KVM: arm64: Add predicate for FPMR support in a VM

As we are about to check for the advertisement of FPMR support to
a guest in a number of places, add a predicate that will gate most
of the support code for FPMR.

Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240820131802.3547589-3-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index e244e3176b56bbc9674be5801c44ca7423514342..e5cf8af54dd630dce9bd1274f8ebee1c9db10100 100644 (file)
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1475,4 +1475,8 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
                (pa + pi + pa3) == 1;                                   \
        })
 
+#define kvm_has_fpmr(k)                                        \
+       (system_supports_fpmr() &&                      \
+        kvm_has_feat((k), ID_AA64PFR2_EL1, FPMR, IMP))
+
 #endif /* __ARM64_KVM_HOST_H__ */