Re: [PATCH V4 5/5] xen: Handle resumed instruction based on previous mem_event reply

["Jan Beulich" <JBeulich@suse.com>]

>>> On 05.09.14 at 12:01, <rcojocaru@bitdefender.com> wrote:
> --- a/xen/arch/x86/hvm/vmx/vmx.c
> +++ b/xen/arch/x86/hvm/vmx/vmx.c
> @@ -1695,6 +1695,21 @@ static void vmx_enable_msr_exit_interception(struct domain *d)
>                                           MSR_TYPE_W);
>  }
>  
> +static bool_t vmx_exited_by_nested_pagefault(void)
> +{
> +    unsigned long exit_qualification, exit_reason;
> +
> +    __vmread(VM_EXIT_REASON, &exit_reason);
> +    ASSERT(exit_reason == EXIT_REASON_EPT_VIOLATION);
> +
> +    __vmread(EXIT_QUALIFICATION, &exit_qualification);
> +
> +    if ( (exit_qualification & EPT_GLA_FAULT) == 0 )
> +        return 0;
> +
> +    return 1;
> +}

So I said a number of times that I think this new function can go
away with the recent changes introducing struct npfec, making
the interesting bit of information already available to
p2m_mem_access_check() if I'm not mistaken. And the previous
excuse of that code not being committed yet is no longer valid.

Jan