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[PATCH v6 2/8] fw_cfg: Write the extra roots into the fw_cfg
From: |
Yubo Miao |
Subject: |
[PATCH v6 2/8] fw_cfg: Write the extra roots into the fw_cfg |
Date: |
Wed, 8 Apr 2020 20:58:10 +0800 |
From: miaoyubo <address@hidden>
Write the extra roots into the fw_cfg therefore the uefi could
get the extra roots. Only if the uefi know there are extra roots,
the config space of devices behind the root could be obtained.
Signed-off-by: miaoyubo <address@hidden>
---
hw/arm/virt.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 7dc96abf72..0fdfe4129c 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -77,6 +77,7 @@
#include "hw/acpi/generic_event_device.h"
#include "hw/virtio/virtio-iommu.h"
#include "hw/char/pl011.h"
+#include "hw/pci/pci_bus.h"
#define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
@@ -1435,6 +1436,12 @@ void virt_machine_done(Notifier *notifier, void *data)
ARMCPU *cpu = ARM_CPU(first_cpu);
struct arm_boot_info *info = &vms->bootinfo;
AddressSpace *as = arm_boot_address_space(cpu, info);
+ PCIHostState *s = OBJECT_CHECK(PCIHostState,
+ object_resolve_path_type("",
+ "pcie-host-bridge", NULL),
+ TYPE_PCI_HOST_BRIDGE);
+
+ PCIBus *bus = s->bus;
/*
* If the user provided a dtb, we assume the dynamic sysbus nodes
@@ -1453,6 +1460,22 @@ void virt_machine_done(Notifier *notifier, void *data)
exit(1);
}
+ if (bus) {
+ int extra_hosts = 0;
+ QLIST_FOREACH(bus, &bus->child, sibling) {
+ /* look for expander root buses */
+ if (pci_bus_is_root(bus)) {
+ extra_hosts++;
+ }
+ }
+ if (extra_hosts && vms->fw_cfg) {
+ uint64_t *val = g_malloc(sizeof(*val));
+ *val = cpu_to_le64(extra_hosts);
+ fw_cfg_add_file(vms->fw_cfg,
+ "etc/extra-pci-roots", val, sizeof(*val));
+ }
+ }
+
virt_acpi_setup(vms);
virt_build_smbios(vms);
}
--
2.19.1
- [PATCH v6 0/8] pci_expander_brdige:acpi:Support pxb-pcie for ARM, Yubo Miao, 2020/04/08
- [PATCH v6 2/8] fw_cfg: Write the extra roots into the fw_cfg,
Yubo Miao <=
- [PATCH v6 8/8] unit-test: Add the binary file and clear diff.h, Yubo Miao, 2020/04/08
- [PATCH v6 4/8] acpi: Refactor the source of host bridge and build tables for pxb, Yubo Miao, 2020/04/08
- [PATCH v6 5/8] acpi: Align the size to 128k, Yubo Miao, 2020/04/08
- [PATCH v6 1/8] acpi: Extract two APIs from acpi_dsdt_add_pci, Yubo Miao, 2020/04/08
- [PATCH v6 6/8] unit-test: The files changed., Yubo Miao, 2020/04/08
- [PATCH v6 7/8] unit-test: Add testcase for pxb, Yubo Miao, 2020/04/08
- [PATCH v6 3/8] acpi: Extract crs build form acpi_build.c, Yubo Miao, 2020/04/08
- Re: [PATCH v6 0/8] pci_expander_brdige:acpi:Support pxb-pcie for ARM, no-reply, 2020/04/08