Re: [PATCH] arm64: Implement branch predictor hardening for Falkor

Shanker Donthineni
2018-01-08T17:18:18Z

Hi Andrew,

On 01/08/2018 03:28 AM, Andrew Jones wrote:
> Hi Shanker,
>
> On Fri, Jan 05, 2018 at 02:28:59PM -0600, Shanker Donthineni wrote:
> ...
>> diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
>> index cb0fb37..daf53a5 100644
>> --- a/arch/arm64/kernel/cpu_errata.c
>> +++ b/arch/arm64/kernel/cpu_errata.c
>> @@ -54,6 +54,8 @@ static int cpu_enable_trap_ctr_access(void *__unused)
>>
>> #ifdef CONFIG_KVM
>> extern char __psci_hyp_bp_inval_start[], __psci_hyp_bp_inval_end[];
>> +extern char __qcom_hyp_sanitize_link_stack_start[];
>> +extern char __qcom_hyp_sanitize_link_stack_end[];
>>
>> static void __copy_hyp_vect_bpi(int slot, const char *hyp_vecs_start,
>> const char *hyp_vecs_end)
>> @@ -96,8 +98,10 @@ static void __install_bp_hardening_cb(bp_hardening_cb_t fn,
>> spin_unlock(&bp_lock);
>> }
>> #else
>> -#define __psci_hyp_bp_inval_start NULL
>> -#define __psci_hyp_bp_inval_end NULL
>> +#define __psci_hyp_bp_inval_start NULL
>> +#define __psci_hyp_bp_inval_end NULL
>> +#define __qcom_hyp_sanitize_link_stack_start NULL
>> +#define __qcom_hyp_sanitize_link_stack_start NULL
> ^^ copy+paste error here

Thanks for catching typo, I'll fix in v2 patch.

>
> Thanks,
> drew
>
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>

--
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.