diff options
Diffstat (limited to 'hw/ppc/spapr_pci.c')
| -rw-r--r-- | hw/ppc/spapr_pci.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index ccda4a1db7..bedb0471f8 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -280,7 +280,7 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPREnvironment *spapr, unsigned int req_num = rtas_ld(args, 4); /* 0 == remove all */ unsigned int seq_num = rtas_ld(args, 5); unsigned int ret_intr_type; - int ndev, irq; + int ndev, irq, max_irqs = 0; sPAPRPHBState *phb = NULL; PCIDevice *pdev = NULL; @@ -333,6 +333,23 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPREnvironment *spapr, } trace_spapr_pci_msi("Configuring MSI", ndev, config_addr); + /* Check if the device supports as many IRQs as requested */ + if (ret_intr_type == RTAS_TYPE_MSI) { + max_irqs = msi_nr_vectors_allocated(pdev); + } else if (ret_intr_type == RTAS_TYPE_MSIX) { + max_irqs = pdev->msix_entries_nr; + } + if (!max_irqs) { + error_report("Requested interrupt type %d is not enabled for device#%d", + ret_intr_type, ndev); + rtas_st(rets, 0, -1); /* Hardware error */ + return; + } + /* Correct the number if the guest asked for too many */ + if (req_num > max_irqs) { + req_num = max_irqs; + } + /* Check if there is an old config and MSI number has not changed */ if (phb->msi_table[ndev].nvec && (req_num != phb->msi_table[ndev].nvec)) { /* Unexpected behaviour */ @@ -343,21 +360,6 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPREnvironment *spapr, /* There is no cached config, allocate MSIs */ if (!phb->msi_table[ndev].nvec) { - int max_irqs = 0; - if (ret_intr_type == RTAS_TYPE_MSI) { - max_irqs = msi_nr_vectors_allocated(pdev); - } else if (ret_intr_type == RTAS_TYPE_MSIX) { - max_irqs = pdev->msix_entries_nr; - } - if (!max_irqs) { - error_report("Requested interrupt type %d is not enabled for device#%d", - ret_intr_type, ndev); - rtas_st(rets, 0, -1); /* Hardware error */ - return; - } - if (req_num > max_irqs) { - req_num = max_irqs; - } irq = spapr_allocate_irq_block(req_num, false, ret_intr_type == RTAS_TYPE_MSI); if (irq < 0) { |