[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] x86/VPMU: Check more carefully which bits are allowed to be written to MSRs

On 12/23/2015 12:21 AM, Tian, Kevin wrote:
From: Boris Ostrovsky [mailto:boris.ostrovsky@xxxxxxxxxx]
Sent: Wednesday, December 23, 2015 12:25 AM

Current Intel VPMU emulation needs to perform more checks when writing
PMU MSRs on guest's behalf:
* MSR_CORE_PERF_GLOBAL_CTRL is not checked at all
* MSR_CORE_PERF_FIXED_CTR_CTRL has more reserved bits in PMU version 2
* MSR_CORE_PERF_GLOBAL_OVF_CTRL's bit 61 is allowed on versions greater
* than 2.

We can also use precomputed mask in core2_vpmu_do_interrupt().

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>

I think I missed one more register. Let me send another version.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.