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Date: Sat, 28 Oct 2017 12:55:46 +0200 From: Borislav Petkov <bp@...e.de> To: Juergen Gross <jgross@...e.com> Cc: Vitaly Kuznetsov <vkuznets@...hat.com>, Dou Liyang <douly.fnst@...fujitsu.com>, linux-kernel@...r.kernel.org, x86@...nel.org, xen-devel@...ts.xenproject.org, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, boris.ostrovsky@...cle.com, luto@...nel.org Subject: Re: [PATCH][tip] x86/paravirt: Make the virt_spin_lock_key setup after jump_label_init() On Fri, Oct 27, 2017 at 07:25:04PM +0200, Juergen Gross wrote: > >> This is assuming CPU 0 is the boot cpu. I think you want boot_cpu_data.cpu_index here or whatever is used on xen to identify the BSP reliably. > > > > It seems both PV and PVHVM call xen_init_lock_cpu(0) so 0 here is > > Linux's idea of CPU id, not Xen's. > > > > In case Xen's idea is needed xen_vcpu_id mapping should be used. But I > > don't think it's the case here. > > > > Correct. If it is Linux's idea of the BSP, then you need to check against boot_cpu_data.cpu_index. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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