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authorLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 16:31:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 16:31:19 -0800
commit64ad9461521b1a357846ef6cedc4bccd48a046e0 (patch)
treef134404b6c6df89198a4a2f2be6fef21af133c73 /arch/x86/um
parent8e5b0adeea19309c8ce0e3c9119061554973efa9 (diff)
parent9cdbeec4096804083944d05da96bbaf59a1eb4f9 (diff)
Merge tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Borislav Petkov: - Get rid of all the .fixup sections because this generates misleading/wrong stacktraces and confuse RELIABLE_STACKTRACE and LIVEPATCH as the backtrace misses the function which is being fixed up. - Add Straight Line Speculation mitigation support which uses a new compiler switch -mharden-sls= which sticks an INT3 after a RET or an indirect branch in order to block speculation after them. Reportedly, CPUs do speculate behind such insns. - The usual set of cleanups and improvements * tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) x86/entry_32: Fix segment exceptions objtool: Remove .fixup handling x86: Remove .fixup section x86/word-at-a-time: Remove .fixup usage x86/usercopy: Remove .fixup usage x86/usercopy_32: Simplify __copy_user_intel_nocache() x86/sgx: Remove .fixup usage x86/checksum_32: Remove .fixup usage x86/vmx: Remove .fixup usage x86/kvm: Remove .fixup usage x86/segment: Remove .fixup usage x86/fpu: Remove .fixup usage x86/xen: Remove .fixup usage x86/uaccess: Remove .fixup usage x86/futex: Remove .fixup usage x86/msr: Remove .fixup usage x86/extable: Extend extable functionality x86/entry_32: Remove .fixup usage x86/entry_64: Remove .fixup usage x86/copy_mc_64: Remove .fixup usage ...
Diffstat (limited to 'arch/x86/um')
-rw-r--r--arch/x86/um/checksum_32.S4
-rw-r--r--arch/x86/um/setjmp_32.S2
-rw-r--r--arch/x86/um/setjmp_64.S2
3 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/um/checksum_32.S b/arch/x86/um/checksum_32.S
index 13f118dec74f..aed782ab7721 100644
--- a/arch/x86/um/checksum_32.S
+++ b/arch/x86/um/checksum_32.S
@@ -110,7 +110,7 @@ csum_partial:
7:
popl %ebx
popl %esi
- ret
+ RET
#else
@@ -208,7 +208,7 @@ csum_partial:
80:
popl %ebx
popl %esi
- ret
+ RET
#endif
EXPORT_SYMBOL(csum_partial)
diff --git a/arch/x86/um/setjmp_32.S b/arch/x86/um/setjmp_32.S
index 62eaf8c80e04..2d991ddbcca5 100644
--- a/arch/x86/um/setjmp_32.S
+++ b/arch/x86/um/setjmp_32.S
@@ -34,7 +34,7 @@ kernel_setjmp:
movl %esi,12(%edx)
movl %edi,16(%edx)
movl %ecx,20(%edx) # Return address
- ret
+ RET
.size kernel_setjmp,.-kernel_setjmp
diff --git a/arch/x86/um/setjmp_64.S b/arch/x86/um/setjmp_64.S
index 1b5d40d4ff46..b46acb6a8ebd 100644
--- a/arch/x86/um/setjmp_64.S
+++ b/arch/x86/um/setjmp_64.S
@@ -33,7 +33,7 @@ kernel_setjmp:
movq %r14,40(%rdi)
movq %r15,48(%rdi)
movq %rsi,56(%rdi) # Return address
- ret
+ RET
.size kernel_setjmp,.-kernel_setjmp