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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-23 18:43:04 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-23 18:43:04 +0100 |
| commit | d82924c3b8d0607094b94fab290a33c5ad7d586c (patch) | |
| tree | 2afbc9066262b5987c8568a09f80db5198025689 /arch/x86/xen | |
| parent | d7197a5ad8528642cb70f1d27d4d5c7332a2b395 (diff) | |
| parent | bb4b3b7762735cdaba5a40fd94c9303d9ffa147a (diff) | |
| download | linux-d82924c3b8d0607094b94fab290a33c5ad7d586c.tar.bz2 | |
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 pti updates from Ingo Molnar:
"The main changes:
- Make the IBPB barrier more strict and add STIBP support (Jiri
Kosina)
- Micro-optimize and clean up the entry code (Andy Lutomirski)
- ... plus misc other fixes"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/speculation: Propagate information about RSB filling mitigation to sysfs
x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation
x86/speculation: Apply IBPB more strictly to avoid cross-process data leak
x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant
x86/CPU: Fix unused variable warning when !CONFIG_IA32_EMULATION
x86/pti/64: Remove the SYSCALL64 entry trampoline
x86/entry/64: Use the TSS sp2 slot for SYSCALL/SYSRET scratch space
x86/entry/64: Document idtentry
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/xen-asm_64.S | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S index 417b339e5c8e..bb1c2da0381d 100644 --- a/arch/x86/xen/xen-asm_64.S +++ b/arch/x86/xen/xen-asm_64.S @@ -91,13 +91,15 @@ ENTRY(xen_iret) ENTRY(xen_sysret64) /* * We're already on the usermode stack at this point, but - * still with the kernel gs, so we can easily switch back + * still with the kernel gs, so we can easily switch back. + * + * tss.sp2 is scratch space. */ - movq %rsp, PER_CPU_VAR(rsp_scratch) + movq %rsp, PER_CPU_VAR(cpu_tss_rw + TSS_sp2) movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp pushq $__USER_DS - pushq PER_CPU_VAR(rsp_scratch) + pushq PER_CPU_VAR(cpu_tss_rw + TSS_sp2) pushq %r11 pushq $__USER_CS pushq %rcx |