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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /arch/arm/lib/getuser.S
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'arch/arm/lib/getuser.S')
-rw-r--r--arch/arm/lib/getuser.S167
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S
new file mode 100644
index 000000000..c5e420750
--- /dev/null
+++ b/arch/arm/lib/getuser.S
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/arch/arm/lib/getuser.S
+ *
+ * Copyright (C) 2001 Russell King
+ *
+ * Idea from x86 version, (C) Copyright 1998 Linus Torvalds
+ *
+ * These functions have a non-standard call interface to make them more
+ * efficient, especially as they return an error value in addition to
+ * the "real" return value.
+ *
+ * __get_user_X
+ *
+ * Inputs: r0 contains the address
+ * r1 contains the address limit, which must be preserved
+ * Outputs: r0 is the error code
+ * r2, r3 contains the zero-extended value
+ * lr corrupted
+ *
+ * No other registers must be altered. (see <asm/uaccess.h>
+ * for specific ASM register usage).
+ *
+ * Note that ADDR_LIMIT is either 0 or 0xc0000000.
+ * Note also that it is intended that __get_user_bad is not global.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/errno.h>
+#include <asm/domain.h>
+
+ENTRY(__get_user_1)
+ check_uaccess r0, 1, r1, r2, __get_user_bad
+1: TUSER(ldrb) r2, [r0]
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_1)
+_ASM_NOKPROBE(__get_user_1)
+
+ENTRY(__get_user_2)
+ check_uaccess r0, 2, r1, r2, __get_user_bad
+#if __LINUX_ARM_ARCH__ >= 6
+
+2: TUSER(ldrh) r2, [r0]
+
+#else
+
+#ifdef CONFIG_CPU_USE_DOMAINS
+rb .req ip
+2: ldrbt r2, [r0], #1
+3: ldrbt rb, [r0], #0
+#else
+rb .req r0
+2: ldrb r2, [r0]
+3: ldrb rb, [r0, #1]
+#endif
+#ifndef __ARMEB__
+ orr r2, r2, rb, lsl #8
+#else
+ orr r2, rb, r2, lsl #8
+#endif
+
+#endif /* __LINUX_ARM_ARCH__ >= 6 */
+
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_2)
+_ASM_NOKPROBE(__get_user_2)
+
+ENTRY(__get_user_4)
+ check_uaccess r0, 4, r1, r2, __get_user_bad
+4: TUSER(ldr) r2, [r0]
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_4)
+_ASM_NOKPROBE(__get_user_4)
+
+ENTRY(__get_user_8)
+ check_uaccess r0, 8, r1, r2, __get_user_bad8
+#ifdef CONFIG_THUMB2_KERNEL
+5: TUSER(ldr) r2, [r0]
+6: TUSER(ldr) r3, [r0, #4]
+#else
+5: TUSER(ldr) r2, [r0], #4
+6: TUSER(ldr) r3, [r0]
+#endif
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_8)
+_ASM_NOKPROBE(__get_user_8)
+
+#ifdef __ARMEB__
+ENTRY(__get_user_32t_8)
+ check_uaccess r0, 8, r1, r2, __get_user_bad
+#ifdef CONFIG_CPU_USE_DOMAINS
+ add r0, r0, #4
+7: ldrt r2, [r0]
+#else
+7: ldr r2, [r0, #4]
+#endif
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_32t_8)
+_ASM_NOKPROBE(__get_user_32t_8)
+
+ENTRY(__get_user_64t_1)
+ check_uaccess r0, 1, r1, r2, __get_user_bad8
+8: TUSER(ldrb) r3, [r0]
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_64t_1)
+_ASM_NOKPROBE(__get_user_64t_1)
+
+ENTRY(__get_user_64t_2)
+ check_uaccess r0, 2, r1, r2, __get_user_bad8
+#ifdef CONFIG_CPU_USE_DOMAINS
+rb .req ip
+9: ldrbt r3, [r0], #1
+10: ldrbt rb, [r0], #0
+#else
+rb .req r0
+9: ldrb r3, [r0]
+10: ldrb rb, [r0, #1]
+#endif
+ orr r3, rb, r3, lsl #8
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_64t_2)
+_ASM_NOKPROBE(__get_user_64t_2)
+
+ENTRY(__get_user_64t_4)
+ check_uaccess r0, 4, r1, r2, __get_user_bad8
+11: TUSER(ldr) r3, [r0]
+ mov r0, #0
+ ret lr
+ENDPROC(__get_user_64t_4)
+_ASM_NOKPROBE(__get_user_64t_4)
+#endif
+
+__get_user_bad8:
+ mov r3, #0
+__get_user_bad:
+ mov r2, #0
+ mov r0, #-EFAULT
+ ret lr
+ENDPROC(__get_user_bad)
+ENDPROC(__get_user_bad8)
+_ASM_NOKPROBE(__get_user_bad)
+_ASM_NOKPROBE(__get_user_bad8)
+
+.pushsection __ex_table, "a"
+ .long 1b, __get_user_bad
+ .long 2b, __get_user_bad
+#if __LINUX_ARM_ARCH__ < 6
+ .long 3b, __get_user_bad
+#endif
+ .long 4b, __get_user_bad
+ .long 5b, __get_user_bad8
+ .long 6b, __get_user_bad8
+#ifdef __ARMEB__
+ .long 7b, __get_user_bad
+ .long 8b, __get_user_bad8
+ .long 9b, __get_user_bad8
+ .long 10b, __get_user_bad8
+ .long 11b, __get_user_bad8
+#endif
+.popsection