diff options
Diffstat (limited to 'pkg/sentry/platform/ring0')
| -rw-r--r-- | pkg/sentry/platform/ring0/defs_impl_arm64.go | 2 | ||||
| -rw-r--r-- | pkg/sentry/platform/ring0/entry_impl_arm64.s | 74 | ||||
| -rw-r--r-- | pkg/sentry/platform/ring0/kernel_arm64.go | 4 |
3 files changed, 39 insertions, 41 deletions
diff --git a/pkg/sentry/platform/ring0/defs_impl_arm64.go b/pkg/sentry/platform/ring0/defs_impl_arm64.go index 1990580f3..0fa87bf3e 100644 --- a/pkg/sentry/platform/ring0/defs_impl_arm64.go +++ b/pkg/sentry/platform/ring0/defs_impl_arm64.go @@ -84,6 +84,7 @@ const ( El0SyncIa El0SyncFpsimdAcc El0SyncSveAcc + El0SyncFpsimdExc El0SyncSys El0SyncSpPc El0SyncUndef @@ -368,6 +369,7 @@ func Emit(w io.Writer) { fmt.Fprintf(w, "#define El0SyncIa 0x%02x\n", El0SyncIa) fmt.Fprintf(w, "#define El0SyncFpsimdAcc 0x%02x\n", El0SyncFpsimdAcc) fmt.Fprintf(w, "#define El0SyncSveAcc 0x%02x\n", El0SyncSveAcc) + fmt.Fprintf(w, "#define El0SyncFpsimdExc 0x%02x\n", El0SyncFpsimdExc) fmt.Fprintf(w, "#define El0SyncSys 0x%02x\n", El0SyncSys) fmt.Fprintf(w, "#define El0SyncSpPc 0x%02x\n", El0SyncSpPc) fmt.Fprintf(w, "#define El0SyncUndef 0x%02x\n", El0SyncUndef) diff --git a/pkg/sentry/platform/ring0/entry_impl_arm64.s b/pkg/sentry/platform/ring0/entry_impl_arm64.s index 1dedf9a03..6dfb029ba 100644 --- a/pkg/sentry/platform/ring0/entry_impl_arm64.s +++ b/pkg/sentry/platform/ring0/entry_impl_arm64.s @@ -440,12 +440,12 @@ MOVD R4, CPU_REGISTERS+PTRACE_SP(RSV_REG); \ LOAD_KERNEL_STACK(RSV_REG); // Load the temporary stack. -// EXCEPTION_WITH_ERROR is a common exception handler function. -#define EXCEPTION_WITH_ERROR(user, vector) \ +// EXCEPTION_EL0 is a common el0 exception handler function. +#define EXCEPTION_EL0(vector) \ WORD $0xd538d092; \ //MRS TPIDR_EL1, R18 WORD $0xd538601a; \ //MRS FAR_EL1, R26 MOVD R26, CPU_FAULT_ADDR(RSV_REG); \ - MOVD $user, R3; \ + MOVD $1, R3; \ MOVD R3, CPU_ERROR_TYPE(RSV_REG); \ // Set error type to user. MOVD $vector, R3; \ MOVD R3, CPU_VECTOR_CODE(RSV_REG); \ @@ -453,6 +453,12 @@ MOVD R3, CPU_ERROR_CODE(RSV_REG); \ B ·kernelExitToEl1(SB); +// EXCEPTION_EL1 is a common el1 exception handler function. +#define EXCEPTION_EL1(vector) \ + MOVD $vector, R3; \ + MOVD R3, 8(RSP); \ + B ·HaltEl1ExceptionAndResume(SB); + // storeAppASID writes the application's asid value. TEXT ·storeAppASID(SB),NOSPLIT,$0-8 MOVD asid+0(FP), R1 @@ -500,6 +506,16 @@ TEXT ·HaltEl1SvcAndResume(SB),NOSPLIT,$0 CALL ·kernelSyscall(SB) // Call the trampoline. B ·kernelExitToEl1(SB) // Resume. +// HaltEl1ExceptionAndResume calls Hooks.KernelException and resume. +TEXT ·HaltEl1ExceptionAndResume(SB),NOSPLIT,$0-8 + WORD $0xd538d092 // MRS TPIDR_EL1, R18 + MOVD CPU_SELF(RSV_REG), R3 // Load vCPU. + MOVD R3, 8(RSP) // First argument (vCPU). + MOVD vector+0(FP), R3 + MOVD R3, 16(RSP) // Second argument (vector). + CALL ·kernelException(SB) // Call the trampoline. + B ·kernelExitToEl1(SB) // Resume. + // Shutdown stops the guest. TEXT ·Shutdown(SB),NOSPLIT,$0 // PSCI EVENT. @@ -662,39 +678,22 @@ TEXT ·El1_sync(SB),NOSPLIT,$0 B el1_invalid el1_da: + EXCEPTION_EL1(El1SyncDa) el1_ia: - WORD $0xd538d092 //MRS TPIDR_EL1, R18 - WORD $0xd538601a //MRS FAR_EL1, R26 - - MOVD R26, CPU_FAULT_ADDR(RSV_REG) - - MOVD $0, CPU_ERROR_TYPE(RSV_REG) - - MOVD $PageFault, R3 - MOVD R3, CPU_VECTOR_CODE(RSV_REG) - - B ·HaltAndResume(SB) - + EXCEPTION_EL1(El1SyncIa) el1_sp_pc: - B ·Shutdown(SB) - + EXCEPTION_EL1(El1SyncSpPc) el1_undef: - B ·Shutdown(SB) - + EXCEPTION_EL1(El1SyncUndef) el1_svc: - MOVD $0, CPU_ERROR_CODE(RSV_REG) - MOVD $0, CPU_ERROR_TYPE(RSV_REG) B ·HaltEl1SvcAndResume(SB) - el1_dbg: - B ·Shutdown(SB) - + EXCEPTION_EL1(El1SyncDbg) el1_fpsimd_acc: VFP_ENABLE B ·kernelExitToEl1(SB) // Resume. - el1_invalid: - B ·Shutdown(SB) + EXCEPTION_EL1(El1SyncInv) // El1_irq is the handler for El1_irq. TEXT ·El1_irq(SB),NOSPLIT,$0 @@ -750,28 +749,21 @@ el0_svc: el0_da: el0_ia: - EXCEPTION_WITH_ERROR(1, PageFault) - + EXCEPTION_EL0(PageFault) el0_fpsimd_acc: - B ·Shutdown(SB) - + EXCEPTION_EL0(El0SyncFpsimdAcc) el0_sve_acc: - B ·Shutdown(SB) - + EXCEPTION_EL0(El0SyncSveAcc) el0_fpsimd_exc: - B ·Shutdown(SB) - + EXCEPTION_EL0(El0SyncFpsimdExc) el0_sp_pc: - B ·Shutdown(SB) - + EXCEPTION_EL0(El0SyncSpPc) el0_undef: - EXCEPTION_WITH_ERROR(1, El0SyncUndef) - + EXCEPTION_EL0(El0SyncUndef) el0_dbg: - B ·Shutdown(SB) - + EXCEPTION_EL0(El0SyncDbg) el0_invalid: - B ·Shutdown(SB) + EXCEPTION_EL0(El0SyncInv) TEXT ·El0_irq(SB),NOSPLIT,$0 B ·Shutdown(SB) diff --git a/pkg/sentry/platform/ring0/kernel_arm64.go b/pkg/sentry/platform/ring0/kernel_arm64.go index 6cbbf001f..20cc65312 100644 --- a/pkg/sentry/platform/ring0/kernel_arm64.go +++ b/pkg/sentry/platform/ring0/kernel_arm64.go @@ -24,6 +24,10 @@ func HaltAndResume() //go:nosplit func HaltEl1SvcAndResume() +// HaltEl1ExceptionAndResume calls Hooks.KernelException and resume. +//go:nosplit +func HaltEl1ExceptionAndResume() + // init initializes architecture-specific state. func (k *Kernel) init(maxCPUs int) { } |