> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 08 March 2019 16:43
> To: Paul Durrant
> Cc: Andrew Cooper ; Roger Pau Monne
> ; Wei Liu
> ; Jun Nakajima ; Kevin Tian
> ; xen-
> devel
> Subject: Re: [PATCH 2/6] x86: save GUEST_BNDCFGS on context switch...
>
>>> On 07.01.19 at 13:02, wrote:
> ...to avoid the need for a VMCS reload when the value of MSR_IA32_BNDCFGS is
> read by the tool-stack.
Is this a good trade-off? I.e. are tool stack reads at least as frequent as
context switches?
Jan
___
> -Original Message-
> From: Tian, Kevin [mailto:kevin.t...@intel.com]
> Sent: 28 January 2019 02:34
> To: Paul Durrant ; xen-devel@lists.xenproject.org
> Cc: Jan Beulich ; Andrew Cooper
> ; Wei Liu ; Roger Pau
> Monne ; Nakajima, Jun
> Subject: RE: [PATCH 2/6] x86: save GUEST_BNDCFGS on
> From: Paul Durrant [mailto:paul.durr...@citrix.com]
> Sent: Monday, January 7, 2019 8:03 PM
>
> ...to avoid the need for a VMCS reload when the value of
> MSR_IA32_BNDCFGS is
> read by the tool-stack.
the frequency of context switch is much higher than the
one of reading by tool-stack (at
...to avoid the need for a VMCS reload when the value of MSR_IA32_BNDCFGS is
read by the tool-stack.
Signed-off-by: Paul Durrant
---
Cc: Jan Beulich
Cc: Andrew Cooper
Cc: Wei Liu
Cc: "Roger Pau Monné"
Cc: Jun Nakajima
Cc: Kevin Tian
---
xen/arch/x86/hvm/hvm.c | 18 +++---
