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RISC-V: KVM: Add new exit statstics for redirected traps

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Currently, kvm doesn't delegate the few traps such as misaligned
load/store, illegal instruction and load/store access faults because it
is not expected to occur in the guest very frequently. Thus, kvm gets a
chance to act upon it or collect statistics about it before redirecting
the traps to the guest.

Collect both guest and host visible statistics during the traps.
Enable them so that both guest and host can collect the stats about
them if required.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20241224-kvm_guest_stat-v2-3-08a77ac36b02@rivosinc.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Atish Patra
2024-12-24 13:04:55 -08:00
committed by Anup Patel
parent 2f15b5eaff
commit af79caa83f
3 changed files with 16 additions and 1 deletions
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5
arch/riscv/include/asm/kvm_host.h
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@@ -87,6 +87,11 @@ struct kvm_vcpu_stat {
u64 csr_exit_kernel;
u64 signal_exits;
u64 exits;
u64 instr_illegal_exits;
u64 load_misaligned_exits;
u64 store_misaligned_exits;
u64 load_access_exits;
u64 store_access_exits;
};
struct kvm_arch_memory_slot {