NuKVM/libvirt
3
0
Fork 0
mirror of https://github.com/libvirt/libvirt.git synced 2025-02-25 18:55:26 -06:00
Code Issues Packages Projects Releases Wiki Activity

conf: Add rom.enabled attribute for PCI devices

Browse Source 
The attribute can be used to disable ROM loading completely
for a device.

This might be needed because, even when the guest is configured
such that the PCI ROM will not be loaded in the PCI BAR, some
hypervisors (eg. QEMU) might still make it available to the
guest in a form (eg. fw_cfg) that some firmwares (eg. SeaBIOS)
will consume, thus not achieving the desired result.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
Andrea Bolognani
2018-04-19 17:55:41 +02:00
parent 868136624f
commit c4466179f4
4 changed files with 36 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
src/conf/device_conf.h
View File

@@ -153,6 +153,7 @@ struct _virDomainDeviceInfo {
} master;
/* rombar and romfile are only used for pci hostdev and network
* devices. */
int romenabled; /* enum virTristateBool */
int rombar; /* enum virTristateSwitch */
char *romfile;
/* bootIndex is only used for disk, network interface, hostdev

25
src/conf/domain_conf.c
View File

@@ -6095,9 +6095,17 @@ virDomainDeviceInfoFormat(virBufferPtr buf,
}
if ((flags & VIR_DOMAIN_DEF_FORMAT_ALLOW_ROM) &&
(info->rombar != VIR_TRISTATE_SWITCH_ABSENT || info->romfile)) {
(info->romenabled != VIR_TRISTATE_BOOL_ABSENT ||
info->rombar != VIR_TRISTATE_SWITCH_ABSENT ||
info->romfile)) {
virBufferAddLit(buf, "<rom");
if (info->romenabled != VIR_TRISTATE_BOOL_ABSENT) {
const char *romenabled = virTristateBoolTypeToString(info->romenabled);
if (romenabled)
virBufferAsprintf(buf, " enabled='%s'", romenabled);
}
if (info->rombar != VIR_TRISTATE_SWITCH_ABSENT) {
const char *rombar = virTristateSwitchTypeToString(info->rombar);
@@ -6738,6 +6746,7 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED,
xmlNodePtr boot = NULL;
xmlNodePtr rom = NULL;
char *type = NULL;
char *romenabled = NULL;
char *rombar = NULL;
char *aliasStr = NULL;
int ret = -1;
@@ -6791,6 +6800,12 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED,
}
if (rom) {
if ((romenabled = virXMLPropString(rom, "enabled")) &&
((info->romenabled = virTristateBoolTypeFromString(romenabled)) <= 0)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown rom enabled value '%s'"), romenabled);
goto cleanup;
}
if ((rombar = virXMLPropString(rom, "bar")) &&
((info->rombar = virTristateSwitchTypeFromString(rombar)) <= 0)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -6798,6 +6813,13 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED,
goto cleanup;
}
info->romfile = virXMLPropString(rom, "file");
if (info->romenabled == VIR_TRISTATE_BOOL_NO &&
(info->rombar != VIR_TRISTATE_SWITCH_ABSENT || info->romfile)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("ROM tuning is not supported when ROM is disabled"));
goto cleanup;
}
}
if (address &&
@@ -6811,6 +6833,7 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt ATTRIBUTE_UNUSED,
virDomainDeviceInfoClear(info);
VIR_FREE(type);
VIR_FREE(rombar);
VIR_FREE(romenabled);
VIR_FREE(aliasStr);
return ret;
}