[v1][KVM][PATCH 1/1] kvm:ppc:booehv: direct ISI exception to Guest

Scott Wood scottwood at freescale.com
Wed May 8 09:40:43 EST 2013


On 05/07/2013 06:06:30 AM, Tiejun Chen wrote:
> We also can direct ISI exception to Guest like DSI.
> 
> Signed-off-by: Tiejun Chen <tiejun.chen at windriver.com>
> ---
>  arch/powerpc/kvm/booke_emulate.c |    3 +++
>  arch/powerpc/kvm/e500mc.c        |    3 ++-
>  2 files changed, 5 insertions(+), 1 deletion(-)

Are you seeing a real performance improvement from this?  This will  
interfere somewhat with using the VF bit, if we were to ever do so,  
since VF only affects data accesses (and so the guest would see an ISI  
storm rather than a machine check if it tries to execute from such an  
address).

-Scott


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