diff options
| author | Anup Patel <anup.patel@wdc.com> | 2021-11-26 12:35:51 +0100 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-01-06 10:46:58 +0100 |
| commit | a457fd5660efa9cf960d2461156a1025bfdb13fa (patch) | |
| tree | 74381143d7ad54e9dd3238f35cc79257070a355d /arch/riscv/include | |
| parent | RISC-V: KVM: Forward SBI experimental and vendor extensions (diff) | |
| download | linux-a457fd5660efa9cf960d2461156a1025bfdb13fa.tar.xz linux-a457fd5660efa9cf960d2461156a1025bfdb13fa.zip | |
RISC-V: KVM: Add VM capability to allow userspace get GPA bits
The number of GPA bits supported for a RISC-V Guest/VM is based on the
MMU mode used by the G-stage translation. The KVM RISC-V will detect and
use the best possible MMU mode for the G-stage in kvm_arch_init().
We add a generic VM capability KVM_CAP_VM_GPA_BITS which can be used by
the KVM userspace to get the number of GPA (guest physical address) bits
supported for a Guest/VM.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-and-tested-by: Atish Patra <atishp@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 52e19888ce43..99ef6a120617 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -218,6 +218,7 @@ void kvm_riscv_stage2_free_pgd(struct kvm *kvm); void kvm_riscv_stage2_update_hgatp(struct kvm_vcpu *vcpu); void kvm_riscv_stage2_mode_detect(void); unsigned long kvm_riscv_stage2_mode(void); +int kvm_riscv_stage2_gpa_bits(void); void kvm_riscv_stage2_vmid_detect(void); unsigned long kvm_riscv_stage2_vmid_bits(void); |