Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-22 Thread Yang Zhong
On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: > On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > > From: Yang Zhong > > > > Kernel allocates 4K xstate buffer by default. For XSAVE features > > which require large state component (e.g. AMX), Linux kernel > > dynamical

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-18 Thread Yang Zhong
On Fri, Mar 18, 2022 at 11:13:56AM +0100, Michal Prívozník wrote: > On 3/16/22 16:57, Peter Krempa wrote: > > On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > >> From: Yang Zhong > >> > >> Kernel allocates 4K xstate buffer by default. For XSAVE features > >> which require large state

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-18 Thread Michal Prívozník
On 3/16/22 16:57, Peter Krempa wrote: > On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: >> From: Yang Zhong >> >> Kernel allocates 4K xstate buffer by default. For XSAVE features >> which require large state component (e.g. AMX), Linux kernel >> dynamically expands the xstate buffer o

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-17 Thread Maxim Levitsky
On Wed, 2022-03-16 at 17:50 +, Daniel P. Berrangé wrote: > On Wed, Mar 16, 2022 at 05:48:04PM +, David Edmondson wrote: > > On Wednesday, 2022-03-16 at 16:05:01 GMT, Daniel P. Berrangé wrote: > > > > > On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: > > > > On Tue, Mar 08, 20

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread Yang Zhong
On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: > On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > > From: Yang Zhong > > > > Kernel allocates 4K xstate buffer by default. For XSAVE features > > which require large state component (e.g. AMX), Linux kernel > > dynamical

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread Daniel P . Berrangé
On Wed, Mar 16, 2022 at 05:48:04PM +, David Edmondson wrote: > On Wednesday, 2022-03-16 at 16:05:01 GMT, Daniel P. Berrangé wrote: > > > On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: > >> On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > >> > From: Yang Zhong > >>

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread David Edmondson
On Wednesday, 2022-03-16 at 16:05:01 GMT, Daniel P. Berrangé wrote: > On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: >> On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: >> > From: Yang Zhong >> > >> > Kernel allocates 4K xstate buffer by default. For XSAVE features >>

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread Paolo Bonzini
On 3/16/22 17:05, Daniel P. Berrangé wrote: On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: From: Yang Zhong Kernel allocates 4K xstate buffer by default. For XSAVE features which require large state component (e.g. AM

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread Daniel P . Berrangé
On Wed, Mar 16, 2022 at 04:57:39PM +0100, Peter Krempa wrote: > On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > > From: Yang Zhong > > > > Kernel allocates 4K xstate buffer by default. For XSAVE features > > which require large state component (e.g. AMX), Linux kernel > > dynamical

Re: [PULL 15/22] x86: Grant AMX permission for guest

2022-03-16 Thread Peter Krempa
On Tue, Mar 08, 2022 at 12:34:38 +0100, Paolo Bonzini wrote: > From: Yang Zhong > > Kernel allocates 4K xstate buffer by default. For XSAVE features > which require large state component (e.g. AMX), Linux kernel > dynamically expands the xstate buffer only after the process has > acquired the nec