From patchwork Fri Mar 3 10:24:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksii Kurochko X-Patchwork-Id: 13158629 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 8B328C678D4 for ; Fri, 3 Mar 2023 10:24:40 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.505763.778711 (Exim 4.92) (envelope-from ) id 1pY2aZ-0000h5-3b; Fri, 03 Mar 2023 10:24:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 505763.778711; Fri, 03 Mar 2023 10:24:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2aZ-0000gl-02; Fri, 03 Mar 2023 10:24:35 +0000 Received: by outflank-mailman (input) for mailman id 505763; Fri, 03 Mar 2023 10:24:34 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2aY-0000IE-4A for xen-devel@lists.xenproject.org; Fri, 03 Mar 2023 10:24:34 +0000 Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [2a00:1450:4864:20::22e]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 969a1106-b9ad-11ed-a550-8520e6686977; Fri, 03 Mar 2023 11:24:32 +0100 (CET) Received: by mail-lj1-x22e.google.com with SMTP id h9so1835599ljq.2 for ; Fri, 03 Mar 2023 02:24:32 -0800 (PST) Received: from fedora.. (46.204.108.203.nat.umts.dynamic.t-mobile.pl. [46.204.108.203]) by smtp.gmail.com with ESMTPSA id j22-20020a2e3c16000000b00295a36fedadsm239600lja.26.2023.03.03.02.24.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Mar 2023 02:24:31 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 969a1106-b9ad-11ed-a550-8520e6686977 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1677839072; 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=UQMX7LcJmPbPR7mQNYR7UFrgssX/7qk0j9FHn0813I0=; b=EGZSPfb1qxBJ8gSajlUU26oC52NZvWutZSTIuKkylFl5aDMVqaxG2V7xo8amflWTNh grUC6q9Qd9QzTLGPewN4l8tWRkGnjgi3gi7Al44XLxrIcBHpeQ6hAyuGYI9DXG+awqSn Ea0lyaH18gC+PHbLqEY6IywAnE5pqetDU5sWbRdlxFYh5ke4HUsbDA8aweBzbwLIGVLB Ix3iyNGyu6lGxL8yJC0w/gig7vwVByLonKuFUyZ1pZFiRnWCSEwO+eN3lWxHoIBIlccW Hsp6RTnJBJXugZZsonrX0cpF9Ki5zsnzqbUzud34r9qvSzMYjpbA6AID0GDm0fjB1wVf V2wA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677839072; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UQMX7LcJmPbPR7mQNYR7UFrgssX/7qk0j9FHn0813I0=; b=LkG4y2ds3xsDiXnxlJaqlFlFHMKflnS3xSquVKu68BOBlt4Uwxi+4O5ybKxhfJHiOA sNSUUnhH4zdSkzz9RNLLRrqWmqTVao0W5YHVSGZnfXn5JJAUYDpddR2ymQl0ZiT/s9wB 3vc6bh9uaHM3XeosssU4hsCJIfooO2rNs754vYi5q672kLrijNQMKPNWWpqUziSW92hQ B3u6I2sFOEnnghCmLw9WOnC9L3ZhqDaRIGpLOp8ja36Z6P+Hct9FSOzIiX9Ddn8LzKD7 d5yJCvSA/pX9QyX3VK194X1rheF6Ijc4WLNI2vdWeuGWJO8QIEp1JIDIrCJPiS2/sfVc ZzzQ== X-Gm-Message-State: AO0yUKW4C4UOUqOkSfDi8lgFIOtf9KkOmNCD1b+T+5eWzGXSKziBZ5R+ NBBTv8tvIjGB3Bn9ubXIvkGN1MbSV5E= X-Google-Smtp-Source: AK7set+q2kWlmMtFb/0gUj+GDQ7jyqmb93rbVx/KMuCSDOgzUyYIe7riMnOTcJ6H9ZQtPDODt9rKMg== X-Received: by 2002:a05:651c:221f:b0:293:4e43:c276 with SMTP id y31-20020a05651c221f00b002934e43c276mr541225ljq.22.1677839072032; Fri, 03 Mar 2023 02:24:32 -0800 (PST) From: Oleksii Kurochko To: xen-devel@lists.xenproject.org Cc: Jan Beulich , Andrew Cooper , Stefano Stabellini , Gianluca Guida , Oleksii Kurochko , Bob Eshleman , Alistair Francis , Connor Davis Subject: [PATCH v3 3/3] xen/riscv: initialize .bss section Date: Fri, 3 Mar 2023 12:24:24 +0200 Message-Id: <16fb328e06f6b99d967fa7d186a4c0aaa986050e.1677838213.git.oleksii.kurochko@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: MIME-Version: 1.0 Signed-off-by: Oleksii Kurochko Reviewed-by: Andrew Cooper Reviewed-by: Bobby Eshleman --- xen/arch/riscv/riscv64/head.S | 9 +++++++++ xen/arch/riscv/setup.c | 8 ++++++++ 2 files changed, 17 insertions(+) diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S index adf5d6c74a..8887f0cbd4 100644 --- a/xen/arch/riscv/riscv64/head.S +++ b/xen/arch/riscv/riscv64/head.S @@ -1,3 +1,4 @@ +#include #include .section .text.header, "ax", %progbits @@ -18,6 +19,14 @@ ENTRY(start) li t0, SSTATUS_FS csrc CSR_SSTATUS, t0 + /* Clear the BSS */ + la t3, __bss_start + la t4, __bss_end +.L_clear_bss: + REG_S zero, (t3) + add t3, t3, __SIZEOF_POINTER__ + bltu t3, t4, .L_clear_bss + la sp, cpu0_boot_stack li t0, STACK_SIZE add sp, sp, t0 diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c index d9723fe1c0..929565720b 100644 --- a/xen/arch/riscv/setup.c +++ b/xen/arch/riscv/setup.c @@ -7,6 +7,14 @@ unsigned char __initdata cpu0_boot_stack[STACK_SIZE] __aligned(STACK_SIZE); +/* + * To be sure that .bss isn't zero. It will simplify code of + * .bss initialization. + * TODO: + * To be deleted when the first real .bss user appears + */ +int dummy_bss __attribute__((unused)); + void __init noreturn start_xen(unsigned long bootcpu_id, unsigned long dtb_base) {