diff mbox series

[v1,11/20] arm64: enable ARCH_HAS_PKEYS on arm64

Message ID 20230927140123.5283-12-joey.gouly@arm.com
State New
Headers show
Series Permission Overlay Extension | expand

Commit Message

Joey Gouly Sept. 27, 2023, 2:01 p.m. UTC 
Enable the ARCH_HAS_PKEYS config, but provide dummy
functions for the entire interface.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
 arch/arm64/Kconfig             |  1 +
 arch/arm64/include/asm/pkeys.h | 54 ++++++++++++++++++++++++++++++++++
 arch/arm64/mm/mmu.c            |  5 ++++
 3 files changed, 60 insertions(+)
 create mode 100644 arch/arm64/include/asm/pkeys.h

Comments

kernel test robot Sept. 30, 2023, 1:05 p.m. UTC | #1 
Hi Joey,

kernel test robot noticed the following build errors:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on linus/master v6.6-rc3 next-20230929]
[cannot apply to akpm-mm/mm-everything kvmarm/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Joey-Gouly/arm64-sysreg-add-system-register-POR_EL-0-1/20230927-221459
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20230927140123.5283-12-joey.gouly%40arm.com
patch subject: [PATCH v1 11/20] arm64: enable ARCH_HAS_PKEYS on arm64
config: arm64-randconfig-001-20230930 (https://download.01.org/0day-ci/archive/20230930/202309302050.SO3QXUkm-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230930/202309302050.SO3QXUkm-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309302050.SO3QXUkm-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/arm64/include/asm/hwcap.h:50,
                    from arch/arm64/include/asm/cpufeature.h:12,
                    from arch/arm64/include/asm/ptrace.h:11,
                    from arch/arm64/include/asm/irqflags.h:10,
                    from include/linux/irqflags.h:17,
                    from include/linux/spinlock.h:59,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/mm.h:7,
                    from include/linux/pagewalk.h:5,
                    from fs/proc/task_mmu.c:2:
   fs/proc/task_mmu.c: In function 'show_smap_vma_flags':
   include/linux/mm.h:346:25: error: 'VM_HIGH_ARCH_2' undeclared (first use in this function)
     346 | # define VM_PKEY_BIT0   VM_HIGH_ARCH_2  /* A protection key is a 3-bit value on arm64 */
         |                         ^~~~~~~~~~~~~~
   include/linux/log2.h:158:30: note: in definition of macro 'ilog2'
     158 |         __builtin_constant_p(n) ?       \
         |                              ^
   fs/proc/task_mmu.c:689:24: note: in expansion of macro 'VM_PKEY_BIT0'
     689 |                 [ilog2(VM_PKEY_BIT0)]   = "",
         |                        ^~~~~~~~~~~~
   include/linux/mm.h:346:25: note: each undeclared identifier is reported only once for each function it appears in
     346 | # define VM_PKEY_BIT0   VM_HIGH_ARCH_2  /* A protection key is a 3-bit value on arm64 */
         |                         ^~~~~~~~~~~~~~
   include/linux/log2.h:158:30: note: in definition of macro 'ilog2'
     158 |         __builtin_constant_p(n) ?       \
         |                              ^
   fs/proc/task_mmu.c:689:24: note: in expansion of macro 'VM_PKEY_BIT0'
     689 |                 [ilog2(VM_PKEY_BIT0)]   = "",
         |                        ^~~~~~~~~~~~
>> include/linux/log2.h:157:1: error: array index in initializer not of integer type
     157 | ( \
         | ^
   fs/proc/task_mmu.c:689:18: note: in expansion of macro 'ilog2'
     689 |                 [ilog2(VM_PKEY_BIT0)]   = "",
         |                  ^~~~~
   include/linux/log2.h:157:1: note: (near initialization for 'mnemonics')
     157 | ( \
         | ^
   fs/proc/task_mmu.c:689:18: note: in expansion of macro 'ilog2'
     689 |                 [ilog2(VM_PKEY_BIT0)]   = "",
         |                  ^~~~~
   include/linux/mm.h:347:25: error: 'VM_HIGH_ARCH_3' undeclared (first use in this function)
     347 | # define VM_PKEY_BIT1   VM_HIGH_ARCH_3
         |                         ^~~~~~~~~~~~~~
   include/linux/log2.h:158:30: note: in definition of macro 'ilog2'
     158 |         __builtin_constant_p(n) ?       \
         |                              ^
   fs/proc/task_mmu.c:690:24: note: in expansion of macro 'VM_PKEY_BIT1'
     690 |                 [ilog2(VM_PKEY_BIT1)]   = "",
         |                        ^~~~~~~~~~~~
>> include/linux/log2.h:157:1: error: array index in initializer not of integer type
     157 | ( \
         | ^
   fs/proc/task_mmu.c:690:18: note: in expansion of macro 'ilog2'
     690 |                 [ilog2(VM_PKEY_BIT1)]   = "",
         |                  ^~~~~
   include/linux/log2.h:157:1: note: (near initialization for 'mnemonics')
     157 | ( \
         | ^
   fs/proc/task_mmu.c:690:18: note: in expansion of macro 'ilog2'
     690 |                 [ilog2(VM_PKEY_BIT1)]   = "",
         |                  ^~~~~
   include/linux/mm.h:348:25: error: 'VM_HIGH_ARCH_4' undeclared (first use in this function)
     348 | # define VM_PKEY_BIT2   VM_HIGH_ARCH_4
         |                         ^~~~~~~~~~~~~~
   include/linux/log2.h:158:30: note: in definition of macro 'ilog2'
     158 |         __builtin_constant_p(n) ?       \
         |                              ^
   fs/proc/task_mmu.c:691:24: note: in expansion of macro 'VM_PKEY_BIT2'
     691 |                 [ilog2(VM_PKEY_BIT2)]   = "",
         |                        ^~~~~~~~~~~~
>> include/linux/log2.h:157:1: error: array index in initializer not of integer type
     157 | ( \
         | ^
   fs/proc/task_mmu.c:691:18: note: in expansion of macro 'ilog2'
     691 |                 [ilog2(VM_PKEY_BIT2)]   = "",
         |                  ^~~~~
   include/linux/log2.h:157:1: note: (near initialization for 'mnemonics')
     157 | ( \
         | ^
   fs/proc/task_mmu.c:691:18: note: in expansion of macro 'ilog2'
     691 |                 [ilog2(VM_PKEY_BIT2)]   = "",
         |                  ^~~~~


vim +157 include/linux/log2.h

b311e921b385b5a Robert P. J. Day 2007-10-16   69  
f0d1b0b30d250a0 David Howells    2006-12-08   70  /**
dbef91ec5482239 Martin Wilck     2018-04-18   71   * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
a1c4d24e02d093e Randy Dunlap     2017-09-30   72   * @n: parameter
f0d1b0b30d250a0 David Howells    2006-12-08   73   *
dbef91ec5482239 Martin Wilck     2018-04-18   74   * Use this where sparse expects a true constant expression, e.g. for array
dbef91ec5482239 Martin Wilck     2018-04-18   75   * indices.
f0d1b0b30d250a0 David Howells    2006-12-08   76   */
dbef91ec5482239 Martin Wilck     2018-04-18   77  #define const_ilog2(n)				\
f0d1b0b30d250a0 David Howells    2006-12-08   78  (						\
f0d1b0b30d250a0 David Howells    2006-12-08   79  	__builtin_constant_p(n) ? (		\
474c90156c8dcc2 Linus Torvalds   2017-03-02   80  		(n) < 2 ? 0 :			\
f0d1b0b30d250a0 David Howells    2006-12-08   81  		(n) & (1ULL << 63) ? 63 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   82  		(n) & (1ULL << 62) ? 62 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   83  		(n) & (1ULL << 61) ? 61 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   84  		(n) & (1ULL << 60) ? 60 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   85  		(n) & (1ULL << 59) ? 59 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   86  		(n) & (1ULL << 58) ? 58 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   87  		(n) & (1ULL << 57) ? 57 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   88  		(n) & (1ULL << 56) ? 56 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   89  		(n) & (1ULL << 55) ? 55 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   90  		(n) & (1ULL << 54) ? 54 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   91  		(n) & (1ULL << 53) ? 53 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   92  		(n) & (1ULL << 52) ? 52 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   93  		(n) & (1ULL << 51) ? 51 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   94  		(n) & (1ULL << 50) ? 50 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   95  		(n) & (1ULL << 49) ? 49 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   96  		(n) & (1ULL << 48) ? 48 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   97  		(n) & (1ULL << 47) ? 47 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   98  		(n) & (1ULL << 46) ? 46 :	\
f0d1b0b30d250a0 David Howells    2006-12-08   99  		(n) & (1ULL << 45) ? 45 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  100  		(n) & (1ULL << 44) ? 44 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  101  		(n) & (1ULL << 43) ? 43 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  102  		(n) & (1ULL << 42) ? 42 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  103  		(n) & (1ULL << 41) ? 41 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  104  		(n) & (1ULL << 40) ? 40 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  105  		(n) & (1ULL << 39) ? 39 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  106  		(n) & (1ULL << 38) ? 38 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  107  		(n) & (1ULL << 37) ? 37 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  108  		(n) & (1ULL << 36) ? 36 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  109  		(n) & (1ULL << 35) ? 35 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  110  		(n) & (1ULL << 34) ? 34 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  111  		(n) & (1ULL << 33) ? 33 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  112  		(n) & (1ULL << 32) ? 32 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  113  		(n) & (1ULL << 31) ? 31 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  114  		(n) & (1ULL << 30) ? 30 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  115  		(n) & (1ULL << 29) ? 29 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  116  		(n) & (1ULL << 28) ? 28 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  117  		(n) & (1ULL << 27) ? 27 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  118  		(n) & (1ULL << 26) ? 26 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  119  		(n) & (1ULL << 25) ? 25 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  120  		(n) & (1ULL << 24) ? 24 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  121  		(n) & (1ULL << 23) ? 23 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  122  		(n) & (1ULL << 22) ? 22 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  123  		(n) & (1ULL << 21) ? 21 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  124  		(n) & (1ULL << 20) ? 20 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  125  		(n) & (1ULL << 19) ? 19 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  126  		(n) & (1ULL << 18) ? 18 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  127  		(n) & (1ULL << 17) ? 17 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  128  		(n) & (1ULL << 16) ? 16 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  129  		(n) & (1ULL << 15) ? 15 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  130  		(n) & (1ULL << 14) ? 14 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  131  		(n) & (1ULL << 13) ? 13 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  132  		(n) & (1ULL << 12) ? 12 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  133  		(n) & (1ULL << 11) ? 11 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  134  		(n) & (1ULL << 10) ? 10 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  135  		(n) & (1ULL <<  9) ?  9 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  136  		(n) & (1ULL <<  8) ?  8 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  137  		(n) & (1ULL <<  7) ?  7 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  138  		(n) & (1ULL <<  6) ?  6 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  139  		(n) & (1ULL <<  5) ?  5 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  140  		(n) & (1ULL <<  4) ?  4 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  141  		(n) & (1ULL <<  3) ?  3 :	\
f0d1b0b30d250a0 David Howells    2006-12-08  142  		(n) & (1ULL <<  2) ?  2 :	\
474c90156c8dcc2 Linus Torvalds   2017-03-02  143  		1) :				\
dbef91ec5482239 Martin Wilck     2018-04-18  144  	-1)
dbef91ec5482239 Martin Wilck     2018-04-18  145  
dbef91ec5482239 Martin Wilck     2018-04-18  146  /**
dbef91ec5482239 Martin Wilck     2018-04-18  147   * ilog2 - log base 2 of 32-bit or a 64-bit unsigned value
dbef91ec5482239 Martin Wilck     2018-04-18  148   * @n: parameter
dbef91ec5482239 Martin Wilck     2018-04-18  149   *
dbef91ec5482239 Martin Wilck     2018-04-18  150   * constant-capable log of base 2 calculation
dbef91ec5482239 Martin Wilck     2018-04-18  151   * - this can be used to initialise global variables from constant data, hence
dbef91ec5482239 Martin Wilck     2018-04-18  152   * the massive ternary operator construction
dbef91ec5482239 Martin Wilck     2018-04-18  153   *
dbef91ec5482239 Martin Wilck     2018-04-18  154   * selects the appropriately-sized optimised version depending on sizeof(n)
dbef91ec5482239 Martin Wilck     2018-04-18  155   */
dbef91ec5482239 Martin Wilck     2018-04-18  156  #define ilog2(n) \
dbef91ec5482239 Martin Wilck     2018-04-18 @157  ( \
dbef91ec5482239 Martin Wilck     2018-04-18  158  	__builtin_constant_p(n) ?	\
2f78788b55baa34 Jakub Jelinek    2020-12-15  159  	((n) < 2 ? 0 :			\
2f78788b55baa34 Jakub Jelinek    2020-12-15  160  	 63 - __builtin_clzll(n)) :	\
f0d1b0b30d250a0 David Howells    2006-12-08  161  	(sizeof(n) <= 4) ?		\
f0d1b0b30d250a0 David Howells    2006-12-08  162  	__ilog2_u32(n) :		\
f0d1b0b30d250a0 David Howells    2006-12-08  163  	__ilog2_u64(n)			\
f0d1b0b30d250a0 David Howells    2006-12-08  164   )
f0d1b0b30d250a0 David Howells    2006-12-08  165
diff mbox series

Patch

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b10515c0200b..c941259e0117 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -34,6 +34,7 @@  config ARM64
 	select ARCH_HAS_MEMBARRIER_SYNC_CORE
 	select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
 	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
+	select ARCH_HAS_PKEYS
 	select ARCH_HAS_PTE_DEVMAP
 	select ARCH_HAS_PTE_SPECIAL
 	select ARCH_HAS_SETUP_DMA_OPS
diff --git a/arch/arm64/include/asm/pkeys.h b/arch/arm64/include/asm/pkeys.h
new file mode 100644
index 000000000000..5761fb48fd53
--- /dev/null
+++ b/arch/arm64/include/asm/pkeys.h
@@ -0,0 +1,54 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 Arm Ltd.
+ *
+ * Based on arch/x86/include/asm/pkeys.h
+*/
+
+#ifndef _ASM_ARM64_PKEYS_H
+#define _ASM_ARM64_PKEYS_H
+
+#define ARCH_VM_PKEY_FLAGS (VM_PKEY_BIT0 | VM_PKEY_BIT1 | VM_PKEY_BIT2)
+
+#define arch_max_pkey() 0
+
+int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
+		unsigned long init_val);
+
+static inline bool arch_pkeys_enabled(void)
+{
+	return false;
+}
+
+static inline int vma_pkey(struct vm_area_struct *vma)
+{
+	return -1;
+}
+
+static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma,
+		int prot, int pkey)
+{
+	return -1;
+}
+
+static inline int execute_only_pkey(struct mm_struct *mm)
+{
+	return -1;
+}
+
+static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
+{
+	return false;
+}
+
+static inline int mm_pkey_alloc(struct mm_struct *mm)
+{
+	return -1;
+}
+
+static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
+{
+	return -EINVAL;
+}
+
+#endif /* _ASM_ARM64_PKEYS_H */
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 47781bec6171..3b7f354a3ec3 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1487,3 +1487,8 @@  void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte
 {
 	set_pte_at(vma->vm_mm, addr, ptep, pte);
 }
+
+int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, unsigned long init_val)
+{
+	return -ENOSPC;
+}