Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2231348/?format=api
{ "id": 2231348, "url": "http://patchwork.ozlabs.org/api/patches/2231348/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430160307.634093-2-cohuck@redhat.com/", "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": "<20260430160307.634093-2-cohuck@redhat.com>", "list_archive_url": null, "date": "2026-04-30T16:02:57", "name": "[PULL,v2,01/11] target/s390x/kvm: Simplify the async pfault handling code", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "631e1d4cf187ebeb0aabe110257776ddcb44a996", "submitter": { "id": 71914, "url": "http://patchwork.ozlabs.org/api/people/71914/?format=api", "name": "Cornelia Huck", "email": "cohuck@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430160307.634093-2-cohuck@redhat.com/mbox/", "series": [ { "id": 502335, "url": "http://patchwork.ozlabs.org/api/series/502335/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502335", "date": "2026-04-30T16:02:58", "name": "[PULL,v2,01/11] target/s390x/kvm: Simplify the async pfault handling code", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502335/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231348/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231348/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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=At23GtMH;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g5zZK4xG0z1xqf\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 01 May 2026 02:06:49 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wITs0-0000xE-AZ; Thu, 30 Apr 2026 12:04:08 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <cohuck@redhat.com>) id 1wITrN-0007d1-Np\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 12:03:30 -0400", "from us-smtp-delivery-124.mimecast.com ([170.10.133.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <cohuck@redhat.com>) id 1wITrH-00079p-QA\n for qemu-devel@nongnu.org; Thu, 30 Apr 2026 12:03:28 -0400", "from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-364-ysVl5qMaMWKfXlaZvHY3Jg-1; Thu,\n 30 Apr 2026 12:03:16 -0400", "from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id 312E519560B4; Thu, 30 Apr 2026 16:03:15 +0000 (UTC)", "from gondolin.redhat.com (unknown [10.44.50.47])\n by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id 1C31D18001ED; Thu, 30 Apr 2026 16:03:12 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1777565001;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=xRYLKOrmE7/oEuDtADR2OmYYnbN1a9jH/1mSe5dCafw=;\n b=At23GtMHrDQZeVwzahr8GA9GCqJQUEhEiuUI82v3kBMfnD1owbMWJHrqONK5A9u/m5TRQw\n 6qyocV+YnXryaciYQrDDbImM5EfTaoWQH6BOG6b9DtacGN1KNhze1JghRMcriYL8ofOSYA\n s0Iyzu1OJSEV5h8CM31k5x0AYIqPPM4=", "X-MC-Unique": "ysVl5qMaMWKfXlaZvHY3Jg-1", "X-Mimecast-MFC-AGG-ID": "ysVl5qMaMWKfXlaZvHY3Jg_1777564995", "From": "Cornelia Huck <cohuck@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "qemu-s390x@nongnu.org, Thomas Huth <thuth@redhat.com>,\n Eric Farman <farman@linux.ibm.com>,\n Matthew Rosato <mjrosato@linux.ibm.com>,\n Christian Borntraeger <borntraeger@linux.ibm.com>,\n Cornelia Huck <cohuck@redhat.com>", "Subject": "[PULL v2 01/11] target/s390x/kvm: Simplify the async pfault handling\n code", "Date": "Thu, 30 Apr 2026 18:02:57 +0200", "Message-ID": "<20260430160307.634093-2-cohuck@redhat.com>", "In-Reply-To": "<20260430160307.634093-1-cohuck@redhat.com>", "References": "<20260430160307.634093-1-cohuck@redhat.com>", "MIME-Version": "1.0", "Content-type": "text/plain", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.111", "Received-SPF": "pass client-ip=170.10.133.124; envelope-from=cohuck@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_PASS=-0.001, 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": "From: Thomas Huth <thuth@redhat.com>\n\nSince commit 126e7f78036 (\"kvm: require KVM_CAP_IOEVENTFD and\nKVM_CAP_IOEVENTFD_ANY_LENGTH\") we require at least kernel v4.4 to\nbe able to use KVM. KVM_CAP_ASYNC_PF is available in the kernel\nsince v3.15 and KVM_SYNC_PFAULT is available since kernel v3.18,\nso we can assume now that they are available in all supported\nkernels. Thus simplify the code a little bit by removing the\nchecks for these features.\n\nSigned-off-by: Thomas Huth <thuth@redhat.com>\nReviewed-by: Eric Farman <farman@linux.ibm.com>\nReviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>\nAcked-by: Christian Borntraeger <borntraeger@linux.ibm.com>\nMessage-ID: <20260317134531.460141-1-thuth@redhat.com>\nSigned-off-by: Cornelia Huck <cohuck@redhat.com>\n---\n target/s390x/kvm/kvm.c | 52 +++++++++---------------------------------\n 1 file changed, 11 insertions(+), 41 deletions(-)", "diff": "diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c\nindex 54d28e37d4dd..133e8c12fd4d 100644\n--- a/target/s390x/kvm/kvm.c\n+++ b/target/s390x/kvm/kvm.c\n@@ -140,7 +140,6 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {\n KVM_CAP_LAST_INFO\n };\n \n-static int cap_async_pf;\n static int cap_mem_op;\n static int cap_mem_op_extension;\n static int cap_s390_irq;\n@@ -333,6 +332,7 @@ int kvm_arch_get_default_type(MachineState *ms)\n int kvm_arch_init(MachineState *ms, KVMState *s)\n {\n int required_caps[] = {\n+ KVM_CAP_ASYNC_PF,\n KVM_CAP_DEVICE_CTRL,\n KVM_CAP_SYNC_REGS,\n };\n@@ -340,7 +340,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)\n for (int i = 0; i < ARRAY_SIZE(required_caps); i++) {\n if (!kvm_check_extension(s, required_caps[i])) {\n error_report(\"KVM is missing capability #%d - \"\n- \"please use kernel 3.15 or newer\", required_caps[i]);\n+ \"please use kernel 4.4 or newer\", required_caps[i]);\n return -1;\n }\n }\n@@ -354,7 +354,6 @@ int kvm_arch_init(MachineState *ms, KVMState *s)\n return -1;\n }\n \n- cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);\n cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);\n cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION);\n mem_op_storage_key_support = cap_mem_op_extension > 0;\n@@ -466,7 +465,8 @@ static int can_sync_regs(CPUState *cs, int regs)\n }\n \n #define KVM_SYNC_REQUIRED_REGS (KVM_SYNC_GPRS | KVM_SYNC_ACRS | \\\n- KVM_SYNC_CRS | KVM_SYNC_PREFIX)\n+ KVM_SYNC_CRS | KVM_SYNC_PREFIX | \\\n+ KVM_SYNC_PFAULT)\n \n int kvm_arch_put_registers(CPUState *cs, KvmPutState level, Error **errp)\n {\n@@ -550,25 +550,10 @@ int kvm_arch_put_registers(CPUState *cs, KvmPutState level, Error **errp)\n }\n \n /* pfault parameters */\n- if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {\n- cs->kvm_run->s.regs.pft = env->pfault_token;\n- cs->kvm_run->s.regs.pfs = env->pfault_select;\n- cs->kvm_run->s.regs.pfc = env->pfault_compare;\n- cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT;\n- } else if (cap_async_pf) {\n- r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);\n- if (r < 0) {\n- return r;\n- }\n- r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);\n- if (r < 0) {\n- return r;\n- }\n- r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);\n- if (r < 0) {\n- return r;\n- }\n- }\n+ cs->kvm_run->s.regs.pft = env->pfault_token;\n+ cs->kvm_run->s.regs.pfs = env->pfault_select;\n+ cs->kvm_run->s.regs.pfc = env->pfault_compare;\n+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT;\n \n if (can_sync_regs(cs, KVM_SYNC_GSCB)) {\n memcpy(cs->kvm_run->s.regs.gscb, env->gscb, 32);\n@@ -673,24 +658,9 @@ int kvm_arch_get_registers(CPUState *cs, Error **errp)\n }\n \n /* pfault parameters */\n- if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {\n- env->pfault_token = cs->kvm_run->s.regs.pft;\n- env->pfault_select = cs->kvm_run->s.regs.pfs;\n- env->pfault_compare = cs->kvm_run->s.regs.pfc;\n- } else if (cap_async_pf) {\n- r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);\n- if (r < 0) {\n- return r;\n- }\n- r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);\n- if (r < 0) {\n- return r;\n- }\n- r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);\n- if (r < 0) {\n- return r;\n- }\n- }\n+ env->pfault_token = cs->kvm_run->s.regs.pft;\n+ env->pfault_select = cs->kvm_run->s.regs.pfs;\n+ env->pfault_compare = cs->kvm_run->s.regs.pfc;\n \n if (can_sync_regs(cs, KVM_SYNC_DIAG318)) {\n env->diag318_info = cs->kvm_run->s.regs.diag318;\n", "prefixes": [ "PULL", "v2", "01/11" ] }