diff options
Diffstat (limited to 'debian/patches-rt/0047-arm-disable-NEON-in-kernel-mode.patch')
| -rw-r--r-- | debian/patches-rt/0047-arm-disable-NEON-in-kernel-mode.patch | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/debian/patches-rt/0047-arm-disable-NEON-in-kernel-mode.patch b/debian/patches-rt/0047-arm-disable-NEON-in-kernel-mode.patch new file mode 100644 index 000000000..03e38de78 --- /dev/null +++ b/debian/patches-rt/0047-arm-disable-NEON-in-kernel-mode.patch @@ -0,0 +1,166 @@ +From 8cd6e5200e3869218d2da84e16e4638eb6de6923 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Fri, 1 Dec 2017 10:42:03 +0100 +Subject: [PATCH 047/347] arm*: disable NEON in kernel mode +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +NEON in kernel mode is used by the crypto algorithms and raid6 code. +While the raid6 code looks okay, the crypto algorithms do not: NEON +is enabled on first invocation and may allocate/free/map memory before +the NEON mode is disabled again. +This needs to be changed until it can be enabled. +On ARM NEON in kernel mode can be simply disabled. on ARM64 it needs to +stay on due to possible EFI callbacks so here I disable each algorithm. + +Cc: stable-rt@vger.kernel.org +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/arm/Kconfig | 2 +- + arch/arm64/crypto/Kconfig | 28 ++++++++++++++-------------- + arch/arm64/crypto/crc32-ce-glue.c | 3 ++- + 3 files changed, 17 insertions(+), 16 deletions(-) + +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index 32d59b815b52..ec99422059e3 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -2166,7 +2166,7 @@ config NEON + + config KERNEL_MODE_NEON + bool "Support for NEON in kernel mode" +- depends on NEON && AEABI ++ depends on NEON && AEABI && !PREEMPT_RT_BASE + help + Say Y to include support for NEON in kernel mode. + +diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig +index d51944ff9f91..0d4b3f0cfba6 100644 +--- a/arch/arm64/crypto/Kconfig ++++ b/arch/arm64/crypto/Kconfig +@@ -19,43 +19,43 @@ config CRYPTO_SHA512_ARM64 + + config CRYPTO_SHA1_ARM64_CE + tristate "SHA-1 digest algorithm (ARMv8 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_SHA1 + + config CRYPTO_SHA2_ARM64_CE + tristate "SHA-224/SHA-256 digest algorithm (ARMv8 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_SHA256_ARM64 + + config CRYPTO_SHA512_ARM64_CE + tristate "SHA-384/SHA-512 digest algorithm (ARMv8 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_SHA512_ARM64 + + config CRYPTO_SHA3_ARM64 + tristate "SHA3 digest algorithm (ARMv8.2 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_SHA3 + + config CRYPTO_SM3_ARM64_CE + tristate "SM3 digest algorithm (ARMv8.2 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_SM3 + + config CRYPTO_SM4_ARM64_CE + tristate "SM4 symmetric cipher (ARMv8.2 Crypto Extensions)" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_ALGAPI + select CRYPTO_SM4 + + config CRYPTO_GHASH_ARM64_CE + tristate "GHASH/AES-GCM using ARMv8 Crypto Extensions" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_HASH + select CRYPTO_GF128MUL + select CRYPTO_AES +@@ -63,7 +63,7 @@ config CRYPTO_GHASH_ARM64_CE + + config CRYPTO_CRCT10DIF_ARM64_CE + tristate "CRCT10DIF digest algorithm using PMULL instructions" +- depends on KERNEL_MODE_NEON && CRC_T10DIF ++ depends on KERNEL_MODE_NEON && CRC_T10DIF && !PREEMPT_RT_BASE + select CRYPTO_HASH + + config CRYPTO_CRC32_ARM64_CE +@@ -77,13 +77,13 @@ config CRYPTO_AES_ARM64 + + config CRYPTO_AES_ARM64_CE + tristate "AES core cipher using ARMv8 Crypto Extensions" +- depends on ARM64 && KERNEL_MODE_NEON ++ depends on ARM64 && KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_ALGAPI + select CRYPTO_AES_ARM64 + + config CRYPTO_AES_ARM64_CE_CCM + tristate "AES in CCM mode using ARMv8 Crypto Extensions" +- depends on ARM64 && KERNEL_MODE_NEON ++ depends on ARM64 && KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_ALGAPI + select CRYPTO_AES_ARM64_CE + select CRYPTO_AES_ARM64 +@@ -91,7 +91,7 @@ config CRYPTO_AES_ARM64_CE_CCM + + config CRYPTO_AES_ARM64_CE_BLK + tristate "AES in ECB/CBC/CTR/XTS modes using ARMv8 Crypto Extensions" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_BLKCIPHER + select CRYPTO_AES_ARM64_CE + select CRYPTO_AES_ARM64 +@@ -99,7 +99,7 @@ config CRYPTO_AES_ARM64_CE_BLK + + config CRYPTO_AES_ARM64_NEON_BLK + tristate "AES in ECB/CBC/CTR/XTS modes using NEON instructions" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_BLKCIPHER + select CRYPTO_AES_ARM64 + select CRYPTO_AES +@@ -107,13 +107,13 @@ config CRYPTO_AES_ARM64_NEON_BLK + + config CRYPTO_CHACHA20_NEON + tristate "NEON accelerated ChaCha20 symmetric cipher" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_BLKCIPHER + select CRYPTO_CHACHA20 + + config CRYPTO_AES_ARM64_BS + tristate "AES in ECB/CBC/CTR/XTS modes using bit-sliced NEON algorithm" +- depends on KERNEL_MODE_NEON ++ depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE + select CRYPTO_BLKCIPHER + select CRYPTO_AES_ARM64_NEON_BLK + select CRYPTO_AES_ARM64 +diff --git a/arch/arm64/crypto/crc32-ce-glue.c b/arch/arm64/crypto/crc32-ce-glue.c +index 34b4e3d46aab..ae055cdad8cf 100644 +--- a/arch/arm64/crypto/crc32-ce-glue.c ++++ b/arch/arm64/crypto/crc32-ce-glue.c +@@ -208,7 +208,8 @@ static struct shash_alg crc32_pmull_algs[] = { { + + static int __init crc32_pmull_mod_init(void) + { +- if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_PMULL)) { ++ if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && ++ !IS_ENABLED(CONFIG_PREEMPT_RT_BASE) && (elf_hwcap & HWCAP_PMULL)) { + crc32_pmull_algs[0].update = crc32_pmull_update; + crc32_pmull_algs[1].update = crc32c_pmull_update; + +-- +2.36.1 + |