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| author | Paolo Bonzini | 2017-03-07 12:37:36 +0100 |
|---|---|---|
| committer | Alex Bennée | 2017-03-09 11:41:48 +0100 |
| commit | 10cde894b63146139f981857e4eedf756fa53dcb (patch) | |
| tree | 2d3de35923c5a173450da4615950354e84e1c2db /include/exec | |
| parent | target/mips: hold BQL for timer interrupts (diff) | |
| download | qemu-10cde894b63146139f981857e4eedf756fa53dcb.tar.gz qemu-10cde894b63146139f981857e4eedf756fa53dcb.tar.xz qemu-10cde894b63146139f981857e4eedf756fa53dcb.zip | |
target-i386: defer VMEXIT to do_interrupt
Paths through the softmmu code during code generation now need to be audited
to check for double locking of tb_lock. In particular, VMEXIT can take tb_lock
through cpu_vmexit -> cpu_x86_update_cr4 -> tlb_flush.
To avoid this, split VMEXIT delivery in two parts, similar to what is done with
exceptions. cpu_vmexit only records the VMEXIT exit code and information, and
cc->do_interrupt can then deliver it when it is safe to take the lock.
Reported-by: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Suggested-by: Richard Henderson <rth@twiddle.net>
Tested-by: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/exec')
0 files changed, 0 insertions, 0 deletions