diff options
| author | Alexander Potapenko <glider@google.com> | 2025-11-20 12:10:41 +0100 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2025-11-21 08:57:45 +0000 |
| commit | f7a9f9c4982d10223771d3aa2287538bc08b9024 (patch) | |
| tree | b513cb5eb1cb35cd5bcc88164992bcbaca25dbc6 /sys/linux | |
| parent | 4b88ec680fc3ca03a90835040af2bee0bb6cadaf (diff) | |
executor: sys/linux/test: handle RDTSC in L2
Enable basic RDTSC handling. Ensure that Intel hosts exit on RDTSC
in L2, and that both Intel and AMD can handle RDTSC exits.
Add amd64-syz_kvm_nested_vmresume-rdtsc to test that.
Diffstat (limited to 'sys/linux')
| -rw-r--r-- | sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtsc | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtsc b/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtsc new file mode 100644 index 000000000..3c0e25635 --- /dev/null +++ b/sys/linux/test/amd64-syz_kvm_nested_vmresume-rdtsc @@ -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$x86(r1, &(0x7f0000c00000/0x400000)=nil) + +# Create a nested VM that performs RDTSC (0f 31) and HLT (f4). +# +r3 = syz_kvm_add_vcpu$x86(r2, &AUTO={0x0, &AUTO=[@enable_nested={AUTO, AUTO, 0x0}, @nested_create_vm={AUTO, AUTO, 0x0}, @nested_load_code={AUTO, AUTO, {0x0, "0f31f4"}}, @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 0xe2e20004. +# +ioctl$KVM_RUN(r3, AUTO, 0x0) +syz_kvm_assert_syzos_uexit$x86(r5, 0xe2e20004) + +# 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) |