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From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxram@us.ibm.com
Cc: mingo@redhat.com, linuxppc-dev@ozlabs.org, linux-mm@kvack.org,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	dave.hansen@intel.com
Subject: [PATCH 6/8] x86/pkeys: Add arch_pkeys_enabled()
Date: Wed,  9 May 2018 00:59:46 +1000	[thread overview]
Message-ID: <20180508145948.9492-7-mpe@ellerman.id.au> (raw)
In-Reply-To: <20180508145948.9492-1-mpe@ellerman.id.au>

This will be used in future patches to check for arch support for
pkeys in generic code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/x86/include/asm/pkeys.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h
index 0e5f749158e4..c1957f8f7c1b 100644
--- a/arch/x86/include/asm/pkeys.h
+++ b/arch/x86/include/asm/pkeys.h
@@ -7,6 +7,11 @@
 extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
 		unsigned long init_val);
 
+static inline bool arch_pkeys_enabled(void)
+{
+	return boot_cpu_has(X86_FEATURE_OSPKE);
+}
+
 /*
  * Try to dedicate one of the protection keys to be used as an
  * execute-only protection key.
-- 
2.14.1

  parent reply	other threads:[~2018-05-08 15:00 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08 14:59 [PATCH 0/8] mm, x86, powerpc: Consolidate pkey code Michael Ellerman
2018-05-08 14:59 ` [PATCH 1/8] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled Michael Ellerman
2018-05-08 14:59 ` [PATCH 2/8] mm, powerpc, x86: introduce an additional vma bit for powerpc pkey Michael Ellerman
2018-05-08 16:18   ` Ram Pai
2018-05-08 14:59 ` [PATCH 3/8] mm/pkeys: Remove include of asm/mmu_context.h from pkeys.h Michael Ellerman
2018-05-08 14:59 ` [PATCH 4/8] mm/pkeys, powerpc, x86: Provide an empty vma_pkey() in linux/pkeys.h Michael Ellerman
2018-05-08 16:27   ` Ram Pai
2018-05-08 16:45   ` Dave Hansen
2018-05-08 14:59 ` [PATCH 5/8] x86/pkeys: Move vma_pkey() into asm/pkeys.h Michael Ellerman
2018-05-08 16:45   ` Dave Hansen
2018-05-09  1:56     ` Michael Ellerman
2018-05-08 14:59 ` Michael Ellerman [this message]
2018-05-08 14:59 ` [PATCH 7/8] mm/pkeys: Add an empty arch_pkeys_enabled() Michael Ellerman
2018-05-08 14:59 ` [PATCH 8/8] mm/pkeys, x86, powerpc: Display pkey in smaps if arch supports pkeys Michael Ellerman
2018-05-08 16:47   ` Dave Hansen
2018-05-09  1:57     ` Michael Ellerman
2018-05-10 13:54   ` [PATCH 9/8] powerpc/pkeys: Drop private VM_PKEY definitions Michael Ellerman
2018-05-10 20:24     ` Ram Pai

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