From 9f0346dcbea363787186c94ef94dd01aaa215afa Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 5 Sep 2026 11:59:05 -0700 Subject: Merge tag 'driver-core-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core Pull driver core fixes from Danilo Krummrich: - Fix kernfs listxattr() not returning security xattr names (e.g. SELinux labels) when the kernfs node has no allocated kernfs_iattrs - Fix silent truncation of IRQ vector indices in the Rust PCI abstractions - Don't select OF from DRIVER_PE_KUNIT_TEST; skip the test when OF is disabled instead of silently enabling extra kernel functionality - Russ Weight is retiring from kernel development; update the Firmware Loader sysfs contact to the driver-core mailing list, add a CREDITS entry for Firmware Upload, and update MAINTAINERS accordingly * tag 'driver-core-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: MAINTAINERS: Remove Russ Weight from Firmware Loader CREDITS: Add CREDITS entry for Firmware Upload firmware_loader: Change contact for sysfs nodes rust: pci: reject IRQ vector indices that do not fit in u32 kernfs: preserve security xattrs without allocating iattrs drivers: base: test: DRIVER_PE_KUNIT_TEST should not select OF --- arch/parisc/lib/memcpy.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 arch/parisc/lib/memcpy.c (limited to 'arch/parisc/lib/memcpy.c') diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c new file mode 100644 index 000000000..03165c82d --- /dev/null +++ b/arch/parisc/lib/memcpy.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Optimized memory copy routines. + * + * Copyright (C) 2004 Randolph Chung + * Copyright (C) 2013-2017 Helge Deller + * + * Portions derived from the GNU C Library + * Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc. + */ + +#include +#include +#include +#include + +#define get_user_space() mfsp(SR_USER) +#define get_kernel_space() SR_KERNEL + +/* Returns 0 for success, otherwise, returns number of bytes not transferred. */ +extern unsigned long pa_memcpy(void *dst, const void *src, + unsigned long len); + +unsigned long raw_copy_to_user(void __user *dst, const void *src, + unsigned long len) +{ + mtsp(get_kernel_space(), SR_TEMP1); + mtsp(get_user_space(), SR_TEMP2); + return pa_memcpy((void __force *)dst, src, len); +} +EXPORT_SYMBOL(raw_copy_to_user); + +unsigned long raw_copy_from_user(void *dst, const void __user *src, + unsigned long len) +{ + unsigned long start = (unsigned long) src; + unsigned long end = start + len; + unsigned long newlen = len; + + mtsp(get_user_space(), SR_TEMP1); + mtsp(get_kernel_space(), SR_TEMP2); + + /* Check region is user accessible */ + while (start < end) { + if (!prober_user(SR_TEMP1, start)) { + newlen = (start - (unsigned long) src); + break; + } + start += PAGE_SIZE; + /* align to page boundry which may have different permission */ + start = PAGE_ALIGN_DOWN(start); + } + return len - newlen + pa_memcpy(dst, (void __force *)src, newlen); +} +EXPORT_SYMBOL(raw_copy_from_user); + +void * memcpy(void * dst,const void *src, size_t count) +{ + mtsp(get_kernel_space(), SR_TEMP1); + mtsp(get_kernel_space(), SR_TEMP2); + pa_memcpy(dst, src, count); + return dst; +} + +EXPORT_SYMBOL(memcpy); + +bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +{ + if ((unsigned long)unsafe_src < PAGE_SIZE) + return false; + /* check for I/O space F_EXTEND(0xfff00000) access as well? */ + return true; +} -- cgit v1.3.1