Re: [Xen-devel] [PATCH 2/5] xen: Optimize introspection access to guest state

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 09/03/2014 10:44 AM, Razvan Cojocaru wrote:
> Speed optimization for introspection purposes: a handful of registers
> are sent along with each mem_event. This requires enlargement of the
> mem_event_request / mem_event_response stuctures, and additional code
> to fill in relevant values. Since the EPT event processing code needs
> more data than CR3 or MSR event processors, hvm_mem_event_fill_regs()
> fills in less data than p2m_mem_event_fill_regs(), in order to avoid
> overhead. Struct hvm_hw_cpu has been considered instead of the custom
> struct mem_event_regs_st, but its size would cause quick filling up
> of the mem_event ring buffer.
> 
> Signed-off-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
>  tools/libxc/xc_mem_access.c        |   10 +++++++++-
>  tools/libxc/xc_mem_event.c         |    7 +++++--
>  tools/libxc/xc_private.h           |    2 +-
>  tools/libxc/xenctrl.h              |    2 ++
>  xen/arch/x86/hvm/vmx/vmcs.c        |   25 +++++++++++++++++++++++++
>  xen/arch/x86/hvm/vmx/vmx.c         |   13 +++++++++++++
>  xen/arch/x86/mm/mem_event.c        |   11 +++++++++++
>  xen/include/asm-x86/hvm/domain.h   |    1 +
>  xen/include/asm-x86/hvm/hvm.h      |    2 ++
>  xen/include/asm-x86/hvm/vmx/vmcs.h |    7 +++++++
>  xen/include/public/domctl.h        |    7 ++++---
>  11 files changed, 80 insertions(+), 7 deletions(-)

Sorry, I've managed to switch the description of patches 2 and 3. I'll
send V2 shortly with the correction.


Thanks,
Razvan Cojocaru

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