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| author | Alexander Potapenko <glider@google.com> | 2025-11-20 18:49:26 +0100 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2025-11-21 08:57:45 +0000 |
| commit | 4d2a94c0154cc97761c0161d5c259ec04f05c7bd (patch) | |
| tree | 9609a39f250e1dc99c1b4f91a1a92aa583f5dd5c /sys | |
| parent | 880e0a0225f6667373f85f9dfa78b5d9fb6e29e2 (diff) | |
executor: sys/linux/test: handle RDTSCP in L2
Enable basic RDTSCP handling. Ensure that Intel hosts exit on RDTSCP
in L2, and that both Intel and AMD can handle RDTSCP exits.
Add amd64-syz_kvm_nested_vmresume-rdtscp to test that.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtscp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtscp b/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtscp new file mode 100644 index 000000000..0ccff3425 --- /dev/null +++ b/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtscp @@ -0,0 +1,27 @@ +# +# 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$x86(r1, &(0x7f0000c00000/0x400000)=nil) + +# Create a nested VM that performs RDTSCP (0f 01 f9) and HLT (f4). +# +r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@enable_nested={AUTO, AUTO, 0x0}, @nested_create_vm={AUTO, AUTO, 0x0}, @nested_load_code={AUTO, AUTO, {0x0, "0f01f9f4"}}, @nested_vmlaunch={AUTO, AUTO, 0x0}, @nested_vmresume={AUTO, AUTO, 0x0}], AUTO}) +r4 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO) +r5 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r4, 0x3, 0x1, r3, 0x0) + +# L2 VM executes CPUID. Exit reason is mapped to 0xe2e20005. +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r5, 0xe2e20005) + +# L1 resumes L2, which executes HLT. Exit reason is mapped to 0xe2e20001. +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r5, 0xe2e20001) + +# guest_main should finish with guest_uexit(-1). +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r5, 0xffffffff) |