diff options
| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2015-08-10 23:34:36 +0300 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-20 14:25:25 +0300 |
| commit | 6b08cd6328c58a2ae190c5ee03a2ffcab5ef828e (patch) | |
| tree | 90fd9fee020e844c50f2b0c9bd40b8ccffdfe14b /arch/x86/xen/enlighten.c | |
| parent | e27b72df01109c689062caeba1defa013b759e0e (diff) | |
| download | linux-6b08cd6328c58a2ae190c5ee03a2ffcab5ef828e.tar.xz | |
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/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 19072f91a8e2..fdaba49f6759 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1031,6 +1031,9 @@ static u64 xen_read_msr_safe(unsigned int msr, int *err) { u64 val; + if (pmu_msr_read(msr, &val, err)) + return val; + val = native_read_msr_safe(msr, err); switch (msr) { case MSR_IA32_APICBASE: @@ -1077,17 +1080,13 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high) Xen console noise. */ default: - ret = native_write_msr_safe(msr, low, high); + if (!pmu_msr_write(msr, low, high, &ret)) + ret = native_write_msr_safe(msr, low, high); } return ret; } -unsigned long long xen_read_pmc(int counter) -{ - return 0; -} - void xen_setup_shared_info(void) { if (!xen_feature(XENFEAT_auto_translated_physmap)) { |