Re: [PATCH RFC V4 5/5] Documentation/kvm : Add documentation on Hypercalls and features used for PV spinlock

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


* Gleb Natapov <gleb@xxxxxxxxxx> [2012-01-17 11:14:13]:

> > The problem case I was thinking of was when guest VCPU would have issued
> > HLT with interrupts disabled. I guess one option is to inject an NMI,
> > and have the guest kernel NMI handler recognize this and make
> > adjustments such that the vcpu avoids going back to HLT instruction.
> > 
> Just kick vcpu out of a guest mode and adjust rip to point after HLT on
> next re-entry. Don't forget to call vmx_clear_hlt().

Looks bit hackish to me compared to having another hypercall to yield!

> > Having another hypercall to do yield/sleep (rather than effecting that
> > via HLT) seems like an alternate clean solution here ..

- vatsa

_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization


[KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Photo]     [Yosemite]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]     [Find Someone Nice]     [Video 4 Linux]     [Linux Resources]
Add to Google Powered by Linux