Re: [Xen-devel] [PATCH 9/9] xen/arm: Help to know the hardening provided for a CPU

[Julien Grall <julien.grall@xxxxxxx>]

Hmmm sorry, I was not meant to be sent with this series. I will resend 
it separately with a proper commit message.
On 05/02/18 13:20, Julien Grall wrote:
> ---
>   xen/arch/arm/cpuerrata.c | 9 +++++++--
>   1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/xen/arch/arm/cpuerrata.c b/xen/arch/arm/cpuerrata.c
> index 9c7458ef06..6704648b26 100644
> --- a/xen/arch/arm/cpuerrata.c
> +++ b/xen/arch/arm/cpuerrata.c
> @@ -79,7 +79,8 @@ static bool copy_hyp_vect_bpi(unsigned int slot, const char 
> *hyp_vec_start,
>   static bool __maybe_unused
>   install_bp_hardening_vec(const struct arm_cpu_capabilities *entry,
>                            const char *hyp_vec_start,
> -                         const char *hyp_vec_end)
> +                         const char *hyp_vec_end,
> +                         const char *desc)
>   {
>       static int last_slot = -1;
>       static DEFINE_SPINLOCK(bp_lock);
> @@ -94,6 +95,9 @@ install_bp_hardening_vec(const struct arm_cpu_capabilities 
> *entry,
>       if ( !entry->matches(entry) )
>           return true;
>   
> +    printk(XENLOG_INFO "CPU%u will %s on exception entry\n",
> +           smp_processor_id(), desc);
> +
>       /*
>        * No need to install hardened vector when the processor has
>        * ID_AA64PRF0_EL1.CSV2 set.
> @@ -157,7 +161,8 @@ static int enable_psci_bp_hardening(void *data)
>        */
>       if ( psci_ver >= PSCI_VERSION(0, 2) )
>           ret = install_bp_hardening_vec(data, __psci_hyp_bp_inval_start,
> -                                       __psci_hyp_bp_inval_end);
> +                                       __psci_hyp_bp_inval_end,
> +                                       "call PSCI get version");
>       else if ( !warned )
>       {
>           ASSERT(system_state < SYS_STATE_active);
--
Julien Grall

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