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Commit e7858c58 authored by Marc Zyngier's avatar Marc Zyngier Committed by Christoffer Dall
Browse files

ARM: KVM: move hyp init to kvm_host.h 



Make the split of the pgd_ptr an implementation specific thing
by moving the init call to an inline function.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 629dc446

arch/arm/include/asm/kvm_host.h

+19 −0
Original line number Diff line number Diff line
@@ -186,4 +186,23 @@ int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); 
int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,

		int exception_index);



static inline void __cpu_init_hyp_mode(unsigned long long pgd_ptr,

				       unsigned long hyp_stack_ptr,

				       unsigned long vector_ptr)

{

	unsigned long pgd_low, pgd_high;



	pgd_low = (pgd_ptr & ((1ULL << 32) - 1));

	pgd_high = (pgd_ptr >> 32ULL);



	/*

	 * Call initialization code, and switch to the full blown

	 * HYP code. The init code doesn't need to preserve these registers as

	 * r1-r3 and r12 are already callee save according to the AAPCS.

	 * Note that we slightly misuse the prototype by casing the pgd_low to

	 * a void *.

	 */

	kvm_call_hyp((void *)pgd_low, pgd_high, hyp_stack_ptr, vector_ptr);

}



#endif /* __ARM_KVM_HOST_H__ */

arch/arm/kvm/arm.c

+1 −11
Original line number Diff line number Diff line
@@ -813,7 +813,6 @@ long kvm_arch_vm_ioctl(struct file *filp, 
static void cpu_init_hyp_mode(void *vector)

{

	unsigned long long pgd_ptr;

	unsigned long pgd_low, pgd_high;

	unsigned long hyp_stack_ptr;

	unsigned long stack_page;

	unsigned long vector_ptr;
@@ -822,20 +821,11 @@ static void cpu_init_hyp_mode(void *vector) 
	__hyp_set_vectors((unsigned long)vector);



	pgd_ptr = (unsigned long long)kvm_mmu_get_httbr();

	pgd_low = (pgd_ptr & ((1ULL << 32) - 1));

	pgd_high = (pgd_ptr >> 32ULL);

	stack_page = __get_cpu_var(kvm_arm_hyp_stack_page);

	hyp_stack_ptr = stack_page + PAGE_SIZE;

	vector_ptr = (unsigned long)__kvm_hyp_vector;



	/*

	 * Call initialization code, and switch to the full blown

	 * HYP code. The init code doesn't need to preserve these registers as

	 * r1-r3 and r12 are already callee save according to the AAPCS.

	 * Note that we slightly misuse the prototype by casing the pgd_low to

	 * a void *.

	 */

	kvm_call_hyp((void *)pgd_low, pgd_high, hyp_stack_ptr, vector_ptr);

	__cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr);

}



/**