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| author | Oliver Upton <oliver.upton@linux.dev> | 2023-04-04 17:40:43 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-04-05 13:07:41 +0200 |
| commit | a8308b3fc9494953c453480fb277e24f82f7d2b9 (patch) | |
| tree | a53565c93c7b91dd385a98555d67cccb518beb06 /arch/arm64/include/uapi/asm | |
| parent | KVM: arm64: Start handling SMCs from EL1 (diff) | |
| download | linux-a8308b3fc9494953c453480fb277e24f82f7d2b9.tar.xz linux-a8308b3fc9494953c453480fb277e24f82f7d2b9.zip | |
KVM: arm64: Refactor hvc filtering to support different actions
KVM presently allows userspace to filter guest hypercalls with bitmaps
expressed via pseudo-firmware registers. These bitmaps have a narrow
scope and, of course, can only allow/deny a particular call. A
subsequent change to KVM will introduce a generalized UAPI for filtering
hypercalls, allowing functions to be forwarded to userspace.
Refactor the existing hypercall filtering logic to make room for more
than two actions. While at it, generalize the function names around
SMCCC as it is the basis for the upcoming UAPI.
No functional change intended.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230404154050.2270077-7-oliver.upton@linux.dev
Diffstat (limited to 'arch/arm64/include/uapi/asm')
| -rw-r--r-- | arch/arm64/include/uapi/asm/kvm.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index f8129c624b07..f9672ef1159a 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -469,6 +469,15 @@ enum { /* run->fail_entry.hardware_entry_failure_reason codes. */ #define KVM_EXIT_FAIL_ENTRY_CPU_UNSUPPORTED (1ULL << 0) +enum kvm_smccc_filter_action { + KVM_SMCCC_FILTER_HANDLE = 0, + KVM_SMCCC_FILTER_DENY, + +#ifdef __KERNEL__ + NR_SMCCC_FILTER_ACTIONS +#endif +}; + #endif #endif /* __ARM_KVM_H__ */ |