summaryrefslogtreecommitdiffstats
path: root/arch/arm/mm/fault.h
diff options
context:
space:
mode:
authorSang-Heon Jeon <ekffu200098@gmail.com>2026-08-24 01:18:14 +0900
committerJulia Lawall <Julia.Lawall@inria.fr>2026-08-23 22:12:11 +0200
commit2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c (patch)
treedcc4da1d99f17541c5590ac63c77da4bf372a4ab /arch/arm/mm/fault.h
downloadlinux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.tar.gz
linux-stable-2bd30b8dc75b823dd7bbef9d7bc68e1fd7ecee5c.zip
coccinelle: alloc_cast: drop removed allocatorsgrafted
- pci_alloc_consistent() and pci_zalloc_consistent() were removed by commit 7968778914e5 ("PCI: Remove the deprecated "pci-dma-compat.h" API") - kmem_alloc() was removed by commit f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") - kmem_zalloc() was removed by commit 10634530f7ba ("xfs: convert kmem_zalloc() to kzalloc()") - kmem_zone_alloc() and kmem_zone_zalloc() were removed by commit bae633a4a283 ("xfs: remove xfs_zone_{alloc,zalloc} helpers") So drop them from the rules. No functional change. Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'arch/arm/mm/fault.h')
-rw-r--r--arch/arm/mm/fault.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h
new file mode 100644
index 000000000..207f1b069
--- /dev/null
+++ b/arch/arm/mm/fault.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ARCH_ARM_FAULT_H
+#define __ARCH_ARM_FAULT_H
+
+/*
+ * Fault status register encodings. We steal bit 31 for our own purposes.
+ */
+#define FSR_LNX_PF BIT(31)
+#define FSR_CM BIT(13)
+#define FSR_WRITE BIT(11)
+
+#ifdef CONFIG_ARM_LPAE
+#define FSR_FS_AEA 17
+#define FS_TRANS_NOLL 0x4
+#define FS_PERM_NOLL 0xC
+#define FS_MMU_NOLL_MASK 0x3C
+
+#define FSR_FS5_0 GENMASK(5, 0)
+
+static inline int fsr_fs(unsigned int fsr)
+{
+ return fsr & FSR_FS5_0;
+}
+
+static inline bool is_translation_fault(unsigned int fsr)
+{
+ int fs = fsr_fs(fsr);
+
+ return (fs & FS_MMU_NOLL_MASK) == FS_TRANS_NOLL;
+}
+
+static inline bool is_permission_fault(unsigned int fsr)
+{
+ int fs = fsr_fs(fsr);
+
+ return (fs & FS_MMU_NOLL_MASK) == FS_PERM_NOLL;
+}
+#else
+#define FSR_FS_AEA 22
+#define FS_L1_TRANS 0x5
+#define FS_L2_TRANS 0x7
+#define FS_L1_PERM 0xD
+#define FS_L2_PERM 0xF
+
+#define FSR_FS4 BIT(10)
+#define FSR_FS3_0 GENMASK(3, 0)
+
+static inline int fsr_fs(unsigned int fsr)
+{
+ return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
+}
+
+static inline bool is_translation_fault(unsigned int fsr)
+{
+ int fs = fsr_fs(fsr);
+
+ return fs == FS_L1_TRANS || fs == FS_L2_TRANS;
+}
+
+static inline bool is_permission_fault(unsigned int fsr)
+{
+ int fs = fsr_fs(fsr);
+
+ return fs == FS_L1_PERM || fs == FS_L2_PERM;
+}
+#endif
+
+void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
+void early_abt_enable(void);
+asmlinkage void do_DataAbort(unsigned long addr, unsigned int fsr,
+ struct pt_regs *regs);
+asmlinkage void do_PrefetchAbort(unsigned long addr, unsigned int ifsr,
+ struct pt_regs *regs);
+
+#endif /* __ARCH_ARM_FAULT_H */