diff options
| author | Mukesh Rathor <mukesh.rathor@oracle.com> | 2013-12-11 21:36:51 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 16:44:15 +0100 |
| commit | 2771374d47220c7ec271281437625e9519505bb2 (patch) | |
| tree | 2f49ac39521a4aa45872ecd0568565bd625d59b1 /drivers/xen | |
| parent | xen/pvh: Update E820 to work with PVH (v2) (diff) | |
| download | linux-2771374d47220c7ec271281437625e9519505bb2.tar.xz linux-2771374d47220c7ec271281437625e9519505bb2.zip | |
xen/pvh: Piggyback on PVHVM for event channels (v2)
PVH is a PV guest with a twist - there are certain things
that work in it like HVM and some like PV. There is
a similar mode - PVHVM where we run in HVM mode with
PV code enabled - and this patch explores that.
The most notable PV interfaces are the XenBus and event channels.
We will piggyback on how the event channel mechanism is
used in PVHVM - that is we want the normal native IRQ mechanism
and we will install a vector (hvm callback) for which we
will call the event channel mechanism.
This means that from a pvops perspective, we can use
native_irq_ops instead of the Xen PV specific. Albeit in the
future we could support pirq_eoi_map. But that is
a feature request that can be shared with PVHVM.
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/events/events_base.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 1d16185e82b2..4672e003c0ad 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1685,8 +1685,15 @@ void __init xen_init_IRQ(void) pirq_needs_eoi = pirq_needs_eoi_flag; #ifdef CONFIG_X86 - if (xen_hvm_domain()) { + if (xen_pv_domain()) { + irq_ctx_init(smp_processor_id()); + if (xen_initial_domain()) + pci_xen_initial_domain(); + } + if (xen_feature(XENFEAT_hvm_callback_vector)) xen_callback_vector(); + + if (xen_hvm_domain()) { native_init_IRQ(); /* pci_xen_hvm_init must be called after native_init_IRQ so that * __acpi_register_gsi can point at the right function */ @@ -1695,13 +1702,10 @@ void __init xen_init_IRQ(void) int rc; struct physdev_pirq_eoi_gmfn eoi_gmfn; - irq_ctx_init(smp_processor_id()); - if (xen_initial_domain()) - pci_xen_initial_domain(); - pirq_eoi_map = (void *)__get_free_page(GFP_KERNEL|__GFP_ZERO); eoi_gmfn.gmfn = virt_to_mfn(pirq_eoi_map); rc = HYPERVISOR_physdev_op(PHYSDEVOP_pirq_eoi_gmfn_v2, &eoi_gmfn); + /* TODO: No PVH support for PIRQ EOI */ if (rc != 0) { free_page((unsigned long) pirq_eoi_map); pirq_eoi_map = NULL; |