Re: [PATCH V2 03/14] x86/set_memory: Add x86_set_memory_enc static call support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 8/4/21 11:44 AM, Tianyu Lan wrote:
> +static int default_set_memory_enc(unsigned long addr, int numpages, bool enc);
> +DEFINE_STATIC_CALL(x86_set_memory_enc, default_set_memory_enc);
> +
>  #define CPA_FLUSHTLB 1
>  #define CPA_ARRAY 2
>  #define CPA_PAGES_ARRAY 4
> @@ -1981,6 +1985,11 @@ int set_memory_global(unsigned long addr, int numpages)
>  }
>  
>  static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
> +{
> +	return static_call(x86_set_memory_enc)(addr, numpages, enc);
> +}
> +
> +static int default_set_memory_enc(unsigned long addr, int numpages, bool enc)
>  {
>  	struct cpa_data cpa;
>  	int ret;

It doesn't make a lot of difference to add this infrastructure and then
ignore it for the existing in-tree user:

> static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
> {
>         struct cpa_data cpa;
>         int ret;
> 
>         /* Nothing to do if memory encryption is not active */
>         if (!mem_encrypt_active())
>                 return 0;

Shouldn't the default be to just "return 0"?  Then on
mem_encrypt_active() systems, do the bulk of what is in
__set_memory_enc_dec() today.




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]

  Powered by Linux