diff options
| author | Bibo Mao <maobibo@loongson.cn> | 2025-06-06 14:30:30 +0800 |
|---|---|---|
| committer | Song Gao <gaosong@loongson.cn> | 2025-06-19 15:52:35 +0800 |
| commit | c642ddf19b248bb668e40a8d15089b877e4057fa (patch) | |
| tree | e6df9db7b9b7f819cb83ba8512fe515fb03d1c62 /hw/intc/loongarch_ipi_kvm.c | |
| parent | 0dd6798a1adda03dcfa6304437faa8e62a193d9c (diff) | |
| download | focaccia-qemu-c642ddf19b248bb668e40a8d15089b877e4057fa.tar.gz focaccia-qemu-c642ddf19b248bb668e40a8d15089b877e4057fa.zip | |
hw/loongarch/virt: Add reset support for kernel irqchip
When system reboot, interrupt controller is restored to initial state. However if interrupt controller extioi/ipi/pch_pic is emulated in kernel, it should notify kvm to do so. Here suspend and restore API is used for reset, set initial state in qemu user space and restore API is used to notify kvm to reload register state. Reviewed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Message-ID: <20250606063033.2557365-11-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
Diffstat (limited to 'hw/intc/loongarch_ipi_kvm.c')
| -rw-r--r-- | hw/intc/loongarch_ipi_kvm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/intc/loongarch_ipi_kvm.c b/hw/intc/loongarch_ipi_kvm.c index b615060d83..4cb3acc921 100644 --- a/hw/intc/loongarch_ipi_kvm.c +++ b/hw/intc/loongarch_ipi_kvm.c @@ -25,6 +25,10 @@ static void kvm_ipi_access_regs(void *opaque, bool write) uint64_t attr; int cpu, fd = lis->dev_fd; + if (fd == 0) { + return; + } + for (cpu = 0; cpu < ipi->num_cpu; cpu++) { core = &ipi->cpu[cpu]; attr = (cpu << 16) | CORE_STATUS_OFF; |