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hw/acpi: Move acpi_set_pci_info to pcihp

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HW part of ACPI PCI hotplug in QEMU depends on ACPI_PCIHP_PROP_BSEL
being set on a PCI bus that supports ACPI hotplug. It should work
regardless of the source of ACPI tables (QEMU generator/legacy SeaBIOS/Xen).
So move ACPI_PCIHP_PROP_BSEL initialization into HW ACPI implementation
part from QEMU's ACPI table generator.

To do PCI passthrough with Xen, the property ACPI_PCIHP_PROP_BSEL needs
to be set, but this was done only when ACPI tables are built which is
not needed for a Xen guest. The need for the property starts with commit
"pc: pcihp: avoid adding ACPI_PCIHP_PROP_BSEL twice"
(f0c9d64a68).

Adding find_i440fx into stubs so that mips-softmmu target can be built.

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Anthony PERARD 2017-09-06 14:40:32 +01:00 committed by Michael S. Tsirkin
parent f5855994fe
commit ab938ae43f
4 changed files with 45 additions and 32 deletions
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38
hw/acpi/pcihp.c
View file

@ -75,6 +75,43 @@ static int acpi_pcihp_get_bsel(PCIBus *bus)
}
}
/* Assign BSEL property to all buses. In the future, this can be changed
* to only assign to buses that support hotplug.
*/
static void *acpi_set_bsel(PCIBus *bus, void *opaque)
{
unsigned *bsel_alloc = opaque;
unsigned *bus_bsel;
if (qbus_is_hotpluggable(BUS(bus))) {
bus_bsel = g_malloc(sizeof *bus_bsel);
*bus_bsel = (*bsel_alloc)++;
object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL,
bus_bsel, &error_abort);
}
return bsel_alloc;
}
static void acpi_set_pci_info(void)
{
static bool bsel_is_set;
PCIBus *bus;
unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT;
if (bsel_is_set) {
return;
}
bsel_is_set = true;
bus = find_i440fx(); /* TODO: Q35 support */
if (bus) {
/* Scan all PCI buses. Set property to enable acpi based hotplug. */
pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc);
}
}
static void acpi_pcihp_test_hotplug_bus(PCIBus *bus, void *opaque)
{
AcpiPciHpFind *find = opaque;
@ -177,6 +214,7 @@ static void acpi_pcihp_update(AcpiPciHpState *s)
void acpi_pcihp_reset(AcpiPciHpState *s)
{
acpi_set_pci_info();
acpi_pcihp_update(s);
}

32
hw/i386/acpi-build.c
View file

@ -493,36 +493,6 @@ build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms)
table_data->len - madt_start, 1, NULL, NULL);
}
/* Assign BSEL property to all buses. In the future, this can be changed
* to only assign to buses that support hotplug.
*/
static void *acpi_set_bsel(PCIBus *bus, void *opaque)
{
unsigned *bsel_alloc = opaque;
unsigned *bus_bsel;
if (qbus_is_hotpluggable(BUS(bus))) {
bus_bsel = g_malloc(sizeof *bus_bsel);
*bus_bsel = (*bsel_alloc)++;
object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL,
bus_bsel, &error_abort);
}
return bsel_alloc;
}
static void acpi_set_pci_info(void)
{
PCIBus *bus = find_i440fx(); /* TODO: Q35 support */
unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT;
if (bus) {
/* Scan all PCI buses. Set property to enable acpi based hotplug. */
pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc);
}
}
static void build_append_pcihp_notify_entry(Aml *method, int slot)
{
Aml *if_ctx;
@ -2888,8 +2858,6 @@ void acpi_setup(void)
build_state = g_malloc0(sizeof *build_state);
acpi_set_pci_info();
acpi_build_tables_init(&tables);
acpi_build(&tables, MACHINE(pcms));

1
stubs/Makefile.objs
View file

@ -40,3 +40,4 @@ stub-obj-y += pc_madt_cpu_entry.o
stub-obj-y += vmgenid.o
stub-obj-y += xen-common.o
stub-obj-y += xen-hvm.o
stub-obj-y += pci-host-piix.o

6
stubs/pci-host-piix.c Normal file
View file

@ -0,0 +1,6 @@
#include "qemu/osdep.h"
#include "hw/i386/pc.h"
PCIBus *find_i440fx(void)
{
return NULL;
}