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platform: xuantie: Harden xuantie link pmu init #10

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Merged
cp0613 merged 1 commit into from
Jun 1, 2026
Merged

platform: xuantie: Harden xuantie link pmu init #10

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5 changes: 5 additions & 0 deletions platform/generic/include/xuantie/xuantie_link.h
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,11 @@
#define XUANTIE_LINK_PMU_HPCPINTPEND 0x5e8
#define XUANTIE_LINK_PMU_VENDOR_N_IMP_ID 0x600 // XL300

#define XUANTIE_LINK_PMU_NUM_COUNTERS 6
#define XUANTIE_LINK_PMU_CNT_BITMAP GENMASK_ULL(XUANTIE_LINK_PMU_NUM_COUNTERS - 1, 0)
#define XUANTIE_LINK_PMU_AUTHCR_AUTH BIT_ULL(40)
#define XUANTIE_LINK_PMU_AUTHCR_INTPEND BIT_ULL(32)

/* HPCP dev type */
#define XUANTIE_LINK_DEV_TYPE_XL100 100
#define XUANTIE_LINK_DEV_TYPE_XL200 200
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55 changes: 37 additions & 18 deletions platform/generic/xuantie/xuantie_link.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,29 +12,48 @@
int xuantie_link_pmu_device_init(void)
{
#if __riscv_xlen == 64
int nodeoffset, rc, dev_type;
uint64_t addr;
static const struct {
const char *compat;
int dev_type;
} pmu_match[] = {
{ "xuantie,xl100-pmu", XUANTIE_LINK_DEV_TYPE_XL100 },
{ "xuantie,xl200-pmu", XUANTIE_LINK_DEV_TYPE_XL200 },
{ "xuantie,xl300-pmu", XUANTIE_LINK_DEV_TYPE_XL300 },
};
void *fdt = fdt_get_address_rw();
bool found = false;
unsigned int i;

if ((nodeoffset = fdt_node_offset_by_compatible(fdt, -1, "xuantie,xl100-pmu")) > 0)
dev_type = XUANTIE_LINK_DEV_TYPE_XL100;
else if ((nodeoffset = fdt_node_offset_by_compatible(fdt, -1, "xuantie,xl200-pmu")) > 0)
dev_type = XUANTIE_LINK_DEV_TYPE_XL200;
else if ((nodeoffset = fdt_node_offset_by_compatible(fdt, -1, "xuantie,xl300-pmu")) > 0)
dev_type = XUANTIE_LINK_DEV_TYPE_XL300;
else
if (!fdt)
return SBI_ENODEV;

rc = fdt_get_node_addr_size(fdt, nodeoffset, 0, &addr, NULL);
if (rc)
return SBI_ENODEV;
for (i = 0; i < array_size(pmu_match); i++) {
int nodeoffset = -1;

while ((nodeoffset = fdt_node_offset_by_compatible(
fdt, nodeoffset, pmu_match[i].compat)) >= 0) {
uint64_t addr;

if (!fdt_node_is_enabled(fdt, nodeoffset))
continue;
if (fdt_get_node_addr_size(fdt, nodeoffset, 0, &addr, NULL))
continue;

if (dev_type == XUANTIE_LINK_DEV_TYPE_XL300)
writeq(BIT_ULL(40) | BIT_ULL(32) | 0x3f, (void *)addr + XUANTIE_LINK_PMU_HPCPHAUTHCR);
writeq(0x3f, (void *)addr + XUANTIE_LINK_PMU_HPCPMAUTHCR);
writeq(0x3f, (void *)addr + XUANTIE_LINK_PMU_HPCPSAUTHCR);
writeq(0x1, (void *)addr + XUANTIE_LINK_PMU_L3MAUTHCR);
writeq(0x0, (void *)addr + XUANTIE_LINK_PMU_HPCPINHIBIT);
if (pmu_match[i].dev_type == XUANTIE_LINK_DEV_TYPE_XL300)
writeq(XUANTIE_LINK_PMU_AUTHCR_AUTH |
XUANTIE_LINK_PMU_AUTHCR_INTPEND |
XUANTIE_LINK_PMU_CNT_BITMAP,
(void *)addr + XUANTIE_LINK_PMU_HPCPHAUTHCR);
writeq(XUANTIE_LINK_PMU_CNT_BITMAP, (void *)addr + XUANTIE_LINK_PMU_HPCPMAUTHCR);
writeq(XUANTIE_LINK_PMU_CNT_BITMAP, (void *)addr + XUANTIE_LINK_PMU_HPCPSAUTHCR);
writeq(0x1, (void *)addr + XUANTIE_LINK_PMU_L3MAUTHCR);
writeq(XUANTIE_LINK_PMU_CNT_BITMAP, (void *)addr + XUANTIE_LINK_PMU_HPCPINHIBIT);
found = true;
}
}

if (!found)
return SBI_ENODEV;
#endif
return SBI_OK;
}
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