[PATCH v5 p2 13/19] tools/libxl: Create a per-arch function to map IRQ to a domain

[Julien Grall <julien.grall@citrix.com>]

From: Julien Grall <julien.grall@linaro.org>

ARM and x86 use a different hypercall to map an IRQ to a domain.

The hypercall to give IRQ permission to the domain has also been moved
to be an x86 specific function as ARM guest won't be able to manage the IRQ.
We may want to support it later.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>

---
    Changes in v5:
        - Use the new function xc_domain_bind_pt_spi_irq
        - Fix typoes

    Changes in v4:
        - Patch added
---
 tools/libxl/libxl_arch.h   |  4 ++++
 tools/libxl/libxl_arm.c    |  5 +++++
 tools/libxl/libxl_create.c |  6 ++----
 tools/libxl/libxl_x86.c    | 13 +++++++++++++
 4 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/tools/libxl/libxl_arch.h b/tools/libxl/libxl_arch.h
index cae64c0..77b1f2a 100644
--- a/tools/libxl/libxl_arch.h
+++ b/tools/libxl/libxl_arch.h
@@ -39,4 +39,8 @@ int libxl__arch_vnuma_build_vmemrange(libxl__gc *gc,
                                       uint32_t domid,
                                       libxl_domain_build_info *b_info,
                                       libxl__domain_build_state *state);
+
+/* arch specific irq map function */
+int libxl__arch_domain_map_irq(libxl__gc *gc, uint32_t domid, int irq);
+
 #endif
diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
index 5a5cb3f..aa302fd 100644
--- a/tools/libxl/libxl_arm.c
+++ b/tools/libxl/libxl_arm.c
@@ -742,6 +742,11 @@ int libxl__arch_vnuma_build_vmemrange(libxl__gc *gc,
     return libxl__vnuma_build_vmemrange_pv_generic(gc, domid, info, state);
 }
 
+int libxl__arch_domain_map_irq(libxl__gc *gc, uint32_t domid, int irq)
+{
+    return xc_domain_bind_pt_spi_irq(CTX->xch, domid, irq);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index e5a343f..15b464e 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -1205,11 +1205,9 @@ static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *multidev,
 
         LOG(DEBUG, "dom%d irq %d", domid, irq);
 
-        ret = irq >= 0 ? xc_physdev_map_pirq(CTX->xch, domid, irq, &irq)
+        ret = irq >= 0 ? libxl__arch_domain_map_irq(gc, domid, irq)
                        : -EOVERFLOW;
-        if (!ret)
-            ret = xc_domain_irq_permission(CTX->xch, domid, irq, 1);
-        if (ret < 0) {
+        if (ret) {
             LOGE(ERROR, "failed give dom%d access to irq %d", domid, irq);
             ret = ERROR_FAIL;
             goto error_out;
diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c
index 5e9a8d2..ed2bd38 100644
--- a/tools/libxl/libxl_x86.c
+++ b/tools/libxl/libxl_x86.c
@@ -424,6 +424,19 @@ out:
     return rc;
 }
 
+int libxl__arch_domain_map_irq(libxl__gc *gc, uint32_t domid, int irq)
+{
+    int ret;
+
+    ret = xc_physdev_map_pirq(CTX->xch, domid, irq, &irq);
+    if (ret)
+        return ret;
+
+    ret = xc_domain_irq_permission(CTX->xch, domid, irq, 1);
+
+    return ret;
+}
+
 /*
  * Local variables:
  * mode: C
-- 
2.1.4