On 15/04/15 08:03, Kai Huang wrote:
> A top level EPT parameter "ept=<options>" and a sub boolean "opt_pml_enabled"
> are added to control PML. Other booleans can be further added for any other
> EPT
> related features.
>
> Signed-off-by: Kai Huang <kai.hu...@linux.intel.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
> ---
> xen/arch/x86/hvm/vmx/vmcs.c | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
> index d614638..4fff46d 100644
> --- a/xen/arch/x86/hvm/vmx/vmcs.c
> +++ b/xen/arch/x86/hvm/vmx/vmcs.c
> @@ -64,6 +64,37 @@ integer_param("ple_gap", ple_gap);
> static unsigned int __read_mostly ple_window = 4096;
> integer_param("ple_window", ple_window);
>
> +static bool_t __read_mostly opt_pml_enabled = 0;
> +
> +/*
> + * The 'ept' parameter controls functionalities that depend on, or impact the
> + * EPT mechanism. Optional comma separated value may contain:
> + *
> + * pml Enable PML
> + */
> +static void __init parse_ept_param(char *s)
> +{
> + char *ss;
> + int val;
> +
> + do {
> + val = !!strncmp(s, "no-", 3);
> + if ( !val )
> + s += 3;
> +
> + ss = strchr(s, ',');
> + if ( ss )
> + *ss = '\0';
> +
> + if ( !strcmp(s, "pml") )
> + opt_pml_enabled = val;
> +
> + s = ss + 1;
> + } while ( ss );
> +}
> +
> +custom_param("ept", parse_ept_param);
> +
> /* Dynamic (run-time adjusted) execution control flags. */
> u32 vmx_pin_based_exec_control __read_mostly;
> u32 vmx_cpu_based_exec_control __read_mostly;
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