From: takahiro.akashi@linaro.org (AKASHI Takahiro)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v16 08/16] arm64: cpufeature: add MMFR0 helper functions
Date: Thu, 15 Nov 2018 14:52:47 +0900 [thread overview]
Message-ID: <20181115055254.2812-9-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20181115055254.2812-1-takahiro.akashi@linaro.org>
Those helper functions for MMFR0 register will be used later by kexec_file
loader.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
---
arch/arm64/include/asm/cpufeature.h | 48 +++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 7e2ec64aa414..ef118d819fe8 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -486,11 +486,59 @@ static inline bool system_supports_32bit_el0(void)
return cpus_have_const_cap(ARM64_HAS_32BIT_EL0);
}
+static inline bool system_supports_4kb_granule(void)
+{
+ u64 mmfr0;
+ u32 val;
+
+ mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
+ val = cpuid_feature_extract_unsigned_field(mmfr0,
+ ID_AA64MMFR0_TGRAN4_SHIFT);
+
+ return val == ID_AA64MMFR0_TGRAN4_SUPPORTED;
+}
+
+static inline bool system_supports_64kb_granule(void)
+{
+ u64 mmfr0;
+ u32 val;
+
+ mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
+ val = cpuid_feature_extract_unsigned_field(mmfr0,
+ ID_AA64MMFR0_TGRAN64_SHIFT);
+
+ return val == ID_AA64MMFR0_TGRAN64_SUPPORTED;
+}
+
+static inline bool system_supports_16kb_granule(void)
+{
+ u64 mmfr0;
+ u32 val;
+
+ mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
+ val = cpuid_feature_extract_unsigned_field(mmfr0,
+ ID_AA64MMFR0_TGRAN16_SHIFT);
+
+ return val == ID_AA64MMFR0_TGRAN16_SUPPORTED;
+}
+
static inline bool system_supports_mixed_endian_el0(void)
{
return id_aa64mmfr0_mixed_endian_el0(read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1));
}
+static inline bool system_supports_mixed_endian(void)
+{
+ u64 mmfr0;
+ u32 val;
+
+ mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
+ val = cpuid_feature_extract_unsigned_field(mmfr0,
+ ID_AA64MMFR0_BIGENDEL_SHIFT);
+
+ return val == 0x1;
+}
+
static inline bool system_supports_fpsimd(void)
{
return !cpus_have_const_cap(ARM64_HAS_NO_FPSIMD);
--
2.19.0
next prev parent reply other threads:[~2018-11-15 5:52 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-15 5:52 [PATCH v16 00/16] arm64: kexec: add kexec_file_load() support AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 01/16] asm-generic: add kexec_file_load system call to unistd.h AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 02/16] kexec_file: make kexec_image_post_load_cleanup_default() global AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 03/16] s390, kexec_file: drop arch_kexec_mem_walk() AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 04/16] powerpc, kexec_file: factor out memblock-based arch_kexec_walk_mem() AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 05/16] kexec_file: kexec_walk_memblock() only walks a dedicated region at kdump AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 06/16] lib: fdt: add a helper function for handling memory range property AKASHI Takahiro
2018-11-30 13:21 ` Will Deacon
2018-12-06 14:47 ` Rob Herring
2018-12-06 15:54 ` Will Deacon
2018-12-07 10:12 ` James Morse
2018-12-11 6:17 ` AKASHI, Takahiro
2018-12-11 10:09 ` James Morse
2018-12-12 1:28 ` AKASHI, Takahiro
2018-11-15 5:52 ` [PATCH v16 07/16] arm64: add image head flag definitions AKASHI Takahiro
2018-11-15 5:52 ` AKASHI Takahiro [this message]
2018-11-15 5:52 ` [PATCH v16 09/16] arm64: enable KEXEC_FILE config AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 10/16] arm64: kexec_file: load initrd and device-tree AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 11/16] arm64: kexec_file: allow for loading Image-format kernel AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 12/16] arm64: kexec_file: add crash dump support AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 13/16] arm64: kexec_file: invoke the kernel without purgatory AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 14/16] include: pe.h: remove message[] from mz header definition AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 15/16] arm64: kexec_file: add kernel signature verification support AKASHI Takahiro
2018-11-30 13:21 ` Will Deacon
2018-12-11 5:42 ` AKASHI Takahiro
2018-11-15 5:52 ` [PATCH v16 16/16] arm64: kexec_file: add kaslr support AKASHI Takahiro
2018-11-30 13:19 ` Will Deacon
2018-12-11 5:50 ` AKASHI Takahiro
2018-12-11 7:51 ` AKASHI Takahiro
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