diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/npu.c | 44 |
1 files changed, 43 insertions, 1 deletions
@@ -954,6 +954,7 @@ static int64_t npu_set_pe(struct phb *phb, return OPAL_PARAMETER; link_idx = dev->index; + dev->pe_num = pe_num; /* Separate links will be mapped to different PEs */ if (bcompare != OpalPciBusAll || @@ -1020,6 +1021,47 @@ static int64_t npu_freeze_status(struct phb *phb, return OPAL_SUCCESS; } +/* Sets the NPU to trigger an error when a DMA occurs */ +static int64_t npu_err_inject(struct phb *phb, uint32_t pe_num, + uint32_t type, uint32_t func __unused, + uint64_t addr __unused, uint64_t mask __unused) +{ + struct npu *p = phb_to_npu(phb); + struct npu_dev *dev = NULL; + int i; + + if (pe_num > NPU_NUM_OF_PES) { + prlog(PR_ERR, "NPU: error injection failed, bad PE given\n"); + return OPAL_PARAMETER; + } + + for (i = 0; i < p->total_devices; i++) { + if (p->devices[i].pe_num == pe_num) { + dev = &p->devices[i]; + break; + } + } + + if (!dev) { + prlog(PR_ERR, "NPU: couldn't find device with PE %x\n", pe_num); + return OPAL_PARAMETER; + } + + /* TODO: extend this to conform to OPAL injection standards */ + if (type > 1) { + prlog(PR_ERR, "NPU: invalid error injection type\n"); + return OPAL_PARAMETER; + } else if (type == 1) { + /* Emulate fence mode. */ + p->fenced = true; + } else { + /* Cause a freeze with an invalid MMIO write. */ + in_be64((void *)dev->bar.base); + } + + return OPAL_SUCCESS; +} + static const struct phb_ops npu_ops = { .lock = npu_lock, .unlock = npu_unlock, @@ -1059,7 +1101,7 @@ static const struct phb_ops npu_ops = { .eeh_freeze_clear = NULL, .eeh_freeze_set = NULL, .next_error = NULL, - .err_inject = NULL, + .err_inject = npu_err_inject, .get_diag_data = NULL, .get_diag_data2 = NULL, .set_capi_mode = NULL, |
