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 7A623EA3F31 for ; Tue, 10 Feb 2026 09:43:01 +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=MGrY3oKk+8ES6Md7sQMNS0SVIzSbCBLR1Zxv1u+Hb38=; b=xjhWXeAWGASleg Ht9VoltbSnQLb3O2cchht0BYYEpZZm8M8LuLvyucxmTi5CnxUykA5CArs0OoAcfEpDTMEL7W3PfMd LjSNWtZ73NtTIBd+eYvTshpdEimx9qc+5MUbplEqrI2BME5/Rrte6eCsPSHKjRLdslvDTTi2g7A72 FKaoH84VOQEH6PvIlkkkzLgPbxHbQ8InC5CDIZmpYjnWFOcw/CU2uRHRpwhCFEiUwfuXlOOGzSh4E sLZ5BLB95nY/fRlfEkiRRuGdGx+oNhlj1+y/Ia71bpLa7QtUvyLMbJlo0w+sFWYrLz9Yye2KI50l6 pdwa58Gdv/ems8CSX+lQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpkGh-0000000GlXM-39EC; Tue, 10 Feb 2026 09:42:51 +0000 Received: from mail-pl1-x635.google.com ([2607:f8b0:4864:20::635]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpkGg-0000000GlWV-0vVA for opensbi@lists.infradead.org; Tue, 10 Feb 2026 09:42:51 +0000 Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-2a8fba3f769so23899225ad.2 for ; Tue, 10 Feb 2026 01:42:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1770716569; x=1771321369; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=n3R9vgO/x9b8W3dSnPHmMCrB3IuD4mg8nPaHgFUwEoQ=; b=mxQnYaRDwnqwloGq7WtMBTXvE77pMskF+LWppP84I4a+Mi5dJ3zd54yim4XVrFEWbS xa/z+sr1IYCnb1Ja7HZ6AMfNFLrOOrrsEazN1dInxuF2Ev/3uWCa995qsaxvj7/pIvZG hSNfeo7wFd/RJTnJEAIVuBA3d4UvwOIOWuBAZxTy4QowkTLiYj/VKa8wP/zskRdNAVTN wBgMep9mno2wi6kkBAZHmBmkdiZBQ9/hCyfFfW5sInQg0q5AqYwPwNMbjgGIj8h+izfe CzG6rsN/Wl5c4fswsktR3uSFq+7DxeHuWdtig2gXIeyswWsf2yP5hTGKLFy+m1PELHG4 /X3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770716569; x=1771321369; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=n3R9vgO/x9b8W3dSnPHmMCrB3IuD4mg8nPaHgFUwEoQ=; b=bXbIYSXinQa7VnClIO7d8ZPFNWDFhfBoECYWPKqo/CGoyisEKKfZSBFBUwSvxsvpAG ym3qOEkx0CMyWDf3AuM+f8JPApyxgGTdNQ0biUhcDAu3LXfSJPi6mAdFG00q2hZsxP8q z4R2UP8QlYoylqRspJEuq8ccJz1wRnNm1YTtlfeopNEyOzIiXBJkfUlm0+VkfcV3HwNL 33axC45YiE98+6r4FpntGLj5sJc9Ow60CcGo67q3F/1PCT4CV5OzvC0misWaWniH+pT6 UgXKfXghYWEx4xGvUTpkScD1Oo/JrleWYw2vUPR7QCtcZBAcYfG+tPI29buZf+XP4kgX wekQ== X-Gm-Message-State: AOJu0YzqSdE53NB9/bM0rFCrKEKwNtDLM42GOG2LRfYV686R6ZtVgVM8 gcC0H7pSQ7ksHnBaMNbZp6srIq7rUaHYxHW/f8EN/bf9Lefc+FkFCcBuQdPuGQ== X-Gm-Gg: AZuq6aI/gNUjlcwhdDFawGlm+svvxp/kXTd9fsq9oRFjd1xiNoqz5dtKi727LhEuWtl YPQiJwwN1xQFf6mfZSlVVz08wOiwvEt3AFekrfXZu64hNLd1BO6oDE5LbCwsTRyPdWOto+uI45d ffhvIFFA5duSeEinl+AhVxhAFquZdMY7e/37QsA0uJUtsRaHSELpzMk2VWyLsNYELGhaznGkB/O 1sf4kl6WiH9ajAoTnUSm6gpdi9onpd/UgtAtIMYT/eQs6/odvL9gI3T8Hez9K2994teNwtgTEKo Ym2qPxS+ImDYmiyv7Kbq6dZSkj/paJPn/yO5h4PBO7OD7KFqvg5lfTkw+gh0mOJOxU5vgAOC7ii wzmxbD1RDvZS9V7mzlbkfcB3wMXQZqekAt6hwc5PRXS9rR81FmymEwgVVAorJThVbE6wbKBfPup 4ogfjFDtTlBZdZhqO+npl7/Qmn X-Received: by 2002:a17:903:124d:b0:29d:9755:9bd8 with SMTP id d9443c01a7336-2ab10344b46mr16257805ad.22.1770716568803; Tue, 10 Feb 2026 01:42:48 -0800 (PST) Received: from m91p.airy.home ([172.92.174.155]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a9521b8d79sm133219215ad.61.2026.02.10.01.42.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Feb 2026 01:42:47 -0800 (PST) From: Bo Gan To: opensbi@lists.infradead.org, dramforever@live.com, anup.patel@oss.qualcomm.com Cc: anup@brainfault.org, cleger@rivosinc.com, samuel.holland@sifive.com Subject: [PATCH 2/7] include: sbi: Add sbi_regs_prev_xlen Date: Tue, 10 Feb 2026 01:40:39 -0800 Message-Id: <20260210094044.72591-3-ganboing@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260210094044.72591-1-ganboing@gmail.com> References: <20260210094044.72591-1-ganboing@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260210_014250_278891_4703DE9B X-CRM114-Status: UNSURE ( 9.76 ) X-CRM114-Notice: Please train this message. X-BeenThere: opensbi@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: "opensbi" Errors-To: opensbi-bounces+opensbi=archiver.kernel.org@lists.infradead.org sbi_regs_prev_xlen reports the xlen of previous mode by decoding from multiple CSRs including mstatus/hstatus/vsstatus Signed-off-by: Bo Gan --- include/sbi/sbi_trap.h | 58 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/include/sbi/sbi_trap.h b/include/sbi/sbi_trap.h index 731a0c98..4ef672f4 100644 --- a/include/sbi/sbi_trap.h +++ b/include/sbi/sbi_trap.h @@ -273,6 +273,64 @@ static inline int sbi_mstatus_prev_mode(unsigned long mstatus) return (mstatus & MSTATUS_MPP) >> MSTATUS_MPP_SHIFT; } +#if __riscv_xlen == 32 +static inline int sbi_regs_prev_xlen(const struct sbi_trap_regs *regs) +{ + return __riscv_xlen; +} +#else +static inline int sbi_mstatus_sxl(unsigned long mstatus) +{ + return (mstatus & MSTATUS_SXL) >> MSTATUS_SXL_SHIFT; +} + +static inline int sbi_mstatus_uxl(unsigned long mstatus) +{ + return (mstatus & MSTATUS_UXL) >> MSTATUS_UXL_SHIFT; +} + +static inline int sbi_hstatus_vsxl(unsigned long hstatus) +{ + return (hstatus & HSTATUS_VSXL) >> HSTATUS_VSXL_SHIFT; +} + +static inline int sbi_regs_prev_xlen(const struct sbi_trap_regs *regs) +{ + unsigned long hstatus, vsstatus; + + if (!sbi_regs_from_virt(regs)) { + switch (sbi_mstatus_prev_mode(regs->mstatus)) { + case PRV_M: + return __riscv_xlen; + case PRV_S: + return MXL_TO_XLEN(sbi_mstatus_sxl(regs->mstatus)); + case PRV_U: + return MXL_TO_XLEN(sbi_mstatus_uxl(regs->mstatus)); + default: + __builtin_unreachable(); + } + } + + /* V=1, Check HSXLEN first */ + if (sbi_mstatus_sxl(regs->mstatus) < MXL_XLEN_64) + return 32; + + hstatus = csr_read(CSR_HSTATUS); + /* Check VSXLEN */ + if (sbi_hstatus_vsxl(hstatus) < MXL_XLEN_64) + return 32; + + vsstatus = csr_read(CSR_VSSTATUS); + switch (sbi_mstatus_prev_mode(regs->mstatus)) { + case PRV_S: + return MXL_TO_XLEN(sbi_hstatus_vsxl(hstatus)); + case PRV_U: + return MXL_TO_XLEN(sbi_mstatus_uxl(vsstatus)); + } + __builtin_unreachable(); +} +#endif + int sbi_trap_redirect(struct sbi_trap_regs *regs, const struct sbi_trap_info *trap); -- 2.34.1 -- opensbi mailing list opensbi@lists.infradead.org http://lists.infradead.org/mailman/listinfo/opensbi