[Xen-changelog] [xen stable-4.8] x86/VPMU: clear the overflow status of which counter happened to overflow

[patchbot@xxxxxxx]

commit b76a79657cc00ee53db836bab241ebead7bbde55
Author:     Luwei Kang <luwei.kang@xxxxxxxxx>
AuthorDate: Wed Jan 18 09:46:54 2017 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jan 18 09:46:54 2017 +0100

    x86/VPMU: clear the overflow status of which counter happened to overflow
    
    Just set the corresponding bits of counters which happened to overflow,
    rather than setting all the available bits of IA32_PERF_GLOBAL_OVF_CTRL
    when pmu interrupt happened.
    
    Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>
    Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: 7a0c70482580234868fcc53b8d72e31966dc7c52
    master date: 2016-12-13 14:21:26 +0100
---
 xen/arch/x86/cpu/vpmu_intel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/cpu/vpmu_intel.c b/xen/arch/x86/cpu/vpmu_intel.c
index e8049ed..613aafe 100644
--- a/xen/arch/x86/cpu/vpmu_intel.c
+++ b/xen/arch/x86/cpu/vpmu_intel.c
@@ -868,7 +868,7 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs 
*regs)
         if ( is_pmc_quirk )
             handle_pmc_quirk(msr_content);
         core2_vpmu_cxt->global_status |= msr_content;
-        msr_content = ~global_ovf_ctrl_mask;
+        msr_content &= ~global_ovf_ctrl_mask;
         wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
     }
     else
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog