diff options
| author | Andre Przywara <andre.przywara@arm.com> | 2014-11-14 18:54:12 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-11-25 18:56:42 +0300 |
| commit | c0a01b84b1fdbd98bff5bca5b201fe73fda7e9d9 (patch) | |
| tree | 56123732185978499ae1a2f22fd1c9191d28a5d4 /arch/arm64/kernel/cpu_errata.c | |
| parent | 5afaa1fc1b320cec48affa7e6949f2493f875c12 (diff) | |
| download | linux-c0a01b84b1fdbd98bff5bca5b201fe73fda7e9d9.tar.xz | |
arm64: protect alternatives workarounds with Kconfig options
Not all of the errata we have workarounds for apply necessarily to all
SoCs, so people compiling a kernel for one very specific SoC may not
need to patch the kernel.
Introduce a new submenu in the "Platform selection" menu to allow
people to turn off certain bugs if they are not affected. By default
all of them are enabled.
Normal users or distribution kernels shouldn't bother to deselect any
bugs here, since the alternatives framework will take care of
patching them in only if needed.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
[will: moved kconfig menu under `Kernel Features']
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/cpu_errata.c')
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 30935d2da55a..5a5226ffcbc8 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -65,18 +65,32 @@ is_affected_midr_range(struct arm64_cpu_capabilities *entry) .midr_range_max = max struct arm64_cpu_capabilities arm64_errata[] = { +#if defined(CONFIG_ARM64_ERRATUM_826319) || \ + defined(CONFIG_ARM64_ERRATUM_827319) || \ + defined(CONFIG_ARM64_ERRATUM_824069) { /* Cortex-A53 r0p[012] */ .desc = "ARM errata 826319, 827319, 824069", .capability = ARM64_WORKAROUND_CLEAN_CACHE, MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x02), }, +#endif +#ifdef CONFIG_ARM64_ERRATUM_819472 + { + /* Cortex-A53 r0p[01] */ + .desc = "ARM errata 819472", + .capability = ARM64_WORKAROUND_CLEAN_CACHE, + MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x01), + }, +#endif +#ifdef CONFIG_ARM64_ERRATUM_832075 { /* Cortex-A57 r0p0 - r1p2 */ .desc = "ARM erratum 832075", .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE, MIDR_RANGE(MIDR_CORTEX_A57, 0x00, 0x12), }, +#endif { } }; |