diff options
| author | Anup Patel <anup.patel@wdc.com> | 2021-09-27 17:10:09 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-10-04 16:02:19 +0530 |
| commit | 9d05c1fee837572d91f2b5463d67d4e098987e95 (patch) | |
| tree | 20bd9ca4c62f902083a58f40b90f9a3064246014 /arch/riscv/kvm/main.c | |
| parent | fd7bb4a251dfc1da3496bf59a4793937c13e8c1f (diff) | |
RISC-V: KVM: Implement stage2 page table programming
This patch implements all required functions for programming
the stage2 page table for each Guest/VM.
At high-level, the flow of stage2 related functions is similar
from KVM ARM/ARM64 implementation but the stage2 page table
format is quite different for KVM RISC-V.
[jiangyifei: stage2 dirty log support]
Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kvm/main.c')
| -rw-r--r-- | arch/riscv/kvm/main.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c index 49a4941e3838..421ecf4e6360 100644 --- a/arch/riscv/kvm/main.c +++ b/arch/riscv/kvm/main.c @@ -64,6 +64,8 @@ void kvm_arch_hardware_disable(void) int kvm_arch_init(void *opaque) { + const char *str; + if (!riscv_isa_extension_available(NULL, h)) { kvm_info("hypervisor extension not available\n"); return -ENODEV; @@ -79,10 +81,27 @@ int kvm_arch_init(void *opaque) return -ENODEV; } + kvm_riscv_stage2_mode_detect(); + kvm_riscv_stage2_vmid_detect(); kvm_info("hypervisor extension available\n"); + switch (kvm_riscv_stage2_mode()) { + case HGATP_MODE_SV32X4: + str = "Sv32x4"; + break; + case HGATP_MODE_SV39X4: + str = "Sv39x4"; + break; + case HGATP_MODE_SV48X4: + str = "Sv48x4"; + break; + default: + return -ENODEV; + } + kvm_info("using %s G-stage page table format\n", str); + kvm_info("VMID %ld bits available\n", kvm_riscv_stage2_vmid_bits()); return 0; |