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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-12 16:31:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-12 16:31:19 -0800 |
| commit | 64ad9461521b1a357846ef6cedc4bccd48a046e0 (patch) | |
| tree | f134404b6c6df89198a4a2f2be6fef21af133c73 /arch/x86/xen | |
| parent | Merge tag 'perf_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
| parent | x86/entry_32: Fix segment exceptions (diff) | |
| download | linux-dev-64ad9461521b1a357846ef6cedc4bccd48a046e0.tar.xz linux-dev-64ad9461521b1a357846ef6cedc4bccd48a046e0.zip | |
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/xen')
| -rw-r--r-- | arch/x86/xen/xen-asm.S | 12 | ||||
| -rw-r--r-- | arch/x86/xen/xen-head.S | 2 |
2 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S index 444d824775f6..e730e6200e64 100644 --- a/arch/x86/xen/xen-asm.S +++ b/arch/x86/xen/xen-asm.S @@ -29,7 +29,7 @@ */ SYM_FUNC_START(xen_irq_disable_direct) movb $1, PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_mask - ret + RET SYM_FUNC_END(xen_irq_disable_direct) /* @@ -58,7 +58,7 @@ SYM_FUNC_START(check_events) pop %rcx pop %rax FRAME_END - ret + RET SYM_FUNC_END(check_events) /* @@ -84,7 +84,7 @@ SYM_FUNC_START(xen_irq_enable_direct) call check_events 1: FRAME_END - ret + RET SYM_FUNC_END(xen_irq_enable_direct) /* @@ -100,7 +100,7 @@ SYM_FUNC_START(xen_save_fl_direct) testb $0xff, PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_mask setz %ah addb %ah, %ah - ret + RET SYM_FUNC_END(xen_save_fl_direct) SYM_FUNC_START(xen_read_cr2) @@ -108,14 +108,14 @@ SYM_FUNC_START(xen_read_cr2) _ASM_MOV PER_CPU_VAR(xen_vcpu), %_ASM_AX _ASM_MOV XEN_vcpu_info_arch_cr2(%_ASM_AX), %_ASM_AX FRAME_END - ret + RET SYM_FUNC_END(xen_read_cr2); SYM_FUNC_START(xen_read_cr2_direct) FRAME_BEGIN _ASM_MOV PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_arch_cr2, %_ASM_AX FRAME_END - ret + RET SYM_FUNC_END(xen_read_cr2_direct); .popsection diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 6a64496edefb..11d286529fe5 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -26,7 +26,7 @@ SYM_CODE_START(hypercall_page) .rept (PAGE_SIZE / 32) UNWIND_HINT_FUNC .skip 31, 0x90 - ret + RET .endr #define HYPERCALL(n) \ |