arm64/sysreg: Standardise naming for CTR_EL0 fields

cache.h contains some defines which are used to represent fields and
enumeration values which do not follow the standard naming convention used for
when we automatically generate defines for system registers. Update the
names of the constants to reflect standardised naming and move them to
sysreg.h.

There is also a helper CTR_L1IP() which was open coded and has been
converted to use SYS_FIELD_GET().
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-7-broonie@kernel.orgSigned-off-by: Will Deacon <will@kernel.org>

arch/arm64/include/asm/cache.h

@@ -5,24 +5,6 @@
 #ifndef __ASM_CACHE_H
 #define __ASM_CACHE_H
 
-#define CTR_L1IP_SHIFT		14
-#define CTR_L1IP_MASK		3
-#define CTR_DMINLINE_SHIFT	16
-#define CTR_IMINLINE_SHIFT	0
-#define CTR_IMINLINE_MASK	0xf
-#define CTR_ERG_SHIFT		20
-#define CTR_CWG_SHIFT		24
-#define CTR_CWG_MASK		15
-#define CTR_IDC_SHIFT		28
-#define CTR_DIC_SHIFT		29
-
-#define CTR_CACHE_MINLINE_MASK	\
-	(0xf << CTR_DMINLINE_SHIFT | CTR_IMINLINE_MASK << CTR_IMINLINE_SHIFT)
-
-#define ICACHE_POLICY_VPIPT	0
-#define ICACHE_POLICY_VIPT	2
-#define ICACHE_POLICY_PIPT	3
-
 #define L1_CACHE_SHIFT		(6)
 #define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
 
@@ -50,6 +32,7 @@
 
 #include <asm/cputype.h>
 #include <asm/mte-def.h>
+#include <asm/sysreg.h>
 
 #ifdef CONFIG_KASAN_SW_TAGS
 #define ARCH_SLAB_MINALIGN	(1ULL << KASAN_SHADOW_SCALE_SHIFT)
@@ -62,7 +45,11 @@ static inline unsigned int arch_slab_minalign(void)
 #define arch_slab_minalign() arch_slab_minalign()
 #endif
 
-#define CTR_L1IP(ctr)		(((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)
+#define CTR_CACHE_MINLINE_MASK	\
+	(0xf << CTR_EL0_DMINLINE_SHIFT | \
+	 CTR_EL0_IMINLINE_MASK << CTR_EL0_IMINLINE_SHIFT)
+
+#define CTR_L1IP(ctr)		SYS_FIELD_GET(CTR_EL0, L1Ip, ctr)
 
 #define ICACHEF_ALIASING	0
 #define ICACHEF_VPIPT		1
@@ -84,7 +71,7 @@ static __always_inline int icache_is_vpipt(void)
 
 static inline u32 cache_type_cwg(void)
 {
-	return (read_cpuid_cachetype() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
+	return (read_cpuid_cachetype() >> CTR_EL0_CWG_SHIFT) & CTR_EL0_CWG_MASK;
 }
 
 #define __read_mostly __section(".data..read_mostly")
@@ -118,12 +105,12 @@ static inline u32 __attribute_const__ read_cpuid_effective_cachetype(void)
 {
 	u32 ctr = read_cpuid_cachetype();
 
-	if (!(ctr & BIT(CTR_IDC_SHIFT))) {
+	if (!(ctr & BIT(CTR_EL0_IDC_SHIFT))) {
 		u64 clidr = read_sysreg(clidr_el1);
 
 		if (CLIDR_LOC(clidr) == 0 ||
 		    (CLIDR_LOUIS(clidr) == 0 && CLIDR_LOUU(clidr) == 0))
-			ctr |= BIT(CTR_IDC_SHIFT);
+			ctr |= BIT(CTR_EL0_IDC_SHIFT);
 	}
 
 	return ctr;

arch/arm64/include/asm/sysreg.h

@@ -1084,6 +1084,21 @@
 #define MVFR2_FPMISC_SHIFT		4
 #define MVFR2_SIMDMISC_SHIFT		0
 
+#define CTR_EL0_L1Ip_VPIPT		0
+#define CTR_EL0_L1Ip_VIPT		2
+#define CTR_EL0_L1Ip_PIPT		3
+
+#define CTR_EL0_L1Ip_SHIFT		14
+#define CTR_EL0_L1Ip_MASK		3
+#define CTR_EL0_DminLine_SHIFT		16
+#define CTR_EL0_IminLine_SHIFT		0
+#define CTR_EL0_IminLine_MASK		0xf
+#define CTR_EL0_ERG_SHIFT		20
+#define CTR_EL0_CWG_SHIFT		24
+#define CTR_EL0_CWG_MASK		15
+#define CTR_EL0_IDC_SHIFT		28
+#define CTR_EL0_DIC_SHIFT		29
+
 #define DCZID_DZP_SHIFT			4
 #define DCZID_BS_SHIFT			0
 

arch/arm64/kernel/alternative.c

@@ -121,7 +121,7 @@ static void clean_dcache_range_nopatch(u64 start, u64 end)
 
 	ctr_el0 = read_sanitised_ftr_reg(SYS_CTR_EL0);
 	d_size = 4 << cpuid_feature_extract_unsigned_field(ctr_el0,
-							   CTR_DMINLINE_SHIFT);
+							   CTR_EL0_DminLine_SHIFT);
 	cur = start & ~(d_size - 1);
 	do {
 		/*

arch/arm64/kernel/cpu_errata.c

@@ -187,7 +187,7 @@ has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry,
 				int scope)
 {
 	u32 midr = read_cpuid_id();
-	bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT);
+	bool has_dic = read_cpuid_cachetype() & BIT(CTR_EL0_DIC_SHIFT);
 	const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1);
 
 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());

arch/arm64/kernel/cpufeature.c

@@ -396,18 +396,18 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
 
 static const struct arm64_ftr_bits ftr_ctr[] = {
 	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, 31, 1, 1), /* RES1 */
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_DIC_SHIFT, 1, 1),
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_IDC_SHIFT, 1, 1),
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_HIGHER_OR_ZERO_SAFE, CTR_CWG_SHIFT, 4, 0),
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_HIGHER_OR_ZERO_SAFE, CTR_ERG_SHIFT, 4, 0),
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_DMINLINE_SHIFT, 4, 1),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_EL0_DIC_SHIFT, 1, 1),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_EL0_IDC_SHIFT, 1, 1),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_HIGHER_OR_ZERO_SAFE, CTR_EL0_CWG_SHIFT, 4, 0),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_HIGHER_OR_ZERO_SAFE, CTR_EL0_ERG_SHIFT, 4, 0),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_EL0_DminLine_SHIFT, 4, 1),
 	/*
 	 * Linux can handle differing I-cache policies. Userspace JITs will
 	 * make use of *minLine.
 	 * If we have differing I-cache policies, report it as the weakest - VIPT.
 	 */
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, CTR_L1IP_SHIFT, 2, ICACHE_POLICY_VIPT),	/* L1Ip */
-	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_IMINLINE_SHIFT, 4, 0),
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, CTR_EL0_L1Ip_SHIFT, 2, CTR_EL0_L1Ip_VIPT),	/* L1Ip */
+	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, CTR_EL0_IminLine_SHIFT, 4, 0),
 	ARM64_FTR_END,
 };
 
@@ -1480,7 +1480,7 @@ static bool has_cache_idc(const struct arm64_cpu_capabilities *entry,
 	else
 		ctr = read_cpuid_effective_cachetype();
 
-	return ctr & BIT(CTR_IDC_SHIFT);
+	return ctr & BIT(CTR_EL0_IDC_SHIFT);
 }
 
 static void cpu_emulate_effective_ctr(const struct arm64_cpu_capabilities *__unused)
@@ -1491,7 +1491,7 @@ static void cpu_emulate_effective_ctr(const struct arm64_cpu_capabilities *__unu
 	 * to the CTR_EL0 on this CPU and emulate it with the real/safe
 	 * value.
 	 */
-	if (!(read_cpuid_cachetype() & BIT(CTR_IDC_SHIFT)))
+	if (!(read_cpuid_cachetype() & BIT(CTR_EL0_IDC_SHIFT)))
 		sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0);
 }
 
@@ -1505,7 +1505,7 @@ static bool has_cache_dic(const struct arm64_cpu_capabilities *entry,
 	else
 		ctr = read_cpuid_cachetype();
 
-	return ctr & BIT(CTR_DIC_SHIFT);
+	return ctr & BIT(CTR_EL0_DIC_SHIFT);
 }
 
 static bool __maybe_unused

arch/arm64/kernel/cpuinfo.c

@@ -36,11 +36,11 @@ static struct cpuinfo_arm64 boot_cpu_data;
 static inline const char *icache_policy_str(int l1ip)
 {
 	switch (l1ip) {
-	case ICACHE_POLICY_VPIPT:
+	case CTR_EL0_L1Ip_VPIPT:
 		return "VPIPT";
-	case ICACHE_POLICY_VIPT:
+	case CTR_EL0_L1Ip_VIPT:
 		return "VIPT";
-	case ICACHE_POLICY_PIPT:
+	case CTR_EL0_L1Ip_PIPT:
 		return "PIPT";
 	default:
 		return "RESERVED/UNKNOWN";
@@ -349,12 +349,12 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
 	u32 l1ip = CTR_L1IP(info->reg_ctr);
 
 	switch (l1ip) {
-	case ICACHE_POLICY_PIPT:
+	case CTR_EL0_L1Ip_PIPT:
 		break;
-	case ICACHE_POLICY_VPIPT:
+	case CTR_EL0_L1Ip_VPIPT:
 		set_bit(ICACHEF_VPIPT, &__icache_flags);
 		break;
-	case ICACHE_POLICY_VIPT:
+	case CTR_EL0_L1Ip_VIPT:
 	default:
 		/* Assume aliasing */
 		set_bit(ICACHEF_ALIASING, &__icache_flags);

arch/arm64/kernel/traps.c

@@ -579,11 +579,11 @@ static void ctr_read_handler(unsigned long esr, struct pt_regs *regs)
 
 	if (cpus_have_const_cap(ARM64_WORKAROUND_1542419)) {
 		/* Hide DIC so that we can trap the unnecessary maintenance...*/
-		val &= ~BIT(CTR_DIC_SHIFT);
+		val &= ~BIT(CTR_EL0_DIC_SHIFT);
 
 		/* ... and fake IminLine to reduce the number of traps. */
-		val &= ~CTR_IMINLINE_MASK;
-		val |= (PAGE_SHIFT - 2) & CTR_IMINLINE_MASK;
+		val &= ~CTR_EL0_IminLine_MASK;
+		val |= (PAGE_SHIFT - 2) & CTR_EL0_IminLine_MASK;
 	}
 
 	pt_regs_write_reg(regs, rt, val);