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From: Thomas Huth <thuth@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	Arnd Bergmann <arnd@arndb.de>, Nicolas Schier <nicolas@fjasle.eu>,
	Masahiro Yamada <masahiroy@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] x86: Remove the arch_calc_vm_prot_bits() macro from the uapi
Date: Thu,  6 Jul 2023 21:02:17 +0200	[thread overview]
Message-ID: <20230706190217.371721-1-thuth@redhat.com> (raw)

The arch_calc_vm_prot_bits() macro uses VM_PKEY_BIT0 etc. which are
not part of the uapi, so the macro is completely useless for userspace.
It is also hidden behind the CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
config switch which we shouldn't expose to userspace. Thus let's move
this macro into a new internal header instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 arch/x86/include/asm/mman.h      | 15 +++++++++++++++
 arch/x86/include/uapi/asm/mman.h |  8 --------
 scripts/headers_install.sh       |  1 -
 3 files changed, 15 insertions(+), 9 deletions(-)
 create mode 100644 arch/x86/include/asm/mman.h

diff --git a/arch/x86/include/asm/mman.h b/arch/x86/include/asm/mman.h
new file mode 100644
index 0000000000000..12b820259b9f3
--- /dev/null
+++ b/arch/x86/include/asm/mman.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_MMAN_H__
+#define __ASM_MMAN_H__
+
+#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
+#define arch_calc_vm_prot_bits(prot, key) (		\
+		((key) & 0x1 ? VM_PKEY_BIT0 : 0) |      \
+		((key) & 0x2 ? VM_PKEY_BIT1 : 0) |      \
+		((key) & 0x4 ? VM_PKEY_BIT2 : 0) |      \
+		((key) & 0x8 ? VM_PKEY_BIT3 : 0))
+#endif
+
+#include <uapi/asm/mman.h>
+
+#endif /* __ASM_MMAN_H__ */
diff --git a/arch/x86/include/uapi/asm/mman.h b/arch/x86/include/uapi/asm/mman.h
index 775dbd3aff736..a72e4f3e13b17 100644
--- a/arch/x86/include/uapi/asm/mman.h
+++ b/arch/x86/include/uapi/asm/mman.h
@@ -4,14 +4,6 @@
 
 #define MAP_32BIT	0x40		/* only give out 32bit addresses */
 
-#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
-#define arch_calc_vm_prot_bits(prot, key) (		\
-		((key) & 0x1 ? VM_PKEY_BIT0 : 0) |      \
-		((key) & 0x2 ? VM_PKEY_BIT1 : 0) |      \
-		((key) & 0x4 ? VM_PKEY_BIT2 : 0) |      \
-		((key) & 0x8 ? VM_PKEY_BIT3 : 0))
-#endif
-
 #include <asm-generic/mman.h>
 
 #endif /* _ASM_X86_MMAN_H */
diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
index afdddc82f02b3..56d3c338d91d7 100755
--- a/scripts/headers_install.sh
+++ b/scripts/headers_install.sh
@@ -81,7 +81,6 @@ arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_NO
 arch/nios2/include/uapi/asm/swab.h:CONFIG_NIOS2_CI_SWAB_SUPPORT
 arch/x86/include/uapi/asm/auxvec.h:CONFIG_IA32_EMULATION
 arch/x86/include/uapi/asm/auxvec.h:CONFIG_X86_64
-arch/x86/include/uapi/asm/mman.h:CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
 "
 
 for c in $configs
-- 
2.39.3


             reply	other threads:[~2023-07-06 19:03 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-06 19:02 Thomas Huth [this message]
2023-07-06 20:22 ` [PATCH] x86: Remove the arch_calc_vm_prot_bits() macro from the uapi Arnd Bergmann
2023-07-06 20:30   ` Dave Hansen
2023-07-06 20:36     ` Arnd Bergmann
2023-07-07  6:48     ` Thomas Huth
2023-07-07  9:29 ` Nicolas Schier

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