From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 44B0E24F594 for ; Wed, 5 Mar 2025 15:26:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741188397; cv=none; b=Ie2I3bnjZPPLKQ+DE4l6tAESOtauhe96LogUHJ+0G+bY+VF0z26JROcL6XmEWz+akG3d7ZiAtyeZAFOwSbUrSd84JArY8/rl42u07rHZGYAKmqXCnpLPuQNWZLKHtsb8WsHYe2tik2Gf1tZeJdiG91Bu3moKcPYvQPa9joeWoJs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741188397; c=relaxed/simple; bh=ZFMnP29tRojoZAYRWn2YoJlKwVnOhe/hYMgtVR64B/g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ukqy8u6rz+m7JPjY03/KXkTNx2blb7nXChzyYVvaEwlnVCCYxUg3+GFF8RZ11LsdPHVktznaLpwrbquAgA6Arnp38otVV3aKAULDIz1UZyEMzHnKmjmjkmwBKQRQent9xYPu8QQgaj0mQUY4ACOunXeRyP4K8qxlvi9t2gwu07k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=iTuv3S0V; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iTuv3S0V" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741188395; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=EWytTCujcELs5/4BiTEaWtlYBtC+JW3njDIGrLsFaXA=; b=iTuv3S0V0Fvlqh/I2OIfIKXEZFFb63GUTiJdBAktgRzPTHJrOb6Blc50Vpcoz6bVP1qI+n 47CPxJE2LF6xRJEGjYn1MQhwbw0l/2ZwhQ6y/4A9EePTiUAhNTDG9+ikKC3W7lvq3iP95Y 5Yf74EqilP96qwpXys2nIXUFYPb2IyI= Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-617-V-F49tz-PGyTL-Bai6Wwmg-1; Wed, 05 Mar 2025 10:26:33 -0500 X-MC-Unique: V-F49tz-PGyTL-Bai6Wwmg-1 X-Mimecast-MFC-AGG-ID: V-F49tz-PGyTL-Bai6Wwmg_1741188393 Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-22366901375so21239215ad.0 for ; Wed, 05 Mar 2025 07:26:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741188392; x=1741793192; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=EWytTCujcELs5/4BiTEaWtlYBtC+JW3njDIGrLsFaXA=; b=eheeWpiDNjeEMcdembIy2GNSZ1C9vHqdgL9QJ0QGdNr9C7HYGu8XwfkETSeu+md9xt iF8Vx/emG1ELOMdhc+KlFNWEMf6VMzIZbA0oSug6JDFvVvS7WW8BDVcNuoxD+ccoIXjs YZLTuBI56r6k+i3xwRIccj4hzxwleQfaJIVjuCWilMNOXUdzbZc+9ZXCnbZUx5nUNPop wXsV2nrJ4eZTKc9hIRh1FCSN+OekH/7Bglwz9stKLSo7aK/jf+UNVtYz3GyEJMyaSQxD LOlcNVe1vVVt263WZvzXS/u/N6QilKiOcakONjXVeheV0qOkR4hX6xEOlKUuM1fBlDgU Jqlw== X-Forwarded-Encrypted: i=1; AJvYcCXRocMAb6GJEx4bIUEAAbzZfr9/cBMZWIe3LIeOtbd2FzjGS0FSA+ygFJxQgleDJp/FcOIiGr6MvkLqBFU=@vger.kernel.org X-Gm-Message-State: AOJu0Ywm3i731Z4eVSVzUaR0L3zBh77OUZBYkD7dqFqPS990wcp3/HdR CSkZMEw5FYOfkjRYTgYoEQi4j8K9O8buc1Uxb6fOvMGZFis0MBP/hY5lqySltufPsMnDAcb89IE iSKJRAZuL9oaE5nXA9Ow5BTZLR9nV5j4YRHs761169xgvItA74ttgqixpLCMFrg== X-Gm-Gg: ASbGnctFGX1ucQYXD4Inmyz5yUTWN9F+DyZf+a5HyZr1GT7UAOt3O6ganRFt5akxKcb 8rTIS7quwTX5M8vRRIKin0SGfbRag5xo5PHDUyoxfogwQvKUf9hxhJD5FgoozHxV9swqrO0KOA0 vIqSaecrdObaiBR4Wh4ZSxYK7oC9fhfkQJA4RCSjU23bmx5FU137D5YCGxgcJ1gkS4GX+F8JyB7 GioFSVmpW9txz5iBm/SzjLEBdm1uhHx0n5x0ymAkGcnsvHgHU5wpD0BQXoekp6V+TnT+8q88o05 e1cGIMNxpnOYE7ld X-Received: by 2002:a05:6a00:9a0:b0:736:38b1:51c3 with SMTP id d2e1a72fcca58-7366e75b316mr13315925b3a.10.1741188392501; Wed, 05 Mar 2025 07:26:32 -0800 (PST) X-Google-Smtp-Source: AGHT+IE1AgdJworx0wc6ga7cTSTBOuDEcumamKctgiwANw8/Rb3cfxQmtMLlo6lyVJUiuFftqJ0LQA== X-Received: by 2002:a05:6a00:9a0:b0:736:38b1:51c3 with SMTP id d2e1a72fcca58-7366e75b316mr13315865b3a.10.1741188392100; Wed, 05 Mar 2025 07:26:32 -0800 (PST) Received: from zeus.elecom ([240b:10:83a2:bd00:6e35:f2f5:2e21:ae3a]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7364b4eff66sm6983292b3a.83.2025.03.05.07.26.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Mar 2025 07:26:31 -0800 (PST) From: Ryosuke Yasuoka To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, kraxel@redhat.com, gurchetansingh@chromium.org, olvaffe@gmail.com, akpm@linux-foundation.org, urezki@gmail.com, hch@infradead.org, dmitry.osipenko@collabora.com, jfalempe@redhat.com Cc: Ryosuke Yasuoka , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH drm-next 0/2] Enhance drm_panic Support for Virtio-GPU Date: Thu, 6 Mar 2025 00:25:52 +0900 Message-ID: <20250305152555.318159-1-ryasuoka@redhat.com> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi This patch series proposes enhancement for drm_panic. While virtio-gpu currently supports drm_panic [1], it is limited to vmapped shmem BOs. IOW, it does not work in non-VT FB environments, such as GUI desktops. This limitation arises because shmem BOs require vmap, which cannot be used in a panic handler since vmap is sleepable and takes locks. To address this, drm_panic needs an atomic variant of vmap. The first patch (1/2) introduces atomic_vmap, and the second patch (2/2) updates the existing virtio drm_panic implementation to use the atomic_vmap. I've tested these changes in both Gnome and VT environments, and they work correctly. Best regards, Ryosuke [1] https://patchwork.freedesktop.org/patch/635658/ Ryosuke Yasuoka (2): vmalloc: Add atomic_vmap drm/virtio: Use atomic_vmap to work drm_panic in GUI drivers/gpu/drm/drm_gem.c | 51 ++++++++++++ drivers/gpu/drm/drm_gem_shmem_helper.c | 51 ++++++++++++ drivers/gpu/drm/virtio/virtgpu_plane.c | 14 +++- include/drm/drm_gem.h | 1 + include/drm/drm_gem_shmem_helper.h | 2 + include/linux/vmalloc.h | 2 + mm/internal.h | 5 ++ mm/vmalloc.c | 105 +++++++++++++++++++++++++ 8 files changed, 228 insertions(+), 3 deletions(-) base-commit: e21cba704714c301d04c5fd37a693734b623872a -- 2.48.1