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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2015-08-10 16:34:36 -0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-20 12:25:25 +0100 |
| commit | 6b08cd6328c58a2ae190c5ee03a2ffcab5ef828e (patch) | |
| tree | 90fd9fee020e844c50f2b0c9bd40b8ccffdfe14b /arch/x86/xen/apic.c | |
| parent | e27b72df01109c689062caeba1defa013b759e0e (diff) | |
| download | linux-6b08cd6328c58a2ae190c5ee03a2ffcab5ef828e.tar.bz2 | |
xen/PMU: Intercept PMU-related MSR and APIC accesses
Provide interfaces for recognizing accesses to PMU-related MSRs and
LVTPC APIC and process these accesses in Xen PMU code.
(The interrupt handler performs XENPMU_flush right away in the beginning
since no PMU emulation is available. It will be added with a later patch).
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/apic.c')
| -rw-r--r-- | arch/x86/xen/apic.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c index d03ebfa89b9f..acda713ab5be 100644 --- a/arch/x86/xen/apic.c +++ b/arch/x86/xen/apic.c @@ -7,6 +7,7 @@ #include <xen/xen.h> #include <xen/interface/physdev.h> #include "xen-ops.h" +#include "pmu.h" #include "smp.h" static unsigned int xen_io_apic_read(unsigned apic, unsigned reg) @@ -72,8 +73,10 @@ static u32 xen_apic_read(u32 reg) static void xen_apic_write(u32 reg, u32 val) { - if (reg == APIC_LVTPC) + if (reg == APIC_LVTPC) { + (void)pmu_apic_update(reg); return; + } /* Warn to see if there's any stray references */ WARN(1,"register: %x, value: %x\n", reg, val); |