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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2015-08-10 16:34:34 -0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-20 12:25:20 +0100 |
| commit | 65d0cf0be79feebeb19e7626fd3ed41ae73f642d (patch) | |
| tree | d8ade5462b3332084ca9fef267638d30a0795fd7 /include/xen/interface/xen.h | |
| parent | 5f141548824cebbff2e838ff401c34e667797467 (diff) | |
| download | lwn-65d0cf0be79feebeb19e7626fd3ed41ae73f642d.tar.gz lwn-65d0cf0be79feebeb19e7626fd3ed41ae73f642d.zip | |
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 'include/xen/interface/xen.h')
| -rw-r--r-- | include/xen/interface/xen.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index e9d4501d1f5e..167071c290b3 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h @@ -113,6 +113,7 @@ #define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured */ #define VIRQ_XC_RESERVED 11 /* G. Reserved for XenClient */ #define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory */ +#define VIRQ_XENPMU 13 /* PMC interrupt */ /* Architecture-specific VIRQ definitions. */ #define VIRQ_ARCH_0 16 |