From c640f382eb798caf2039cd6d214ece72744454c3 Mon Sep 17 00:00:00 2001 From: Zhenyu Zheng Date: Thu, 24 Sep 2020 22:12:21 +0800 Subject: [PATCH] cpu: Modify virCPUarmCompare to perform compare actions Modify virCPUarmCompare in cpu_arm.c to perform compare action. This patch only adds host to host CPU compare, the rest cases remains the same. This is useful for source and destination host compare during migrations to avoid migration between different CPU models that have different CPU freatures. Signed-off-by: Zhenyu Zheng Signed-off-by: Michal Privoznik Reviewed-by: Daniel Henrique Barboza Reviewed-by: Michal Privoznik --- src/cpu/cpu_arm.c | 39 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/src/cpu/cpu_arm.c b/src/cpu/cpu_arm.c index 939a3b8390..31997b59cd 100644 --- a/src/cpu/cpu_arm.c +++ b/src/cpu/cpu_arm.c @@ -463,10 +463,43 @@ virCPUarmBaseline(virCPUDefPtr *cpus, } static virCPUCompareResult -virCPUarmCompare(virCPUDefPtr host G_GNUC_UNUSED, - virCPUDefPtr cpu G_GNUC_UNUSED, - bool failMessages G_GNUC_UNUSED) +virCPUarmCompare(virCPUDefPtr host, + virCPUDefPtr cpu, + bool failIncompatible) { + /* Only support host to host CPU compare for ARM */ + if (cpu->type != VIR_CPU_TYPE_HOST) + return VIR_CPU_COMPARE_IDENTICAL; + + if (!host || !host->model) { + if (failIncompatible) { + virReportError(VIR_ERR_CPU_INCOMPATIBLE, "%s", + _("unknown host CPU")); + return VIR_CPU_COMPARE_ERROR; + } + + VIR_WARN("unknown host CPU"); + return VIR_CPU_COMPARE_INCOMPATIBLE; + } + + /* Compare vendor and model to check if CPUs are identical */ + if (STRNEQ_NULLABLE(host->vendor, cpu->vendor) || + STRNEQ_NULLABLE(host->model, cpu->model)) { + VIR_DEBUG("Host CPU model does not match required CPU " + "vendor %s or(and) model %s", + NULLSTR(cpu->vendor), NULLSTR(cpu->model)); + + if (failIncompatible) { + virReportError(VIR_ERR_CPU_INCOMPATIBLE, + _("Host CPU model does not match required CPU " + "vendor %s or(and) model %s"), + NULLSTR(cpu->vendor), NULLSTR(cpu->model)); + return VIR_CPU_COMPARE_ERROR; + } + + return VIR_CPU_COMPARE_INCOMPATIBLE; + } + return VIR_CPU_COMPARE_IDENTICAL; }