diff options
| -rw-r--r-- | hw/phb3.c | 24 |
1 files changed, 19 insertions, 5 deletions
@@ -1120,7 +1120,7 @@ static int64_t phb3_map_pe_dma_window_real(struct phb *phb, return OPAL_SUCCESS; } -static void phb3_pci_msi_check_q(struct phb3 *p, uint32_t ive_num) +static bool phb3_pci_msi_check_q(struct phb3 *p, uint32_t ive_num) { uint64_t ive, ivc, ffi, state; uint8_t *q_byte; @@ -1142,7 +1142,7 @@ static void phb3_pci_msi_check_q(struct phb3 *p, uint32_t ive_num) /* Q still not set, bail out */ if (!(*q_byte & 0x1)) - return; + return false; } /* Lock FFI and send interrupt */ @@ -1151,7 +1151,7 @@ static void phb3_pci_msi_check_q(struct phb3 *p, uint32_t ive_num) if (!state) break; if (state == ~0ULL) /* PHB Fenced */ - return; + return false; } /* Clear Q bit and update IVC */ @@ -1167,6 +1167,16 @@ static void phb3_pci_msi_check_q(struct phb3 *p, uint32_t ive_num) */ ffi = SETFIELD(PHB_FFI_REQUEST_ISN, 0ul, ive_num) | PHB_FFI_LOCK_CLEAR; out_be64(p->regs + PHB_FFI_REQUEST, ffi); + + return true; +} + +static void phb3_pci_msi_flush_ive(struct phb3 *p, uint32_t ive_num) +{ + asm volatile("dcbf %0,%1" + : + : "b" (p->tbl_ivt), "r" (ive_num * IVT_TABLE_STRIDE * 8) + : "memory"); } static int64_t phb3_pci_msi_eoi(struct phb *phb, @@ -1202,6 +1212,8 @@ static int64_t phb3_pci_msi_eoi(struct phb *phb, /* Handle Q bit */ phb3_pci_msi_check_q(p, ive_num); + phb3_pci_msi_flush_ive(p, ive_num); + return OPAL_SUCCESS; } @@ -1712,8 +1724,10 @@ static int64_t phb3_msi_set_xive(void *data, * The OS should make sure the interrupt handler has * been installed already. */ - if (prio != 0xff) - phb3_pci_msi_check_q(p, ive_num); + if (prio != 0xff) { + if (phb3_pci_msi_check_q(p, ive_num)) + phb3_pci_msi_flush_ive(p, ive_num); + } return OPAL_SUCCESS; } |