From: Borislav Petkov <bp@suse.de> To: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, xen-devel <xen-devel@lists.xenproject.org> Subject: Re: Can't boot as Xen dom0 due to commit fe055896 Date: Thu, 15 Dec 2016 18:36:09 +0100 [thread overview] Message-ID: <20161215173609.ornfok6lk5oro2pj@pd.tnic> (raw) In-Reply-To: <d92fb691-6671-63c9-ba42-f8a2d411cb1e@oracle.com> On Thu, Dec 15, 2016 at 12:27:49PM -0500, Boris Ostrovsky wrote: > It will probably fix it but I don't think we want this: it's a > build-time solution. Most kernels have XEN on even though they are > booted bare-metal. Lemme tell you want I want: a way to detect I'm running on xen. Does CPUID(4) work really early, at load_ucode_bsp() time? IOW, can I use some of the functionality hypervisor_cpuid_base() uses to detect xen and stop loading any further? > I meant, for example: > > proc_fam = find_cpu_family_by_equiv_cpu(proc_id); > if (!proc_fam) { > pr_err("No patch family for equiv ID: 0x%04x\n", proc_id); > return crnt_size; > } > > -boris > > > It returns > > crnt_size which can be a positive number so that we can advance to the > > next patch in the blob. ^^^^^^^^^^^^^^^ Read what I wrote here. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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From: Borislav Petkov <bp@suse.de> To: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com>, xen-devel <xen-devel@lists.xenproject.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org> Subject: Re: Can't boot as Xen dom0 due to commit fe055896 Date: Thu, 15 Dec 2016 18:36:09 +0100 [thread overview] Message-ID: <20161215173609.ornfok6lk5oro2pj@pd.tnic> (raw) In-Reply-To: <d92fb691-6671-63c9-ba42-f8a2d411cb1e@oracle.com> On Thu, Dec 15, 2016 at 12:27:49PM -0500, Boris Ostrovsky wrote: > It will probably fix it but I don't think we want this: it's a > build-time solution. Most kernels have XEN on even though they are > booted bare-metal. Lemme tell you want I want: a way to detect I'm running on xen. Does CPUID(4) work really early, at load_ucode_bsp() time? IOW, can I use some of the functionality hypervisor_cpuid_base() uses to detect xen and stop loading any further? > I meant, for example: > > proc_fam = find_cpu_family_by_equiv_cpu(proc_id); > if (!proc_fam) { > pr_err("No patch family for equiv ID: 0x%04x\n", proc_id); > return crnt_size; > } > > -boris > > > It returns > > crnt_size which can be a positive number so that we can advance to the > > next patch in the blob. ^^^^^^^^^^^^^^^ Read what I wrote here. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) -- _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-12-15 17:37 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-12-15 16:12 Can't boot as Xen dom0 due to commit fe055896 Juergen Gross 2016-12-15 16:46 ` Borislav Petkov 2016-12-15 16:46 ` Borislav Petkov 2016-12-15 16:53 ` [Xen-devel] " Jan Beulich 2016-12-15 16:53 ` Jan Beulich 2016-12-15 16:59 ` Andrew Cooper 2016-12-15 16:59 ` [Xen-devel] " Andrew Cooper 2016-12-15 17:14 ` Borislav Petkov 2016-12-15 17:14 ` Borislav Petkov 2016-12-15 17:00 ` Boris Ostrovsky 2016-12-15 17:17 ` Borislav Petkov 2016-12-15 17:17 ` Borislav Petkov 2016-12-15 17:27 ` Boris Ostrovsky 2016-12-15 17:27 ` Boris Ostrovsky 2016-12-15 17:36 ` Borislav Petkov [this message] 2016-12-15 17:36 ` Borislav Petkov 2016-12-15 19:08 ` Boris Ostrovsky 2016-12-15 19:08 ` Boris Ostrovsky 2016-12-15 19:23 ` Borislav Petkov 2016-12-15 19:23 ` Borislav Petkov 2016-12-15 19:36 ` Boris Ostrovsky 2016-12-15 19:36 ` Boris Ostrovsky 2016-12-15 20:03 ` Borislav Petkov 2016-12-15 22:56 ` Boris Ostrovsky 2016-12-15 22:56 ` Boris Ostrovsky 2016-12-15 23:04 ` Borislav Petkov 2016-12-16 3:56 ` Boris Ostrovsky 2016-12-16 3:56 ` Boris Ostrovsky 2016-12-16 9:01 ` Borislav Petkov 2016-12-16 9:01 ` Borislav Petkov 2016-12-16 9:14 ` [Xen-devel] " Andrew Cooper 2016-12-16 9:14 ` Andrew Cooper 2016-12-16 4:14 ` Henrique de Moraes Holschuh 2016-12-16 4:14 ` Henrique de Moraes Holschuh 2016-12-15 23:04 ` Borislav Petkov 2016-12-15 20:03 ` Borislav Petkov 2016-12-16 7:28 ` Juergen Gross 2016-12-16 7:28 ` Juergen Gross 2016-12-16 9:02 ` Borislav Petkov 2016-12-16 9:02 ` Borislav Petkov 2016-12-16 9:20 ` Juergen Gross 2016-12-16 9:20 ` Juergen Gross 2016-12-16 9:43 ` Borislav Petkov 2016-12-16 9:43 ` Borislav Petkov 2016-12-16 10:00 ` Juergen Gross 2016-12-16 10:45 ` Borislav Petkov 2016-12-16 10:45 ` Borislav Petkov 2016-12-16 12:15 ` Juergen Gross 2016-12-16 12:15 ` Juergen Gross 2016-12-16 12:19 ` Borislav Petkov 2016-12-16 12:19 ` Borislav Petkov 2016-12-16 13:07 ` Borislav Petkov 2016-12-16 13:07 ` Borislav Petkov 2016-12-16 14:40 ` Boris Ostrovsky 2016-12-16 14:40 ` Boris Ostrovsky 2016-12-16 15:17 ` Borislav Petkov 2016-12-16 15:17 ` Borislav Petkov 2016-12-16 10:00 ` Juergen Gross 2016-12-15 17:00 ` Boris Ostrovsky 2016-12-15 17:06 ` Juergen Gross 2016-12-15 17:06 ` Juergen Gross -- strict thread matches above, loose matches on Subject: below -- 2016-12-15 16:12 Juergen Gross
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