linux: Release 4.13.4-openpower2

Add two patches for P9:

  powerpc/mce: Move 64-bit machine check code into mce.c
  powerpc/64s: Add workaround for P9 vector CI load issue

The first patch is a prerequsite for the second. The second patch is in
the powerpc-next branch for 4.15.

Signed-off-by: Joel Stanley <joel@jms.id.au>

openpower/linux/0001-xhci-Use-xhci_pci_remove-for-xhci-device-shutdown.patch

@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Thadeu Lima De Souza Cascardo <thadeul@br.ibm.com>
 Date: Tue, 25 Mar 2014 10:45:16 -0400
-Subject: [PATCH 1/2] xhci: Use xhci_pci_remove for xhci device shutdown
+Subject: [PATCH 1/4] xhci: Use xhci_pci_remove for xhci device shutdown
 
 Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
 Signed-off-by: Joel Stanley <joel@jms.id.au>

openpower/linux/0002-powerpc-mce-Move-64-bit-machine-check-code-into-mce..patch

@@ -0,0 +1,114 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Michael Ellerman <mpe@ellerman.id.au>
+Date: Wed, 4 Oct 2017 13:42:51 +1100
+Subject: [PATCH 2/4] powerpc/mce: Move 64-bit machine check code into mce.c
+
+We already have mce.c which is built for 64bit and contains other parts
+of the machine check code, so move these bits in there too.
+
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+(cherry picked from commit ccd3cd361341b71ae2afa596f6b470fcb32a916e)
+Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
+Signed-off-by: Joel Stanley <joel@jms.id.au>
+---
+ arch/powerpc/kernel/mce.c   | 33 +++++++++++++++++++++++++++++++++
+ arch/powerpc/kernel/traps.c | 33 ---------------------------------
+ 2 files changed, 33 insertions(+), 33 deletions(-)
+
+diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
+index e0e131e662ed..9b2ea7e71c06 100644
+--- a/arch/powerpc/kernel/mce.c
++++ b/arch/powerpc/kernel/mce.c
+@@ -22,11 +22,14 @@
+ #undef DEBUG
+ #define pr_fmt(fmt) "mce: " fmt
+
++#include <linux/hardirq.h>
+ #include <linux/types.h>
+ #include <linux/ptrace.h>
+ #include <linux/percpu.h>
+ #include <linux/export.h>
+ #include <linux/irq_work.h>
++
++#include <asm/machdep.h>
+ #include <asm/mce.h>
+
+ static DEFINE_PER_CPU(int, mce_nest_count);
+@@ -446,3 +449,33 @@ uint64_t get_mce_fault_addr(struct machine_check_event *evt)
+ 	return 0;
+ }
+ EXPORT_SYMBOL(get_mce_fault_addr);
++
++/*
++ * This function is called in real mode. Strictly no printk's please.
++ *
++ * regs->nip and regs->msr contains srr0 and ssr1.
++ */
++long machine_check_early(struct pt_regs *regs)
++{
++	long handled = 0;
++
++	__this_cpu_inc(irq_stat.mce_exceptions);
++
++	if (cur_cpu_spec && cur_cpu_spec->machine_check_early)
++		handled = cur_cpu_spec->machine_check_early(regs);
++	return handled;
++}
++
++long hmi_exception_realmode(struct pt_regs *regs)
++{
++	__this_cpu_inc(irq_stat.hmi_exceptions);
++
++	wait_for_subcore_guest_exit();
++
++	if (ppc_md.hmi_exception_early)
++		ppc_md.hmi_exception_early(regs);
++
++	wait_for_tb_resync();
++
++	return 0;
++}
+diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
+index bfcfd9ef09f2..559664e75fb5 100644
+--- a/arch/powerpc/kernel/traps.c
++++ b/arch/powerpc/kernel/traps.c
+@@ -312,39 +312,6 @@ void system_reset_exception(struct pt_regs *regs)
+ 	/* What should we do here? We could issue a shutdown or hard reset. */
+ }
+
+-#ifdef CONFIG_PPC64
+-/*
+- * This function is called in real mode. Strictly no printk's please.
+- *
+- * regs->nip and regs->msr contains srr0 and ssr1.
+- */
+-long machine_check_early(struct pt_regs *regs)
+-{
+-	long handled = 0;
+-
+-	__this_cpu_inc(irq_stat.mce_exceptions);
+-
+-	if (cur_cpu_spec && cur_cpu_spec->machine_check_early)
+-		handled = cur_cpu_spec->machine_check_early(regs);
+-	return handled;
+-}
+-
+-long hmi_exception_realmode(struct pt_regs *regs)
+-{
+-	__this_cpu_inc(irq_stat.hmi_exceptions);
+-
+-	wait_for_subcore_guest_exit();
+-
+-	if (ppc_md.hmi_exception_early)
+-		ppc_md.hmi_exception_early(regs);
+-
+-	wait_for_tb_resync();
+-
+-	return 0;
+-}
+-
+-#endif
+-
+ /*
+  * I/O accesses can cause machine checks on powermacs.
+  * Check if the NIP corresponds to the address of a sync