diff options
| author | Alistair Francis <alistair.francis@wdc.com> | 2022-06-01 11:36:31 +1000 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2022-06-10 09:31:42 +1000 |
| commit | 40244040a7ac00d40db4dea02234d13502c30112 (patch) | |
| tree | dcda9e053d79419cb0cf24b7bb53ef545e464a56 | |
| parent | f9a461b2d3b8ef4f36b7891eb4040693ee071719 (diff) | |
hw/intc: sifive_plic: Avoid overflowing the addr_config buffer
Since commit ad40be27 "target/riscv: Support start kernel directly by
KVM" we have been overflowing the addr_config on "M,MS..."
configurations, as reported https://gitlab.com/qemu-project/qemu/-/issues/1050.
This commit changes the loop in sifive_plic_create() from iterating over
the number of harts to just iterating over the addr_config. The
addr_config is based on the hart_config, and will contain interrup details
for all harts. This way we can't iterate past the end of addr_config.
Fixes: ad40be27084536 ("target/riscv: Support start kernel directly by KVM")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1050
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Mingwang Li <limingwang@huawei.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220601013631.196854-1-alistair.francis@opensource.wdc.com>
| -rw-r--r-- | hw/intc/sifive_plic.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c index eebbcf33d4..56d60e9ac9 100644 --- a/hw/intc/sifive_plic.c +++ b/hw/intc/sifive_plic.c @@ -431,7 +431,7 @@ DeviceState *sifive_plic_create(hwaddr addr, char *hart_config, uint32_t context_stride, uint32_t aperture_size) { DeviceState *dev = qdev_new(TYPE_SIFIVE_PLIC); - int i, j = 0; + int i; SiFivePLICState *plic; assert(enable_stride == (enable_stride & -enable_stride)); @@ -451,18 +451,17 @@ DeviceState *sifive_plic_create(hwaddr addr, char *hart_config, sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr); plic = SIFIVE_PLIC(dev); - for (i = 0; i < num_harts; i++) { - CPUState *cpu = qemu_get_cpu(hartid_base + i); - if (plic->addr_config[j].mode == PLICMode_M) { - j++; - qdev_connect_gpio_out(dev, num_harts + i, + for (i = 0; i < plic->num_addrs; i++) { + int cpu_num = plic->addr_config[i].hartid; + CPUState *cpu = qemu_get_cpu(hartid_base + cpu_num); + + if (plic->addr_config[i].mode == PLICMode_M) { + qdev_connect_gpio_out(dev, num_harts + cpu_num, qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT)); } - - if (plic->addr_config[j].mode == PLICMode_S) { - j++; - qdev_connect_gpio_out(dev, i, + if (plic->addr_config[i].mode == PLICMode_S) { + qdev_connect_gpio_out(dev, cpu_num, qdev_get_gpio_in(DEVICE(cpu), IRQ_S_EXT)); } } |