \ > + ALT_NEW_CONTENT(vendor_id_3, errata_id_3, enable_3, new_c_3) > + > #endif /* __ASSEMBLY__ */ > > #define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, CONFIG_k) \ > @@ -108,6 +124,13 @@ > __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, IS_ENABLED(CONFIG_k_1), \ > new_c_2, vendor_id_2, errata_id_2, IS_ENABLED(CONFIG_k_2)) > > +#define _ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, errata_id_1, CONFIG_k_1, \ > + new_c_2, vendor_id_2, errata_id_2, CONFIG_k_2, \ > + new_c_3, vendor_id_3, errata_id_3, CONFIG_k_3) \ > + __ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, errata_id_1, IS_ENABLED(CONFIG_k_1), \ > + new_c_2, vendor_id_2, errata_id_2, IS_ENABLED(CONFIG_k_2), \ > + new_c_3, vendor_id_3, errata_id_3, IS_ENABLED(CONFIG_k_3)) > + > #else /* CONFIG_RISCV_ALTERNATIVE */ > #ifdef __ASSEMBLY__ > > @@ -152,15 +175,28 @@ > _ALTERNATIVE_CFG(old_content, new_content, vendor_id, errata_id, CONFIG_k) > > /* > - * A vendor wants to replace an old_content, but another vendor has used > - * ALTERNATIVE() to patch its customized content at the same location. In > - * this case, this vendor can create a new macro ALTERNATIVE_2() based > - * on the following sample code and then replace ALTERNATIVE() with > - * ALTERNATIVE_2() to append its customized content. > + * ALTERNATIVE_x macros allow providing multiple replacement options > + * for an ALTERNATIVE code section. This is helpful if multiple > + * implementation variants for the same functionality exist for > + * different cpu cores. > + * > + * Usage: > + * ALTERNATIVE_x(old_content, > + * new_content1, vendor_id1, errata_id1, CONFIG_k1, > + * new_content2, vendor_id2, errata_id2, CONFIG_k2, > + * ... > + * new_contentx, vendor_idx, errata_idx, CONFIG_kx) > */ > #define ALTERNATIVE_2(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \ > new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2) \ > _ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \ > new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2) > > +#define ALTERNATIVE_3(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \ > + new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2, \ > + new_content_3, vendor_id_3, errata_id_3, CONFIG_k_3) \ > + _ALTERNATIVE_CFG_3(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \ > + new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2, \ > + new_content_3, vendor_id_3, errata_id_3, CONFIG_k_3) > + > #endif > _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv