From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D24022F3A7E; Mon, 5 May 2025 23:14:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746486886; cv=none; b=sQdikaOPi2CwZX8Qn6shcynRdSzogsqUDQWm7vm+IwE7gCMOYRPcdrfCLpFq4olTsxYOXx/nunhjE7Zu+6kZ09HCdDshH09wFTdhWOrAFImfi3e5zN3fpDaRVZofYcFNHfF6oW4wclzHff6eiIAh0TToAqkAZEmhDoCH9pOylAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746486886; c=relaxed/simple; bh=AaVyXzjXMB89c+N3cLGs6RLB1uFIyFBHLakI9cGBQ9U=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qU1WJKRBe6Y5oCrZvPxEOvi/qxAw1Ilivcc7bFk2ybrqxz+WPChILvRwGxPnttx/Xdsx/rRF4kPOrWXiuVbeX6LbAxje7Vz4iGHd/OGxndwWuteb8OOy5Bi5d+F5Z68kAEKfHGlcqN8uwIgAg5kMIBmVIVsOMihqtg1nFNm+QKA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HVPTCFIQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HVPTCFIQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81328C4CEF1; Mon, 5 May 2025 23:14:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746486885; bh=AaVyXzjXMB89c+N3cLGs6RLB1uFIyFBHLakI9cGBQ9U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HVPTCFIQrJ2KaeujaUMNIqDB06WwR297YjQeAukSKLIIB0XXHltgVekrrbIuYIkaS Iw7F/hzIPdal+bOqI8rZPFjj1UYtPlXldDRD+YXSkDjzp6JFkKh7yz8XL7unJk8aHg pRJ/IZlwmsw0YjoUGreLdacF5mhZmOp+DibkeU+CR8gwIMruZUliEyuXBUQElcHp6/ ndFkvVjUl9Jx67ZsFdXbK5gCebj/pcDDeekzp+9MNtd9BhHiPguw0nG2bJYdynNhAg m7eCONGMSz8nWVe7wmEk/jTmECVtcbjcjhUrft50KCU6wmPul7cPKQT8tXVqkhuh8Q rgIhGy8TAT9tg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Frediano Ziglio , Juergen Gross , Sasha Levin , sstabellini@kernel.org, xen-devel@lists.xenproject.org Subject: [PATCH AUTOSEL 5.15 043/153] xen: Add support for XenServer 6.1 platform device Date: Mon, 5 May 2025 19:11:30 -0400 Message-Id: <20250505231320.2695319-43-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505231320.2695319-1-sashal@kernel.org> References: <20250505231320.2695319-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.181 Content-Transfer-Encoding: 8bit From: Frediano Ziglio [ Upstream commit 2356f15caefc0cc63d9cc5122641754f76ef9b25 ] On XenServer on Windows machine a platform device with ID 2 instead of 1 is used. This device is mainly identical to device 1 but due to some Windows update behaviour it was decided to use a device with a different ID. This causes compatibility issues with Linux which expects, if Xen is detected, to find a Xen platform device (5853:0001) otherwise code will crash due to some missing initialization (specifically grant tables). Specifically from dmesg RIP: 0010:gnttab_expand+0x29/0x210 Code: 90 0f 1f 44 00 00 55 31 d2 48 89 e5 41 57 41 56 41 55 41 89 fd 41 54 53 48 83 ec 10 48 8b 05 7e 9a 49 02 44 8b 35 a7 9a 49 02 <8b> 48 04 8d 44 39 ff f7 f1 45 8d 24 06 89 c3 e8 43 fe ff ff 44 39 RSP: 0000:ffffba34c01fbc88 EFLAGS: 00010086 ... The device 2 is presented by Xapi adding device specification to Qemu command line. Signed-off-by: Frediano Ziglio Acked-by: Juergen Gross Message-ID: <20250227145016.25350-1-frediano.ziglio@cloud.com> Signed-off-by: Juergen Gross Signed-off-by: Sasha Levin --- drivers/xen/platform-pci.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c index 6ebd819338ecb..2c77cac5594ba 100644 --- a/drivers/xen/platform-pci.c +++ b/drivers/xen/platform-pci.c @@ -26,6 +26,8 @@ #define DRV_NAME "xen-platform-pci" +#define PCI_DEVICE_ID_XEN_PLATFORM_XS61 0x0002 + static unsigned long platform_mmio; static unsigned long platform_mmio_alloc; static unsigned long platform_mmiolen; @@ -174,6 +176,8 @@ static int platform_pci_probe(struct pci_dev *pdev, static const struct pci_device_id platform_pci_tbl[] = { {PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM_XS61, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0,} }; -- 2.39.5