This is a note to let you know that I've just added the patch titled
arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-provide-model-name-in-proc-cpuinfo-for-per_linux32-tasks.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e47b020a323d1b2a7b1e9aac86e99eae19463630 Mon Sep 17 00:00:00 2001
From: Catalin Marinas <catalin.marinas@xxxxxxx>
Date: Tue, 31 May 2016 15:55:03 +0100
Subject: arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks
From: Catalin Marinas <catalin.marinas@xxxxxxx>
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 <will.deacon@xxxxxxx>
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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))
Patches currently in stable-queue which might be from catalin.marinas@xxxxxxx are
queue-4.4/arm64-provide-model-name-in-proc-cpuinfo-for-per_linux32-tasks.patch
queue-4.4/arm64-mm-always-take-dirty-state-from-new-pte-in-ptep_set_access_flags.patch
--
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