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spapr: Add ibm,processor-radix-AP-encodings to the device tree

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Use the new ioctl, KVM_PPC_GET_RMMU_INFO, to fetch radix MMU
information from KVM and present the page encodings in the device tree
under ibm,processor-radix-AP-encodings. This provides page size
information to the guest which is necessary for it to use radix mode.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
[dwg: Compile fix for 32-bit targets, style nit fix]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Sam Bobroff 2017-03-20 10:46:43 +11:00 • committed by David Gibson
parent d6ee2a7c85
commit c64abd1f9c
5 changed files with 48 additions and 0 deletions
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13
hw/ppc/spapr.c
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@ -459,6 +459,8 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset,
sPAPRDRConnector *drc;
sPAPRDRConnectorClass *drck;
int drc_index;
uint32_t radix_AP_encodings[PPC_PAGE_SIZES_MAX_SZ];
int i;
drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_CPU, index);
if (drc) {
@ -544,6 +546,17 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset,
_FDT(spapr_fixup_cpu_numa_dt(fdt, offset, cs));
_FDT(spapr_fixup_cpu_smt_dt(fdt, offset, cpu, compat_smt));
if (pcc->radix_page_info) {
for (i = 0; i < pcc->radix_page_info->count; i++) {
radix_AP_encodings[i] =
cpu_to_be32(pcc->radix_page_info->entries[i]);
}
_FDT((fdt_setprop(fdt, offset, "ibm,processor-radix-AP-encodings",
radix_AP_encodings,
pcc->radix_page_info->count *
sizeof(radix_AP_encodings[0]))));
}
}
static void spapr_populate_cpus_dt_node(void *fdt, sPAPRMachineState *spapr)