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ec73859d76
When extra warnings are enabled, the cc_mask definition in <asm/coco.h>
causes a build failure with GCC:
arch/x86/include/asm/coco.h:28:18: error: 'cc_mask' defined but not used [-Werror=unused-const-variable=]
28 | static const u64 cc_mask = 0;
Add a cc_get_mask() function mirroring cc_set_mask() for the one
user of the variable outside of the CoCo implementation.
Fixes: a0a8d15a79 ("x86/tdx: Preserve shared bit on mprotect()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250310131114.2635497-1-arnd@kernel.org
--
v2: use an inline helper instead of a __maybe_unused annotaiton.
51 lines
782 B
C
51 lines
782 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_COCO_H
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#define _ASM_X86_COCO_H
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#include <asm/asm.h>
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#include <asm/types.h>
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enum cc_vendor {
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CC_VENDOR_NONE,
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CC_VENDOR_AMD,
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CC_VENDOR_INTEL,
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};
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#ifdef CONFIG_ARCH_HAS_CC_PLATFORM
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extern enum cc_vendor cc_vendor;
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extern u64 cc_mask;
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static inline u64 cc_get_mask(void)
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{
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return cc_mask;
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}
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static inline void cc_set_mask(u64 mask)
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{
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RIP_REL_REF(cc_mask) = mask;
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}
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u64 cc_mkenc(u64 val);
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u64 cc_mkdec(u64 val);
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void cc_random_init(void);
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#else
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#define cc_vendor (CC_VENDOR_NONE)
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static inline u64 cc_get_mask(void)
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{
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return 0;
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}
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static inline u64 cc_mkenc(u64 val)
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{
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return val;
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}
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static inline u64 cc_mkdec(u64 val)
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{
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return val;
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}
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static inline void cc_random_init(void) { }
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#endif
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#endif /* _ASM_X86_COCO_H */
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