diff options
author | Anup Patel <apatel@ventanamicro.com> | 2023-06-15 13:03:51 +0530 |
---|---|---|
committer | Anup Patel <anup@brainfault.org> | 2023-06-18 21:24:50 +0530 |
commit | 289a007b98b06d9ce4be24e2dda43f6821687e70 (patch) | |
tree | 9a5046e162f830067e3fe474e34664d5fada3a66 /arch/riscv/kvm/aia_aplic.c | |
parent | 74967aa208e257d0c26a7dd7dd93a8902b2203e4 (diff) |
RISC-V: KVM: Expose APLIC registers as attributes of AIA irqchip
We expose APLIC registers as KVM device attributes of the in-kernel
AIA irqchip device. This will allow KVM user-space to save/restore
APLIC state using KVM device ioctls().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/kvm/aia_aplic.c')
-rw-r--r-- | arch/riscv/kvm/aia_aplic.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/riscv/kvm/aia_aplic.c b/arch/riscv/kvm/aia_aplic.c index eecd8f4abe21..39e72aa016a4 100644 --- a/arch/riscv/kvm/aia_aplic.c +++ b/arch/riscv/kvm/aia_aplic.c @@ -501,6 +501,49 @@ static struct kvm_io_device_ops aplic_iodoev_ops = { .write = aplic_mmio_write, }; +int kvm_riscv_aia_aplic_set_attr(struct kvm *kvm, unsigned long type, u32 v) +{ + int rc; + + if (!kvm->arch.aia.aplic_state) + return -ENODEV; + + rc = aplic_mmio_write_offset(kvm, type, v); + if (rc) + return rc; + + return 0; +} + +int kvm_riscv_aia_aplic_get_attr(struct kvm *kvm, unsigned long type, u32 *v) +{ + int rc; + + if (!kvm->arch.aia.aplic_state) + return -ENODEV; + + rc = aplic_mmio_read_offset(kvm, type, v); + if (rc) + return rc; + + return 0; +} + +int kvm_riscv_aia_aplic_has_attr(struct kvm *kvm, unsigned long type) +{ + int rc; + u32 val; + + if (!kvm->arch.aia.aplic_state) + return -ENODEV; + + rc = aplic_mmio_read_offset(kvm, type, &val); + if (rc) + return rc; + + return 0; +} + int kvm_riscv_aia_aplic_init(struct kvm *kvm) { int i, ret = 0; |