[PATCH 4.4 36/75] arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-06-22 22:45:28
Also in:
lkml
4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Catalin Marinas <catalin.marinas@arm.com> commit e47b020a323d1b2a7b1e9aac86e99eae19463630 upstream. This patch brings the PER_LINUX32 /proc/cpuinfo format more in line with the 32-bit ARM one by providing an additional line: model name : ARMv8 Processor rev X (v8l) Acked-by: Will Deacon <redacted> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/arm64/include/asm/elf.h | 4 ++-- arch/arm64/kernel/cpuinfo.c | 8 +++++++- 2 files changed, 9 insertions(+), 3 deletions(-)
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h@@ -156,14 +156,14 @@ extern int arch_setup_additional_pages(s #define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12)) #endif -#ifdef CONFIG_COMPAT - #ifdef __AARCH64EB__ #define COMPAT_ELF_PLATFORM ("v8b") #else #define COMPAT_ELF_PLATFORM ("v8l") #endif +#ifdef CONFIG_COMPAT + #define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3) /* AArch32 registers. */ --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c
@@ -22,6 +22,8 @@ #include <linux/bitops.h> #include <linux/bug.h> +#include <linux/compat.h> +#include <linux/elf.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/personality.h>
@@ -102,6 +104,7 @@ static const char *const compat_hwcap2_s static int c_show(struct seq_file *m, void *v) { int i, j; + bool compat = personality(current->personality) == PER_LINUX32; for_each_online_cpu(i) { struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
@@ -113,6 +116,9 @@ static int c_show(struct seq_file *m, vo * "processor". Give glibc what it expects. */ seq_printf(m, "processor\t: %d\n", i); + if (compat) + seq_printf(m, "model name\t: ARMv8 Processor rev %d (%s)\n", + MIDR_REVISION(midr), COMPAT_ELF_PLATFORM); seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", loops_per_jiffy / (500000UL/HZ),
@@ -125,7 +131,7 @@ static int c_show(struct seq_file *m, vo * software which does already (at least for 32-bit). */ seq_puts(m, "Features\t:"); - if (personality(current->personality) == PER_LINUX32) { + if (compat) { #ifdef CONFIG_COMPAT for (j = 0; compat_hwcap_str[j]; j++) if (compat_elf_hwcap & (1 << j))