On 31/03/2017 10:58, Alex Bennée wrote: > > Igor Mammedov <imamm...@redhat.com> writes: > >> On Thu, 30 Mar 2017 16:05:58 +0100 >> Alex Bennée <alex.ben...@linaro.org> wrote: >> >>> Igor Mammedov <imamm...@redhat.com> writes: >>> >>>> (PS: resend due to wrong qemu-devel mail list address in original >>>> email) >>> >>> Le *sigh* another way of x86 generating IRQs ;-) >>> >>> Could you test this please? >>> >>> target/i386/misc_helper: wrap BQL around another IRQ generator >>> >>> Anything that calls into HW emulation must be protected by the BQL. >>> >>> Signed-off-by: Alex Bennée <alex.ben...@linaro.org> >> it doesn't help, >> it asserts in the same place anyway > > That's weird. If the lock was already held I could see it failing higher > up but this seems to imply we are dropping a lock as we descend into > hardware emulation.
Seems weird to me too. > How often does this leg of the helper get called? Continuously under Windows, never on Linux. But you can also try kvm-unit-tests probably to trigger it: $ qemu-system-x86_64 \ -kernel x86/vmexit.flat -serial stdio \ --append 'cpuid mov_to_cr8' -device isa-debug-exit,iobase=0xf4 Thanks, paolo
