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KVM: arm64: Allow kvm_has_feat() to take variable arguments

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In order to be able to write more compact (and easier to read) code,
let kvm_has_feat() and co take variable arguments. This enables
constructs such as:

	#define FEAT_SME	ID_AA64PFR1_EL1, SME, IMP

	if (kvm_has_feat(kvm, FEAT_SME))
		[...]

which is admitedly more readable.

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2025-02-09 13:38:35 +00:00
parent c6cbe6a4c1
commit a764b56bf9
1 changed files with 6 additions and 2 deletions
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8
arch/arm64/include/asm/kvm_host.h
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@ -1572,12 +1572,16 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
kvm_cmp_feat_signed(kvm, id, fld, op, limit) : \
kvm_cmp_feat_unsigned(kvm, id, fld, op, limit))
#define kvm_has_feat(kvm, id, fld, limit) \
#define __kvm_has_feat(kvm, id, fld, limit) \
kvm_cmp_feat(kvm, id, fld, >=, limit)
#define kvm_has_feat_enum(kvm, id, fld, val) \
#define kvm_has_feat(kvm, ...) __kvm_has_feat(kvm, __VA_ARGS__)
#define __kvm_has_feat_enum(kvm, id, fld, val) \
kvm_cmp_feat_unsigned(kvm, id, fld, ==, val)
#define kvm_has_feat_enum(kvm, ...) __kvm_has_feat_enum(kvm, __VA_ARGS__)
#define kvm_has_feat_range(kvm, id, fld, min, max) \
(kvm_cmp_feat(kvm, id, fld, >=, min) && \
kvm_cmp_feat(kvm, id, fld, <=, max))