[Qemu-devel] 答复: [BUG] Windows 7 got stuck easily while run PCMark10 application

["Gonglei (Arei)" <arei.gonglei@huawei.com>]

I also think it's windows bug, the problem is that it doesn't occur on xen platform. And there are some other works need to be done while reading REG_C. So I wrote that patch.

Thanks,
Gonglei
发件人：Paolo Bonzini
收件人：龚磊,张海亮,qemu-devel,Michael S. Tsirkin
抄送：黄伟栋,王欣,谢祥有
时间：2017-12-02 01:10:08
主题:Re: [BUG] Windows 7 got stuck easily while run PCMark10 application

On 01/12/2017 08:08, Gonglei (Arei) wrote:
> First write to 0x70, cmos_index = 0xc & 0x7f = 0xc
>        CPU 0/KVM-15566 kvm_pio: pio_write at 0x70 size 1 count 1 val 0xc> Second write to 0x70, cmos_index = 0x86 & 0x7f = 0x6>        CPU 1/KVM-15567 kvm_pio: pio_write at 0x70 size 1 count 1 val 0x86> vcpu0 read 0x6 because cmos_index is 0x6 now:>        CPU 0/KVM-15566 kvm_pio: pio_read at 0x71 size 1 count 1 val 0x6> vcpu1 read 0x6:>        CPU 1/KVM-15567 kvm_pio: pio_read at 0x71 size 1 count 1 val 0x6
This seems to be a Windows bug.  The easiest workaround that I
can think of is to clear the interrupts already when 0xc is written,
without waiting for the read (because REG_C can only be read).

What do you think?

Thanks,

Paolo