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Re: [Qemu-devel] [BUG] Windows 7 got stuck easily while run PCMark10 app
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [BUG] Windows 7 got stuck easily while run PCMark10 application |
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Date: |
Fri, 1 Dec 2017 18:09:52 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 |
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