From 67c375600e44473aafff4ce6ff7abb90e4f4fff4 Mon Sep 17 00:00:00 2001
From: Alexander Potapenko <glider@google.com>
Date: Thu, 18 Sep 2025 17:34:09 +0200
Subject: sys/linux/test: add amd64-syz_kvm_setup_syzos_vm-hlt

The new test validates that KVM exits with KVM_EXIT_HLT when
encountering the x86 HLT instruction.
---
 sys/linux/test/amd64-syz_kvm_setup_syzos_vm-hlt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 sys/linux/test/amd64-syz_kvm_setup_syzos_vm-hlt

(limited to 'sys/linux/test')

diff --git a/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-hlt b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-hlt
new file mode 100644
index 000000000..1a416ce4e
--- /dev/null
+++ b/sys/linux/test/amd64-syz_kvm_setup_syzos_vm-hlt
@@ -0,0 +1,17 @@
+#
+# requires: arch=amd64 -threaded
+#
+r0 = openat$kvm(0, &AUTO='/dev/kvm\x00', 0x0, 0x0)
+r1 = ioctl$KVM_CREATE_VM(r0, AUTO, 0x0)
+r2 = syz_kvm_setup_syzos_vm$x86(r1, &(0x7f0000c00000/0x400000)=nil)
+
+# 0xf4 is the HLT instruction.
+#
+r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@code={AUTO, AUTO, {"f4", 0x1}}], AUTO})
+r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO)
+r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0)
+
+# KVM_RUN should exit with KVM_EXIT_HLT = 0x5.
+#
+ioctl$KVM_RUN(r3, AUTO, 0x0)
+syz_kvm_assert_syzos_kvm_exit$x86(r5, 0x5)
-- 
cgit mrf-deployment