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GET /api/patches/2219741/?format=api
{ "id": 2219741, "url": "http://patchwork.ozlabs.org/api/patches/2219741/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260404042015.86580-12-mohamed@unpredictable.fr/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260404042015.86580-12-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-04-04T04:20:15", "name": "[v6,11/11] whpx: i386: IO port fast path cleanup", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "31475a5ad9d98230a9d0aa6d0b833df4a17e1e62", "submitter": { "id": 91318, "url": "http://patchwork.ozlabs.org/api/people/91318/?format=api", "name": "Mohamed Mediouni", "email": "mohamed@unpredictable.fr" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260404042015.86580-12-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 498696, "url": "http://patchwork.ozlabs.org/api/series/498696/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498696", "date": "2026-04-04T04:20:05", "name": "whpx: i386: bug fixes, feature probing and CPUID", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/498696/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219741/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219741/checks/", "tags": {}, "related": [], "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=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=U/tfDV2e;\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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Sat, 04 Apr 2026 00:20:38 -0400", "from outbound.st.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-east-1a-10-percent-0 (Postfix) with ESMTPS id\n 13A2F1800148; Sat, 04 Apr 2026 04:20:34 +0000 (UTC)", "from localhost.localdomain (unknown [17.42.251.67])\n by p00-icloudmta-asmtp-us-east-1a-10-percent-0 (Postfix) with ESMTPSA id\n 51D4F1800144; Sat, 04 Apr 2026 04:20:33 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1775276436; x=1777868436;\n bh=XF3c7fudpu0e0TEiY2lChefEkznSH2lR6kP+JtXWkz4=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=U/tfDV2eVg4QZOVhxwvPEOKT4EsbDAxLDg5pg91SNf+1G9knwo057DuRM7alN3mfQXNqztJJJn6zpOqWRJHFZ/sDlchNDDqyU1Q0Y41GVI2ucyS/9SPOk2mSLsDA9a4L9mVkmj7nDn1k/jtU5xDfiGA9ZM5gAy/AYqGONcwpyJlVM9o83/spHJbqWF0tZHjbbq5Btquw1l9I684KNv/8naKsoT3XAZn51yDuUqPf99rszGuIr1Duefm37dEjvYO7qoDB0fcvz7qKsABl5lBPnvVvJO7DsgXLNQVu9uAU70PtcaOBJW6MVrbGnmfM3L7w3JAIO77sGmPOvf0xF8QpNA==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Wei Liu <wei.liu@kernel.org>, Roman Bolshakov <rbolshakov@ddn.com>,\n Pedro Barbuda <pbarbuda@microsoft.com>,\n Mohamed Mediouni <mohamed@unpredictable.fr>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Paolo Bonzini <pbonzini@redhat.com>, Zhao Liu <zhao1.liu@intel.com>", "Subject": "[PATCH v6 11/11] whpx: i386: IO port fast path cleanup", "Date": "Sat, 4 Apr 2026 06:20:15 +0200", "Message-ID": "<20260404042015.86580-12-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260404042015.86580-1-mohamed@unpredictable.fr>", "References": "<20260404042015.86580-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-ORIG-GUID": "CC1raVW39lRktLU8yaf4N8kamy5I5ksM", "X-Authority-Info-Out": "v=2.4 cv=J+2nLQnS c=1 sm=1 tr=0 ts=69d09193\n cx=c_apl:c_pps:t_out a=YrL12D//S6tul8v/L+6tKg==:117\n a=YrL12D//S6tul8v/L+6tKg==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=Vrzv6M8N8vcM0KmfSJEA:9", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA0MDAzNCBTYWx0ZWRfX6RIPgARou4Ox\n DPAETOpkCiSEjcMymtQPQO/UvPMUIe7syU4ZumCLYwrRonJPZPDTU0ZD7SrHk+6ip4r+XlHozcR\n yS54h7x7NDgPDTr3MIlsgbcGzABSi3TOfOfa/G+XmAWi2wAYjuoaAsKe/VUXySao4FM0yj1NJxW\n uTX3ZyTKW5lkKAo/b1BjDzRWBmS5e5j1F0KdUW8dBRFPt32lK+tb3i0Z8AE5zTuk9a2FFtAYw42\n xKnYUAbqMVwRvWAXrfqP5uGUz+3NXmAlSjKL0t5UFrFr2991mi2e1/GV16Y87LhDmd1S5YVht0S\n FVOakwXxCBYCGmyG9a/2araGw8UKt6A6jyOneJKPpLzR40eGpIL7moHYpNKr3M=", "X-Proofpoint-GUID": "CC1raVW39lRktLU8yaf4N8kamy5I5ksM", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-03_07,2026-04-03_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0\n lowpriorityscore=0 spamscore=0 adultscore=0 bulkscore=0 malwarescore=0\n mlxscore=0 suspectscore=0 clxscore=1030 mlxlogscore=805 phishscore=0\n classifier=spam authscore=0 adjust=0 reason=mlx scancount=1\n engine=8.22.0-2601150000 definitions=main-2604040034", "Received-SPF": "pass client-ip=57.103.79.4;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.st.icloud.com", "X-Spam_score_int": "-27", "X-Spam_score": "-2.8", "X-Spam_bar": "--", "X-Spam_report": "(-2.8 / 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,\n RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "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": "vmport calls synchronise_state within an I/O port read.\nSupport that properly.\n\nWhat was there before worked because of a side effect of\nwhpx_get_reg synchronising context if cpu->vcpu_dirty.\n\nRemove that whpx_get_reg call in whpx_bump_rip too as it's no longer\nneeded now.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/whpx/whpx-all.c | 17 +++++++++++++----\n 1 file changed, 13 insertions(+), 4 deletions(-)", "diff": "diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex 4810b6387d..ac2671745f 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -861,7 +861,6 @@ static void handle_io(CPUState *env, uint16_t port, void *buffer,\n static void whpx_bump_rip(CPUState *cpu, WHV_RUN_VP_EXIT_CONTEXT *exit_ctx)\n {\n WHV_REGISTER_VALUE reg;\n- whpx_get_reg(cpu, WHvX64RegisterRip, ®);\n reg.Reg64 = exit_ctx->VpContext.Rip + exit_ctx->VpContext.InstructionLength;\n whpx_set_reg(cpu, WHvX64RegisterRip, reg);\n }\n@@ -889,13 +888,23 @@ static int whpx_handle_portio(CPUState *cpu,\n } else {\n reg.Reg64 = (uint64_t)val;\n }\n- whpx_bump_rip(cpu, exit_ctx);\n- whpx_set_reg(cpu, WHvX64RegisterRax, reg);\n+ /* vmport calls cpu_synchronize_state on an I/O port read */\n+ if (!cpu->vcpu_dirty) {\n+ whpx_bump_rip(cpu, exit_ctx);\n+ whpx_set_reg(cpu, WHvX64RegisterRax, reg);\n+ } else {\n+ env->eip = exit_ctx->VpContext.Rip + exit_ctx->VpContext.InstructionLength;\n+ env->regs[R_EAX] = reg.Reg64;\n+ }\n return 0;\n } else if (!ctx->AccessInfo.StringOp && ctx->AccessInfo.IsWrite) {\n RAX(env) = ctx->Rax;\n handle_io(cpu, ctx->PortNumber, &RAX(env), 1, ctx->AccessInfo.AccessSize, 1);\n- whpx_bump_rip(cpu, exit_ctx);\n+ if (!cpu->vcpu_dirty) {\n+ whpx_bump_rip(cpu, exit_ctx);\n+ } else {\n+ env->eip = exit_ctx->VpContext.Rip + exit_ctx->VpContext.InstructionLength;\n+ }\n return 0;\n }\n \n", "prefixes": [ "v6", "11/11" ] }