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GET /api/patches/816830/?format=api
{ "id": 816830, "url": "http://patchwork.ozlabs.org/api/patches/816830/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170921120415.241151389@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": "<20170921120415.241151389@redhat.com>", "list_archive_url": null, "date": "2017-09-21T12:03:43", "name": "[2/2] qemu: kvm: support RT_PRIO_HC hypercall", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "7a7dbf87f45398d450d6a1868a1c94be63596f0f", "submitter": { "id": 2826, "url": "http://patchwork.ozlabs.org/api/people/2826/?format=api", "name": "Marcelo Tosatti", "email": "mtosatti@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170921120415.241151389@redhat.com/mbox/", "series": [ { "id": 4364, "url": "http://patchwork.ozlabs.org/api/series/4364/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=4364", "date": "2017-09-21T12:03:42", "name": "support RT_PRIO_HC hypercall", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/4364/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/816830/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/816830/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@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=<UNKNOWN>)", "ext-mx02.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com", "ext-mx02.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=mtosatti@redhat.com" ], "Received": [ "from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xyb5L17fCz9t43\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 21 Sep 2017 22:09:42 +1000 (AEST)", "from localhost ([::1]:53380 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1dv0IW-00036Y-4I\n\tfor incoming@patchwork.ozlabs.org; Thu, 21 Sep 2017 08:09:40 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:38589)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <mtosatti@redhat.com>) id 1dv0Ej-0000y5-MX\n\tfor qemu-devel@nongnu.org; Thu, 21 Sep 2017 08:05:49 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <mtosatti@redhat.com>) id 1dv0Ed-0007ev-Hq\n\tfor qemu-devel@nongnu.org; Thu, 21 Sep 2017 08:05:45 -0400", "from mx1.redhat.com ([209.132.183.28]:50414)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from <mtosatti@redhat.com>) id 1dv0Ed-0007eY-3P\n\tfor qemu-devel@nongnu.org; Thu, 21 Sep 2017 08:05:39 -0400", "from smtp.corp.redhat.com\n\t(int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id 1F709883DF;\n\tThu, 21 Sep 2017 12:05:38 +0000 (UTC)", "from amt.cnet (ovpn-116-16.gru2.redhat.com [10.97.116.16])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 3D42A614F9;\n\tThu, 21 Sep 2017 12:05:34 +0000 (UTC)", "from amt.cnet (localhost [127.0.0.1])\n\tby amt.cnet (Postfix) with ESMTP id 472FB105058;\n\tThu, 21 Sep 2017 09:05:10 -0300 (BRT)", "(from marcelo@localhost)\n\tby amt.cnet (8.14.7/8.14.7/Submit) id v8LC5AEg008875;\n\tThu, 21 Sep 2017 09:05:10 -0300" ], "DMARC-Filter": "OpenDMARC Filter v1.3.2 mx1.redhat.com 1F709883DF", "Message-Id": "<20170921120415.241151389@redhat.com>", "User-Agent": "quilt/0.60-1", "Date": "Thu, 21 Sep 2017 09:03:43 -0300", "From": "Marcelo Tosatti <mtosatti@redhat.com>", "To": "kvm@vger.kernel.org, qemu-devel@nongnu.org", "References": "<20170921120341.590850215@redhat.com>", "Content-Disposition": "inline; filename=qemu-toggle-kvmrt-prio", "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.13", "X-Greylist": "Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.26]);\n\tThu, 21 Sep 2017 12:05:38 +0000 (UTC)", "X-detected-operating-system": "by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]", "X-Received-From": "209.132.183.28", "Subject": "[Qemu-devel] [patch 2/2] qemu: kvm: support RT_PRIO_HC hypercall", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://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\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "Marcelo Tosatti <mtosatti@redhat.com>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "Add the following CPU options:\n\nallow-rt-prio-hc: allow guest to execute hypercall to change vcpu \nthread priority.\n\nrt-prio: SCHED_FIFO priority to be used when that hypercall is invoked.\n\nSee kernel patchset for details about this hypercall.\n\nSigned-off-by: Marcelo Tosatti <mtosatti@redhat.com>\n\n---\n target/i386/cpu.c | 2 ++\n target/i386/cpu.h | 4 ++++\n target/i386/kvm.c | 23 +++++++++++++++++++++++\n 3 files changed, 29 insertions(+)", "diff": "Index: qemu-fifoprio/target/i386/cpu.c\n===================================================================\n--- qemu-fifoprio.orig/target/i386/cpu.c\n+++ qemu-fifoprio/target/i386/cpu.c\n@@ -4106,6 +4106,8 @@ static Property x86_cpu_properties[] = {\n false),\n DEFINE_PROP_BOOL(\"vmware-cpuid-freq\", X86CPU, vmware_cpuid_freq, true),\n DEFINE_PROP_BOOL(\"tcg-cpuid\", X86CPU, expose_tcg, true),\n+ DEFINE_PROP_BOOL(\"allow-rt-prio-hc\", X86CPU, allow_rt_prio_hc, false),\n+ DEFINE_PROP_UINT32(\"rt-prio\", X86CPU, rt_prio_hc, 0),\n DEFINE_PROP_END_OF_LIST()\n };\n \nIndex: qemu-fifoprio/target/i386/cpu.h\n===================================================================\n--- qemu-fifoprio.orig/target/i386/cpu.h\n+++ qemu-fifoprio/target/i386/cpu.h\n@@ -1215,6 +1215,7 @@ struct X86CPU {\n bool hyperv_runtime;\n bool hyperv_synic;\n bool hyperv_stimer;\n+ bool allow_rt_prio_hc;\n bool check_cpuid;\n bool enforce_cpuid;\n bool expose_kvm;\n@@ -1270,6 +1271,9 @@ struct X86CPU {\n /* Number of physical address bits supported */\n uint32_t phys_bits;\n \n+ /* RT priority of VCPU thread, when hypercall is invoked by guest */\n+ uint32_t rt_prio_hc;\n+\n /* in order to simplify APIC support, we leave this pointer to the\n user */\n struct DeviceState *apic_state;\nIndex: qemu-fifoprio/target/i386/kvm.c\n===================================================================\n--- qemu-fifoprio.orig/target/i386/kvm.c\n+++ qemu-fifoprio/target/i386/kvm.c\n@@ -673,6 +673,28 @@ static int hyperv_handle_properties(CPUS\n \n static Error *invtsc_mig_blocker;\n \n+static int enable_allow_rt_prio_hc(CPUState *cs)\n+{\n+ int ret;\n+ struct kvm_vcpu_rt_prio rt_prio;\n+ X86CPU *cpu = X86_CPU(cs);\n+\n+ if (!kvm_check_extension(kvm_state, KVM_CAP_VCPU_RT_PRIO_HC)) {\n+ fprintf(stderr, \"RT prio hypercall not supported by kernel\\n\");\n+ return -ENOSYS;\n+ }\n+\n+ rt_prio.sched_priority = cpu->rt_prio_hc;\n+ rt_prio.enabled = 1;\n+\n+ ret = kvm_vcpu_ioctl(cs, KVM_ENABLE_VCPU_RT_PRIO_HC, &rt_prio);\n+ if (ret) {\n+ fprintf(stderr, \"RT prio hypercall failed, ret=%d\\n\", ret);\n+ }\n+\n+ return ret;\n+}\n+\n #define KVM_MAX_CPUID_ENTRIES 100\n \n int kvm_arch_init_vcpu(CPUState *cs)\n@@ -758,6 +780,12 @@ int kvm_arch_init_vcpu(CPUState *cs)\n has_msr_hv_hypercall = true;\n }\n \n+ if (cpu->allow_rt_prio_hc) {\n+ if (enable_allow_rt_prio_hc(cs)) {\n+ abort();\n+ }\n+ }\n+\n if (cpu->expose_kvm) {\n memcpy(signature, \"KVMKVMKVM\\0\\0\\0\", 12);\n c = &cpuid_data.entries[cpuid_i++];\n", "prefixes": [ "2/2" ] }