[RFC PATCH 09/27] KVM: arm64: Allow using kvm_nvhe_sym() in hyp code

[Quentin Perret]

In order to allow the usage of code shared by the host and the hyp in
static inline library function, allow the usage of kvm_nvhe_sym() at el2
by defaulting to the raw symbol name.

Signed-off-by: Quentin Perret <qperret at google.com>
---
 arch/arm64/include/asm/hyp_image.h | 4 ++++
 arch/arm64/include/asm/kvm_asm.h   | 4 ++--
 arch/arm64/kvm/arm.c               | 2 +-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/include/asm/hyp_image.h b/arch/arm64/include/asm/hyp_image.h
index daa1a1da539e..8b807b646b8f 100644
--- a/arch/arm64/include/asm/hyp_image.h
+++ b/arch/arm64/include/asm/hyp_image.h
@@ -7,11 +7,15 @@
 #ifndef __ARM64_HYP_IMAGE_H__
 #define __ARM64_HYP_IMAGE_H__
 
+#ifndef __KVM_NVHE_HYPERVISOR__
 /*
  * KVM nVHE code has its own symbol namespace prefixed with __kvm_nvhe_,
  * to separate it from the kernel proper.
  */
 #define kvm_nvhe_sym(sym)	__kvm_nvhe_##sym
+#else
+#define kvm_nvhe_sym(sym)	sym
+#endif
 
 #ifdef LINKER_SCRIPT
 
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index 1a86581e581e..e4934f5e4234 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -173,11 +173,11 @@ struct kvm_s2_mmu;
 DECLARE_KVM_NVHE_SYM(__kvm_hyp_init);
 DECLARE_KVM_NVHE_SYM(__kvm_hyp_host_vector);
 DECLARE_KVM_HYP_SYM(__kvm_hyp_vector);
-DECLARE_KVM_NVHE_SYM(__kvm_hyp_psci_cpu_entry);
 #define __kvm_hyp_init			CHOOSE_NVHE_SYM(__kvm_hyp_init)
 #define __kvm_hyp_host_vector		CHOOSE_NVHE_SYM(__kvm_hyp_host_vector)
 #define __kvm_hyp_vector		CHOOSE_HYP_SYM(__kvm_hyp_vector)
-#define __kvm_hyp_psci_cpu_entry	CHOOSE_NVHE_SYM(__kvm_hyp_psci_cpu_entry)
+
+void kvm_nvhe_sym(__kvm_hyp_psci_cpu_entry)(void);
 
 extern unsigned long kvm_arm_hyp_percpu_base[NR_CPUS];
 DECLARE_KVM_NVHE_SYM(__per_cpu_start);
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 882eb383bd75..391cf6753a13 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1369,7 +1369,7 @@ static void cpu_prepare_hyp_mode(int cpu)
 
 	params->vector_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref(__kvm_hyp_host_vector));
 	params->stack_hyp_va = kern_hyp_va(per_cpu(kvm_arm_hyp_stack_page, cpu) + PAGE_SIZE);
-	params->entry_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref(__kvm_hyp_psci_cpu_entry));
+	params->entry_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref_nvhe(__kvm_hyp_psci_cpu_entry));
 	params->pgd_pa = kvm_mmu_get_httbr();
 
 	/*
-- 
2.29.2.299.gdc1121823c-goog