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author | Peter Zijlstra <peterz@infradead.org> | 2020-07-08 11:38:59 +0200 |
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committer | Peter Zijlstra <peterz@infradead.org> | 2020-07-08 11:38:59 +0200 |
commit | faa2fd7cbad4609d06d7904c0a80cf2f8cd23678 (patch) | |
tree | 3a5bfcc8879b719aec97cb73ed6e020cde502546 /arch/x86/xen/xen-asm_64.S | |
parent | sched/core: Remove mmdrop() definition (diff) | |
parent | sched: Fix unreliable rseq cpu_id for new tasks (diff) | |
download | wireguard-linux-faa2fd7cbad4609d06d7904c0a80cf2f8cd23678.tar.xz wireguard-linux-faa2fd7cbad4609d06d7904c0a80cf2f8cd23678.zip |
Merge branch 'sched/urgent'
Diffstat (limited to 'arch/x86/xen/xen-asm_64.S')
-rw-r--r-- | arch/x86/xen/xen-asm_64.S | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S index 5d252aaeade8..aab1d99b2b48 100644 --- a/arch/x86/xen/xen-asm_64.S +++ b/arch/x86/xen/xen-asm_64.S @@ -29,10 +29,9 @@ _ASM_NOKPROBE(xen_\name) .endm xen_pv_trap asm_exc_divide_error -xen_pv_trap asm_exc_debug -xen_pv_trap asm_exc_xendebug +xen_pv_trap asm_xenpv_exc_debug xen_pv_trap asm_exc_int3 -xen_pv_trap asm_exc_xennmi +xen_pv_trap asm_xenpv_exc_nmi xen_pv_trap asm_exc_overflow xen_pv_trap asm_exc_bounds xen_pv_trap asm_exc_invalid_op @@ -161,10 +160,22 @@ SYM_FUNC_END(xen_syscall32_target) /* 32-bit compat sysenter target */ SYM_FUNC_START(xen_sysenter_target) - mov 0*8(%rsp), %rcx - mov 1*8(%rsp), %r11 - mov 5*8(%rsp), %rsp - jmp entry_SYSENTER_compat + /* + * NB: Xen is polite and clears TF from EFLAGS for us. This means + * that we don't need to guard against single step exceptions here. + */ + popq %rcx + popq %r11 + + /* + * Neither Xen nor the kernel really knows what the old SS and + * CS were. The kernel expects __USER32_DS and __USER32_CS, so + * report those values even though Xen will guess its own values. + */ + movq $__USER32_DS, 4*8(%rsp) + movq $__USER32_CS, 1*8(%rsp) + + jmp entry_SYSENTER_compat_after_hwframe SYM_FUNC_END(xen_sysenter_target) #else /* !CONFIG_IA32_EMULATION */ |