[PATCH v3 10/21] x86/xen: split off smp_hvm.c
From: Vitaly Kuznetsov
Date: Tue Mar 14 2017 - 13:40:54 EST
Move PVHVM related code to smp_hvm.c. Drop 'static' qualifier from
xen_smp_send_reschedule(), xen_smp_send_call_function_ipi(),
xen_smp_send_call_function_single_ipi(), these functions will be moved to
common smp code when smp_pv.c is split.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
Changes since v2:
drop 'extern' qualifier newly added prototypes to smp.h [Juergen Gross]
---
arch/x86/xen/Kconfig | 4 ++++
arch/x86/xen/Makefile | 1 +
arch/x86/xen/smp.c | 57 +++----------------------------------------------
arch/x86/xen/smp.h | 3 +++
arch/x86/xen/smp_hvm.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 69 insertions(+), 54 deletions(-)
create mode 100644 arch/x86/xen/smp_hvm.c
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 5bb1434..6d15c34 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -37,6 +37,10 @@ config XEN_PVHVM
help
Support running as a Xen PVHVM guest.
+config XEN_PVHVM_SMP
+ def_bool y
+ depends on XEN_PVHVM && SMP
+
config XEN_512GB
bool "Limit Xen pv-domain memory to 512GB"
depends on XEN_PV && X86_64
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 5ca8d3eb..bc7df8c 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
obj-$(CONFIG_EVENT_TRACING) += trace.o
obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_XEN_PVHVM_SMP) += smp_hvm.o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
obj-$(CONFIG_XEN_DOM0) += vga.o
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 53bf0a4..5939592 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -328,25 +328,6 @@ static void __init xen_pv_smp_prepare_boot_cpu(void)
xen_init_spinlocks();
}
-static void __init xen_hvm_smp_prepare_boot_cpu(void)
-{
- BUG_ON(smp_processor_id() != 0);
- native_smp_prepare_boot_cpu();
-
- /*
- * Setup vcpu_info for boot CPU.
- */
- xen_vcpu_setup(0);
-
- /*
- * The alternative logic (which patches the unlock/lock) runs before
- * the smp bootup up code is activated. Hence we need to set this up
- * the core kernel is being patched. Otherwise we will have only
- * modules patched but not core code.
- */
- xen_init_spinlocks();
-}
-
static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
{
unsigned cpu;
@@ -530,15 +511,6 @@ static void xen_pv_cpu_die(unsigned int cpu)
}
}
-static void xen_hvm_cpu_die(unsigned int cpu)
-{
- if (common_cpu_die(cpu) == 0) {
- xen_smp_intr_free(cpu);
- xen_uninit_lock_cpu(cpu);
- xen_teardown_timer(cpu);
- }
-}
-
static void xen_play_dead(void) /* used only with HOTPLUG_CPU */
{
play_dead_common();
@@ -566,11 +538,6 @@ static void xen_pv_cpu_die(unsigned int cpu)
BUG();
}
-static void xen_hvm_cpu_die(unsigned int cpu)
-{
- BUG();
-}
-
static void xen_play_dead(void)
{
BUG();
@@ -596,7 +563,7 @@ static void xen_stop_other_cpus(int wait)
smp_call_function(stop_self, NULL, wait);
}
-static void xen_smp_send_reschedule(int cpu)
+void xen_smp_send_reschedule(int cpu)
{
xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);
}
@@ -610,7 +577,7 @@ static void __xen_send_IPI_mask(const struct cpumask *mask,
xen_send_IPI_one(cpu, vector);
}
-static void xen_smp_send_call_function_ipi(const struct cpumask *mask)
+void xen_smp_send_call_function_ipi(const struct cpumask *mask)
{
int cpu;
@@ -625,7 +592,7 @@ static void xen_smp_send_call_function_ipi(const struct cpumask *mask)
}
}
-static void xen_smp_send_call_function_single_ipi(int cpu)
+void xen_smp_send_call_function_single_ipi(int cpu)
{
__xen_send_IPI_mask(cpumask_of(cpu),
XEN_CALL_FUNCTION_SINGLE_VECTOR);
@@ -763,21 +730,3 @@ void __init xen_smp_init(void)
smp_ops = xen_smp_ops;
xen_fill_possible_map();
}
-
-static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
-{
- native_smp_prepare_cpus(max_cpus);
- WARN_ON(xen_smp_intr_init(0));
-
- xen_init_lock_cpu(0);
-}
-
-void __init xen_hvm_smp_init(void)
-{
- smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
- smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
- smp_ops.cpu_die = xen_hvm_cpu_die;
- smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
- smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi;
- smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
-}
diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index 33320ce..2e8cd56 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -14,6 +14,9 @@ extern void xen_smp_intr_free(unsigned int cpu);
int xen_smp_intr_init_pv(unsigned int cpu);
void xen_smp_intr_free_pv(unsigned int cpu);
+void xen_smp_send_reschedule(int cpu);
+void xen_smp_send_call_function_ipi(const struct cpumask *mask);
+void xen_smp_send_call_function_single_ipi(int cpu);
#else /* CONFIG_SMP */
static inline int xen_smp_intr_init(unsigned int cpu)
diff --git a/arch/x86/xen/smp_hvm.c b/arch/x86/xen/smp_hvm.c
new file mode 100644
index 0000000..8bed434
--- /dev/null
+++ b/arch/x86/xen/smp_hvm.c
@@ -0,0 +1,58 @@
+#include <asm/smp.h>
+
+#include "xen-ops.h"
+#include "smp.h"
+
+
+static void __init xen_hvm_smp_prepare_boot_cpu(void)
+{
+ BUG_ON(smp_processor_id() != 0);
+ native_smp_prepare_boot_cpu();
+
+ /*
+ * Setup vcpu_info for boot CPU.
+ */
+ xen_vcpu_setup(0);
+
+ /*
+ * The alternative logic (which patches the unlock/lock) runs before
+ * the smp bootup up code is activated. Hence we need to set this up
+ * the core kernel is being patched. Otherwise we will have only
+ * modules patched but not core code.
+ */
+ xen_init_spinlocks();
+}
+
+static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
+{
+ native_smp_prepare_cpus(max_cpus);
+ WARN_ON(xen_smp_intr_init(0));
+
+ xen_init_lock_cpu(0);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void xen_hvm_cpu_die(unsigned int cpu)
+{
+ if (common_cpu_die(cpu) == 0) {
+ xen_smp_intr_free(cpu);
+ xen_uninit_lock_cpu(cpu);
+ xen_teardown_timer(cpu);
+ }
+}
+#else
+static void xen_hvm_cpu_die(unsigned int cpu)
+{
+ BUG();
+}
+#endif
+
+void __init xen_hvm_smp_init(void)
+{
+ smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
+ smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
+ smp_ops.cpu_die = xen_hvm_cpu_die;
+ smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
+ smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi;
+ smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
+}
--
2.9.3