linux-kernel - [PATCH v2 9/9] xen/pvh: Use Xen's emergency

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Date:   Thu, 26 Jan 2017 14:41:32 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     JGross@...e.com
Cc:     roger.pau@...rix.com, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org, boris.ostrovsky@...cle.com
Subject: [PATCH v2 9/9] xen/pvh: Use Xen's emergency_restart op for PVH guests

Using native_machine_emergency_restart (called during reboot) will
lead PVH guests to machine_real_restart()  where we try to use
real_mode_header which is not initialized.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
---
New in v2

 arch/x86/xen/enlighten.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6463382..20ae5d9d 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1915,6 +1915,9 @@ static void __init xen_hvm_guest_init(void)
 	x86_init.irqs.intr_init = xen_init_IRQ;
 	xen_hvm_init_time_ops();
 	xen_hvm_init_mmu_ops();
+
+	if (xen_pvh_domain())
+		machine_ops.emergency_restart = xen_emergency_restart;
 #ifdef CONFIG_KEXEC_CORE
 	machine_ops.shutdown = xen_hvm_shutdown;
 	machine_ops.crash_shutdown = xen_hvm_crash_shutdown;
-- 
1.8.3.1