AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/powerpc/lib
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Paul Mackerras f8db2007ff powerpc/64: Copy as much as possible in __copy_tofrom_user 
In __copy_tofrom_user, if we encounter an exception on a store, we
stop copying and return the number of bytes not copied.  However,
if the store is wider than one byte and is to an unaligned address,
it is possible that the store operand overlaps a page boundary
and the exception occurred on the latter part of the store operand,
meaning that it would be possible to copy a few more bytes.  Since
copy_to_user is generally expected to copy as much as possible,
it would be better to copy those extra few bytes.  This adds code
to do that.  Since this edge case is not performance-critical,
the code has been written to be compact rather than as fast as
possible.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-08-08 00:32:36 +10:00
..
alloc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum_32.S powerpc: Implement csum_ipv6_magic in assembly 2018-06-04 00:39:19 +10:00
checksum_64.S powerpc: Implement csum_ipv6_magic in assembly 2018-06-04 00:39:19 +10:00
checksum_wrappers.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
code-patching.c powerpc/asm: Add a patch_site macro & helpers for patching instructions 2018-08-08 00:32:25 +10:00
copy_32.S powerpc/32: remove a NOP from memset() 2017-09-01 16:42:46 +10:00
copypage_64.S powerpc: clean inclusions of asm/feature-fixups.h 2018-07-30 22:48:17 +10:00
copypage_power7.S powerpc/64: enhance memcmp() with VMX instruction for long bytes comparision 2018-07-24 22:03:21 +10:00
copyuser_64.S powerpc/64: Copy as much as possible in __copy_tofrom_user 2018-08-08 00:32:36 +10:00
copyuser_power7.S selftests/powerpc/64: Test all paths through copy routines 2018-08-08 00:32:35 +10:00
crtsavres.S powerpc/64: Do not create new section for save/restore functions 2017-05-30 14:59:51 +10:00
div64.S powerpc: Fix a corner case in __div64_32 2005-10-20 09:37:02 +10:00
feature-fixups-test.S powerpc: move ASM_CONST and stringify_in_c() into asm-const.h 2018-07-30 22:48:16 +10:00
feature-fixups.c powerpc/fsl: Add barrier_nospec implementation for NXP PowerPC Book3E 2018-08-08 00:32:24 +10:00
hweight_64.S powerpc: clean inclusions of asm/feature-fixups.h 2018-07-30 22:48:17 +10:00
ldstfp.S powerpc: move ASM_CONST and stringify_in_c() into asm-const.h 2018-07-30 22:48:16 +10:00
locks.c powerpc: clean the inclusion of stringify.h 2018-07-30 22:48:17 +10:00
Makefile powerpc/lib: Implement strlen() in assembly for PPC32 2018-08-07 21:49:30 +10:00
mem_64.S powerpc/string: Implement optimized memset variants 2017-08-17 23:04:35 +10:00
memcmp_32.S powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
memcmp_64.S powerpc/64: add 32 bytes prechecking before using VMX optimization on memcmp() 2018-07-24 22:03:21 +10:00
memcpy_64.S selftests/powerpc/64: Test all paths through copy routines 2018-08-08 00:32:35 +10:00
memcpy_power7.S selftests/powerpc/64: Test all paths through copy routines 2018-08-08 00:32:35 +10:00
pmem.c powerpc/lib: Implement UACCESS_FLUSHCACHE API 2017-11-13 08:00:31 +11:00
quad.S powerpc: Handle most loads and stores in instruction emulation code 2017-09-01 16:39:48 +10:00
rheap.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
sstep.c powerpc/sstep: Fix kernel crash if VSX is not present 2018-06-04 00:39:08 +10:00
string_32.S powerpc/lib: optimise 32 bits __clear_user() 2018-06-04 00:39:21 +10:00
string_64.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
string.S powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
strlen_32.S powerpc/lib: Implement strlen() in assembly for PPC32 2018-08-07 21:49:30 +10:00
test_emulate_step.c powerpc/sstep: Fix emulate_step test if VSX not present 2018-06-04 00:39:14 +10:00
vmx-helper.c powerpc/64: enhance memcmp() with VMX instruction for long bytes comparision 2018-07-24 22:03:21 +10:00
xor_vmx_glue.c powerpc/altivec: Add missing prototypes for altivec 2018-05-25 12:04:38 +10:00
xor_vmx.c powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec() 2017-06-02 20:17:52 +10:00
xor_vmx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00