Merge tag 'kvmarm-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for v5.14.

- Add MTE support in guests, complete with tag save/restore interface
- Reduce the impact of CMOs by moving them in the page-table code
- Allow device block mappings at stage-2
- Reduce the footprint of the vmemmap in protected mode
- Support the vGIC on dumb systems such as the Apple M1
- Add selftest infrastructure to support multiple configuration
  and apply that to PMU/non-PMU setups
- Add selftests for the debug architecture
- The usual crop of PMU fixes

3 files changed, 92 insertions, 18 deletions

diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h
index b7fa0c8551db..27dc5c2e56b9 100644
--- a/tools/testing/selftests/kvm/include/aarch64/processor.h
+++ b/tools/testing/selftests/kvm/include/aarch64/processor.h
@@ -8,16 +8,20 @@
 #define SELFTEST_KVM_PROCESSOR_H
 
 #include "kvm_util.h"
+#include <linux/stringify.h>
 
 
 #define ARM64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
 			   KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x))
 
-#define CPACR_EL1	3, 0,  1, 0, 2
-#define TCR_EL1		3, 0,  2, 0, 2
-#define MAIR_EL1	3, 0, 10, 2, 0
-#define TTBR0_EL1	3, 0,  2, 0, 0
-#define SCTLR_EL1	3, 0,  1, 0, 0
+#define CPACR_EL1               3, 0,  1, 0, 2
+#define TCR_EL1                 3, 0,  2, 0, 2
+#define MAIR_EL1                3, 0, 10, 2, 0
+#define TTBR0_EL1               3, 0,  2, 0, 0
+#define SCTLR_EL1               3, 0,  1, 0, 0
+#define VBAR_EL1                3, 0, 12, 0, 0
+
+#define ID_AA64DFR0_EL1         3, 0,  0, 5, 0
 
 /*
  * Default MAIR
@@ -56,4 +60,73 @@ void aarch64_vcpu_setup(struct kvm_vm *vm, int vcpuid, struct kvm_vcpu_init *ini
 void aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid,
 			      struct kvm_vcpu_init *init, void *guest_code);
 
+struct ex_regs {
+	u64 regs[31];
+	u64 sp;
+	u64 pc;
+	u64 pstate;
+};
+
+#define VECTOR_NUM	16
+
+enum {
+	VECTOR_SYNC_CURRENT_SP0,
+	VECTOR_IRQ_CURRENT_SP0,
+	VECTOR_FIQ_CURRENT_SP0,
+	VECTOR_ERROR_CURRENT_SP0,
+
+	VECTOR_SYNC_CURRENT,
+	VECTOR_IRQ_CURRENT,
+	VECTOR_FIQ_CURRENT,
+	VECTOR_ERROR_CURRENT,
+
+	VECTOR_SYNC_LOWER_64,
+	VECTOR_IRQ_LOWER_64,
+	VECTOR_FIQ_LOWER_64,
+	VECTOR_ERROR_LOWER_64,
+
+	VECTOR_SYNC_LOWER_32,
+	VECTOR_IRQ_LOWER_32,
+	VECTOR_FIQ_LOWER_32,
+	VECTOR_ERROR_LOWER_32,
+};
+
+#define VECTOR_IS_SYNC(v) ((v) == VECTOR_SYNC_CURRENT_SP0 || \
+			   (v) == VECTOR_SYNC_CURRENT     || \
+			   (v) == VECTOR_SYNC_LOWER_64    || \
+			   (v) == VECTOR_SYNC_LOWER_32)
+
+#define ESR_EC_NUM		64
+#define ESR_EC_SHIFT		26
+#define ESR_EC_MASK		(ESR_EC_NUM - 1)
+
+#define ESR_EC_SVC64		0x15
+#define ESR_EC_HW_BP_CURRENT	0x31
+#define ESR_EC_SSTEP_CURRENT	0x33
+#define ESR_EC_WP_CURRENT	0x35
+#define ESR_EC_BRK_INS		0x3c
+
+void vm_init_descriptor_tables(struct kvm_vm *vm);
+void vcpu_init_descriptor_tables(struct kvm_vm *vm, uint32_t vcpuid);
+
+typedef void(*handler_fn)(struct ex_regs *);
+void vm_install_exception_handler(struct kvm_vm *vm,
+		int vector, handler_fn handler);
+void vm_install_sync_handler(struct kvm_vm *vm,
+		int vector, int ec, handler_fn handler);
+
+#define write_sysreg(reg, val)						  \
+({									  \
+	u64 __val = (u64)(val);						  \
+	asm volatile("msr " __stringify(reg) ", %x0" : : "rZ" (__val));	  \
+})
+
+#define read_sysreg(reg)						  \
+({	u64 val;							  \
+	asm volatile("mrs %0, "__stringify(reg) : "=r"(val) : : "memory");\
+	val;								  \
+})
+
+#define isb()	asm volatile("isb" : : : "memory")
+
 #endif /* SELFTEST_KVM_PROCESSOR_H */
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 45678a2566dd..615ab254899d 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -353,6 +353,7 @@ enum {
 	UCALL_SYNC,
 	UCALL_ABORT,
 	UCALL_DONE,
+	UCALL_UNHANDLED,
 };
 
 #define UCALL_MAX_ARGS 6
@@ -371,27 +372,29 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc);
 				ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
 #define GUEST_SYNC(stage)	ucall(UCALL_SYNC, 2, "hello", stage)
 #define GUEST_DONE()		ucall(UCALL_DONE, 0)
-#define __GUEST_ASSERT(_condition, _nargs, _args...) do {	\
-	if (!(_condition))					\
-		ucall(UCALL_ABORT, 2 + _nargs,			\
-			"Failed guest assert: "			\
-			#_condition, __LINE__, _args);		\
+#define __GUEST_ASSERT(_condition, _condstr, _nargs, _args...) do {    \
+	if (!(_condition))                                              \
+		ucall(UCALL_ABORT, 2 + _nargs,                          \
+			"Failed guest assert: "                         \
+			_condstr, __LINE__, _args);                     \
 } while (0)
 
 #define GUEST_ASSERT(_condition) \
-	__GUEST_ASSERT((_condition), 0, 0)
+	__GUEST_ASSERT(_condition, #_condition, 0, 0)
 
 #define GUEST_ASSERT_1(_condition, arg1) \
-	__GUEST_ASSERT((_condition), 1, (arg1))
+	__GUEST_ASSERT(_condition, #_condition, 1, (arg1))
 
 #define GUEST_ASSERT_2(_condition, arg1, arg2) \
-	__GUEST_ASSERT((_condition), 2, (arg1), (arg2))
+	__GUEST_ASSERT(_condition, #_condition, 2, (arg1), (arg2))
 
 #define GUEST_ASSERT_3(_condition, arg1, arg2, arg3) \
-	__GUEST_ASSERT((_condition), 3, (arg1), (arg2), (arg3))
+	__GUEST_ASSERT(_condition, #_condition, 3, (arg1), (arg2), (arg3))
 
 #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \
-	__GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4))
+	__GUEST_ASSERT(_condition, #_condition, 4, (arg1), (arg2), (arg3), (arg4))
+
+#define GUEST_ASSERT_EQ(a, b) __GUEST_ASSERT((a) == (b), #a " == " #b, 2, a, b)
 
 int vm_get_stats_fd(struct kvm_vm *vm);
 int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid);
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 6d27a5435971..242ae8e09a65 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -58,8 +58,6 @@
 /* CPUID.0x8000_0001.EDX */
 #define CPUID_GBPAGES		(1ul << 26)
 
-#define UNEXPECTED_VECTOR_PORT 0xfff0u
-
 /* General Registers in 64-Bit Mode */
 struct gpr64_regs {
 	u64 rax;
@@ -396,7 +394,7 @@ struct ex_regs {
 
 void vm_init_descriptor_tables(struct kvm_vm *vm);
 void vcpu_init_descriptor_tables(struct kvm_vm *vm, uint32_t vcpuid);
-void vm_handle_exception(struct kvm_vm *vm, int vector,
+void vm_install_exception_handler(struct kvm_vm *vm, int vector,
 			void (*handler)(struct ex_regs *));
 
 uint64_t vm_get_page_table_entry(struct kvm_vm *vm, int vcpuid, uint64_t vaddr);