Hi: Please disregard this patch. This patch has issues and schema was not updated. I have sent an updated patch set with subject: pm/i386: add support for two options that controls acpi hotplug on q35/i440fx Not sure if I was able to send the patch series correctly (I wanted to add a cover letter but somehow it went out without one). If required I can send it again. The new patch series has the issues fixed, unit tests added and they all pass fine. Requesting for a review and feedback. Thanks ani On Mon, 16 Aug 2021, Ani Sinha wrote:

'acpi-pci-hotplug-with-bridge-support' and 'acpi-root-pci-hotplug' are two pm options in qemu that governs acpi hotplug support. This is a WIP patch that tries to implement support for both these two global qemu options. 'acpi-pci-hotplug-with-bridge-support' applies both for q35 as well as i440fx platforms. The 'acpi-root-pci-hotplug' only applies for i440fx.

'acpi-pci-hotplug-with-bridge-support' can be turned off by providing the following xml snippet:

<pm> <acpi-hotplug-bridge enabled='no'> </pm>

Similarly, 'acpi-root-pci-hotplug' can be turned off by providing the following xml snippet:

<pm> <acpi-root-hotplug enabled='no'> </pm>

This change adds no unit tests. It will be added later on. It it sent for initial comments and suggestions.

Signed-off-by: Ani Sinha <ani@anisinha.ca> --- src/conf/domain_conf.c | 10 ++++++++++ src/conf/domain_conf.h | 2 ++ src/qemu/qemu_capabilities.c | 9 +++++++++ src/qemu/qemu_capabilities.h | 5 +++++ src/qemu/qemu_command.c | 28 ++++++++++++++++++++++++++++ src/qemu/qemu_validate.c | 21 +++++++++++++++++++++ 6 files changed, 75 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 06c1fcf5e5..512973e6f4 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -19351,6 +19351,16 @@ virDomainDefLifecycleParse(virDomainDef *def, &def->pm.s4) < 0) goto error;

+ if (virDomainPMStateParseXML(ctxt, + "string(./pm/acpi-hotplug-bridge/@enabled)", + &def->pm.acpi_hp_bridge) < 0) + goto error; + + if (virDomainPMStateParseXML(ctxt, + "string(./pm/acpi-root-hotplug/@enabled)", + &def->pm.acpi_root_hp) < 0) + goto error; + return 0;

error: diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index ca21082624..94283cbb04 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2643,6 +2643,8 @@ struct _virDomainPowerManagement { /* These options are of type enum virTristateBool */ int s3; int s4; + int acpi_hp_bridge; + int acpi_root_hp; };

struct _virDomainPerfDef { diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 9558938866..8dad4a6351 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -637,6 +637,11 @@ VIR_ENUM_IMPL(virQEMUCaps, "confidential-guest-support", "query-display-options", "s390-pv-guest", + "piix4-acpi-hotplug-bridge", + "piix4-acpi-root-hotplug-en", + + /* 410 */ + "ich9-acpi-hotplug-bridge", );

@@ -1467,6 +1472,9 @@ static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsIDEDrive[] = { static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsPiix4PM[] = { { "disable_s3", QEMU_CAPS_PIIX_DISABLE_S3, NULL }, { "disable_s4", QEMU_CAPS_PIIX_DISABLE_S4, NULL }, + { "acpi-pci-hotplug-with-bridge-support", QEMU_CAPS_PIIX_ACPI_HOTPLUG_BRIDGE, NULL }, + { "acpi-root-pci-hotplug", QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG, NULL }, + };

static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsUSBRedir[] = { @@ -1519,6 +1527,7 @@ static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsVirtioGpu[] = { static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsICH9[] = { { "disable_s3", QEMU_CAPS_ICH9_DISABLE_S3, NULL }, { "disable_s4", QEMU_CAPS_ICH9_DISABLE_S4, NULL }, + { "acpi-pci-hotplug-with-bridge-support", QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE, NULL }, };

static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsUSBNECXHCI[] = { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 2b1bb57a49..e988527f39 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -617,6 +617,11 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_MACHINE_CONFIDENTAL_GUEST_SUPPORT, /* -machine confidential-guest-support */ QEMU_CAPS_QUERY_DISPLAY_OPTIONS, /* 'query-display-options' qmp command present */ QEMU_CAPS_S390_PV_GUEST, /* -object s390-pv-guest,... */ + QEMU_CAPS_PIIX_ACPI_HOTPLUG_BRIDGE, /* -M pc PIIX4_PM.acpi-pci-hotplug-with-bridge-support */ + QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG, /* -M pc PIIX4_PM.acpi-root-pci-hotplug */ + + /* 410 */ + QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE, /* -M q35 PIIX4_PM.acpi-pci-hotplug-with-bridge-support */

QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 156af4caee..5a7a23d5b9 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6171,6 +6171,34 @@ qemuBuildPMCommandLine(virCommand *cmd, pm_object, def->pm.s4 == VIR_TRISTATE_BOOL_NO); }

+ if (def->pm.acpi_hp_bridge) { + const char *pm_object = "PIIX4_PM"; + const char *switch_str = "on"; + + if (def->pm.acpi_hp_bridge == VIR_TRISTATE_BOOL_NO) + switch_str = "off"; + + if (qemuDomainIsQ35(def) && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE)) + pm_object = "ICH9-LPC"; + + virCommandAddArg(cmd, "-global"); + virCommandAddArgFormat(cmd, "%s.acpi-pci-hotplug-with-bridge-support=%s", + pm_object, switch_str); + } + + if (def->pm.acpi_root_hp) { + const char *pm_object = "PIIX4_PM"; + const char *switch_str = "on"; + + if (def->pm.acpi_hp_bridge == VIR_TRISTATE_BOOL_NO) + switch_str = "off"; + + virCommandAddArg(cmd, "-global"); + virCommandAddArgFormat(cmd, "%s.acpi-root-pci-hotplug=%s", + pm_object, switch_str); + } + return 0; }

diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index a964c8593d..22403e6d01 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -560,6 +560,27 @@ qemuValidateDomainDefPM(const virDomainDef *def, } }

+ if (def->pm.acpi_hp_bridge) { + bool q35ICH9_pcihpbr = q35Dom && + virQEMUCapsGet(qemuCaps, + QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE); + + if (!q35ICH9_pcihpbr && !virQEMUCapsGet(qemuCaps, + QEMU_CAPS_PIIX_ACPI_HOTPLUG_BRIDGE)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + "%s", _("setting ACPI hotplug bridge not supported")); + return -1; + } + } + + if (def->pm.acpi_root_hp) { + if (!q35Dom && !virQEMUCapsGet(qemuCaps, QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + "%s", _("setting ACPI root pci hotplug not supported")); + return -1; + } + } + return 0; }

-- 2.25.1