From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
commit 79d82cbcbb3d2a56c009ad6a6df92c5dee061dad upstream.
The commit 26f55386f964 ("arm64/mm: Fix __enable_mmu() for new TGRAN range
values") had already switched into testing ID_AA64MMFR0_TGRAN range values.
This just changes system_supports_[4|16|64]kb_granule() helpers to perform
similar range tests as well. While here, it standardizes page size specific
supported min and max TGRAN values.
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Link: https://lore.kernel.org/r/1626237975-1909-1-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Zenghui Yu <yuzenghui@xxxxxxxxxx>
---
arch/arm64/include/asm/cpufeature.h | 9 ++++++---
arch/arm64/include/asm/sysreg.h | 28 ++++++++++++++++------------
2 files changed, 22 insertions(+), 15 deletions(-)
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 423f9b40e4d9..31ba0ac7db63 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -648,7 +648,8 @@ static inline bool system_supports_4kb_granule(void)
val = cpuid_feature_extract_unsigned_field(mmfr0,
ID_AA64MMFR0_TGRAN4_SHIFT);
- return val == ID_AA64MMFR0_TGRAN4_SUPPORTED;
+ return (val >= ID_AA64MMFR0_TGRAN4_SUPPORTED_MIN) &&
+ (val <= ID_AA64MMFR0_TGRAN4_SUPPORTED_MAX);
}
static inline bool system_supports_64kb_granule(void)
@@ -660,7 +661,8 @@ static inline bool system_supports_64kb_granule(void)
val = cpuid_feature_extract_unsigned_field(mmfr0,
ID_AA64MMFR0_TGRAN64_SHIFT);
- return val == ID_AA64MMFR0_TGRAN64_SUPPORTED;
+ return (val >= ID_AA64MMFR0_TGRAN64_SUPPORTED_MIN) &&
+ (val <= ID_AA64MMFR0_TGRAN64_SUPPORTED_MAX);
}
static inline bool system_supports_16kb_granule(void)
@@ -672,7 +674,8 @@ static inline bool system_supports_16kb_granule(void)
val = cpuid_feature_extract_unsigned_field(mmfr0,
ID_AA64MMFR0_TGRAN16_SHIFT);
- return val == ID_AA64MMFR0_TGRAN16_SUPPORTED;
+ return (val >= ID_AA64MMFR0_TGRAN16_SUPPORTED_MIN) &&
+ (val <= ID_AA64MMFR0_TGRAN16_SUPPORTED_MAX);
}
static inline bool system_supports_mixed_endian_el0(void)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 763a745af6a8..06755fad3830 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -786,12 +786,16 @@
#define ID_AA64MMFR0_ASID_SHIFT 4
#define ID_AA64MMFR0_PARANGE_SHIFT 0
-#define ID_AA64MMFR0_TGRAN4_NI 0xf
-#define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0
-#define ID_AA64MMFR0_TGRAN64_NI 0xf
-#define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0
-#define ID_AA64MMFR0_TGRAN16_NI 0x0
-#define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1
+#define ID_AA64MMFR0_TGRAN4_NI 0xf
+#define ID_AA64MMFR0_TGRAN4_SUPPORTED_MIN 0x0
+#define ID_AA64MMFR0_TGRAN4_SUPPORTED_MAX 0x7
+#define ID_AA64MMFR0_TGRAN64_NI 0xf
+#define ID_AA64MMFR0_TGRAN64_SUPPORTED_MIN 0x0
+#define ID_AA64MMFR0_TGRAN64_SUPPORTED_MAX 0x7
+#define ID_AA64MMFR0_TGRAN16_NI 0x0
+#define ID_AA64MMFR0_TGRAN16_SUPPORTED_MIN 0x1
+#define ID_AA64MMFR0_TGRAN16_SUPPORTED_MAX 0xf
+
#define ID_AA64MMFR0_PARANGE_48 0x5
#define ID_AA64MMFR0_PARANGE_52 0x6
@@ -961,16 +965,16 @@
#if defined(CONFIG_ARM64_4K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN4_SHIFT
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN4_SUPPORTED
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX 0x7
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN4_SUPPORTED_MIN
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX ID_AA64MMFR0_TGRAN4_SUPPORTED_MAX
#elif defined(CONFIG_ARM64_16K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN16_SHIFT
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN16_SUPPORTED
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX 0xF
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN16_SUPPORTED_MIN
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX ID_AA64MMFR0_TGRAN16_SUPPORTED_MAX
#elif defined(CONFIG_ARM64_64K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN64_SHIFT
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN64_SUPPORTED
-#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX 0x7
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN64_SUPPORTED_MIN
+#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX ID_AA64MMFR0_TGRAN64_SUPPORTED_MAX
#endif
#define MVFR2_FPMISC_SHIFT 4
--
2.33.0
