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[Qemu-devel] [PATCH] hw/pci: add pci capability to pci-pci bridge
From: |
Jing Liu |
Subject: |
[Qemu-devel] [PATCH] hw/pci: add pci capability to pci-pci bridge |
Date: |
Tue, 7 Aug 2018 15:04:09 +0800 |
Add hint to firmware (e.g. SeaBIOS) to reserve addtional
IO/MEM/PREF spaces for legacy pci-pci bridge, to enable
some pci devices hotplugging whose IO/MEM/PREF spaces
requests are larger than the ones in pci-pci bridge set
by firmware.
Signed-off-by: Jing Liu <address@hidden>
---
hw/pci-bridge/pci_bridge_dev.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c
index b2d861d..8e9afbd 100644
--- a/hw/pci-bridge/pci_bridge_dev.c
+++ b/hw/pci-bridge/pci_bridge_dev.c
@@ -46,6 +46,12 @@ struct PCIBridgeDev {
uint32_t flags;
OnOffAuto msi;
+
+ /* additional resources to reserve on firmware init */
+ uint64_t io_reserve;
+ uint64_t mem_reserve;
+ uint64_t pref32_reserve;
+ uint64_t pref64_reserve;
};
typedef struct PCIBridgeDev PCIBridgeDev;
@@ -95,6 +101,13 @@ static void pci_bridge_dev_realize(PCIDevice *dev, Error
**errp)
error_free(local_err);
}
+ err = pci_bridge_qemu_reserve_cap_init(dev, 0, 0,
+ bridge_dev->io_reserve, bridge_dev->mem_reserve,
+ bridge_dev->pref32_reserve, bridge_dev->pref64_reserve, errp);
+ if (err) {
+ goto cap_error;
+ }
+
if (shpc_present(dev)) {
/* TODO: spec recommends using 64 bit prefetcheable BAR.
* Check whether that works well. */
@@ -103,6 +116,8 @@ static void pci_bridge_dev_realize(PCIDevice *dev, Error
**errp)
}
return;
+cap_error:
+ msi_uninit(dev);
msi_error:
slotid_cap_cleanup(dev);
slotid_error:
@@ -162,6 +177,11 @@ static Property pci_bridge_dev_properties[] = {
ON_OFF_AUTO_AUTO),
DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags,
PCI_BRIDGE_DEV_F_SHPC_REQ, true),
+ DEFINE_PROP_SIZE("io-reserve", PCIBridgeDev, io_reserve, -1),
+ DEFINE_PROP_SIZE("mem-reserve", PCIBridgeDev, mem_reserve, -1),
+ DEFINE_PROP_SIZE("pref32-reserve", PCIBridgeDev, pref32_reserve, -1),
+ DEFINE_PROP_SIZE("pref64-reserve", PCIBridgeDev, pref64_reserve, -1),
+
DEFINE_PROP_END_OF_LIST(),
};
--
1.8.3.1
- [Qemu-devel] [PATCH] hw/pci: add pci capability to pci-pci bridge,
Jing Liu <=
Re: [Qemu-devel] [PATCH] hw/pci: add pci capability to pci-pci bridge, Marcel Apfelbaum, 2018/08/11
Re: [Qemu-devel] [PATCH] hw/pci: add pci capability to pci-pci bridge, Liu, Jing2, 2018/08/14