diff options
| author | Bin Lu <bin.lu@arm.com> | 2020-01-29 07:50:34 -0500 |
|---|---|---|
| committer | Bin Lu <bin.lu@arm.com> | 2020-01-29 07:50:38 -0500 |
| commit | 6adbdfe232c3da42a7f6f3a7d882d140196e4068 (patch) | |
| tree | 083220be2231af200e17507fb489da91f8769f09 | |
| parent | 4cb55a7a3b09c430fa2b7197fdc7b84b7e88a6ed (diff) | |
supporting sError in guest kernel on Arm64
For test case 'TestBounce', we use KVM_SET_VCPU_EVENTS to trigger sError
to leave guest.
Signed-off-by: Bin Lu <bin.lu@arm.com>
| -rw-r--r-- | pkg/sentry/platform/ring0/aarch64.go | 6 | ||||
| -rw-r--r-- | pkg/sentry/platform/ring0/entry_arm64.s | 14 | ||||
| -rw-r--r-- | pkg/sentry/platform/ring0/offsets_arm64.go | 1 |
3 files changed, 17 insertions, 4 deletions
diff --git a/pkg/sentry/platform/ring0/aarch64.go b/pkg/sentry/platform/ring0/aarch64.go index 6b078cd1e..f6da41c27 100644 --- a/pkg/sentry/platform/ring0/aarch64.go +++ b/pkg/sentry/platform/ring0/aarch64.go @@ -88,14 +88,14 @@ const ( El0Sync_undef El0Sync_dbg El0Sync_inv - VirtualizationException _NR_INTERRUPTS ) // System call vectors. const ( - Syscall Vector = El0Sync_svc - PageFault Vector = El0Sync_da + Syscall Vector = El0Sync_svc + PageFault Vector = El0Sync_da + VirtualizationException Vector = El0Error ) // VirtualAddressBits returns the number bits available for virtual addresses. diff --git a/pkg/sentry/platform/ring0/entry_arm64.s b/pkg/sentry/platform/ring0/entry_arm64.s index 679842288..baa6c4910 100644 --- a/pkg/sentry/platform/ring0/entry_arm64.s +++ b/pkg/sentry/platform/ring0/entry_arm64.s @@ -601,7 +601,19 @@ TEXT ·El0_fiq(SB),NOSPLIT,$0 B ·Shutdown(SB) TEXT ·El0_error(SB),NOSPLIT,$0 - B ·Shutdown(SB) + KERNEL_ENTRY_FROM_EL0 + WORD $0xd538d092 //MRS TPIDR_EL1, R18 + WORD $0xd538601a //MRS FAR_EL1, R26 + + MOVD R26, CPU_FAULT_ADDR(RSV_REG) + + MOVD $1, R3 + MOVD R3, CPU_ERROR_TYPE(RSV_REG) // Set error type to user. + + MOVD $VirtualizationException, R3 + MOVD R3, CPU_VECTOR_CODE(RSV_REG) + + B ·Halt(SB) TEXT ·El0_sync_invalid(SB),NOSPLIT,$0 B ·Shutdown(SB) diff --git a/pkg/sentry/platform/ring0/offsets_arm64.go b/pkg/sentry/platform/ring0/offsets_arm64.go index 8c960c749..057fb5c69 100644 --- a/pkg/sentry/platform/ring0/offsets_arm64.go +++ b/pkg/sentry/platform/ring0/offsets_arm64.go @@ -85,6 +85,7 @@ func Emit(w io.Writer) { fmt.Fprintf(w, "#define PageFault 0x%02x\n", PageFault) fmt.Fprintf(w, "#define Syscall 0x%02x\n", Syscall) + fmt.Fprintf(w, "#define VirtualizationException 0x%02x\n", VirtualizationException) p := &syscall.PtraceRegs{} fmt.Fprintf(w, "\n// Ptrace registers.\n") |