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KVM: arm64: Change 'pkvm_handle_t' to u16

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'pkvm_handle_t' doesn't need to be a 32-bit type and subsequent patches
will rely on it being no more than 16 bits so that it can be encoded
into a pte annotation.

Change 'pkvm_handle_t' to a u16 and add a compile-type check that the
maximum handle fits into the reduced type.

Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-24-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Will Deacon
2026-03-30 15:48:24 +01:00
committed by Marc Zyngier
parent afa72d207e
commit 44887977ab
2 changed files with 2 additions and 1 deletions
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2
arch/arm64/include/asm/kvm_host.h
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@@ -247,7 +247,7 @@ struct kvm_smccc_features {
unsigned long vendor_hyp_bmap_2; /* Function numbers 64-127 */
};
typedef unsigned int pkvm_handle_t;
typedef u16 pkvm_handle_t;
struct kvm_protected_vm {
pkvm_handle_t handle;