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 02DAEC6FD18 for ; Fri, 31 Mar 2023 13:43:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: 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=iExj+q60SsXijME0+oKshiApnb7zUHFaHlt5ZPVuHw0=; b=3vB9wde5CcPAs6 Rh1hxMhaxaIzeknWhRTgYpNyhXkjhU9EKvVhOiECcY1opoSUmzzbBDn+xZegmOt1XVYAJERHlak+Z Yju9dGHtsMkYDLz5hPBYNaf4mcT4JxF89c9jHKiI7Oz4sYpRUV1Dh8Ow43AEA/uV3902gKRiXFhMa NQYGmtG/C5+nKiIMJwOKKphu5JiXgCqEW1cbXc02pGuIVhXozT+ODRZh2qHxBKybV4gMPU0Ko/Gi0 hQmCPZC5eMQTzUI2+2T6aJYF16bxEgyAo2aGksivvdjZpQuA02KwC7VfMIxEmwieyradFeYQ9IZMB /LNWc+cf+OFLHwUcRTJw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1piF2l-007Z8y-1P; Fri, 31 Mar 2023 13:43:51 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1piF2i-007Z7o-0P; Fri, 31 Mar 2023 13:43:49 +0000 Received: from ip4d1634d3.dynamic.kabel-deutschland.de ([77.22.52.211] helo=diego.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 1piF2f-0003yC-9f; Fri, 31 Mar 2023 15:43:45 +0200 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: linux-riscv@lists.infradead.org, palmer@dabbelt.com, anup@brainfault.org, atishp@atishpatra.org, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org Cc: vineetg@rivosinc.com, greentime.hu@sifive.com, guoren@linux.alibaba.com, Andy Chiu , Paul Walmsley , Albert Ou , Conor Dooley , Guo Ren , Vincent Chen , Andrew Bresticker , Andy Chiu Subject: Re: [PATCH -next v17 15/20] riscv: signal: validate altstack to reflect Vector Date: Fri, 31 Mar 2023 15:43:44 +0200 Message-ID: <2623949.BddDVKsqQX@diego> In-Reply-To: <20230327164941.20491-16-andy.chiu@sifive.com> References: <20230327164941.20491-1-andy.chiu@sifive.com> <20230327164941.20491-16-andy.chiu@sifive.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230331_064348_162149_98056DC2 X-CRM114-Status: GOOD ( 10.92 ) 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="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Am Montag, 27. M=E4rz 2023, 18:49:35 CEST schrieb Andy Chiu: > Some extensions, such as Vector, dynamically change footprint on a > signal frame, so MINSIGSTKSZ is no longer accurate. For example, an > RV64V implementation with vlen =3D 512 may occupy 2K + 40 + 12 Bytes of a > signal frame with the upcoming support. And processes that do not > execute any vector instructions do not need to reserve the extra > sigframe. So we need a way to guard the allocation size of the sigframe > at process runtime according to current status of V. > = > Thus, provide the function sigaltstack_size_valid() to validate its size > based on current allocation status of supported extensions. > = > Signed-off-by: Andy Chiu > Reviewed-by: Conor Dooley Reviewed-by: Heiko Stuebner Tested-by: Heiko Stuebner _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv