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    Subject[tip:x86/boot] x86/xen: Use X86_SUBARCH_XEN for PV guest boots
    Commit-ID:  ea1794812410e92c537c839bedeb2d2b2f87c80d
    Gitweb: http://git.kernel.org/tip/ea1794812410e92c537c839bedeb2d2b2f87c80d
    Author: Luis R. Rodriguez <mcgrof@kernel.org>
    AuthorDate: Wed, 13 Apr 2016 17:04:32 -0700
    Committer: Ingo Molnar <mingo@kernel.org>
    CommitDate: Fri, 22 Apr 2016 10:28:59 +0200

    x86/xen: Use X86_SUBARCH_XEN for PV guest boots

    The use of subarch should have no current effect on Xen
    PV guests, as such this should have no current functional
    effects.

    Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
    Reviewed-by: David Vrabel <david.vrabel@citrix.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: andrew.cooper3@citrix.com
    Cc: andriy.shevchenko@linux.intel.com
    Cc: bigeasy@linutronix.de
    Cc: boris.ostrovsky@oracle.com
    Cc: ffainelli@freebox.fr
    Cc: george.dunlap@citrix.com
    Cc: glin@suse.com
    Cc: jgross@suse.com
    Cc: jlee@suse.com
    Cc: josh@joshtriplett.org
    Cc: julien.grall@linaro.org
    Cc: konrad.wilk@oracle.com
    Cc: kozerkov@parallels.com
    Cc: lenb@kernel.org
    Cc: lguest@lists.ozlabs.org
    Cc: linux-acpi@vger.kernel.org
    Cc: lv.zheng@intel.com
    Cc: matt@codeblueprint.co.uk
    Cc: mbizon@freebox.fr
    Cc: rjw@rjwysocki.net
    Cc: robert.moore@intel.com
    Cc: rusty@rustcorp.com.au
    Cc: tiwai@suse.de
    Cc: toshi.kani@hp.com
    Cc: xen-devel@lists.xensource.com
    Link: http://lkml.kernel.org/r/1460592286-300-3-git-send-email-mcgrof@kernel.org
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    ---
    arch/x86/xen/enlighten.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
    index 880862c..61f4d9f 100644
    --- a/arch/x86/xen/enlighten.c
    +++ b/arch/x86/xen/enlighten.c
    @@ -1670,6 +1670,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
    boot_params.hdr.ramdisk_image = initrd_start;
    boot_params.hdr.ramdisk_size = xen_start_info->mod_len;
    boot_params.hdr.cmd_line_ptr = __pa(xen_start_info->cmd_line);
    + boot_params.hdr.hardware_subarch = X86_SUBARCH_XEN;

    if (!xen_initial_domain()) {
    add_preferred_console("xenboot", 0, NULL);
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