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.bobr...@au1.ibm.com>
---
v2:
* ppc_radix_page_info now kept in native format, conversion to BE done when
adding to the device tree.
* radix_page_info moved into the CPU class, cleaning up some code.
hw/ppc/spapr.c | 12 ++++++++++++
include/sysemu/kvm.h | 1 +
target/ppc/cpu-qom.h | 1 +
target/ppc/cpu.h | 4 ++++
target/ppc/kvm.c | 27 +++++++++++++++++++++++++++
5 files changed, 45 insertions(+)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index cceb35f083..ca3812555f 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -409,6 +409,8 @@ 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) {
@@ -494,6 +496,16 @@ 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)
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 3045ee7678..01a8db1180 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -526,5 +526,6 @@ int kvm_set_one_reg(CPUState *cs, uint64_t id, void
*source);
* Returns: 0 on success, or a negative errno on failure.
*/
int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);
+struct ppc_radix_page_info *kvm_get_radix_page_info(void);
int kvm_get_max_memslots(void);
#endif
diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
index 4807f4d86c..0efb543912 100644
--- a/target/ppc/cpu-qom.h
+++ b/target/ppc/cpu-qom.h
@@ -195,6 +195,7 @@ typedef struct PowerPCCPUClass {
int bfd_mach;
uint32_t l1_dcache_size, l1_icache_size;
const struct ppc_segment_page_sizes *sps;
+ struct ppc_radix_page_info *radix_page_info;
void (*init_proc)(CPUPPCState *env);
int (*check_pow)(CPUPPCState *env);
int (*handle_mmu_fault)(PowerPCCPU *cpu, vaddr eaddr, int rwx, int
mmu_idx);
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index b559b67073..a6c8c5ff4c 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -934,6 +934,10 @@ struct ppc_segment_page_sizes {
struct ppc_one_seg_page_size sps[PPC_PAGE_SIZES_MAX_SZ];
};
+struct ppc_radix_page_info {
+ uint32_t count;
+ uint32_t entries[PPC_PAGE_SIZES_MAX_SZ];
+};
/*****************************************************************************/
/* The whole PowerPC CPU context */
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index d53ede8b4a..cf62a42c1f 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -48,6 +48,7 @@
#if defined(TARGET_PPC64)
#include "hw/ppc/spapr_cpu_core.h"
#endif
+#include "sysemu/kvm_int.h"
//#define DEBUG_KVM
@@ -329,6 +330,30 @@ static void kvm_get_smmu_info(PowerPCCPU *cpu, struct
kvm_ppc_smmu_info *info)
kvm_get_fallback_smmu_info(cpu, info);
}
+struct ppc_radix_page_info *kvm_get_radix_page_info(void)
+{
+ KVMState *s = KVM_STATE(current_machine->accelerator);
+ struct ppc_radix_page_info *radix_page_info;
+ struct kvm_ppc_rmmu_info rmmu_info;
+ int i;
+
+ if (!kvm_check_extension(s, KVM_CAP_PPC_MMU_RADIX)) {
+ return NULL;
+ }
+ if (kvm_vm_ioctl(s, KVM_PPC_GET_RMMU_INFO, &rmmu_info)) {
+ return NULL;
+ }
+ radix_page_info = g_malloc0(sizeof(*radix_page_info));
+ radix_page_info->count = 0;
+ for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
+ if (rmmu_info.ap_encodings[i]) {
+ radix_page_info->entries[i] = rmmu_info.ap_encodings[i];
+ radix_page_info->count++;
+ }
+ }
+ return radix_page_info;
+}
+
static long gethugepagesize(const char *mem_path)
{
struct statfs fs;
@@ -2379,6 +2404,8 @@ static void kvmppc_host_cpu_class_init(ObjectClass *oc,
void *data)
pcc->l1_icache_size = icache_size;
}
+ pcc->radix_page_info = kvm_enabled() ? kvm_get_radix_page_info() : NULL;
+
/* Reason: kvmppc_host_cpu_initfn() dies when !kvm_enabled() */
dc->cannot_destroy_with_object_finalize_yet = true;
}
--
2.11.0
