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[109.243.69.225]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ad1891a3cb9sm740295366b.60.2025.05.06.09.51.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 May 2025 09:51:55 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version 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: 6c1f9490-2a9a-11f0-9ffb-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1746550317; x=1747155117; darn=lists.xenproject.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=UZZenJUioRQGH1T51btvwJarRZwAntnsDHS9Af8zNvk=; b=QoN7NUss06UJf7jtNa+HLw9MFZ0uOdEh52HSsSzfF7cVZVlqJGz5srDUOG3lX+cT2Y SHIxBgKZHL18zH5B+JUR7lRyNZkqswo1nxLim3WEyQu34rkDSVCjcf3TWffcgmLpSLs1 +S9VeUIp47b1OF2bDLIk8LKKQpjUZsEw/47rd2Y9zlNSKuj3DGMJGD0Ul4K9HdDlgCKW VIZl2JoYzSfoz9SPrcxiF5r2+naEjEyLyG4jA32P7Zhq1OOn9BY4OImWMSHgLZTHM0x7 i2vXV+OpQk/RwlBZrr5Fw4fdhgYsAHepk348Rw8EqWf8nXBWCiX2hBQZOQmob8/Ayh4G W9Cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746550317; x=1747155117; 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=UZZenJUioRQGH1T51btvwJarRZwAntnsDHS9Af8zNvk=; b=Fj0g8m2jcRAfqBGQ+99a3XjkSNGl5kS1LNd57g3tBKXOeQEs07vSQntJFJdDTdV7yb zVI2DnCyz6GzFsTl7MTbd5xTz2w2n8O5ed8x06WG0Nkdq0KOxaCwu+xDy/oDNnDVfDa9 jXlOCfCjUN0hIEgtw+seil5h4tPfumxwlepyye9sj3fhGJH6EFydEm+azXFZ+0VBYKr6 /93Pq6qWdH/ncMYQ9thCqbNl1SigMBSWtzDgWBvNuAnFkG2IEp0t3uFywzfTw2Vqq8Oo J1/HdYbMnPrE6pkFtkvhp6ZifC0B67rAQvakC1ChKD1aiR6SYGCTfQ2W7BWeY1/EGSvz 9YOg== X-Gm-Message-State: AOJu0Yy6X5sXuekzjAQ8nSiU7Z116s+VZD6rursmFfDyfCiLyY3fYZg6 vcrdM+/yTwdcI+WvYq0Xx75KwsJOKTBiYrDDP3XMPQs0togHlLQQo5VE2A== X-Gm-Gg: ASbGnct5C0y6j1+jNg7w6pw02tUrdAW0G1l/uEIM7YAcStXq/3sqrBR1FgXUAKYVMXs C2easMw6FvISpJQRqv2nxkaXWjEMtMoOwVDA0uBrRwMa2gEGVN38UNDS+UZkB/4T9Z45xiy2WZ6 sWh9vN8BNOSkeGZVMIv96cleY8NeO6GiNg+CvA7KtPg24zOHW9I41c1iw6EdHFgItNeOeAvECRJ iibcWkZzqgLFYTJv7QPrvHWFULKq2xrF8IOhLz0G/PxwsutmickG8JODP9hgmWW6UkBpgYXBg5H JsWd0QXKl12a9Saf+YgGDUfxp+ikmFfQ3CYFYmClGwE9/tVCEormIsaPTKD06TBmwltDyU5xpy8 O7PX8gJD3GBDw91kR29bv X-Google-Smtp-Source: AGHT+IFaSJSNfOEaKtEIxlpAAZoDwVMB3HMLE+EanhY+am3QF4vq/jtENtfjZtIqTKyA8XLs2tXZLQ== X-Received: by 2002:a17:907:3e23:b0:ace:bead:5ee1 with SMTP id a640c23a62f3a-ad1e8dbc871mr15117066b.42.1746550316402; Tue, 06 May 2025 09:51:56 -0700 (PDT) From: Oleksii Kurochko To: xen-devel@lists.xenproject.org Cc: Oleksii Kurochko , Alistair Francis , Bob Eshleman , Connor Davis , Andrew Cooper , Anthony PERARD , Michal Orzel , Jan Beulich , Julien Grall , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Stefano Stabellini Subject: [PATCH v2 01/16] xen/riscv: initialize bitmap to zero in riscv_fill_hwcap_from_isa_string() Date: Tue, 6 May 2025 18:51:31 +0200 Message-ID: <21efdebac3d1c9797420a8c81fbbd6a06ecc9121.1746530883.git.oleksii.kurochko@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1746550335231116600 Content-Type: text/plain; charset="utf-8" The this_isa bitmap should be explicitly initialized to zero to avoid false positives when detecting supported ISA extensions. Without proper zero-initialization, the bitmap may retain non-zero values from uninitialized memory, causing Xen to incorrectly assume that certain extensions are supported. This change ensures reliable detection of ISA capabilities. Fixes: 0c2f717eae ("xen/riscv: identify specific ISA supported by cpu") Signed-off-by: Oleksii Kurochko Reviewed-by: Jan Beulich --- Changes in V2: - new patch. --- xen/arch/riscv/cpufeature.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/arch/riscv/cpufeature.c b/xen/arch/riscv/cpufeature.c index 5aafab0f49..3246a03624 100644 --- a/xen/arch/riscv/cpufeature.c +++ b/xen/arch/riscv/cpufeature.c @@ -405,6 +405,8 @@ static void __init riscv_fill_hwcap_from_isa_string(voi= d) const char *isa; unsigned long cpuid; =20 + bitmap_zero(this_isa, RISCV_ISA_EXT_MAX); + if ( !dt_device_type_is_equal(cpu, "cpu") ) continue; =20 --=20 2.49.0