summaryrefslogtreecommitdiffstats
path: root/arch/x86/xen/suspend.c
diff options
context:
space:
mode:
authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2015-08-10 16:34:34 -0400
committerDavid Vrabel <david.vrabel@citrix.com>2015-08-20 12:25:20 +0100
commit65d0cf0be79feebeb19e7626fd3ed41ae73f642d (patch)
treed8ade5462b3332084ca9fef267638d30a0795fd7 /arch/x86/xen/suspend.c
parent5f141548824cebbff2e838ff401c34e667797467 (diff)
downloadlinux-65d0cf0be79feebeb19e7626fd3ed41ae73f642d.tar.bz2
xen/PMU: Initialization code for Xen PMU
Map shared data structure that will hold CPU registers, VPMU context, V/PCPU IDs of the CPU interrupted by PMU interrupt. Hypervisor fills this information in its handler and passes it to the guest for further processing. Set up PMU VIRQ. Now that perf infrastructure will assume that PMU is available on a PV guest we need to be careful and make sure that accesses via RDPMC instruction don't cause fatal traps by the hypervisor. Provide a nop RDPMC handler. For the same reason avoid issuing a warning on a write to APIC's LVTPC. Both of these will be made functional in later patches. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86/xen/suspend.c')
-rw-r--r--arch/x86/xen/suspend.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c
index 53b4c0811f4f..feddabdab448 100644
--- a/arch/x86/xen/suspend.c
+++ b/arch/x86/xen/suspend.c
@@ -11,6 +11,7 @@
#include "xen-ops.h"
#include "mmu.h"
+#include "pmu.h"
static void xen_pv_pre_suspend(void)
{
@@ -67,16 +68,26 @@ static void xen_pv_post_suspend(int suspend_cancelled)
void xen_arch_pre_suspend(void)
{
- if (xen_pv_domain())
- xen_pv_pre_suspend();
+ int cpu;
+
+ for_each_online_cpu(cpu)
+ xen_pmu_finish(cpu);
+
+ if (xen_pv_domain())
+ xen_pv_pre_suspend();
}
void xen_arch_post_suspend(int cancelled)
{
- if (xen_pv_domain())
- xen_pv_post_suspend(cancelled);
- else
- xen_hvm_post_suspend(cancelled);
+ int cpu;
+
+ if (xen_pv_domain())
+ xen_pv_post_suspend(cancelled);
+ else
+ xen_hvm_post_suspend(cancelled);
+
+ for_each_online_cpu(cpu)
+ xen_pmu_init(cpu);
}
static void xen_vcpu_notify_restore(void *data)