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xenconfig: Add support for 'passthrough' hypervisor feature

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Add support for xl.cfg(5) 'passthrough' option in the domXML-to-xenconfig
configuration converter.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Jim Fehlig 2020-04-16 08:31:48 -06:00
parent 9cb8bc6ff1
commit b523e22521
2 changed files with 46 additions and 6 deletions
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2
src/libvirt_private.syms
View File

@ -649,6 +649,8 @@ virDomainWatchdogActionTypeToString;
virDomainWatchdogDefFree;
virDomainWatchdogModelTypeFromString;
virDomainWatchdogModelTypeToString;
virDomainXenPassthroughModeTypeFromString;
virDomainXenPassthroughModeTypeToString;
virDomainXMLOptionGetNamespace;
virDomainXMLOptionGetSaveCookie;
virDomainXMLOptionNew;

50
src/libxl/xen_common.c
View File

@ -530,14 +530,14 @@ xenParseCPU(virConfPtr conf,
static int
xenParseHypervisorFeatures(virConfPtr conf, virDomainDefPtr def)
{
g_autofree char *tsc_mode = NULL;
g_autofree char *strval = NULL;
virDomainTimerDefPtr timer;
int val = 0;
if (xenConfigGetString(conf, "tsc_mode", &tsc_mode, NULL) < 0)
if (xenConfigGetString(conf, "tsc_mode", &strval, NULL) < 0)
return -1;
if (tsc_mode) {
if (strval) {
if (VIR_EXPAND_N(def->clock.timers, def->clock.ntimers, 1) < 0 ||
VIR_ALLOC(timer) < 0)
return -1;
@ -547,16 +547,40 @@ xenParseHypervisorFeatures(virConfPtr conf, virDomainDefPtr def)
timer->tickpolicy = -1;
timer->mode = VIR_DOMAIN_TIMER_MODE_AUTO;
timer->track = -1;
if (STREQ_NULLABLE(tsc_mode, "always_emulate"))
if (STREQ_NULLABLE(strval, "always_emulate"))
timer->mode = VIR_DOMAIN_TIMER_MODE_EMULATE;
else if (STREQ_NULLABLE(tsc_mode, "native"))
else if (STREQ_NULLABLE(strval, "native"))
timer->mode = VIR_DOMAIN_TIMER_MODE_NATIVE;
else if (STREQ_NULLABLE(tsc_mode, "native_paravirt"))
else if (STREQ_NULLABLE(strval, "native_paravirt"))
timer->mode = VIR_DOMAIN_TIMER_MODE_PARAVIRT;
def->clock.timers[def->clock.ntimers - 1] = timer;
}
if (xenConfigGetString(conf, "passthrough", &strval, NULL) < 0)
return -1;
if (strval) {
if (STREQ(strval, "disabled")) {
def->features[VIR_DOMAIN_FEATURE_XEN] = VIR_TRISTATE_SWITCH_OFF;
def->xen_features[VIR_DOMAIN_XEN_PASSTHROUGH] = VIR_TRISTATE_SWITCH_OFF;
} else if (STREQ(strval, "enabled")) {
def->features[VIR_DOMAIN_FEATURE_XEN] = VIR_TRISTATE_SWITCH_ON;
def->xen_features[VIR_DOMAIN_XEN_PASSTHROUGH] = VIR_TRISTATE_SWITCH_ON;
} else if (STREQ(strval, "sync_pt")) {
def->features[VIR_DOMAIN_FEATURE_XEN] = VIR_TRISTATE_SWITCH_ON;
def->xen_features[VIR_DOMAIN_XEN_PASSTHROUGH] = VIR_TRISTATE_SWITCH_ON;
def->xen_passthrough_mode = VIR_DOMAIN_XEN_PASSTHROUGH_MODE_SYNC_PT;
} else if (STREQ(strval, "share_pt")) {
def->features[VIR_DOMAIN_FEATURE_XEN] = VIR_TRISTATE_SWITCH_ON;
def->xen_features[VIR_DOMAIN_XEN_PASSTHROUGH] = VIR_TRISTATE_SWITCH_ON;
def->xen_passthrough_mode = VIR_DOMAIN_XEN_PASSTHROUGH_MODE_SHARE_PT;
} else {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Invalid passthrough mode %s"), strval);
}
}
if (def->os.type == VIR_DOMAIN_OSTYPE_HVM) {
if (xenConfigGetBool(conf, "pae", &val, 1) < 0)
return -1;
@ -2163,6 +2187,20 @@ xenFormatHypervisorFeatures(virConfPtr conf, virDomainDefPtr def)
}
}
if (def->features[VIR_DOMAIN_FEATURE_XEN] == VIR_TRISTATE_SWITCH_ON) {
if (def->xen_features[VIR_DOMAIN_XEN_PASSTHROUGH] == VIR_TRISTATE_SWITCH_ON) {
if (def->xen_passthrough_mode == VIR_DOMAIN_XEN_PASSTHROUGH_MODE_SYNC_PT ||
def->xen_passthrough_mode == VIR_DOMAIN_XEN_PASSTHROUGH_MODE_SHARE_PT) {
if (xenConfigSetString(conf, "passthrough",
virDomainXenPassthroughModeTypeToString(def->xen_passthrough_mode)) < 0)
return -1;
} else {
if (xenConfigSetString(conf, "passthrough", "enabled") < 0)
return -1;
}
}
}
for (i = 0; i < def->clock.ntimers; i++) {
switch ((virDomainTimerNameType)def->clock.timers[i]->name) {
case VIR_DOMAIN_TIMER_NAME_TSC: