[Xen-devel] hi, all. how can I write msr while in domain0? thanks in advance:)

[danielsong <sjtusongyi@xxxxxxxxx>]

I want to write 0x2a msr(concerning power-on configuration);

currently I rebuild the kernel adding support for /dev/cpu/msr0.

so I just access the file through the file.

 

the problem is that:It seems that I can't write a value into the 0x2a msr(also 0x10-tsc msr).

 

after searching in xensource web, I found that we can modify the emulate_privileged_op() in xen/arch/x86/traps.c

but when add a printk sentence at the beginning of the emulate_privileged_op()

I didn't get the output using dmesg | tail.

 

it seems that the wrmsr didn't get into the emulate_privileged_op() ?

the rdmsr operation is the same as wrmsr:-)

 

 

thank you.

 

--
Best Regrads,
DanielSong

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