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From 9000286ea20abb4e03c76ab8f873a6e9eb708377 Mon Sep 17 00:00:00 2001
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From: Maxim Levitsky <mlevitsk@redhat.com>
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Date: Thu, 14 Nov 2019 08:20:41 +0000
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Subject: [PATCH 1/8] qapi: fill in CpuInfoFast.arch in query-cpus-fast
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RH-Author: Maxim Levitsky <mlevitsk@redhat.com>
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Message-id: <20191114082041.20840-2-mlevitsk@redhat.com>
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Patchwork-id: 92245
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 1/1] qapi: fill in CpuInfoFast.arch in query-cpus-fast
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Bugzilla: 1730969
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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From: Laszlo Ersek <lersek@redhat.com>
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* Commit ca230ff33f89 added the @arch field to @CpuInfoFast, but it failed
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to set the new field in qmp_query_cpus_fast(), when TARGET_S390X was not
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defined. The updated @query-cpus-fast example in "qapi-schema.json"
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showed "arch":"x86" only because qmp_query_cpus_fast() calls g_malloc0()
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to allocate @CpuInfoFast, and the CPU_INFO_ARCH_X86 enum constant is
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generated with value 0.
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All @arch values other than @s390 implied the @CpuInfoOther sub-struct
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for @CpuInfoFast -- at the time of writing the patch --, thus no fields
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other than @arch needed to be set when TARGET_S390X was not defined. Set
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@arch now, by copying the corresponding assignments from
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qmp_query_cpus().
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* Commit 25fa194b7b11 added the @riscv enum constant to @CpuInfoArch (used
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in both @CpuInfo and @CpuInfoFast -- the return types of the @query-cpus
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and @query-cpus-fast commands, respectively), and assigned, in both
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return structures, the @CpuInfoRISCV sub-structure to the new enum
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value.
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However, qmp_query_cpus_fast() would not populate either the @arch field
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or the @CpuInfoRISCV sub-structure, when TARGET_RISCV was defined; only
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qmp_query_cpus() would.
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Assign @CpuInfoOther to the @riscv enum constant in @CpuInfoFast, and
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populate only the @arch field in qmp_query_cpus_fast(). Getting CPU
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state without interrupting KVM is an exceptional thing that only S390X
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does currently. Quoting Cornelia Huck <cohuck@redhat.com>, "s390x is
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exceptional in that it has state in QEMU that is actually interesting
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for upper layers and can be retrieved without performance penalty". See
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also
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<https://www.redhat.com/archives/libvir-list/2018-February/msg00121.html>.
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Cc: Cornelia Huck <cohuck@redhat.com>
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Cc: Eric Blake <eblake@redhat.com>
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Cc: Markus Armbruster <armbru@redhat.com>
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Cc: Viktor VM Mihajlovski <mihajlov@linux.vnet.ibm.com>
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Cc: qemu-stable@nongnu.org
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Fixes: ca230ff33f89bf7102cbfbc2328716da6750aaed
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Fixes: 25fa194b7b11901561532e435beb83d046899f7a
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Reviewed-by: Markus Armbruster <armbru@redhat.com>
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Message-Id: <20180427192852.15013-2-lersek@redhat.com>
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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(cherry picked from commit 96054f56396eaa0b9b5c681fc3e42a0004b17ade)
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Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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cpus.c | 16 +++++++++++++++-
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qapi/misc.json | 2 +-
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2 files changed, 16 insertions(+), 2 deletions(-)
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diff --git a/cpus.c b/cpus.c
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index 6100089..cea42f9 100644
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--- a/cpus.c
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+++ b/cpus.c
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@@ -2218,11 +2218,25 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
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info->value->props = props;
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}
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-#if defined(TARGET_S390X)
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+#if defined(TARGET_I386)
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+ info->value->arch = CPU_INFO_ARCH_X86;
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+#elif defined(TARGET_PPC)
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+ info->value->arch = CPU_INFO_ARCH_PPC;
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+#elif defined(TARGET_SPARC)
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+ info->value->arch = CPU_INFO_ARCH_SPARC;
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+#elif defined(TARGET_MIPS)
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+ info->value->arch = CPU_INFO_ARCH_MIPS;
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+#elif defined(TARGET_TRICORE)
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+ info->value->arch = CPU_INFO_ARCH_TRICORE;
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+#elif defined(TARGET_S390X)
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s390_cpu = S390_CPU(cpu);
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env = &s390_cpu->env;
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info->value->arch = CPU_INFO_ARCH_S390;
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info->value->u.s390.cpu_state = env->cpu_state;
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+#elif defined(TARGET_RISCV)
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+ info->value->arch = CPU_INFO_ARCH_RISCV;
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+#else
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+ info->value->arch = CPU_INFO_ARCH_OTHER;
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#endif
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if (!cur_item) {
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head = cur_item = info;
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diff --git a/qapi/misc.json b/qapi/misc.json
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index 5636f4a..104d013 100644
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--- a/qapi/misc.json
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+++ b/qapi/misc.json
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@@ -573,7 +573,7 @@
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'mips': 'CpuInfoOther',
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'tricore': 'CpuInfoOther',
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's390': 'CpuInfoS390',
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- 'riscv': 'CpuInfoRISCV',
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+ 'riscv': 'CpuInfoOther',
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'other': 'CpuInfoOther' } }
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##
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--
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1.8.3.1
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