firmware/smccc: Call arch-specific hook on discovering KVM services

arm64 will soon require its own callback to initialise services that are only available on this architecture. Introduce a hook that can be overloaded by the architecture. Signed-off-by: Marc Zyngier <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]>
sedwards · Aug 30, 2024 · 0ba5b4b · 0ba5b4b
1 parent 7c626ce
commit 0ba5b4b
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diff --git a/arch/arm/include/asm/hypervisor.h b/arch/arm/include/asm/hypervisor.h
@@ -7,4 +7,6 @@
 void kvm_init_hyp_services(void);
 bool kvm_arm_hyp_service_available(u32 func_id);
 
+static inline void kvm_arch_init_hyp_services(void) { };
+
 #endif
diff --git a/arch/arm64/include/asm/hypervisor.h b/arch/arm64/include/asm/hypervisor.h
@@ -7,4 +7,8 @@
 void kvm_init_hyp_services(void);
 bool kvm_arm_hyp_service_available(u32 func_id);
 
+static inline void kvm_arch_init_hyp_services(void)
+{
+};
+
 #endif
diff --git a/drivers/firmware/smccc/kvm_guest.c b/drivers/firmware/smccc/kvm_guest.c
@@ -39,6 +39,8 @@ void __init kvm_init_hyp_services(void)
 
 	pr_info("hypervisor services detected (0x%08lx 0x%08lx 0x%08lx 0x%08lx)\n",
 		 res.a3, res.a2, res.a1, res.a0);
+
+	kvm_arch_init_hyp_services();
 }
 
 bool kvm_arm_hyp_service_available(u32 func_id)