[RFC v5 34/38] procfs: display the protection-key number associated with a vma
From: Ram Pai <hidden>
Date: 2017-07-05 21:24:19
Also in:
linux-arch, linux-mm, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Display the pkey number associated with the vma in smaps of a task. The key will be seen as below: ProtectionKey: 0 Signed-off-by: Ram Pai <redacted> --- arch/powerpc/kernel/setup_64.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index f35ff9d..ebc82b3 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c@@ -37,6 +37,7 @@ #include <linux/memblock.h> #include <linux/memory.h> #include <linux/nmi.h> +#include <linux/pkeys.h> #include <asm/io.h> #include <asm/kdump.h>
@@ -745,3 +746,10 @@ static int __init disable_hardlockup_detector(void) } early_initcall(disable_hardlockup_detector); #endif + +#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS +void arch_show_smap(struct seq_file *m, struct vm_area_struct *vma) +{ + seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma)); +} +#endif /* CONFIG_PPC64_MEMORY_PROTECTION_KEYS */
--
1.7.1