KVM: arm64: Remove the target table

Finally, remove the target table. Merge the code that checks the
tables into kvm_reset_sys_regs() as there is now only one table.

Signed-off-by: James Morse <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: James Morse

arch/arm64/include/asm/kvm_coproc.h

@@ -19,13 +19,6 @@ struct kvm_sys_reg_table {
 	size_t num;
 };
 
-struct kvm_sys_reg_target_table {
-	struct kvm_sys_reg_table table64;
-	struct kvm_sys_reg_table table32;
-};
-
-void kvm_check_target_sys_reg_table(struct kvm_sys_reg_target_table *table);
-
 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run);
 int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run);
 int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run);

arch/arm64/kvm/Makefile

@@ -14,7 +14,7 @@ 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 \
-	 guest.o debug.o reset.o sys_regs.o sys_regs_generic_v8.o \
+	 guest.o debug.o reset.o sys_regs.o \
 	 vgic-sys-reg-v3.o fpsimd.o pmu.o \
 	 aarch32.o arch_timer.o \
 	 vgic/vgic.o vgic/vgic-init.o \

arch/arm64/kvm/sys_regs.c

@@ -2137,28 +2137,6 @@ static int check_sysreg_table(const struct sys_reg_desc *table, unsigned int n,
 	return 0;
 }
 
-void kvm_check_target_sys_reg_table(struct kvm_sys_reg_target_table *table)
-{
-	BUG_ON(check_sysreg_table(table->table64.table, table->table64.num, false));
-	BUG_ON(check_sysreg_table(table->table32.table, table->table32.num, true));
-}
-
-/* Get specific register table for this target. */
-static const struct sys_reg_desc *get_target_table(unsigned target,
-						   bool mode_is_64,
-						   size_t *num)
-{
-	struct kvm_sys_reg_target_table *table = &genericv8_target_table;
-
-	if (mode_is_64) {
-		*num = table->table64.num;
-		return table->table64.table;
-	} else {
-		*num = table->table32.num;
-		return table->table32.table;
-	}
-}
-
 static int match_sys_reg(const void *key, const void *elt)
 {
 	const unsigned long pval = (unsigned long)key;
@@ -2393,14 +2371,20 @@ static int emulate_sys_reg(struct kvm_vcpu *vcpu,
 	return 1;
 }
 
-static void reset_sys_reg_descs(struct kvm_vcpu *vcpu,
-				const struct sys_reg_desc *table, size_t num)
+/**
+ * kvm_reset_sys_regs - sets system registers to reset value
+ * @vcpu: The VCPU pointer
+ *
+ * This function finds the right table above and sets the registers on the
+ * virtual CPU struct to their architecturally defined reset values.
+ */
+void kvm_reset_sys_regs(struct kvm_vcpu *vcpu)
 {
 	unsigned long i;
 
-	for (i = 0; i < num; i++)
-		if (table[i].reset)
-			table[i].reset(vcpu, &table[i]);
+	for (i = 0; i < ARRAY_SIZE(sys_reg_descs); i++)
+		if (sys_reg_descs[i].reset)
+			sys_reg_descs[i].reset(vcpu, &sys_reg_descs[i]);
 }
 
 /**
@@ -2869,22 +2853,3 @@ void kvm_sys_reg_table_init(void)
 	/* Clear all higher bits. */
 	cache_levels &= (1 << (i*3))-1;
 }
-
-/**
- * kvm_reset_sys_regs - sets system registers to reset value
- * @vcpu: The VCPU pointer
- *
- * This function finds the right table above and sets the registers on the
- * virtual CPU struct to their architecturally defined reset values.
- */
-void kvm_reset_sys_regs(struct kvm_vcpu *vcpu)
-{
-	size_t num;
-	const struct sys_reg_desc *table;
-
-	/* Generic chip reset first (so target could override). */
-	reset_sys_reg_descs(vcpu, sys_reg_descs, ARRAY_SIZE(sys_reg_descs));
-
-	table = get_target_table(vcpu->arch.target, true, &num);
-	reset_sys_reg_descs(vcpu, table, num);
-}

arch/arm64/kvm/sys_regs.h

@@ -165,6 +165,4 @@ const struct sys_reg_desc *find_reg_by_id(u64 id,
 	CRn(sys_reg_CRn(reg)), CRm(sys_reg_CRm(reg)),	\
 	Op2(sys_reg_Op2(reg))
 
-extern struct kvm_sys_reg_target_table genericv8_target_table;
-
 #endif /* __ARM64_KVM_SYS_REGS_LOCAL_H__ */