diff --git a/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java b/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
index 64658a9..b332543 100644
--- a/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
+++ b/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
@@ -49,6 +49,7 @@
 import org.junit.After;
 import org.junit.AssumptionViolatedException;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TestName;
@@ -62,6 +63,7 @@
 
 @RootPermissionTest
 @RunWith(DeviceJUnit4ClassRunner.class)
+@Ignore("TODO(b/229823049): Make this work")
 public final class AuthFsHostTest extends VirtualizationTestCaseBase {
 
     /** Test directory on Android where data are located */
diff --git a/compos/service/java/com/android/server/compos/IsolatedCompilationMetrics.java b/compos/service/java/com/android/server/compos/IsolatedCompilationMetrics.java
index a35472b..0ed2305 100644
--- a/compos/service/java/com/android/server/compos/IsolatedCompilationMetrics.java
+++ b/compos/service/java/com/android/server/compos/IsolatedCompilationMetrics.java
@@ -20,6 +20,8 @@
 import android.os.SystemClock;
 import android.util.Log;
 
+import com.android.internal.art.ArtStatsLog;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
@@ -33,30 +35,49 @@
 
     // TODO(b/218525257): Move the definition of these enums to atoms.proto
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({RESULT_SUCCESS, RESULT_UNKNOWN_FAILURE, RESULT_FAILED_TO_START, RESULT_JOB_CANCELED,
-            RESULT_COMPILATION_FAILED, RESULT_UNEXPECTED_COMPILATION_RESULT, RESULT_COMPOSD_DIED})
+    @IntDef({RESULT_UNKNOWN, RESULT_SUCCESS, RESULT_UNKNOWN_FAILURE, RESULT_FAILED_TO_START,
+            RESULT_JOB_CANCELED, RESULT_COMPILATION_FAILED, RESULT_UNEXPECTED_COMPILATION_RESULT,
+            RESULT_COMPOSD_DIED})
     public @interface CompilationResult {}
 
-    public static final int RESULT_SUCCESS = 0;
-    public static final int RESULT_UNKNOWN_FAILURE = 1;
-    public static final int RESULT_FAILED_TO_START = 2;
-    public static final int RESULT_JOB_CANCELED = 3;
-    public static final int RESULT_COMPILATION_FAILED = 4;
-    public static final int RESULT_UNEXPECTED_COMPILATION_RESULT = 5;
-    public static final int RESULT_COMPOSD_DIED = 6;
+    // Keep this in sync with Result enum in IsolatedCompilationEnded in
+    // frameworks/proto_logging/stats/atoms.proto
+    public static final int RESULT_UNKNOWN =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_UNKNOWN;
+    public static final int RESULT_SUCCESS =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_SUCCESS;
+    public static final int RESULT_UNKNOWN_FAILURE =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_UNKNOWN_FAILURE;
+    public static final int RESULT_FAILED_TO_START =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_FAILED_TO_START;
+    public static final int RESULT_JOB_CANCELED =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_JOB_CANCELED;
+    public static final int RESULT_COMPILATION_FAILED = ArtStatsLog
+            .ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_COMPILATION_FAILED;
+    public static final int RESULT_UNEXPECTED_COMPILATION_RESULT = ArtStatsLog
+            .ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_UNEXPECTED_COMPILATION_RESULT;
+    public static final int RESULT_COMPOSD_DIED =
+            ArtStatsLog.ISOLATED_COMPILATION_ENDED__COMPILATION_RESULT__RESULT_COMPOSD_DIED;
 
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({SCHEDULING_SUCCESS, SCHEDULING_FAILURE})
+    @IntDef({SCHEDULING_RESULT_UNKNOWN, SCHEDULING_SUCCESS, SCHEDULING_FAILURE})
     public @interface ScheduleJobResult {}
 
-    public static final int SCHEDULING_SUCCESS = 0;
-    public static final int SCHEDULING_FAILURE = 1;
+    // Keep this in sync with Result enum in IsolatedCompilationScheduled in
+    // frameworks/proto_logging/stats/atoms.proto
+
+    public static final int SCHEDULING_RESULT_UNKNOWN = ArtStatsLog
+            .ISOLATED_COMPILATION_SCHEDULED__SCHEDULING_RESULT__SCHEDULING_RESULT_UNKNOWN;
+    public static final int SCHEDULING_FAILURE =
+            ArtStatsLog.ISOLATED_COMPILATION_SCHEDULED__SCHEDULING_RESULT__SCHEDULING_FAILURE;
+    public static final int SCHEDULING_SUCCESS =
+            ArtStatsLog.ISOLATED_COMPILATION_SCHEDULED__SCHEDULING_RESULT__SCHEDULING_SUCCESS;
 
     private long mCompilationStartTimeMs = 0;
 
     public static void onCompilationScheduled(@ScheduleJobResult int result) {
         // TODO(b/218525257): write to ArtStatsLog instead of logcat
-        // ArtStatsLog.write(ArtStatsLog.ISOLATED_COMPILATION_SCHEDULED, result);
+        ArtStatsLog.write(ArtStatsLog.ISOLATED_COMPILATION_SCHEDULED, result);
         Log.i(TAG, "ISOLATED_COMPILATION_SCHEDULED: " + result);
     }
 
@@ -70,7 +91,7 @@
         mCompilationStartTimeMs = 0;
 
         // TODO(b/218525257): write to ArtStatsLog instead of logcat
-        // ArtStatsLog.write(ArtStatsLog.ISOLATED_COMPILATION_ENDED, result, compilationTime);
+        ArtStatsLog.write(ArtStatsLog.ISOLATED_COMPILATION_ENDED, compilationTime, result);
         Log.i(TAG, "ISOLATED_COMPILATION_ENDED: " + result + ", " + compilationTime);
     }
 }
diff --git a/pvmfw/Android.bp b/pvmfw/Android.bp
index fbdd8d7..3f6cca4 100644
--- a/pvmfw/Android.bp
+++ b/pvmfw/Android.bp
@@ -28,6 +28,7 @@
     name: "pvmfw",
     srcs: [
         "entry.S",
+        "exceptions.S",
         "idmap.S",
     ],
     static_libs: [
diff --git a/pvmfw/entry.S b/pvmfw/entry.S
index e5c6045..f0021be 100644
--- a/pvmfw/entry.S
+++ b/pvmfw/entry.S
@@ -145,6 +145,10 @@
 	adr_l x30, boot_stack_end
 	mov sp, x30
 
+	/* Set up exception vector. */
+	adr x30, vector_table_el1
+	msr vbar_el1, x30
+
 	/* Call into Rust code. */
 	bl main
 
diff --git a/pvmfw/exceptions.S b/pvmfw/exceptions.S
new file mode 100644
index 0000000..86ef83c
--- /dev/null
+++ b/pvmfw/exceptions.S
@@ -0,0 +1,178 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Saves the volatile registers onto the stack. This currently takes 14
+ * instructions, so it can be used in exception handlers with 18 instructions
+ * left.
+ *
+ * On return, x0 and x1 are initialised to elr_el2 and spsr_el2 respectively,
+ * which can be used as the first and second arguments of a subsequent call.
+ */
+.macro save_volatile_to_stack
+	/* Reserve stack space and save registers x0-x18, x29 & x30. */
+	stp x0, x1, [sp, #-(8 * 24)]!
+	stp x2, x3, [sp, #8 * 2]
+	stp x4, x5, [sp, #8 * 4]
+	stp x6, x7, [sp, #8 * 6]
+	stp x8, x9, [sp, #8 * 8]
+	stp x10, x11, [sp, #8 * 10]
+	stp x12, x13, [sp, #8 * 12]
+	stp x14, x15, [sp, #8 * 14]
+	stp x16, x17, [sp, #8 * 16]
+	str x18, [sp, #8 * 18]
+	stp x29, x30, [sp, #8 * 20]
+
+	/*
+	 * Save elr_el1 & spsr_el1. This such that we can take nested exception
+	 * and still be able to unwind.
+	 */
+	mrs x0, elr_el1
+	mrs x1, spsr_el1
+	stp x0, x1, [sp, #8 * 22]
+.endm
+
+/**
+ * Restores the volatile registers from the stack. This currently takes 14
+ * instructions, so it can be used in exception handlers while still leaving 18
+ * instructions left; if paired with save_volatile_to_stack, there are 4
+ * instructions to spare.
+ */
+.macro restore_volatile_from_stack
+	/* Restore registers x2-x18, x29 & x30. */
+	ldp x2, x3, [sp, #8 * 2]
+	ldp x4, x5, [sp, #8 * 4]
+	ldp x6, x7, [sp, #8 * 6]
+	ldp x8, x9, [sp, #8 * 8]
+	ldp x10, x11, [sp, #8 * 10]
+	ldp x12, x13, [sp, #8 * 12]
+	ldp x14, x15, [sp, #8 * 14]
+	ldp x16, x17, [sp, #8 * 16]
+	ldr x18, [sp, #8 * 18]
+	ldp x29, x30, [sp, #8 * 20]
+
+	/* Restore registers elr_el1 & spsr_el1, using x0 & x1 as scratch. */
+	ldp x0, x1, [sp, #8 * 22]
+	msr elr_el1, x0
+	msr spsr_el1, x1
+
+	/* Restore x0 & x1, and release stack space. */
+	ldp x0, x1, [sp], #8 * 24
+.endm
+
+/**
+ * This is a generic handler for exceptions taken at the current EL while using
+ * SP0. It behaves similarly to the SPx case by first switching to SPx, doing
+ * the work, then switching back to SP0 before returning.
+ *
+ * Switching to SPx and calling the Rust handler takes 16 instructions. To
+ * restore and return we need an additional 16 instructions, so we can implement
+ * the whole handler within the allotted 32 instructions.
+ */
+.macro current_exception_sp0 handler:req
+	msr spsel, #1
+	save_volatile_to_stack
+	bl \handler
+	restore_volatile_from_stack
+	msr spsel, #0
+	eret
+.endm
+
+/**
+ * This is a generic handler for exceptions taken at the current EL while using
+ * SPx. It saves volatile registers, calls the Rust handler, restores volatile
+ * registers, then returns.
+ *
+ * This also works for exceptions taken from EL0, if we don't care about
+ * non-volatile registers.
+ *
+ * Saving state and jumping to the Rust handler takes 15 instructions, and
+ * restoring and returning also takes 15 instructions, so we can fit the whole
+ * handler in 30 instructions, under the limit of 32.
+ */
+.macro current_exception_spx handler:req
+	save_volatile_to_stack
+	bl \handler
+	restore_volatile_from_stack
+	eret
+.endm
+
+.section .text.vector_table_el1, "ax"
+.global vector_table_el1
+.balign 0x800
+vector_table_el1:
+sync_cur_sp0:
+	current_exception_sp0 sync_exception_current
+
+.balign 0x80
+irq_cur_sp0:
+	current_exception_sp0 irq_current
+
+.balign 0x80
+fiq_cur_sp0:
+	current_exception_sp0 fiq_current
+
+.balign 0x80
+serr_cur_sp0:
+	current_exception_sp0 serr_current
+
+.balign 0x80
+sync_cur_spx:
+	current_exception_spx sync_exception_current
+
+.balign 0x80
+irq_cur_spx:
+	current_exception_spx irq_current
+
+.balign 0x80
+fiq_cur_spx:
+	current_exception_spx fiq_current
+
+.balign 0x80
+serr_cur_spx:
+	current_exception_spx serr_current
+
+.balign 0x80
+sync_lower_64:
+	current_exception_spx sync_lower
+
+.balign 0x80
+irq_lower_64:
+	current_exception_spx irq_lower
+
+.balign 0x80
+fiq_lower_64:
+	current_exception_spx fiq_lower
+
+.balign 0x80
+serr_lower_64:
+	current_exception_spx serr_lower
+
+.balign 0x80
+sync_lower_32:
+	current_exception_spx sync_lower
+
+.balign 0x80
+irq_lower_32:
+	current_exception_spx irq_lower
+
+.balign 0x80
+fiq_lower_32:
+	current_exception_spx fiq_lower
+
+.balign 0x80
+serr_lower_32:
+	current_exception_spx serr_lower
diff --git a/pvmfw/src/exceptions.rs b/pvmfw/src/exceptions.rs
new file mode 100644
index 0000000..2bdcf9c
--- /dev/null
+++ b/pvmfw/src/exceptions.rs
@@ -0,0 +1,81 @@
+// Copyright 2022, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Exception handlers.
+
+use crate::console::emergency_write_str;
+use crate::eprintln;
+use crate::psci::system_reset;
+use core::arch::asm;
+
+#[no_mangle]
+extern "C" fn sync_exception_current() {
+    emergency_write_str("sync_exception_current\n");
+    print_esr();
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn irq_current() {
+    emergency_write_str("irq_current\n");
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn fiq_current() {
+    emergency_write_str("fiq_current\n");
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn serr_current() {
+    emergency_write_str("serr_current\n");
+    print_esr();
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn sync_lower() {
+    emergency_write_str("sync_lower\n");
+    print_esr();
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn irq_lower() {
+    emergency_write_str("irq_lower\n");
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn fiq_lower() {
+    emergency_write_str("fiq_lower\n");
+    system_reset();
+}
+
+#[no_mangle]
+extern "C" fn serr_lower() {
+    emergency_write_str("serr_lower\n");
+    print_esr();
+    system_reset();
+}
+
+#[inline]
+fn print_esr() {
+    let mut esr: u64;
+    unsafe {
+        asm!("mrs {esr}, esr_el1", esr = out(reg) esr);
+    }
+    eprintln!("esr={:#08x}", esr);
+}
diff --git a/pvmfw/src/main.rs b/pvmfw/src/main.rs
index 4ab14b7..d38b1e3 100644
--- a/pvmfw/src/main.rs
+++ b/pvmfw/src/main.rs
@@ -18,6 +18,7 @@
 #![no_std]
 
 mod console;
+mod exceptions;
 mod psci;
 mod uart;