Messages in this thread | | | From | "Li, Xin3" <> | Subject | RE: [PATCH v3 4/6] x86/gsseg: move local_irq_save/restore() into asm_load_gs_index() | Date | Tue, 18 Oct 2022 17:25:31 +0000 |
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> > static inline void native_load_gs_index(unsigned int selector) { > > - unsigned long flags; > > - > > - local_irq_save(flags); > > asm_load_gs_index(selector); > > - local_irq_restore(flags); > > } > > static inline void native_load_gs_index(unsigned int selector) { > unsigned long flags; > > if (cpu_feature_enabled(LKGS)) { > native_lkgs(selector); > } else { > local_irq_save(flags); > asm_load_gs_index(selector); > local_irq_restore(flags); > } > } > > For paravirt enabled kernels we want during feature detection: > > if (cpu_feature_enabled(LKGS))) > pv_ops.cpu.load_gs_index = native_lkgs;
If we use static_cpu_has in native_load_gs_index if (static_cpu_has(X86_FEATURE_LKGS)) { native_lkgs(selector); }
We don't have to change pv_ops.cpu.load_gs_index, right?
Thanks! Xin
> > No? > > Thanks, > > tglx
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