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| author |   Andy Lutomirski <luto@kernel.org> | 2019-07-01 20:43:19 -0700 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-07-02 08:45:20 +0200 |
| commit | 9402eaf4c11f0b892eda7b2bcb4654ab34ce34f9 (patch) | |
| tree | 5b392bddeac59062107c2e2adacaf80fc514bc66 /tools/testing/selftests/x86/ioperm.c | |
| parent | x86/mtrr: Skip cache flushes on CPUs with cache self-snooping (diff) | |
| download | wireguard-linux-9402eaf4c11f0b892eda7b2bcb4654ab34ce34f9.tar.xz wireguard-linux-9402eaf4c11f0b892eda7b2bcb4654ab34ce34f9.zip | |
selftests/x86: Test SYSCALL and SYSENTER manually with TF set
Make sure that both variants of the nasty TF-in-compat-syscall are
exercised regardless of what vendor's CPU is running the tests.
Also change the intentional signal after SYSCALL to use ud2, which
is a lot more comprehensible.
This crashes the kernel due to an FSGSBASE bug right now.
This test *also* detects a bug in KVM when run on an Intel host. KVM
people, feel free to use it to help debug. There's a bunch of code in this
test to warn instead of going into an infinite looping when the bug gets
triggered.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "BaeChang Seok" <chang.seok.bae@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Cc: "Bae, Chang Seok" <chang.seok.bae@intel.com>
Link: https://lkml.kernel.org/r/5f5de10441ab2e3005538b4c33be9b1965d1bb63.1562035429.git.luto@kernel.org
Diffstat (limited to 'tools/testing/selftests/x86/ioperm.c')
0 files changed, 0 insertions, 0 deletions