Re: [PATCH 2/2] KVM: SVM: Enable Virtual GIF feature

2017-08-16 Thread Paolo Bonzini
Tony Luck" > , "Borislav Petkov" > , "Thomas Gleixner" , "Ingo Molnar" > , "H . Peter Anvin" > , "Yazen Ghannam" > Sent: Thursday, August 17, 2017 12:04:10 AM > Subject: Re: [PATCH 2/2] KVM: SVM: Enable Virtual GIF feature >

Re: [PATCH 2/2] KVM: SVM: Enable Virtual GIF feature

2017-08-16 Thread Natarajan, Janakarajan
On 8/16/2017 2:53 PM, Radim Krcmar wrote: 2017-08-16 10:54-0500, Janakarajan Natarajan: Enable the Virtual GIF feature. This is done by setting bit 25 at position 60h in the vmcb. With this feature enabled, the processor uses bit 9 at position 60h as the virtual GIF when executing STGI/CLGI ins

Re: [PATCH 2/2] KVM: SVM: Enable Virtual GIF feature

2017-08-16 Thread Radim Krcmar
2017-08-16 10:54-0500, Janakarajan Natarajan: > Enable the Virtual GIF feature. This is done by setting bit 25 at position > 60h in the vmcb. > > With this feature enabled, the processor uses bit 9 at position 60h as the > virtual GIF when executing STGI/CLGI instructions. > > Since the execution

[PATCH 2/2] KVM: SVM: Enable Virtual GIF feature

2017-08-16 Thread Janakarajan Natarajan
Enable the Virtual GIF feature. This is done by setting bit 25 at position 60h in the vmcb. With this feature enabled, the processor uses bit 9 at position 60h as the virtual GIF when executing STGI/CLGI instructions. Since the execution of STGI by the L1 hypervisor does not cause a return to the