[libvirt] [PATCH 08/12] Introduce virDomainHypervisorPinAdd and virDomainHypervisorPinDel functions

From: Tang Chen <tangchen(a)cn.fujitsu.com&gt; Introduce 2 APIs to support hypervisor threads pin. 1) virDomainHypervisorPinAdd: setup hypervisor threads pin with a given cpumap string. 2) virDomainHypervisorPinDel: remove all hypervisor threads pin. Signed-off-by: Tang Chen <tangchen(a)cn.fujitsu.com&gt; Signed-off-by: Hu Tao <hutao(a)cn.fujitsu.com&gt; --- src/conf/domain_conf.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++ src/conf/domain_conf.h | 6 ++++ src/libvirt_private.syms | 2 ++ 3 files changed, 80 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index bedbf79..cec158d 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -10957,6 +10957,78 @@ virDomainVcpuPinDel(virDomainDefPtr def, int vcpu) return 0; } +int +virDomainHypervisorPinAdd(virDomainDefPtr def, + unsigned char *cpumap, + int maplen) +{ + virDomainVcpuPinDefPtr hypervisorpin = NULL; + char *cpumask = NULL; + int i; + + if (VIR_ALLOC_N(cpumask, VIR_DOMAIN_CPUMASK_LEN) < 0) { + virReportOOMError(); + goto cleanup; + } + + /* Convert bitmap (cpumap) to cpumask, which is byte map. */ + for (i = 0; i < maplen; i++) { + int cur; + + for (cur = 0; cur < 8; cur++) { + if (cpumap[i] & (1 << cur)) + cpumask[i * 8 + cur] = 1; + } + } + + if (!def->cputune.hypervisorpin) { + /* No hypervisorpin exists yet. */ + if (VIR_ALLOC(hypervisorpin) < 0) { + virReportOOMError(); + goto cleanup; + } + + hypervisorpin->vcpuid = -1; + hypervisorpin->cpumask = cpumask; + def->cputune.hypervisorpin = hypervisorpin; + } else { + /* Since there is only 1 hypervisorpin for each vm, + * juest replace the old one. + */ + VIR_FREE(def->cputune.hypervisorpin->cpumask); + def->cputune.hypervisorpin->cpumask = cpumask; + } + + return 0; + +cleanup: + if (cpumask) + VIR_FREE(cpumask); + return -1; +} + +int +virDomainHypervisorPinDel(virDomainDefPtr def) +{ + virDomainVcpuPinDefPtr hypervisorpin = NULL; + + /* No hypervisorpin exists yet */ + if (!def->cputune.hypervisorpin) { + return 0; + } + + hypervisorpin = def->cputune.hypervisorpin; + + VIR_FREE(hypervisorpin->cpumask); + VIR_FREE(hypervisorpin); + def->cputune.hypervisorpin = NULL; + + if (def->cputune.hypervisorpin) + return -1; + + return 0; +} + static int virDomainLifecycleDefFormat(virBufferPtr buf, int type, diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 11f0eb0..64096d5 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1985,6 +1985,12 @@ int virDomainVcpuPinAdd(virDomainDefPtr def, int virDomainVcpuPinDel(virDomainDefPtr def, int vcpu); +int virDomainHypervisorPinAdd(virDomainDefPtr def, + unsigned char *cpumap, + int maplen); + +int virDomainHypervisorPinDel(virDomainDefPtr def); + int virDomainDiskIndexByName(virDomainDefPtr def, const char *name, bool allow_ambiguous); const char *virDomainDiskPathByName(virDomainDefPtr, const char *name); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 867c2e7..a57486a 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -491,6 +491,8 @@ virDomainTimerTrackTypeFromString; virDomainTimerTrackTypeToString; virDomainVcpuPinAdd; virDomainVcpuPinDel; +virDomainHypervisorPinAdd; +virDomainHypervisorPinDel; virDomainVcpuPinFindByVcpu; virDomainVcpuPinIsDuplicate; virDomainVideoDefFree; -- 1.7.10.2