Re: [PATCH 3/3] KVM: SVM: allow to intercept all exceptions for debug

[Borislav Petkov]

On Tue, Mar 16, 2021 at 12:10:20AM +0200, Maxim Levitsky wrote:
> Add a new debug module param 'debug_intercept_exceptions' which will allow the
> KVM to intercept any guest exception, and forward it to the guest.
> 
> This can be very useful for guest debugging and/or KVM debugging with kvm trace.
> This is not intended to be used on production systems.
> 
> This is based on an idea first shown here:
> https://patchwork.kernel.org/project/kvm/patch/20160301192822.GD22677@xxxxxxx/
> 
> CC: Borislav Petkov <bp@xxxxxxx>
> Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>

> ---
>  arch/x86/include/asm/kvm_host.h |  2 +
>  arch/x86/kvm/svm/svm.c          | 77 ++++++++++++++++++++++++++++++++-
>  arch/x86/kvm/svm/svm.h          |  5 ++-
>  arch/x86/kvm/x86.c              |  5 ++-
>  4 files changed, 85 insertions(+), 4 deletions(-)

Looks interesting, I'll give it a try when I get a chance in the coming days.

Thx!

-- 
Regards/Gruss,
    Boris.

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