From patchwork Mon Nov 22 10:41:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: WANG Xuerui X-Patchwork-Id: 12631651 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 A51DDC433EF for ; Mon, 22 Nov 2021 11:05:42 +0000 (UTC) Received: from localhost ([::1]:33216 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mp78n-0005UW-Dp for qemu-devel@archiver.kernel.org; Mon, 22 Nov 2021 06:05:41 -0500 Received: from eggs.gnu.org ([209.51.188.92]:52998) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mp6nK-00021N-KA for qemu-devel@nongnu.org; Mon, 22 Nov 2021 05:43:31 -0500 Received: from mail.xen0n.name ([115.28.160.31]:40910 helo=mailbox.box.xen0n.name) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mp6nH-0007jE-I5 for qemu-devel@nongnu.org; Mon, 22 Nov 2021 05:43:29 -0500 Received: from ld50.lan (unknown [101.88.31.179]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id 109C060B06; Mon, 22 Nov 2021 18:42:57 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=xen0n.name; s=mail; t=1637577777; bh=+tCsZdQ6ZeNhw8D7eZAlpg/oDAvz/nVal5eMOpr0is4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iOrNhClWukmy3zokhsC9R3eb1eAzY74fQFG2EsgDja0V/qxRGr5WAuTOVIoUQdieI fQ/HNVRhWKTsVapQy+5yGIhDRizVp+ogwzOIEtnna3QQuzZaLJRT+cKa55j17d3Tqt 1WV+YbzbwUApndwjYElbd/Z2ztRtpwKlzRm1rGOU= From: WANG Xuerui To: qemu-devel@nongnu.org Subject: [PATCH v7 29/31] accel/tcg/user-exec: Implement CPU-specific signal handler for loongarch64 hosts Date: Mon, 22 Nov 2021 18:41:59 +0800 Message-Id: <20211122104201.112695-30-git@xen0n.name> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211122104201.112695-1-git@xen0n.name> References: <20211122104201.112695-1-git@xen0n.name> MIME-Version: 1.0 Received-SPF: pass client-ip=115.28.160.31; envelope-from=git@xen0n.name; helo=mailbox.box.xen0n.name X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , XiaoJuan Yang , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , Laurent Vivier , WANG Xuerui , =?utf-8?q?Alex_Benn=C3=A9e?= , Song Gao Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: WANG Xuerui Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé --- linux-user/host/loongarch64/host-signal.h | 82 +++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 linux-user/host/loongarch64/host-signal.h diff --git a/linux-user/host/loongarch64/host-signal.h b/linux-user/host/loongarch64/host-signal.h new file mode 100644 index 0000000000..5fa993f7e7 --- /dev/null +++ b/linux-user/host/loongarch64/host-signal.h @@ -0,0 +1,82 @@ +/* + * host-signal.h: signal info dependent on the host architecture + * + * Copyright (c) 2003-2005 Fabrice Bellard + * Copyright (c) 2021 WANG Xuerui + * + * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef LOONGARCH64_HOST_SIGNAL_H +#define LOONGARCH64_HOST_SIGNAL_H + +static inline uintptr_t host_signal_pc(ucontext_t *uc) +{ + return uc->uc_mcontext.__pc; +} + +static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) +{ + const uint32_t *pinsn = (const uint32_t *)host_signal_pc(uc); + uint32_t insn = pinsn[0]; + + /* Detect store by reading the instruction at the program counter. */ + switch ((insn >> 26) & 0b111111) { + case 0b001000: /* {ll,sc}.[wd] */ + switch ((insn >> 24) & 0b11) { + case 0b01: /* sc.w */ + case 0b11: /* sc.d */ + return true; + } + break; + case 0b001001: /* {ld,st}ox4.[wd] ({ld,st}ptr.[wd]) */ + switch ((insn >> 24) & 0b11) { + case 0b01: /* stox4.w (stptr.w) */ + case 0b11: /* stox4.d (stptr.d) */ + return true; + } + break; + case 0b001010: /* {ld,st}.* family */ + switch ((insn >> 22) & 0b1111) { + case 0b0100: /* st.b */ + case 0b0101: /* st.h */ + case 0b0110: /* st.w */ + case 0b0111: /* st.d */ + case 0b1101: /* fst.s */ + case 0b1111: /* fst.d */ + return true; + } + break; + case 0b001110: /* indexed, atomic, bounds-checking memory operations */ + uint32_t sel = (insn >> 15) & 0b11111111111; + + switch (sel) { + case 0b00000100000: /* stx.b */ + case 0b00000101000: /* stx.h */ + case 0b00000110000: /* stx.w */ + case 0b00000111000: /* stx.d */ + case 0b00001110000: /* fstx.s */ + case 0b00001111000: /* fstx.d */ + case 0b00011101100: /* fstgt.s */ + case 0b00011101101: /* fstgt.d */ + case 0b00011101110: /* fstle.s */ + case 0b00011101111: /* fstle.d */ + case 0b00011111000: /* stgt.b */ + case 0b00011111001: /* stgt.h */ + case 0b00011111010: /* stgt.w */ + case 0b00011111011: /* stgt.d */ + case 0b00011111100: /* stle.b */ + case 0b00011111101: /* stle.h */ + case 0b00011111110: /* stle.w */ + case 0b00011111111: /* stle.d */ + case 0b00011000000 ... 0b00011100011: /* am* insns */ + return true; + } + break; + } + + return false; +} + +#endif