Pawan Gupta dbd8f170af x86/its: Add support for ITS-safe return thunk ... commit a75bf27fe4 upstream. RETs in the lower half of cacheline may be affected by ITS bug, specifically when the RSB-underflows. Use ITS-safe return thunk for such RETs. RETs that are not patched: - RET in retpoline sequence does not need to be patched, because the sequence itself fills an RSB before RET. - RET in Call Depth Tracking (CDT) thunks __x86_indirect_{call|jump}_thunk and call_depth_return_thunk are not patched because CDT by design prevents RSB-underflow. - RETs in .init section are not reachable after init. - RETs that are explicitly marked safe with ANNOTATE_UNRET_SAFE. Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-05-18 08:21:26 +02:00
..
.gitignore
atomic64_32.c
atomic64_386_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
atomic64_cx8_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
cache-smp.c
checksum_32.S	x86/checksum_32: Remove .fixup usage	2021-12-11 09:09:49 +01:00
clear_page_64.S	x86: fix clear_user_rep_good() exception handling annotation	2023-05-17 11:53:59 +02:00
cmdline.c
cmpxchg8b_emu.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
cmpxchg16b_emu.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
copy_mc_64.S	x86/copy_mc_64: Remove .fixup usage	2021-12-11 09:09:46 +01:00
copy_mc.c	iov_iter, x86: Be consistent about the __user tag on copy_mc_to_user()	2023-11-20 11:51:49 +01:00
copy_page_64.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
copy_user_64.S	x86/uaccess: Don't jump between functions	2022-04-19 21:58:53 +02:00
cpu.c
csum-copy_64.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
csum-partial_64.c	uml/x86: use x86 load_unaligned_zeropad()	2022-01-30 21:26:39 -05:00
csum-wrappers_64.c	net: unexport csum_and_copy_{from,to}_user	2022-04-29 14:37:59 -07:00
delay.c	x86/delay: Fix the wrong asm constraint in delay_loop()	2022-04-05 21:21:57 +02:00
error-inject.c	x86/ibt: Annotate text references	2022-03-15 10:32:40 +01:00
getuser.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
hweight.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
inat.c	x86/insn: Add a __ignore_sync_check__ marker	2021-03-15 11:00:57 +01:00
insn-eval.c	x86/32: Remove lazy GS macros	2022-04-14 14:09:43 +02:00
insn.c	x86/insn: Use get_unaligned() instead of memcpy()	2021-10-06 11:56:37 +02:00
iomap_copy_64.S	x86/asm: Fix an assembler warning with current binutils	2023-01-24 07:24:31 +01:00
iomem.c	x86/kmsan: Fix hook for unaligned accesses	2024-09-12 11:10:19 +02:00
kaslr.c	x86/kaslr: Fix build warning in KASLR code in boot stub	2022-04-11 09:41:12 +02:00
Makefile	x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN	2022-10-03 14:03:24 -07:00
memcpy_32.c	fortify: Detect struct member overflows in memmove() at compile-time	2022-02-13 16:50:06 -08:00
memcpy_64.S	x86: Add types to indirectly called assembly functions	2022-09-26 10:13:15 -07:00
memmove_64.S	x86: Use return-thunk in asm code	2022-06-27 10:33:58 +02:00
memset_64.S	x86: clean up symbol aliasing	2022-02-22 16:21:34 +00:00
misc.c	x86/lib: Fix overflow when counting digits	2024-01-25 15:27:18 -08:00
msr-reg-export.c
msr-reg.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
msr-smp.c	x86/msr: Fix wr/rdmsr_safe_regs_on_cpu() prototypes	2021-03-22 21:37:03 +01:00
msr.c	x86/msr: Make locally used functions static	2021-04-08 11:57:40 +02:00
pc-conf-reg.c	x86: Add support for 0x22/0x23 port I/O configuration space	2021-08-10 23:31:43 +02:00
putuser.S	x86/uaccess: Add ENDBR to __put_user_nocheck*()	2022-04-19 21:58:49 +02:00
retpoline.S	x86/its: Add support for ITS-safe return thunk	2025-05-18 08:21:26 +02:00
string_32.c	lib/string: Move helper functions out of string.c	2021-09-25 08:20:49 -07:00
strstr_32.c
usercopy_32.c	x86/usercopy: Remove .fixup usage	2021-12-11 09:09:50 +01:00
usercopy_64.c	x86/clear_user: Make it faster	2022-08-18 12:36:42 +02:00
usercopy.c	x86/uaccess: instrument copy_from_user_nmi()	2022-11-08 15:57:24 -08:00
x86-opcode-map.txt	x86/insn: Add VEX versions of VPDPBUSD, VPDPBUSDS, VPDPWSSD and VPDPWSSDS	2024-06-12 11:03:30 +02:00