7f317d3490
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/20200726110117.16346-1-grandmaster@al2klimov.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef __SOC_ARC_AUX_H__
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#define __SOC_ARC_AUX_H__
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#ifdef CONFIG_ARC
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#define read_aux_reg(r) __builtin_arc_lr(r)
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/* gcc builtin sr needs reg param to be long immediate */
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#define write_aux_reg(r, v) __builtin_arc_sr((unsigned int)(v), r)
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#else /* !CONFIG_ARC */
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static inline int read_aux_reg(u32 r)
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{
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return 0;
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}
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/*
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* function helps elide unused variable warning
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* see: https://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html
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*/
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static inline void write_aux_reg(u32 r, u32 v)
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{
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;
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}
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#endif
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#define READ_BCR(reg, into) \
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{ \
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unsigned int tmp; \
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tmp = read_aux_reg(reg); \
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if (sizeof(tmp) == sizeof(into)) { \
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into = *((typeof(into) *)&tmp); \
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} else { \
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extern void bogus_undefined(void); \
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bogus_undefined(); \
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} \
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}
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#define WRITE_AUX(reg, into) \
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{ \
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unsigned int tmp; \
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if (sizeof(tmp) == sizeof(into)) { \
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tmp = (*(unsigned int *)&(into)); \
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write_aux_reg(reg, tmp); \
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} else { \
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extern void bogus_undefined(void); \
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bogus_undefined(); \
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} \
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}
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#endif
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