diff options
Diffstat (limited to 'hw/isa/lpc_ich9.c')
| -rw-r--r-- | hw/isa/lpc_ich9.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c index 04e5323140..087a18d04d 100644 --- a/hw/isa/lpc_ich9.c +++ b/hw/isa/lpc_ich9.c @@ -29,6 +29,7 @@ */ #include "qemu/osdep.h" +#include "qemu/log.h" #include "cpu.h" #include "qapi/visitor.h" #include "qemu/range.h" @@ -312,10 +313,12 @@ void ich9_generate_smi(void) cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI); } +/* Returns -1 on error, IRQ number on success */ static int ich9_lpc_sci_irq(ICH9LPCState *lpc) { - switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] & - ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK) { + uint8_t sel = lpc->d.config[ICH9_LPC_ACPI_CTRL] & + ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK; + switch (sel) { case ICH9_LPC_ACPI_CTRL_9: return 9; case ICH9_LPC_ACPI_CTRL_10: @@ -328,6 +331,8 @@ static int ich9_lpc_sci_irq(ICH9LPCState *lpc) return 21; default: /* reserved */ + qemu_log_mask(LOG_GUEST_ERROR, + "ICH9 LPC: SCI IRQ SEL #%u is reserved\n", sel); break; } return -1; @@ -459,7 +464,7 @@ ich9_lpc_pmbase_sci_update(ICH9LPCState *lpc) { uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE); uint8_t acpi_cntl = pci_get_long(lpc->d.config + ICH9_LPC_ACPI_CTRL); - uint8_t new_gsi; + int new_gsi; if (acpi_cntl & ICH9_LPC_ACPI_CTRL_ACPI_EN) { pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK; @@ -470,6 +475,9 @@ ich9_lpc_pmbase_sci_update(ICH9LPCState *lpc) ich9_pm_iospace_update(&lpc->pm, pm_io_base); new_gsi = ich9_lpc_sci_irq(lpc); + if (new_gsi == -1) { + return; + } if (lpc->sci_level && new_gsi != lpc->sci_gsi) { qemu_set_irq(lpc->pm.irq, 0); lpc->sci_gsi = new_gsi; |