diff options
| author | Ricardo Koller <ricarkol@google.com> | 2021-06-10 18:10:19 -0700 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-14 09:06:23 +0100 |
| commit | e3db7579ef355a0b2bfef4448b84d9ac882c8f2c (patch) | |
| tree | b8b0354b427585812cd2182cf7d788442b657988 /tools/testing/selftests/kvm/include | |
| parent | 67f709f52bf0b5c19f24d1234163123cbb6af545 (diff) | |
KVM: selftests: Add exception handling support for aarch64
Add the infrastructure needed to enable exception handling in aarch64
selftests. The exception handling defaults to an unhandled-exception
handler which aborts the test, just like x86. These handlers can be
overridden by calling vm_install_exception_handler(vector) or
vm_install_sync_handler(vector, ec). The unhandled exception reporting
from the guest is done using the ucall type introduced in a previous
commit, UCALL_UNHANDLED.
The exception handling code is inspired on kvm-unit-tests.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210611011020.3420067-6-ricarkol@google.com
Diffstat (limited to 'tools/testing/selftests/kvm/include')
| -rw-r--r-- | tools/testing/selftests/kvm/include/aarch64/processor.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h index b7fa0c8551db..b2b3e9d626cb 100644 --- a/tools/testing/selftests/kvm/include/aarch64/processor.h +++ b/tools/testing/selftests/kvm/include/aarch64/processor.h @@ -8,6 +8,7 @@ #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 | \ @@ -18,6 +19,7 @@ #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 /* * Default MAIR @@ -56,4 +58,65 @@ 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) + +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; \ +}) + #endif /* SELFTEST_KVM_PROCESSOR_H */ |