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x86, s390/mm: Move sme_active() and sme_me_mask to x86-specific header

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Now that generic code doesn't reference them, move sme_active() and
sme_me_mask to x86's <asm/mem_encrypt.h>.

Also remove the export for sme_active() since it's only used in files that
won't be built as modules. sme_me_mask on the other hand is used in
arch/x86/kvm/svm.c (via __sme_set() and __psp_pa()) which can be built as a
module so its export needs to stay.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190806044919.10622-5-bauerman@linux.ibm.com
This commit is contained in:
Thiago Jung Bauermann 2019-08-06 01:49:17 -03:00 committed by Michael Ellerman
parent e740815a97
commit 284e21fab2
4 changed files with 12 additions and 17 deletions
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4
arch/s390/include/asm/mem_encrypt.h
View File

@ -4,9 +4,7 @@
#ifndef __ASSEMBLY__
#define sme_me_mask 0ULL
static inline bool sme_active(void) { return false; }
static inline bool mem_encrypt_active(void) { return false; }
extern bool sev_active(void);
int set_memory_encrypted(unsigned long addr, int numpages);

10
arch/x86/include/asm/mem_encrypt.h
View File

@ -92,6 +92,16 @@ early_set_memory_encrypted(unsigned long vaddr, unsigned long size) { return 0;
extern char __start_bss_decrypted[], __end_bss_decrypted[], __start_bss_decrypted_unused[];
static inline bool mem_encrypt_active(void)
{
return sme_me_mask;
}
static inline u64 sme_get_me_mask(void)
{
return sme_me_mask;
}
#endif /* __ASSEMBLY__ */
#endif /* __X86_MEM_ENCRYPT_H__ */

1
arch/x86/mm/mem_encrypt.c
View File

@ -344,7 +344,6 @@ bool sme_active(void)
{
return sme_me_mask && !sev_enabled;
}
EXPORT_SYMBOL(sme_active);
bool sev_active(void)
{

14
include/linux/mem_encrypt.h
View File

@ -18,23 +18,11 @@
#else /* !CONFIG_ARCH_HAS_MEM_ENCRYPT */
#define sme_me_mask 0ULL
static inline bool sme_active(void) { return false; }
static inline bool mem_encrypt_active(void) { return false; }
static inline bool sev_active(void) { return false; }
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
static inline bool mem_encrypt_active(void)
{
return sme_me_mask;
}
static inline u64 sme_get_me_mask(void)
{
return sme_me_mask;
}
#ifdef CONFIG_AMD_MEM_ENCRYPT
/*
* The __sme_set() and __sme_clr() macros are useful for adding or removing