diff --git a/libc/kernel/uapi/asm-arm64/asm/hwcap.h b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
index bb592e4..3ec1354 100644
--- a/libc/kernel/uapi/asm-arm64/asm/hwcap.h
+++ b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
@@ -87,4 +87,10 @@
 #define HWCAP2_CSSC (1UL << 34)
 #define HWCAP2_RPRFM (1UL << 35)
 #define HWCAP2_SVE2P1 (1UL << 36)
+#define HWCAP2_SME2 (1UL << 37)
+#define HWCAP2_SME2P1 (1UL << 38)
+#define HWCAP2_SME_I16I32 (1UL << 39)
+#define HWCAP2_SME_BI32I32 (1UL << 40)
+#define HWCAP2_SME_B16B16 (1UL << 41)
+#define HWCAP2_SME_F16F16 (1UL << 42)
 #endif
diff --git a/libc/kernel/uapi/asm-arm64/asm/kvm.h b/libc/kernel/uapi/asm-arm64/asm/kvm.h
index ce0c318..a413b36 100644
--- a/libc/kernel/uapi/asm-arm64/asm/kvm.h
+++ b/libc/kernel/uapi/asm-arm64/asm/kvm.h
@@ -74,6 +74,7 @@
 #define KVM_ARM_VCPU_SVE 4
 #define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5
 #define KVM_ARM_VCPU_PTRAUTH_GENERIC 6
+#define KVM_ARM_VCPU_HAS_EL2 7
 struct kvm_vcpu_init {
   __u32 target;
   __u32 features[7];
diff --git a/libc/kernel/uapi/asm-arm64/asm/sigcontext.h b/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
index 04aa593..84cd16d 100644
--- a/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
+++ b/libc/kernel/uapi/asm-arm64/asm/sigcontext.h
@@ -59,12 +59,23 @@
   __u16 __reserved[2];
 };
 #define SVE_SIG_FLAG_SM 0x1
+#define TPIDR2_MAGIC 0x54504902
+struct tpidr2_context {
+  struct _aarch64_ctx head;
+  __u64 tpidr2;
+};
 #define ZA_MAGIC 0x54366345
 struct za_context {
   struct _aarch64_ctx head;
   __u16 vl;
   __u16 __reserved[3];
 };
+#define ZT_MAGIC 0x5a544e01
+struct zt_context {
+  struct _aarch64_ctx head;
+  __u16 nregs;
+  __u16 __reserved[3];
+};
 #endif
 #include <asm/sve_context.h>
 #define SVE_VQ_BYTES __SVE_VQ_BYTES
@@ -94,4 +105,9 @@
 #define ZA_SIG_REGS_SIZE(vq) ((vq * __SVE_VQ_BYTES) * (vq * __SVE_VQ_BYTES))
 #define ZA_SIG_ZAV_OFFSET(vq,n) (ZA_SIG_REGS_OFFSET + (SVE_SIG_ZREG_SIZE(vq) * n))
 #define ZA_SIG_CONTEXT_SIZE(vq) (ZA_SIG_REGS_OFFSET + ZA_SIG_REGS_SIZE(vq))
+#define ZT_SIG_REG_SIZE 512
+#define ZT_SIG_REG_BYTES (ZT_SIG_REG_SIZE / 8)
+#define ZT_SIG_REGS_OFFSET sizeof(struct zt_context)
+#define ZT_SIG_REGS_SIZE(n) (ZT_SIG_REG_BYTES * n)
+#define ZT_SIG_CONTEXT_SIZE(n) (sizeof(struct zt_context) + ZT_SIG_REGS_SIZE(n))
 #endif