diff options
Diffstat (limited to 'hw/riscv/sifive_plic.c')
| -rw-r--r-- | hw/riscv/sifive_plic.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/hw/riscv/sifive_plic.c b/hw/riscv/sifive_plic.c index d12ec3fc9a..1c703e1a37 100644 --- a/hw/riscv/sifive_plic.c +++ b/hw/riscv/sifive_plic.c @@ -23,6 +23,7 @@ #include "qemu/error-report.h" #include "hw/sysbus.h" #include "target/riscv/cpu.h" +#include "sysemu/sysemu.h" #include "hw/riscv/sifive_plic.h" #define RISCV_DEBUG_PLIC 0 @@ -383,7 +384,7 @@ static void parse_hart_config(SiFivePLICState *plic) p = plic->hart_config; while ((c = *p++)) { if (c == ',') { - addrid += __builtin_popcount(modes); + addrid += ctpop8(modes); modes = 0; hartid++; } else { @@ -397,7 +398,7 @@ static void parse_hart_config(SiFivePLICState *plic) } } if (modes) { - addrid += __builtin_popcount(modes); + addrid += ctpop8(modes); } hartid++; @@ -431,6 +432,7 @@ static void sifive_plic_irq_request(void *opaque, int irq, int level) static void sifive_plic_realize(DeviceState *dev, Error **errp) { SiFivePLICState *plic = SIFIVE_PLIC(dev); + int i; memory_region_init_io(&plic->mmio, OBJECT(dev), &sifive_plic_ops, plic, TYPE_SIFIVE_PLIC, plic->aperture_size); @@ -443,6 +445,19 @@ static void sifive_plic_realize(DeviceState *dev, Error **errp) plic->enable = g_new0(uint32_t, plic->bitfield_words * plic->num_addrs); sysbus_init_mmio(SYS_BUS_DEVICE(dev), &plic->mmio); qdev_init_gpio_in(dev, sifive_plic_irq_request, plic->num_sources); + + /* We can't allow the supervisor to control SEIP as this would allow the + * supervisor to clear a pending external interrupt which will result in + * lost a interrupt in the case a PLIC is attached. The SEIP bit must be + * hardware controlled when a PLIC is attached. + */ + for (i = 0; i < smp_cpus; i++) { + RISCVCPU *cpu = RISCV_CPU(qemu_get_cpu(i)); + if (riscv_cpu_claim_interrupts(cpu, MIP_SEIP) < 0) { + error_report("SEIP already claimed"); + exit(1); + } + } } static void sifive_plic_class_init(ObjectClass *klass, void *data) |