diff --git a/libc/kernel/uapi/asm-x86/asm/bootparam.h b/libc/kernel/uapi/asm-x86/asm/bootparam.h
index b010277..dc90f57 100644
--- a/libc/kernel/uapi/asm-x86/asm/bootparam.h
+++ b/libc/kernel/uapi/asm-x86/asm/bootparam.h
@@ -135,7 +135,8 @@
   __u8 _pad2[4];
   __u64 tboot_addr;
   struct ist_info ist_info;
-  __u8 _pad3[16];
+  __u64 acpi_rsdp_addr;
+  __u8 _pad3[8];
   __u8 hd0_info[16];
   __u8 hd1_info[16];
   struct sys_desc_table sys_desc_table;
diff --git a/libc/kernel/uapi/asm-x86/asm/kvm.h b/libc/kernel/uapi/asm-x86/asm/kvm.h
index 1d7f767..4386f76 100644
--- a/libc/kernel/uapi/asm-x86/asm/kvm.h
+++ b/libc/kernel/uapi/asm-x86/asm/kvm.h
@@ -248,6 +248,7 @@
 #define KVM_VCPUEVENT_VALID_SIPI_VECTOR 0x00000002
 #define KVM_VCPUEVENT_VALID_SHADOW 0x00000004
 #define KVM_VCPUEVENT_VALID_SMM 0x00000008
+#define KVM_VCPUEVENT_VALID_PAYLOAD 0x00000010
 #define KVM_X86_SHADOW_INT_MOV_SS 0x01
 #define KVM_X86_SHADOW_INT_STI 0x02
 struct kvm_vcpu_events {
@@ -255,7 +256,7 @@
     __u8 injected;
     __u8 nr;
     __u8 has_error_code;
-    __u8 pad;
+    __u8 pending;
     __u32 error_code;
   } exception;
   struct {
@@ -278,7 +279,9 @@
     __u8 smm_inside_nmi;
     __u8 latched_init;
   } smi;
-  __u32 reserved[9];
+  __u8 reserved[27];
+  __u8 exception_has_payload;
+  __u64 exception_payload;
 };
 struct kvm_debugregs {
   __u64 db[4];
@@ -316,6 +319,7 @@
 #define KVM_X86_QUIRK_LAPIC_MMIO_HOLE (1 << 2)
 #define KVM_STATE_NESTED_GUEST_MODE 0x00000001
 #define KVM_STATE_NESTED_RUN_PENDING 0x00000002
+#define KVM_STATE_NESTED_EVMCS 0x00000004
 #define KVM_STATE_NESTED_SMM_GUEST_MODE 0x00000001
 #define KVM_STATE_NESTED_SMM_VMXON 0x00000002
 struct kvm_vmx_nested_state {
diff --git a/libc/kernel/uapi/asm-x86/asm/siginfo.h b/libc/kernel/uapi/asm-x86/asm/siginfo.h
index 1da8066..0de5283 100644
--- a/libc/kernel/uapi/asm-x86/asm/siginfo.h
+++ b/libc/kernel/uapi/asm-x86/asm/siginfo.h
@@ -23,8 +23,6 @@
 typedef long long __kernel_si_clock_t __attribute__((aligned(4)));
 #define __ARCH_SI_CLOCK_T __kernel_si_clock_t
 #define __ARCH_SI_ATTRIBUTES __attribute__((aligned(8)))
-#else
-#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
 #endif
 #endif
 #include <asm-generic/siginfo.h>