linux-kernel - [PATCH v5 3/7] xen/pvh: Create a new file for Xen specific PVH code

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Message-Id: <1521573586-17463-1-git-send-email-maran.wilson@oracle.com>
Date:   Tue, 20 Mar 2018 12:19:44 -0700
From:   Maran Wilson <maran.wilson@...cle.com>
To:     x86@...nel.org, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com, jgross@...e.com
Cc:     boris.ostrovsky@...cle.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, roger.pau@...rix.com, rkrcmar@...hat.com,
        maran.wilson@...cle.com
Subject: [PATCH v5 3/7] xen/pvh: Create a new file for Xen specific PVH code

We need to refactor PVH entry code so that support for other hypervisors
like Qemu/KVM can be added more easily.

The first step in that direction is to create a new file that will
eventually hold the Xen specific routines.

Signed-off-by: Maran Wilson <maran.wilson@...cle.com>
---
 arch/x86/platform/pvh/enlighten.c |  5 ++---
 arch/x86/xen/Makefile             |  1 +
 arch/x86/xen/enlighten_pvh.c      | 10 ++++++++++
 3 files changed, 13 insertions(+), 3 deletions(-)
 create mode 100644 arch/x86/xen/enlighten_pvh.c

diff --git a/arch/x86/platform/pvh/enlighten.c b/arch/x86/platform/pvh/enlighten.c
index 436c4f003e17..74c0a711ebe7 100644
--- a/arch/x86/platform/pvh/enlighten.c
+++ b/arch/x86/platform/pvh/enlighten.c
@@ -16,10 +16,9 @@
 /*
  * PVH variables.
  *
- * xen_pvh and pvh_bootparams need to live in data segment since they
- * are used after startup_{32|64}, which clear .bss, are invoked.
+ * pvh_bootparams needs to live in the data segment since it is
+ * used after startup_{32|64}, which clear .bss, are invoked.
  */
-bool xen_pvh __attribute__((section(".data"))) = 0;
 struct boot_params pvh_bootparams __attribute__((section(".data")));
 
 struct hvm_start_info pvh_start_info;
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index f1b850607212..ae5c6f1f0fe0 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -20,6 +20,7 @@ obj-y		:= enlighten.o multicalls.o mmu.o irq.o \
 obj-$(CONFIG_XEN_PVHVM)		+= enlighten_hvm.o mmu_hvm.o suspend_hvm.o
 obj-$(CONFIG_XEN_PV)			+= setup.o apic.o pmu.o suspend_pv.o \
 						p2m.o enlighten_pv.o mmu_pv.o
+obj-$(CONFIG_XEN_PVH)			+= enlighten_pvh.o
 
 obj-$(CONFIG_EVENT_TRACING) += trace.o
 
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
new file mode 100644
index 000000000000..c5409c1f259f
--- /dev/null
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -0,0 +1,10 @@
+#include <linux/types.h>
+
+/*
+ * PVH variables.
+ *
+ * The variable xen_pvh needs to live in the data segment since it is used
+ * after startup_{32|64} is invoked, which will clear the .bss segment.
+ */
+bool xen_pvh __attribute__((section(".data"))) = 0;
+
-- 
2.16.1