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authorVitaly Kuznetsov <vkuznets@redhat.com>2016-06-30 18:56:38 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2016-07-25 15:32:34 +0300
commitad5475f9faf5186b7f59de2c6481ee3e211f1ed7 (patch)
treedc9c373319bc1f1927ce10d8937292c17af217ed /arch
parent88e957d6e47f1232ad15b21e54a44f1147ea8c1b (diff)
downloadlinux-ad5475f9faf5186b7f59de2c6481ee3e211f1ed7.tar.xz
x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
HYPERVISOR_vcpu_op() passes Linux's idea of vCPU id as a parameter while Xen's idea is expected. In some cases these ideas diverge so we need to do remapping. Convert all callers of HYPERVISOR_vcpu_op() to use xen_vcpu_nr(). Leave xen_fill_possible_map() and xen_filter_cpu_maps() intact as they're only being called by PV guests before perpu areas are initialized. While the issue could be solved by switching to early_percpu for xen_vcpu_id I think it's not worth it: PV guests will probably never get to the point where their idea of vCPU id diverges from Xen's. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/xen/enlighten.c3
-rw-r--r--arch/x86/xen/enlighten.c10
-rw-r--r--arch/x86/xen/irq.c3
-rw-r--r--arch/x86/xen/smp.c11
-rw-r--r--arch/x86/xen/time.c18
5 files changed, 28 insertions, 17 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 72cf06bf43f2..0bea3d271f6e 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -177,7 +177,8 @@ static void xen_percpu_init(void)
info.mfn = virt_to_gfn(vcpup);
info.offset = xen_offset_in_page(vcpup);
- err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
+ err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, xen_vcpu_nr(cpu),
+ &info);
BUG_ON(err);
per_cpu(xen_vcpu, cpu) = vcpup;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index d093949c94e0..46f3399aee2c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -228,7 +228,8 @@ static void xen_vcpu_setup(int cpu)
hypervisor has no unregister variant and this hypercall does not
allow to over-write info.mfn and info.offset.
*/
- err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
+ err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, xen_vcpu_nr(cpu),
+ &info);
if (err) {
printk(KERN_DEBUG "register_vcpu_info failed: err=%d\n", err);
@@ -252,10 +253,11 @@ void xen_vcpu_restore(void)
for_each_possible_cpu(cpu) {
bool other_cpu = (cpu != smp_processor_id());
- bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL);
+ bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, xen_vcpu_nr(cpu),
+ NULL);
if (other_cpu && is_up &&
- HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
+ HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL))
BUG();
xen_setup_runstate_info(cpu);
@@ -264,7 +266,7 @@ void xen_vcpu_restore(void)
xen_vcpu_setup(cpu);
if (other_cpu && is_up &&
- HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
+ HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL))
BUG();
}
}
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index a1207cb6472a..33e92955e09d 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -109,7 +109,8 @@ static void xen_safe_halt(void)
static void xen_halt(void)
{
if (irqs_disabled())
- HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ HYPERVISOR_vcpu_op(VCPUOP_down,
+ xen_vcpu_nr(smp_processor_id()), NULL);
else
xen_safe_halt();
}
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 719cf291dcdf..a3118f250416 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -454,7 +454,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
#endif
ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
- if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, ctxt))
+ if (HYPERVISOR_vcpu_op(VCPUOP_initialise, xen_vcpu_nr(cpu), ctxt))
BUG();
kfree(ctxt);
@@ -492,7 +492,7 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct *idle)
if (rc)
return rc;
- rc = HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL);
+ rc = HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL);
BUG_ON(rc);
while (cpu_report_state(cpu) != CPU_ONLINE)
@@ -520,7 +520,8 @@ static int xen_cpu_disable(void)
static void xen_cpu_die(unsigned int cpu)
{
- while (xen_pv_domain() && HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
+ while (xen_pv_domain() && HYPERVISOR_vcpu_op(VCPUOP_is_up,
+ xen_vcpu_nr(cpu), NULL)) {
__set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ/10);
}
@@ -536,7 +537,7 @@ static void xen_cpu_die(unsigned int cpu)
static void xen_play_dead(void) /* used only with HOTPLUG_CPU */
{
play_dead_common();
- HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
+ HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(smp_processor_id()), NULL);
cpu_bringup();
/*
* commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down)
@@ -576,7 +577,7 @@ static void stop_self(void *v)
set_cpu_online(cpu, false);
- HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL);
+ HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL);
BUG();
}
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index c31006f0f37f..fd7cd6f29b68 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -223,8 +223,10 @@ static int xen_vcpuop_shutdown(struct clock_event_device *evt)
{
int cpu = smp_processor_id();
- if (HYPERVISOR_vcpu_op(VCPUOP_stop_singleshot_timer, cpu, NULL) ||
- HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
+ if (HYPERVISOR_vcpu_op(VCPUOP_stop_singleshot_timer, xen_vcpu_nr(cpu),
+ NULL) ||
+ HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
+ NULL))
BUG();
return 0;
@@ -234,7 +236,8 @@ static int xen_vcpuop_set_oneshot(struct clock_event_device *evt)
{
int cpu = smp_processor_id();
- if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
+ if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
+ NULL))
BUG();
return 0;
@@ -253,7 +256,8 @@ static int xen_vcpuop_set_next_event(unsigned long delta,
/* Get an event anyway, even if the timeout is already expired */
single.flags = 0;
- ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &single);
+ ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, xen_vcpu_nr(cpu),
+ &single);
BUG_ON(ret != 0);
return ret;
@@ -352,7 +356,8 @@ void xen_timer_resume(void)
return;
for_each_online_cpu(cpu) {
- if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
+ if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer,
+ xen_vcpu_nr(cpu), NULL))
BUG();
}
}
@@ -372,7 +377,8 @@ static void __init xen_time_init(void)
clocksource_register_hz(&xen_clocksource, NSEC_PER_SEC);
- if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL) == 0) {
+ if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
+ NULL) == 0) {
/* Successfully turned off 100Hz tick, so we have the
vcpuop-based timer interface */
printk(KERN_DEBUG "Xen: using vcpuop timer interface\n");