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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58317C10DCE for ; Sun, 8 Mar 2020 09:53:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 32AD420838 for ; Sun, 8 Mar 2020 09:53:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583661234; bh=vOPL8owgSgHX9PhVmLyiyNWhrKKGWBWr9Xmd6jc428Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EAmqXTEs1VP1FLPC0IiSkWoJCSAZLOswLi1oGBzGTCsploe/fRgdu1i6sQ/z8atWG ovfoaqefK1RhG0wX9o3EEaqa2sFNcnTdYczJ0ECH294DaaAWZEvOYfz3OXQpPjO7pi UR6jdjpM7MSkwKiSMPWL4Q7IvXr62l95Yicn3hLc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726698AbgCHJxw (ORCPT ); Sun, 8 Mar 2020 05:53:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:38182 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726674AbgCHJxt (ORCPT ); Sun, 8 Mar 2020 05:53:49 -0400 Received: from localhost.localdomain (unknown [89.208.247.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 98AFD2084E; Sun, 8 Mar 2020 09:53:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583661228; bh=vOPL8owgSgHX9PhVmLyiyNWhrKKGWBWr9Xmd6jc428Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ILwKeyhsd6982qjaUQJRvl39FmYnrOLOuWH1SlhJ59HzVUtZHnuy6I0NtkIEOY4lf iVTai79VidqtS7UMB2Zyi7M4n9NYwRYygwzj+eQOFfqCdD4I+himIPosKG8D2XwBiz hd8KYJJxgSShjgWRn+8BwX2MjB3PNCgz0xugvjfY= From: guoren@kernel.org To: paul.walmsley@sifive.com, palmer@dabbelt.com, Anup.Patel@wdc.com, greentime.hu@sifive.com Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, arnd@arndb.de, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren , Dave Martin Subject: [RFC PATCH V3 11/11] riscv: Add sigcontext save/restore Date: Sun, 8 Mar 2020 17:49:54 +0800 Message-Id: <20200308094954.13258-12-guoren@kernel.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20200308094954.13258-1-guoren@kernel.org> References: <20200308094954.13258-1-guoren@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren This patch add sigcontext save/restore and it's very similar to fpu. Signed-off-by: Guo Ren --- arch/riscv/include/uapi/asm/sigcontext.h | 1 + arch/riscv/kernel/signal.c | 40 ++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/arch/riscv/include/uapi/asm/sigcontext.h b/arch/riscv/include/uapi/asm/sigcontext.h index 84f2dfcfdbce..f74b3c814423 100644 --- a/arch/riscv/include/uapi/asm/sigcontext.h +++ b/arch/riscv/include/uapi/asm/sigcontext.h @@ -17,6 +17,7 @@ struct sigcontext { struct user_regs_struct sc_regs; union __riscv_fp_state sc_fpregs; + struct __riscv_v_state sc_vregs; }; #endif /* _UAPI_ASM_RISCV_SIGCONTEXT_H */ diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c index 17ba190e84a5..4295c00e8934 100644 --- a/arch/riscv/kernel/signal.c +++ b/arch/riscv/kernel/signal.c @@ -83,6 +83,40 @@ static long save_fp_state(struct pt_regs *regs, #define restore_fp_state(task, regs) (0) #endif +#ifdef CONFIG_VECTOR +static long restore_v_state(struct pt_regs *regs, + struct __riscv_v_state *sc_vregs) +{ + long err; + struct __riscv_v_state __user *state = sc_vregs; + + err = __copy_from_user(¤t->thread.vstate, state, sizeof(*state)); + if (unlikely(err)) + return err; + + vstate_restore(current, regs); + + return err; +} + +static long save_v_state(struct pt_regs *regs, + struct __riscv_v_state *sc_vregs) +{ + long err; + struct __riscv_v_state __user *state = sc_vregs; + + vstate_save(current, regs); + err = __copy_to_user(state, ¤t->thread.vstate, sizeof(*state)); + if (unlikely(err)) + return err; + + return err; +} +#else +#define save_v_state(task, regs) (0) +#define restore_v_state(task, regs) (0) +#endif + static long restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) { @@ -92,6 +126,9 @@ static long restore_sigcontext(struct pt_regs *regs, /* Restore the floating-point state. */ if (has_fpu) err |= restore_fp_state(regs, &sc->sc_fpregs); + /* Restore the vector state. */ + if (has_vector) + err |= restore_v_state(regs, &sc->sc_vregs); return err; } @@ -145,6 +182,9 @@ static long setup_sigcontext(struct rt_sigframe __user *frame, /* Save the floating-point state. */ if (has_fpu) err |= save_fp_state(regs, &sc->sc_fpregs); + /* Save the vector state. */ + if (has_vector) + err |= save_v_state(regs, &sc->sc_vregs); return err; } -- 2.17.0