KVM: arm64: Move hyp-init.S to nVHE

hyp-init.S contains the identity mapped initialisation code for the
non-VHE code that runs at EL2. It is only used for non-VHE.

Adjust code that calls into this to use the prefixed symbol name.

Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200625131420.71444-8-dbrazdil@google.com

arch/arm64/include/asm/kvm_asm.h

@@ -78,10 +78,9 @@
 struct kvm;
 struct kvm_vcpu;
 
-extern char __kvm_hyp_init[];
+DECLARE_KVM_NVHE_SYM(__kvm_hyp_init);
-extern char __kvm_hyp_init_end[];
-
 DECLARE_KVM_HYP_SYM(__kvm_hyp_vector);
+#define __kvm_hyp_init		CHOOSE_NVHE_SYM(__kvm_hyp_init)
 #define __kvm_hyp_vector	CHOOSE_HYP_SYM(__kvm_hyp_vector)
 
 #ifdef CONFIG_KVM_INDIRECT_VECTORS

arch/arm64/kernel/image-vars.h

@@ -71,9 +71,6 @@ KVM_NVHE_ALIAS(__guest_exit);
 KVM_NVHE_ALIAS(abort_guest_exit_end);
 KVM_NVHE_ALIAS(abort_guest_exit_start);
 
-/* Symbols defined in hyp-init.S (not yet compiled with nVHE build rules). */
-KVM_NVHE_ALIAS(__kvm_handle_stub_hvc);
-
 /* Symbols defined in switch.c (not yet compiled with nVHE build rules). */
 KVM_NVHE_ALIAS(__kvm_vcpu_run_nvhe);
 KVM_NVHE_ALIAS(hyp_panic);
@@ -113,6 +110,12 @@ KVM_NVHE_ALIAS(kimage_voffset);
 /* Kernel symbols used to call panic() from nVHE hyp code (via ERET). */
 KVM_NVHE_ALIAS(panic);
 
+/* Vectors installed by hyp-init on reset HVC. */
+KVM_NVHE_ALIAS(__hyp_stub_vectors);
+
+/* IDMAP TCR_EL1.T0SZ as computed by the EL1 init code */
+KVM_NVHE_ALIAS(idmap_t0sz);
+
 #endif /* CONFIG_KVM */
 
 #endif /* __ARM64_KERNEL_IMAGE_VARS_H */

arch/arm64/kvm/Makefile

@@ -13,7 +13,7 @@ obj-$(CONFIG_KVM) += hyp/
 kvm-y := $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o \
 	 $(KVM)/vfio.o $(KVM)/irqchip.o \
 	 arm.o mmu.o mmio.o psci.o perf.o hypercalls.o pvtime.o \
-	 inject_fault.o regmap.o va_layout.o hyp.o hyp-init.o handle_exit.o \
+	 inject_fault.o regmap.o va_layout.o hyp.o handle_exit.o \
 	 guest.o debug.o reset.o sys_regs.o sys_regs_generic_v8.o \
 	 vgic-sys-reg-v3.o fpsimd.o pmu.o \
 	 aarch32.o arch_timer.o \

arch/arm64/kvm/hyp/nvhe/Makefile

@@ -6,7 +6,7 @@
 asflags-y := -D__KVM_NVHE_HYPERVISOR__
 ccflags-y := -D__KVM_NVHE_HYPERVISOR__
 
-obj-y := ../hyp-entry.o
+obj-y := hyp-init.o ../hyp-entry.o
 
 obj-y := $(patsubst %.o,%.hyp.o,$(obj-y))
 extra-y := $(patsubst %.hyp.o,%.hyp.tmp.o,$(obj-y))