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GET /api/1.1/patches/2232020/?format=api
{ "id": 2232020, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2232020/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/patch/20260502081446.10472-1-chihsheng@google.com/", "project": { "id": 59, "url": "http://patchwork.ozlabs.org/api/1.1/projects/59/?format=api", "name": "Linux Test Project development", "link_name": "ltp", "list_id": "ltp.lists.linux.it", "list_email": "ltp@lists.linux.it", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260502081446.10472-1-chihsheng@google.com>", "date": "2026-05-02T08:14:46", "name": "tst_virt: Add fallback KVM detection via virtio block devices", "commit_ref": null, "pull_url": null, "state": "needs-review-ack", "archived": false, "hash": "481a68a5fc7e2def864db437fa25136e12bc91c3", "submitter": { "id": 93256, "url": "http://patchwork.ozlabs.org/api/1.1/people/93256/?format=api", "name": "Darren Chang", "email": "chihsheng@google.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ltp/patch/20260502081446.10472-1-chihsheng@google.com/mbox/", "series": [ { "id": 502517, "url": "http://patchwork.ozlabs.org/api/1.1/series/502517/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/list/?series=502517", "date": "2026-05-02T08:14:46", "name": "tst_virt: Add fallback KVM detection via virtio block devices", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502517/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2232020/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/2232020/checks/", "tags": {}, "headers": { "Return-Path": "<ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "ltp@lists.linux.it" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "ltp@picard.linux.it" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=lists.linux.it header.i=@lists.linux.it\n header.a=rsa-sha256 header.s=picard header.b=ZA83ArXJ;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256\n header.s=20251104 header.b=WF3GXO9R;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=213.254.12.146; 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charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it", "Sender": "\"ltp\" <ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>" }, "content": "Currently, is_kvm() relies on reading /proc/cpuinfo to find the\n\"QEMU Virtual CPU\" string.\n\nThis patch introduces a fallback mechanism to detect KVM environments\nby checking for the existence of standard virtio block devices when the\nCPU info check fails. Specifically, it probes for:\n- /sys/block/vda (Reliable sysfs kernel interface)\n- /dev/vda (Standard Linux device node)\n- /dev/block/vda (Android's ueventd device node)\n\nIncluding \"/dev/block/vda\" ensures that the detection works seamlessly\nwithin Android emulator environments (such as Cuttlefish),\nwhich use ueventd and place block devices under /dev/block/ instead of\nthe standard Linux /dev/.\n\nSigned-off-by: Darren Chang <chihsheng@google.com>\n---\n lib/tst_virt.c | 13 +++++++++++++\n 1 file changed, 13 insertions(+)", "diff": "diff --git a/lib/tst_virt.c b/lib/tst_virt.c\nindex 109d7a853..ac0aef665 100644\n--- a/lib/tst_virt.c\n+++ b/lib/tst_virt.c\n@@ -44,6 +44,19 @@ static int is_kvm(void)\n \t}\n \n \tSAFE_FCLOSE(NULL, cpuinfo);\n+\n+\t/* * Fallback check for KVM:\n+\t * Android's ueventd creates block devices in /dev/block/\n+\t * instead of the standard Linux /dev/, so we check both.\n+\t */\n+\tif (!found) {\n+\t\tif (access(\"/dev/vda\", F_OK) == 0 ||\n+\t\t\taccess(\"/sys/block/vda\", F_OK) == 0 ||\n+\t\t\taccess(\"/dev/block/vda\", F_OK) == 0) {\n+\t\t\tfound = 1;\n+\t\t}\n+\t}\n+\n \treturn found;\n }\n \n", "prefixes": [] }