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GET /api/1.1/patches/2224804/?format=api
{ "id": 2224804, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2224804/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260418061429.16898-1-rickgcn@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260418061429.16898-1-rickgcn@gmail.com>", "date": "2026-04-18T06:14:29", "name": "hw: i386: vapic: restore IRQ polling for non-kernel irqchip backends", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "6969cd41505d3332f07677745658ee9ecc0ee504", "submitter": { "id": 93188, "url": "http://patchwork.ozlabs.org/api/1.1/people/93188/?format=api", "name": "rickgcn", "email": "rickgcn@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260418061429.16898-1-rickgcn@gmail.com/mbox/", "series": [ { "id": 500465, "url": "http://patchwork.ozlabs.org/api/1.1/series/500465/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500465", "date": "2026-04-18T06:14:29", "name": "hw: i386: vapic: restore IRQ polling for non-kernel irqchip backends", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500465/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224804/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224804/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=k+h30YKB;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-pl1-x630.google.com", "X-Spam_score_int": "0", "X-Spam_score": "-0.1", "X-Spam_bar": "/", "X-Spam_report": "(-0.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n HK_RANDOM_ENVFROM=0.998, HK_RANDOM_FROM=0.998, RCVD_IN_DNSWL_NONE=-0.0001,\n SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no", "X-Spam_action": "no action", "X-Mailman-Approved-At": "Sat, 18 Apr 2026 16:23:22 -0400", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "69dfc078 extended vAPIC handling for WHPX with user-mode irqchip, but it\nalso changed vapic_write() case 4 in a way that excludes TCG from\napic_poll_irq().\n\nBefore that change, IRQ polling happened whenever no in-kernel irqchip\nwas active. After the change, it only happened for KVM or WHPX with a\nuser-mode irqchip. Under TCG, both kvm_enabled() and whpx_enabled() are\nfalse, so the poll never happens.\n\nThis regresses 32-bit Windows XP guests on a Windows host with\n-machine pc-i440fx-10.0,accel=tcg, causing a STOP 0x0000000A during boot.\n\nFix it by making the decision depend on whether KVM or WHPX is using an\nin-kernel irqchip, instead of whether either accelerator is enabled.\n\nFixes: 69dfc078a6f0 (\"hw: i386: vapic: enable on WHPX with user-mode irqchip\")\n\nSigned-off-by: rickgcn <rickgcn@gmail.com>\n---\n hw/i386/vapic.c | 3 +--\n 1 file changed, 1 insertion(+), 2 deletions(-)", "diff": "diff --git a/hw/i386/vapic.c b/hw/i386/vapic.c\nindex 41e5ca26df..1acb9f91b2 100644\n--- a/hw/i386/vapic.c\n+++ b/hw/i386/vapic.c\n@@ -716,8 +716,7 @@ static void vapic_write(void *opaque, hwaddr addr, uint64_t data,\n break;\n default:\n case 4:\n- if ((kvm_enabled() && !kvm_irqchip_in_kernel())\n- || (whpx_enabled() && !whpx_irqchip_in_kernel())) {\n+ if (!kvm_irqchip_in_kernel() && !whpx_irqchip_in_kernel()) {\n apic_poll_irq(cpu->apic_state);\n }\n break;\n", "prefixes": [] }