diff options
| author | Alexey Kardashevskiy <aik@linux.ibm.com> | 2021-07-14 15:19:57 +1000 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2021-07-19 11:29:36 +0200 |
| commit | e00224d9ff393517c827e5e827f7638a9eaff812 (patch) | |
| tree | 67c9a5e343b45db9f5ebb252ebaee157e54bbf6e /sys/linux | |
| parent | 5044cb7c5d2dddf1e93b895e800cd64b100a8e18 (diff) | |
executor/common_kvm_ppc64: fix KVM support
Turns out the ifuzz on powerpc did not ever properly work. This fixes
syz_kvm_setup_cpu$ppc64:
Enable the PAPR KVM capability (otherwise KVM_RUN fails right away).
Finish generated sequences with the software debug breakpoint as
there is no x86's "hlt" variant on POWER and otherwise KVM won't exit.
Add exception handlers, use the software debug breakpoint instruction
to trigger immediate exit from KVM with the only exception of
the decrementer interrupt handler (timer) to recharge the timer and
continue.
Define and use endianness selection flag (Big vs. Little endian).
Define the code generator similar to kvm_gen.cc which for now contains
2 simple tests and the decrementer interrupt handler code.
Add test cases to the executor so "bin/linux_ppc64le/syz-executor test"
can run some sensible tests. The tests copy 0xbadc0de around similar
to x86 and uses gpr[3] is a return value register (similar to EAX).
Signed-off-by: Alexey Kardashevskiy <aik@linux.ibm.com>
Diffstat (limited to 'sys/linux')
| -rw-r--r-- | sys/linux/dev_kvm.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/linux/dev_kvm.txt b/sys/linux/dev_kvm.txt index 78615a8b6..59b4b787a 100644 --- a/sys/linux/dev_kvm.txt +++ b/sys/linux/dev_kvm.txt @@ -157,7 +157,7 @@ kvm_x86_rflags = 1, 2, 4, 16, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, # The interface is designed for extensibility so that addition of new options does not invalidate all existing programs. syz_kvm_setup_cpu$x86(fd fd_kvmvm, cpufd fd_kvmcpu, usermem vma[24], text ptr[in, array[kvm_text_x86, 1]], ntext len[text], flags flags[kvm_setup_flags], opts ptr[in, array[kvm_setup_opt_x86, 0:2]], nopt len[opts]) syz_kvm_setup_cpu$arm64(fd fd_kvmvm, cpufd fd_kvmcpu, usermem vma[24], text ptr[in, array[kvm_text_arm64, 1]], ntext len[text], flags const[0], opts ptr[in, array[kvm_setup_opt_arm64, 1]], nopt len[opts]) -syz_kvm_setup_cpu$ppc64(fd fd_kvmvm, cpufd fd_kvmcpu, usermem vma[24], text ptr[in, array[kvm_text_ppc64, 1]], ntext len[text], flags const[0], opts ptr[in, array[kvm_setup_opt_ppc64, 1]], nopt len[opts]) +syz_kvm_setup_cpu$ppc64(fd fd_kvmvm, cpufd fd_kvmcpu, usermem vma[24], text ptr[in, array[kvm_text_ppc64, 1]], ntext len[text], flags flags[kvm_setup_flags_ppc64], opts ptr[in, array[kvm_setup_opt_ppc64, 1]], nopt len[opts]) kvm_text_x86 [ textreal kvm_text_x86_real @@ -299,6 +299,10 @@ define KVM_SETUP_VIRT86 (1<<4) define KVM_SETUP_SMM (1<<5) define KVM_SETUP_VM (1<<6) +kvm_setup_flags_ppc64 = KVM_SETUP_PPC64_LE + +define KVM_SETUP_PPC64_LE (1<<0) # Little endian + kvm_guest_debug { ctrl flags[kvm_guest_debug_flags, int32] pad const[0, int32] |