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pseries: Support PCI extended config space in RTAS calls

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On the pseries machine (which expexts a paravirtualized guest), guest
access to PCI config space is via host-provided RTAS functions.  This
patch extends these RTAS functions to permit access to PCI extended
config space, as specified in PAPR.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Benjamin Herrenschmidt 2012-01-11 19:46:25 +00:00 committed by Alexander Graf
parent 964455f39e
commit 3f7565c957
1 changed files with 10 additions and 4 deletions
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14
hw/spapr_pci.c
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@ -62,6 +62,11 @@ static PCIDevice *find_dev(sPAPREnvironment *spapr,
return NULL;
}
static uint32_t rtas_pci_cfgaddr(uint32_t arg)
{
return ((arg >> 20) & 0xf00) | (arg & 0xff);
}
static void rtas_ibm_read_pci_config(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
@ -76,7 +81,7 @@ static void rtas_ibm_read_pci_config(sPAPREnvironment *spapr,
return;
}
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0) & 0xFF;
addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
val = pci_default_read_config(dev, addr, size);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, val);
@ -95,7 +100,7 @@ static void rtas_read_pci_config(sPAPREnvironment *spapr,
return;
}
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0) & 0xFF;
addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
val = pci_default_read_config(dev, addr, size);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, val);
@ -116,7 +121,7 @@ static void rtas_ibm_write_pci_config(sPAPREnvironment *spapr,
}
val = rtas_ld(args, 4);
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0) & 0xFF;
addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
pci_default_write_config(dev, addr, val, size);
rtas_st(rets, 0, 0);
}
@ -135,7 +140,7 @@ static void rtas_write_pci_config(sPAPREnvironment *spapr,
}
val = rtas_ld(args, 2);
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0) & 0xFF;
addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
pci_default_write_config(dev, addr, val, size);
rtas_st(rets, 0, 0);
}
@ -394,6 +399,7 @@ int spapr_populate_pci_devices(sPAPRPHBState *phb,
_FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
_FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
&interrupt_map_mask, sizeof(interrupt_map_mask)));
_FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
/* Populate PCI devices and allocate IRQs */
devices = 0;