[tip:x86/boot] x86/xen: Use X86_SUBARCH_XEN for PV guest boots

[tip-bot for Luis R. Rodriguez]

Commit-ID:  ea1794812410e92c537c839bedeb2d2b2f87c80d
Gitweb:     http://git.kernel.org/tip/ea1794812410e92c537c839bedeb2d2b2f87c80d
Author:     Luis R. Rodriguez <mcgrof@xxxxxxxxxx>
AuthorDate: Wed, 13 Apr 2016 17:04:32 -0700
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
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@xxxxxxxxxx>
Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: andrew.cooper3@xxxxxxxxxx
Cc: andriy.shevchenko@xxxxxxxxxxxxxxx
Cc: bigeasy@xxxxxxxxxxxxx
Cc: boris.ostrovsky@xxxxxxxxxx
Cc: ffainelli@xxxxxxxxxx
Cc: george.dunlap@xxxxxxxxxx
Cc: glin@xxxxxxxx
Cc: jgross@xxxxxxxx
Cc: jlee@xxxxxxxx
Cc: josh@xxxxxxxxxxxxxxxx
Cc: julien.grall@xxxxxxxxxx
Cc: konrad.wilk@xxxxxxxxxx
Cc: kozerkov@xxxxxxxxxxxxx
Cc: lenb@xxxxxxxxxx
Cc: lguest@xxxxxxxxxxxxxxxx
Cc: linux-acpi@xxxxxxxxxxxxxxx
Cc: lv.zheng@xxxxxxxxx
Cc: matt@xxxxxxxxxxxxxxxxxxx
Cc: mbizon@xxxxxxxxxx
Cc: rjw@xxxxxxxxxxxxx
Cc: robert.moore@xxxxxxxxx
Cc: rusty@xxxxxxxxxxxxxxx
Cc: tiwai@xxxxxxx
Cc: toshi.kani@xxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1460592286-300-3-git-send-email-mcgrof@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 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);