linux-kernel - [PATCH v3 02/21] x86/xen: globalize have_vcpu_info

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Message-Id: <20170314173556.2249-3-vkuznets@redhat.com>
Date:   Tue, 14 Mar 2017 18:35:37 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     xen-devel@...ts.xenproject.org
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Andrew Jones <drjones@...hat.com>
Subject: [PATCH v3 02/21] x86/xen: globalize have_vcpu_info_placement

have_vcpu_info_placement applies to both PV and HVM and as we're going
to split the code we need to make it global.

Rename to xen_have_vcpu_info_placement.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Reviewed-by: Juergen Gross <jgross@...e.com>
---
 arch/x86/xen/enlighten.c | 12 ++++++------
 arch/x86/xen/xen-ops.h   |  2 ++
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 999ba13..f0784a6 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -164,7 +164,7 @@ struct shared_info *HYPERVISOR_shared_info = &xen_dummy_shared_info;
  *
  * 0: not available, 1: available
  */
-static int have_vcpu_info_placement = 1;
+int xen_have_vcpu_info_placement = 1;
 
 struct tls_descs {
 	struct desc_struct desc[3];
@@ -228,7 +228,7 @@ void xen_vcpu_setup(int cpu)
 		per_cpu(xen_vcpu, cpu) =
 			&HYPERVISOR_shared_info->vcpu_info[xen_vcpu_nr(cpu)];
 
-	if (!have_vcpu_info_placement) {
+	if (!xen_have_vcpu_info_placement) {
 		if (cpu >= MAX_VIRT_CPUS)
 			clamp_max_cpus();
 		return;
@@ -251,7 +251,7 @@ void xen_vcpu_setup(int cpu)
 
 	if (err) {
 		printk(KERN_DEBUG "register_vcpu_info failed: err=%d\n", err);
-		have_vcpu_info_placement = 0;
+		xen_have_vcpu_info_placement = 0;
 		clamp_max_cpus();
 	} else {
 		/* This cpu is using the registered vcpu info, even if
@@ -280,7 +280,7 @@ void xen_vcpu_restore(void)
 
 		xen_setup_runstate_info(cpu);
 
-		if (have_vcpu_info_placement)
+		if (xen_have_vcpu_info_placement)
 			xen_vcpu_setup(cpu);
 
 		if (other_cpu && is_up &&
@@ -1159,7 +1159,7 @@ void xen_setup_vcpu_info_placement(void)
 	 * xen_vcpu_setup managed to place the vcpu_info within the
 	 * percpu area for all cpus, so make use of it.
 	 */
-	if (have_vcpu_info_placement) {
+	if (xen_have_vcpu_info_placement) {
 		pv_irq_ops.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
 		pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
 		pv_irq_ops.irq_disable = __PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
@@ -1178,7 +1178,7 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
 
 #define SITE(op, x)							\
 	case PARAVIRT_PATCH(op.x):					\
-	if (have_vcpu_info_placement) {					\
+	if (xen_have_vcpu_info_placement) {				\
 		start = (char *)xen_##x##_direct;			\
 		end = xen_##x##_direct_end;				\
 		reloc = xen_##x##_direct_reloc;				\
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index f6a41c4..2b162f6 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -76,6 +76,8 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
 
 bool xen_vcpu_stolen(int vcpu);
 
+extern int xen_have_vcpu_info_placement;
+
 void xen_vcpu_setup(int cpu);
 void xen_setup_vcpu_info_placement(void);
 
-- 
2.9.3