Commit 18fc7bf8 authored by Marc Zyngier's avatar Marc Zyngier

arm64: KVM: Allow for direct call of HYP functions when using VHE

When running VHE, there is no need to jump via some stub to perform
a "HYP" function call, as there is a single address space.

Let's thus change kvm_call_hyp() and co to perform a direct call
in this case. Although this results in a bit of code expansion,
it allows the compiler to check for type compatibility, something
that we are missing so far.
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Acked-by: default avatarChristoffer Dall <christoffer.dall@arm.com>
Signed-off-by: default avatarChristoffer Dall <christoffer.dall@arm.com>
parent 7aa8d146
...@@ -370,8 +370,36 @@ void kvm_arm_halt_guest(struct kvm *kvm); ...@@ -370,8 +370,36 @@ void kvm_arm_halt_guest(struct kvm *kvm);
void kvm_arm_resume_guest(struct kvm *kvm); void kvm_arm_resume_guest(struct kvm *kvm);
u64 __kvm_call_hyp(void *hypfn, ...); u64 __kvm_call_hyp(void *hypfn, ...);
#define kvm_call_hyp(f, ...) __kvm_call_hyp(kvm_ksym_ref(f), ##__VA_ARGS__)
#define kvm_call_hyp_ret(f, ...) kvm_call_hyp(f, ##__VA_ARGS__) /*
* The couple of isb() below are there to guarantee the same behaviour
* on VHE as on !VHE, where the eret to EL1 acts as a context
* synchronization event.
*/
#define kvm_call_hyp(f, ...) \
do { \
if (has_vhe()) { \
f(__VA_ARGS__); \
isb(); \
} else { \
__kvm_call_hyp(kvm_ksym_ref(f), ##__VA_ARGS__); \
} \
} while(0)
#define kvm_call_hyp_ret(f, ...) \
({ \
typeof(f(__VA_ARGS__)) ret; \
\
if (has_vhe()) { \
ret = f(__VA_ARGS__); \
isb(); \
} else { \
ret = __kvm_call_hyp(kvm_ksym_ref(f), \
##__VA_ARGS__); \
} \
\
ret; \
})
void force_vm_exit(const cpumask_t *mask); void force_vm_exit(const cpumask_t *mask);
void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
......
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