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authorJane Malalane <jane.malalane@citrix.com>2022-07-29 10:04:16 +0300
committerJuergen Gross <jgross@suse.com>2022-08-12 12:28:21 +0300
commitb1c3497e604ddccea5af4071831ed0e4680fb35e (patch)
tree108b8bd765f1e0496592013bb988ac329ca19de9 /include
parent251e90e7e346a23742b90e2c4db19d322e071d99 (diff)
downloadlinux-b1c3497e604ddccea5af4071831ed0e4680fb35e.tar.xz
x86/xen: Add support for HVMOP_set_evtchn_upcall_vector
Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in order to set the per-vCPU event channel vector callback on Linux and use it in preference of HVM_PARAM_CALLBACK_IRQ. If the per-VCPU vector setup is successful on BSP, use this method for the APs. If not, fallback to the global vector-type callback. Also register callback_irq at per-vCPU event channel setup to trick toolstack to think the domain is enlightened. Suggested-by: "Roger Pau Monné" <roger.pau@citrix.com> Signed-off-by: Jane Malalane <jane.malalane@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Link: https://lore.kernel.org/r/20220729070416.23306-1-jane.malalane@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include')
-rw-r--r--include/xen/hvm.h2
-rw-r--r--include/xen/interface/hvm/hvm_op.h19
2 files changed, 21 insertions, 0 deletions
diff --git a/include/xen/hvm.h b/include/xen/hvm.h
index b7fd7fc9ad41..8da7a6747058 100644
--- a/include/xen/hvm.h
+++ b/include/xen/hvm.h
@@ -60,4 +60,6 @@ static inline int hvm_get_parameter(int idx, uint64_t *value)
void xen_setup_callback_vector(void);
+int xen_set_upcall_vector(unsigned int cpu);
+
#endif /* XEN_HVM_H__ */
diff --git a/include/xen/interface/hvm/hvm_op.h b/include/xen/interface/hvm/hvm_op.h
index f3097e79bb03..03134bf3cec1 100644
--- a/include/xen/interface/hvm/hvm_op.h
+++ b/include/xen/interface/hvm/hvm_op.h
@@ -46,4 +46,23 @@ struct xen_hvm_get_mem_type {
};
DEFINE_GUEST_HANDLE_STRUCT(xen_hvm_get_mem_type);
+#if defined(__i386__) || defined(__x86_64__)
+
+/*
+ * HVMOP_set_evtchn_upcall_vector: Set a <vector> that should be used for event
+ * channel upcalls on the specified <vcpu>. If set,
+ * this vector will be used in preference to the
+ * domain global callback via (see
+ * HVM_PARAM_CALLBACK_IRQ).
+ */
+#define HVMOP_set_evtchn_upcall_vector 23
+struct xen_hvm_evtchn_upcall_vector {
+ uint32_t vcpu;
+ uint8_t vector;
+};
+typedef struct xen_hvm_evtchn_upcall_vector xen_hvm_evtchn_upcall_vector_t;
+DEFINE_GUEST_HANDLE_STRUCT(xen_hvm_evtchn_upcall_vector_t);
+
+#endif /* defined(__i386__) || defined(__x86_64__) */
+
#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */