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