Re: [RFC v2 PATCH 7/7] arm64: KVM: Enable selective trapping of TLB instructions

2016-09-06 Thread Punit Agrawal
Christoffer Dall writes: > On Mon, Sep 05, 2016 at 05:31:37PM +0100, Punit Agrawal wrote: >> The TTLB bit of Hypervisor Control Register (HCR_EL2) controls the >> trapping of guest TLB maintenance instructions. Taking the trap requires >> a switch to the hypervisor and is an expensive operation.

Re: [RFC v2 PATCH 7/7] arm64: KVM: Enable selective trapping of TLB instructions

2016-09-06 Thread Christoffer Dall
On Mon, Sep 05, 2016 at 05:31:37PM +0100, Punit Agrawal wrote: > The TTLB bit of Hypervisor Control Register (HCR_EL2) controls the > trapping of guest TLB maintenance instructions. Taking the trap requires > a switch to the hypervisor and is an expensive operation. > > Enable selective trapping o