diff options
Diffstat (limited to 'arch/arm64/kernel/setup.c')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index e578171b22ff..46d1125571f6 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -25,6 +25,7 @@ #include <linux/utsname.h> #include <linux/initrd.h> #include <linux/console.h> +#include <linux/cache.h> #include <linux/bootmem.h> #include <linux/seq_file.h> #include <linux/screen_info.h> @@ -200,6 +201,8 @@ static void __init setup_processor(void) { struct cpu_info *cpu_info; u64 features, block; + u32 cwg; + int cls; cpu_info = lookup_processor_type(read_cpuid_id()); if (!cpu_info) { @@ -217,6 +220,18 @@ static void __init setup_processor(void) elf_hwcap = 0; /* + * Check for sane CTR_EL0.CWG value. + */ + cwg = cache_type_cwg(); + cls = cache_line_size(); + if (!cwg) + pr_warn("No Cache Writeback Granule information, assuming cache line size %d\n", + cls); + if (L1_CACHE_BYTES < cls) + pr_warn("L1_CACHE_BYTES smaller than the Cache Writeback Granule (%d < %d)\n", + L1_CACHE_BYTES, cls); + + /* * ID_AA64ISAR0_EL1 contains 4-bit wide signed feature blocks. * The blocks we test below represent incremental functionality * for non-negative values. Negative values are reserved. @@ -363,7 +378,6 @@ void __init setup_arch(char **cmdline_p) *cmdline_p = boot_command_line; - init_mem_pgprot(); early_ioremap_init(); parse_early_param(); |