Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-14 Thread Gleb Natapov
On Tue, Feb 14, 2012 at 09:55:46AM +0100, Jan Kiszka wrote: > On 2012-02-14 08:54, Gleb Natapov wrote: > > On Mon, Feb 13, 2012 at 08:22:21PM +0100, Jan Kiszka wrote: > Unfortunately, this is only an internal structure, not officially > documented by MS. However, all supported OS versions

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-14 Thread Jan Kiszka
On 2012-02-14 08:54, Gleb Natapov wrote: > On Mon, Feb 13, 2012 at 08:22:21PM +0100, Jan Kiszka wrote: Unfortunately, this is only an internal structure, not officially documented by MS. However, all supported OS versions a legacy by now, no longer changing its structure. >>> >>> Thi

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-13 Thread Gleb Natapov
On Mon, Feb 13, 2012 at 08:22:21PM +0100, Jan Kiszka wrote: > >> Unfortunately, this is only an internal structure, not officially > >> documented by MS. However, all supported OS versions a legacy by now, no > >> longer changing its structure. > > > > This and a note about the supported OS versio

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-13 Thread Jan Kiszka
On 2012-02-13 19:50, Blue Swirl wrote: > On Mon, Feb 13, 2012 at 10:16, Jan Kiszka wrote: >> On 2012-02-11 16:25, Blue Swirl wrote: >>> On Fri, Feb 10, 2012 at 18:31, Jan Kiszka wrote: This enables acceleration for MMIO-based TPR registers accesses of 32-bit Windows guest systems. It is

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-13 Thread Gleb Natapov
On Mon, Feb 13, 2012 at 06:50:08PM +, Blue Swirl wrote: > On Mon, Feb 13, 2012 at 10:16, Jan Kiszka wrote: > > On 2012-02-11 16:25, Blue Swirl wrote: > >> On Fri, Feb 10, 2012 at 18:31, Jan Kiszka wrote: > >>> This enables acceleration for MMIO-based TPR registers accesses of > >>> 32-bit Win

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-13 Thread Blue Swirl
On Mon, Feb 13, 2012 at 10:16, Jan Kiszka wrote: > On 2012-02-11 16:25, Blue Swirl wrote: >> On Fri, Feb 10, 2012 at 18:31, Jan Kiszka wrote: >>> This enables acceleration for MMIO-based TPR registers accesses of >>> 32-bit Windows guest systems. It is mostly useful with KVM enabled, >>> either o

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-13 Thread Jan Kiszka
On 2012-02-11 16:25, Blue Swirl wrote: > On Fri, Feb 10, 2012 at 18:31, Jan Kiszka wrote: >> This enables acceleration for MMIO-based TPR registers accesses of >> 32-bit Windows guest systems. It is mostly useful with KVM enabled, >> either on older Intel CPUs (without flexpriority feature, can al

Re: [Qemu-devel] [PATCH v2 5/8] kvmvapic: Introduce TPR access optimization for Windows guests

2012-02-11 Thread Blue Swirl
On Fri, Feb 10, 2012 at 18:31, Jan Kiszka wrote: > This enables acceleration for MMIO-based TPR registers accesses of > 32-bit Windows guest systems. It is mostly useful with KVM enabled, > either on older Intel CPUs (without flexpriority feature, can also be > manually disabled for testing) or an