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[Qemu-devel] Re: [PATCH -v6] QEMU: MCE: Add MCE simulation to qemu/tcg
From: |
Huang Ying |
Subject: |
[Qemu-devel] Re: [PATCH -v6] QEMU: MCE: Add MCE simulation to qemu/tcg |
Date: |
Thu, 09 Jul 2009 09:43:58 +0800 |
On Wed, 2009-07-01 at 02:12 +0800, Anthony Liguori wrote:
> Hi Huang,
>
> Huang Ying wrote:
> > - MCE features are initialized when VCPU is intialized according to CPUID.
> > - A monitor command "mce" is added to inject a MCE.
> > - A new interrupt mask: CPU_INTERRUPT_MCE is added to inject the MCE.
> >
>
> Can you post some instructions on how to test this functionality?
During development, I use QEMU monitor command "mce" to test this
functionality. For corrected error, you can use /sbin/mcelog to get the
error information. For uncorrected error, you will get panic. If you
want to get result faster for corrected error, set the following sysfs
file to a small number, which is seconds between corrected error polls.
/sys/devices/system/machinecheck/machinecheck0/check_interval
For corrected error:
mce 0 1 0x8000000000000000 0x0 0x0 0x0
For uncorrected error:
mce 0 1 0xb200000000000000 0x0 0x0 0x0
> For
> instance, I believe Linux is capable of delivering a SIGBUS to a process
> based on certain MCE's. I'm not sure what the steps would be though to
> create a process using a particular physical memory address, generate a
> MCE for that address, and then inspect that the process received the signal.
>
> Are you testing the patches via something like that?
It is possible to test like that, but I think it is much easier to test
the case I mentioned above.
Best Regards,
Huang Ying