Re: [PATCH v3 4/5] x86/head/64: Check SEV encryption before switching to kernel page-table

[Borislav Petkov]

On Wed, Oct 21, 2020 at 02:39:37PM +0200, Joerg Roedel wrote:
> diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
> index ebb7edc8bc0a..bd9b62af2e3d 100644
> --- a/arch/x86/mm/mem_encrypt.c
> +++ b/arch/x86/mm/mem_encrypt.c
> @@ -39,6 +39,7 @@
>   */
>  u64 sme_me_mask __section(.data) = 0;
>  u64 sev_status __section(.data) = 0;
> +u64 sev_check_data __section(.data) = 0;

Apparently section names are supposed to be given as strings now:

In file included from ././include/linux/compiler_types.h:65,
                 from <command-line>:
arch/x86/mm/mem_encrypt.c:42:30: error: expected expression before ‘.’ token
   42 | u64 sev_check_data __section(.data) = 0;
      |                              ^
./include/linux/compiler_attributes.h:257:68: note: in definition of macro ‘__section’
  257 | #define __section(section)              __attribute__((__section__(section)))
      |                                                                    ^~~~~~~
arch/x86/mm/mem_encrypt.c:42:30: error: section attribute argument not a string constant
   42 | u64 sev_check_data __section(.data) = 0;
      |                              ^
./include/linux/compiler_attributes.h:257:68: note: in definition of macro ‘__section’
  257 | #define __section(section)              __attribute__((__section__(section)))
      |                                                                    ^~~~~~~
make[2]: *** [scripts/Makefile.build:283: arch/x86/mm/mem_encrypt.o] Error 1
make[1]: *** [scripts/Makefile.build:500: arch/x86/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1799: arch/x86] Error 2
make: *** Waiting for unfinished jobs....

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette