ARM: KVM: Convert __cpu_reset_hyp_mode to using __hyp_reset_vectors

We are now able to use the hyp stub to reset HYP mode. Time to
kiss __kvm_hyp_reset goodbye, and use __hyp_reset_vectors.
Tested-by: NKeerthy <j-keerthy@ti.com>
Acked-by: NRussell King <rmk+kernel@armlinux.org.uk>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NChristoffer Dall <cdall@linaro.org>

arch/arm/include/asm/kvm_asm.h

@@ -72,8 +72,6 @@ extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
 
 extern void __init_stage2_translation(void);
 
-extern void __kvm_hyp_reset(unsigned long);
-
 extern u64 __vgic_v3_get_ich_vtr_el2(void);
 extern u64 __vgic_v3_read_vmcr(void);
 extern void __vgic_v3_write_vmcr(u32 vmcr);

arch/arm/include/asm/kvm_host.h

@@ -273,7 +273,7 @@ static inline void __cpu_init_stage2(void)
 static inline void __cpu_reset_hyp_mode(unsigned long vector_ptr,
 					phys_addr_t phys_idmap_start)
 {
-	kvm_call_hyp((void *)virt_to_idmap(__kvm_hyp_reset), vector_ptr);
+	__hyp_reset_vectors();
 }
 
 static inline int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)

arch/arm/kvm/init.S

@@ -129,7 +129,6 @@ ENTRY(__kvm_handle_stub_hvc)
 
 1:	cmp	r0, #HVC_RESET_VECTORS
 	bne	1f
-ENTRY(__kvm_hyp_reset)
 	/* We're now in idmap, disable MMU */
 	mrc	p15, 4, r1, c1, c0, 0	@ HSCTLR
 	ldr	r0, =(HSCTLR_M | HSCTLR_A | HSCTLR_C | HSCTLR_I)
@@ -151,7 +150,6 @@ ENTRY(__kvm_hyp_reset)
 exit:
 	eret
 ENDPROC(__kvm_handle_stub_hvc)
-ENDPROC(__kvm_hyp_reset)
 
 	.ltorg