#define VIR_FROM_THIS VIR_FROM_CAPABILITIES
#define SYSFS_SYSTEM_PATH "/sys/devices/system"
+#define SYSFS_RESCTRL_PATH "/sys/fs/resctrl"
VIR_LOG_INIT("conf.capabilities")
virCapsHostCacheBankPtr *caches)
{
size_t i = 0;
+ size_t j = 0;
+ int indent = virBufferGetIndent(buf, false);
+ virBuffer controlBuf = VIR_BUFFER_INITIALIZER;
if (!ncaches)
return 0;
*/
virBufferAsprintf(buf,
"<bank id='%u' level='%u' type='%s' "
- "size='%llu' unit='%s' cpus='%s'/>\n",
+ "size='%llu' unit='%s' cpus='%s'",
bank->id, bank->level,
virCacheTypeToString(bank->type),
bank->size >> (kilos * 10),
kilos ? "KiB" : "B",
cpus_str);
+ virBufferAdjustIndent(&controlBuf, indent + 4);
+ for (j = 0; j < bank->ncontrols; j++) {
+ bool min_kilos = !(bank->controls[j]->min % 1024);
+ virBufferAsprintf(&controlBuf,
+ "<control min='%llu' unit='%s' "
+ "type='%s' maxAllocs='%u'/>\n",
+ bank->controls[j]->min >> (min_kilos * 10),
+ min_kilos ? "KiB" : "B",
+ virCacheTypeToString(bank->controls[j]->scope),
+ bank->controls[j]->max_allocation);
+ }
+
+ if (virBufferUse(&controlBuf)) {
+ virBufferAddLit(buf, ">\n");
+ virBufferAddBuffer(buf, &controlBuf);
+ virBufferAddLit(buf, "</bank>\n");
+ } else {
+ virBufferAddLit(buf, "/>\n");
+ }
+
VIR_FREE(cpus_str);
}
void
virCapsHostCacheBankFree(virCapsHostCacheBankPtr ptr)
{
+ size_t i;
+
if (!ptr)
return;
virBitmapFree(ptr->cpus);
+ for (i = 0; i < ptr->ncontrols; i++)
+ VIR_FREE(ptr->controls[i]);
+ VIR_FREE(ptr->controls);
VIR_FREE(ptr);
}
+/*
+ * This function tests which TYPE of cache control is supported
+ * Return values are:
+ * -1: not supported
+ * 0: CAT
+ * 1: CDP
+ */
+static int
+virCapabilitiesGetCacheControlType(virCapsHostCacheBankPtr bank)
+{
+ int ret = -1;
+ char *path = NULL;
+
+ if (virAsprintf(&path,
+ SYSFS_RESCTRL_PATH "/info/L%u",
+ bank->level) < 0)
+ return -1;
+
+ if (virFileExists(path)) {
+ ret = 0;
+ } else {
+ VIR_FREE(path);
+ /*
+ * If CDP is enabled, there will be both CODE and DATA, but it's enough
+ * to check one of those only.
+ */
+ if (virAsprintf(&path,
+ SYSFS_RESCTRL_PATH "/info/L%uCODE",
+ bank->level) < 0)
+ return -1;
+ if (virFileExists(path))
+ ret = 1;
+ }
+
+ VIR_FREE(path);
+ return ret;
+}
+
+static int
+virCapabilitiesGetCacheControl(virCapsHostCacheBankPtr bank,
+ virCacheType scope)
+{
+ int ret = -1;
+ char *path = NULL;
+ char *cbm_mask = NULL;
+ char *type_upper = NULL;
+ unsigned int min_cbm_bits = 0;
+ virCapsHostCacheControlPtr control;
+
+ if (VIR_ALLOC(control) < 0)
+ goto cleanup;
+
+ if (scope != VIR_CACHE_TYPE_BOTH &&
+ virStringToUpper(&type_upper, virCacheTypeToString(scope)) < 0)
+ goto cleanup;
+
+ if (virFileReadValueUint(&control->max_allocation,
+ SYSFS_RESCTRL_PATH "/info/L%u%s/num_closids",
+ bank->level,
+ type_upper ? type_upper : "") < 0)
+ goto cleanup;
+
+ if (virFileReadValueString(&cbm_mask,
+ SYSFS_RESCTRL_PATH
+ "/info/L%u%s/cbm_mask",
+ bank->level,
+ type_upper ? type_upper: "") < 0)
+ goto cleanup;
+
+ if (virFileReadValueUint(&min_cbm_bits,
+ SYSFS_RESCTRL_PATH "/info/L%u%s/min_cbm_bits",
+ bank->level,
+ type_upper ? type_upper : "") < 0)
+ goto cleanup;
+
+ virStringTrimOptionalNewline(cbm_mask);
+
+ /* cbm_mask: cache bit mask, it's in hex, eg: fffff */
+ control->min = min_cbm_bits * bank->size / (strlen(cbm_mask) * 4);
+
+ control->scope = scope;
+
+ if (VIR_APPEND_ELEMENT(bank->controls,
+ bank->ncontrols,
+ control) < 0)
+ goto cleanup;
+
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(path);
+ VIR_FREE(cbm_mask);
+ VIR_FREE(type_upper);
+ VIR_FREE(control);
+ return ret;
+}
+
int
virCapabilitiesInitCaches(virCapsPtr caps)
{
ssize_t pos = -1;
DIR *dirp = NULL;
int ret = -1;
+ int typeret;
char *path = NULL;
char *type = NULL;
struct dirent *ent = NULL;
SYSFS_SYSTEM_PATH, pos, ent->d_name) < 0)
goto cleanup;
+ typeret = virCapabilitiesGetCacheControlType(bank);
+
+ if (typeret == 0) {
+ if (virCapabilitiesGetCacheControl(bank,
+ VIR_CACHE_TYPE_BOTH) < 0)
+ goto cleanup;
+ } else if (typeret == 1) {
+ if (virCapabilitiesGetCacheControl(bank,
+ VIR_CACHE_TYPE_CODE) < 0 ||
+ virCapabilitiesGetCacheControl(bank,
+ VIR_CACHE_TYPE_DATA) < 0)
+ goto cleanup;
+ }
+
kernel_type = virCacheKernelTypeFromString(type);
if (kernel_type < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown cache type '%s'"), type);
goto cleanup;
}
+
bank->type = kernel_type;
VIR_FREE(type);
--- /dev/null
+<capabilities>
+
+ <host>
+ <cpu>
+ <arch>x86_64</arch>
+ </cpu>
+ <power_management/>
+ <migration_features>
+ <live/>
+ </migration_features>
+ <topology>
+ <cells num='2'>
+ <cell id='0'>
+ <memory unit='KiB'>1048576</memory>
+ <pages unit='KiB' size='4'>2048</pages>
+ <pages unit='KiB' size='2048'>4096</pages>
+ <pages unit='KiB' size='1048576'>6144</pages>
+ <cpus num='6'>
+ <cpu id='0' socket_id='0' core_id='0' siblings='0'/>
+ <cpu id='1' socket_id='0' core_id='1' siblings='1'/>
+ <cpu id='2' socket_id='0' core_id='2' siblings='2'/>
+ <cpu id='3' socket_id='0' core_id='3' siblings='3'/>
+ <cpu id='4' socket_id='0' core_id='4' siblings='4'/>
+ <cpu id='5' socket_id='0' core_id='5' siblings='5'/>
+ </cpus>
+ </cell>
+ <cell id='1'>
+ <memory unit='KiB'>2097152</memory>
+ <pages unit='KiB' size='4'>4096</pages>
+ <pages unit='KiB' size='2048'>6144</pages>
+ <pages unit='KiB' size='1048576'>8192</pages>
+ <cpus num='6'>
+ <cpu id='6' socket_id='1' core_id='0' siblings='6'/>
+ <cpu id='7' socket_id='1' core_id='1' siblings='7'/>
+ <cpu id='8' socket_id='1' core_id='2' siblings='8'/>
+ <cpu id='9' socket_id='1' core_id='3' siblings='9'/>
+ <cpu id='10' socket_id='1' core_id='4' siblings='10'/>
+ <cpu id='11' socket_id='1' core_id='5' siblings='11'/>
+ </cpus>
+ </cell>
+ </cells>
+ </topology>
+ <cache>
+ <bank id='0' level='3' type='both' size='15360' unit='KiB' cpus='0-5'>
+ <control min='768' unit='KiB' type='code' maxAllocs='8'/>
+ <control min='768' unit='KiB' type='data' maxAllocs='8'/>
+ </bank>
+ <bank id='1' level='3' type='both' size='15360' unit='KiB' cpus='6-11'>
+ <control min='768' unit='KiB' type='code' maxAllocs='8'/>
+ <control min='768' unit='KiB' type='data' maxAllocs='8'/>
+ </bank>
+ </cache>
+ </host>
+
+</capabilities>
projects / thirdparty / libvirt.git / commitdiff
