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authorSuraj Jitindar Singh <sjitindarsingh@gmail.com>2016-08-02 14:03:22 +1000
committerPaul Mackerras <paulus@ozlabs.org>2016-09-08 12:25:37 +1000
commit8a7e75d47b68193339f8727cf4503271d0a0b1d0 (patch)
tree717532f8b316f3169257a308c3652628799184bc /arch/arm/include
parent0cda69dd7cd64fdd54bdf584b5d6ba53767ba422 (diff)
KVM: Add provisioning for ulong vm stats and u64 vcpu stats
vms and vcpus have statistics associated with them which can be viewed within the debugfs. Currently it is assumed within the vcpu_stat_get() and vm_stat_get() functions that all of these statistics are represented as u32s, however the next patch adds some u64 vcpu statistics. Change all vcpu statistics to u64 and modify vcpu_stat_get() accordingly. Since vcpu statistics are per vcpu, they will only be updated by a single vcpu at a time so this shouldn't present a problem on 32-bit machines which can't atomically increment 64-bit numbers. However vm statistics could potentially be updated by multiple vcpus from that vm at a time. To avoid the overhead of atomics make all vm statistics ulong such that they are 64-bit on 64-bit systems where they can be atomically incremented and are 32-bit on 32-bit systems which may not be able to atomically increment 64-bit numbers. Modify vm_stat_get() to expect ulongs. Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: David Matlack <dmatlack@google.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/kvm_host.h12
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index de338d93d11b..6ad21f04a922 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -183,15 +183,15 @@ struct kvm_vcpu_arch {
};
struct kvm_vm_stat {
- u32 remote_tlb_flush;
+ ulong remote_tlb_flush;
};
struct kvm_vcpu_stat {
- u32 halt_successful_poll;
- u32 halt_attempted_poll;
- u32 halt_poll_invalid;
- u32 halt_wakeup;
- u32 hvc_exit_stat;
+ u64 halt_successful_poll;
+ u64 halt_attempted_poll;
+ u64 halt_poll_invalid;
+ u64 halt_wakeup;
+ u64 hvc_exit_stat;
u64 wfe_exit_stat;
u64 wfi_exit_stat;
u64 mmio_exit_user;