hc
2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390
kernel/arch/arm64/include/asm/cache.h
....@@ -1,22 +1,12 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23 * Copyright (C) 2012 ARM Ltd.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program. If not, see <http://www.gnu.org/licenses/>.
154 */
165 #ifndef __ASM_CACHE_H
176 #define __ASM_CACHE_H
187
198 #include <asm/cputype.h>
9
+#include <asm/mte-def.h>
2010
2111 #define CTR_L1IP_SHIFT 14
2212 #define CTR_L1IP_MASK 3
....@@ -35,11 +25,21 @@
3525 #define CTR_L1IP(ctr) (((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)
3626
3727 #define ICACHE_POLICY_VPIPT 0
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+#define ICACHE_POLICY_RESERVED 1
3829 #define ICACHE_POLICY_VIPT 2
3930 #define ICACHE_POLICY_PIPT 3
4031
4132 #define L1_CACHE_SHIFT (6)
4233 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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+
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+
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+#define CLIDR_LOUU_SHIFT 27
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+#define CLIDR_LOC_SHIFT 24
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+#define CLIDR_LOUIS_SHIFT 21
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+
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+#define CLIDR_LOUU(clidr) (((clidr) >> CLIDR_LOUU_SHIFT) & 0x7)
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+#define CLIDR_LOC(clidr) (((clidr) >> CLIDR_LOC_SHIFT) & 0x7)
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+#define CLIDR_LOUIS(clidr) (((clidr) >> CLIDR_LOUIS_SHIFT) & 0x7)
4343
4444 /*
4545 * Memory returned by kmalloc() may be used for DMA, so we must make
....@@ -50,13 +50,21 @@
5050 */
5151 #define ARCH_DMA_MINALIGN (128)
5252
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-#ifdef CONFIG_KASAN_SW_TAGS
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-#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
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-#endif
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-
5753 #ifndef __ASSEMBLY__
5854
5955 #include <linux/bitops.h>
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+#include <linux/kasan-enabled.h>
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+
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+#ifdef CONFIG_KASAN_SW_TAGS
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+#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
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+#elif defined(CONFIG_KASAN_HW_TAGS)
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+static inline unsigned int arch_slab_minalign(void)
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+{
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+ return kasan_hw_tags_enabled() ? MTE_GRANULE_SIZE :
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+ __alignof__(unsigned long long);
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+}
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+#define arch_slab_minalign() arch_slab_minalign()
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+#endif
6068
6169 #define ICACHEF_ALIASING 0
6270 #define ICACHEF_VPIPT 1
....@@ -71,7 +79,7 @@
7179 return test_bit(ICACHEF_ALIASING, &__icache_flags);
7280 }
7381
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-static inline int icache_is_vpipt(void)
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+static __always_inline int icache_is_vpipt(void)
7583 {
7684 return test_bit(ICACHEF_VPIPT, &__icache_flags);
7785 }
....@@ -81,14 +89,48 @@
8189 return (read_cpuid_cachetype() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
8290 }
8391
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-#define __read_mostly __attribute__((__section__(".data..read_mostly")))
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+#define __read_mostly __section(".data..read_mostly")
8593
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-static inline int cache_line_size(void)
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+static inline int cache_line_size_of_cpu(void)
8795 {
8896 u32 cwg = cache_type_cwg();
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+
8998 return cwg ? 4 << cwg : ARCH_DMA_MINALIGN;
9099 }
91100
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+int cache_line_size(void);
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+
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+/*
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+ * Read the effective value of CTR_EL0.
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+ *
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+ * According to ARM ARM for ARMv8-A (ARM DDI 0487C.a),
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+ * section D10.2.33 "CTR_EL0, Cache Type Register" :
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+ *
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+ * CTR_EL0.IDC reports the data cache clean requirements for
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+ * instruction to data coherence.
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+ *
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+ * 0 - dcache clean to PoU is required unless :
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+ * (CLIDR_EL1.LoC == 0) || (CLIDR_EL1.LoUIS == 0 && CLIDR_EL1.LoUU == 0)
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+ * 1 - dcache clean to PoU is not required for i-to-d coherence.
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+ *
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+ * This routine provides the CTR_EL0 with the IDC field updated to the
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+ * effective state.
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+ */
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+static inline u32 __attribute_const__ read_cpuid_effective_cachetype(void)
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+{
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+ u32 ctr = read_cpuid_cachetype();
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+
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+ if (!(ctr & BIT(CTR_IDC_SHIFT))) {
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+ u64 clidr = read_sysreg(clidr_el1);
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+
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+ if (CLIDR_LOC(clidr) == 0 ||
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+ (CLIDR_LOUIS(clidr) == 0 && CLIDR_LOUU(clidr) == 0))
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+ ctr |= BIT(CTR_IDC_SHIFT);
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+ }
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+
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+ return ctr;
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+}
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+
92134 #endif /* __ASSEMBLY__ */
93135
94136 #endif