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| author | James Hogan <james.hogan@imgtec.com> | 2015-02-06 16:03:57 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2015-03-27 21:25:07 +0000 |
| commit | 0a5604272d80c985f87de959f0bb7e36fd53d3c7 (patch) | |
| tree | 391bbee989a6ab6ab22d7b4b32a0b7850602d5be /arch/mips/kvm/stats.c | |
| parent | 64bedffe496820dbb6b53302d80dd0f04db33d8e (diff) | |
| download | linux-0a5604272d80c985f87de959f0bb7e36fd53d3c7.tar.gz linux-0a5604272d80c985f87de959f0bb7e36fd53d3c7.tar.bz2 linux-0a5604272d80c985f87de959f0bb7e36fd53d3c7.zip | |
MIPS: KVM: Handle TRAP exceptions from guest kernel
Trap instructions are used by Linux to implement BUG_ON(), however KVM
doesn't pass trap exceptions on to the guest if they occur in guest
kernel mode, instead triggering an internal error "Exception Code: 13,
not yet handled". The guest kernel then doesn't get a chance to print
the usual BUG message and stack trace.
Implement handling of the trap exception so that it gets passed to the
guest and the user is left with a more useful log message.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/kvm/stats.c')
| -rw-r--r-- | arch/mips/kvm/stats.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/kvm/stats.c b/arch/mips/kvm/stats.c index a74d6024c5ad..dd90b0a92181 100644 --- a/arch/mips/kvm/stats.c +++ b/arch/mips/kvm/stats.c @@ -25,6 +25,7 @@ char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES] = { "System Call", "Reserved Inst", "Break Inst", + "Trap Inst", "D-Cache Flushes", }; |