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Re: [Qemu-devel] qemu-2.9 crashes in tcg_handle_interrupt() during winx6
Re: [Qemu-devel] qemu-2.9 crashes in tcg_handle_interrupt() during winx64 boot
Fri, 31 Mar 2017 14:08:28 +0200
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0
On 31/03/2017 10:58, Alex Bennée wrote:
> Igor Mammedov <address@hidden> writes:
>> On Thu, 30 Mar 2017 16:05:58 +0100
>> Alex Bennée <address@hidden> wrote:
>>> Igor Mammedov <address@hidden> writes:
>>>> (PS: resend due to wrong qemu-devel mail list address in original
>>> 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 <address@hidden>
>> 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