[RFC 14/38] x86/hyperlaunch: move pvh p2m init to domain builder

["Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>]

Generalize pvh_init_p2m() for use on domU and relocate under the domain
builder. To support moving the function, dom0_pvh_setup_e820() was exported.

Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/dom0_build.c         | 23 +----------------------
 xen/arch/x86/hvm/dom_build.c          | 25 +++++++++++++++++++++++++
 xen/arch/x86/include/asm/dom0_build.h |  2 ++
 3 files changed, 28 insertions(+), 22 deletions(-)

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index f59af0e72810..4a371dfd66d7 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -323,7 +323,7 @@ static int __init pvh_setup_vmx_realmode_helpers(struct 
domain *d)
     return 0;
 }
 
-static __init void pvh_setup_e820(struct domain *d, unsigned long nr_pages)
+void __init dom0_pvh_setup_e820(struct domain *d, unsigned long nr_pages)
 {
     struct e820entry *entry, *entry_guest;
     unsigned int i;
@@ -399,20 +399,6 @@ static __init void pvh_setup_e820(struct domain *d, 
unsigned long nr_pages)
     ASSERT(cur_pages == nr_pages);
 }
 
-static void __init pvh_init_p2m(struct boot_domain *bd)
-{
-    unsigned long nr_pages = dom_compute_nr_pages(bd, NULL);
-    bool preempted;
-
-    pvh_setup_e820(bd->d, nr_pages);
-    do {
-        preempted = false;
-        paging_set_allocation(bd->d, dom_paging_pages(bd, nr_pages),
-                              &preempted);
-        process_pending_softirqs();
-    } while ( preempted );
-}
-
 static int __init pvh_populate_p2m(struct domain *d)
 {
     struct vcpu *v = d->vcpu[0];
@@ -1319,13 +1305,6 @@ int __init dom0_construct_pvh(struct boot_domain *bd)
     struct domain *d = bd->d;
     int rc;
 
-    /*
-     * Craft dom0 physical memory map and set the paging allocation. This must
-     * be done before the iommu initializion, since iommu initialization code
-     * will likely add mappings required by devices to the p2m (ie: RMRRs).
-     */
-    pvh_init_p2m(bd);
-
     iommu_hwdom_init(d);
 
     rc = pvh_populate_p2m(d);
diff --git a/xen/arch/x86/hvm/dom_build.c b/xen/arch/x86/hvm/dom_build.c
index b6e534226434..05064ae9ba96 100644
--- a/xen/arch/x86/hvm/dom_build.c
+++ b/xen/arch/x86/hvm/dom_build.c
@@ -10,13 +10,16 @@
 
 #include <xen/acpi.h>
 #include <xen/init.h>
+#include <xen/softirq.h>
 #include <xen/types.h>
 
 #include <acpi/actables.h>
 
 #include <asm/bootinfo.h>
 #include <asm/dom0_build.h>
+#include <asm/domain-builder.h>
 #include <asm/hvm/io.h>
+#include <asm/paging.h>
 #include <asm/pci.h>
 
 static void __hwdom_init pvh_setup_mmcfg(struct domain *d)
@@ -37,6 +40,20 @@ static void __hwdom_init pvh_setup_mmcfg(struct domain *d)
     }
 }
 
+static void __init pvh_init_p2m(struct boot_domain *bd)
+{
+    unsigned long nr_pages = dom_compute_nr_pages(bd, NULL);
+    bool preempted;
+
+    dom0_pvh_setup_e820(bd->d, nr_pages);
+    do {
+        preempted = false;
+        paging_set_allocation(bd->d, dom_paging_pages(bd, nr_pages),
+                              &preempted);
+        process_pending_softirqs();
+    } while ( preempted );
+}
+
 int __init dom_construct_pvh(struct boot_domain *bd)
 {
     int rc;
@@ -67,6 +84,14 @@ int __init dom_construct_pvh(struct boot_domain *bd)
         }
     }
 
+    /*
+     * Craft domain physical memory map and set the paging allocation. This
+     * must be done before the iommu initializion, since iommu initialization
+     * code will likely add mappings required by devices to the p2m (ie:
+     * RMRRs).
+     */
+    pvh_init_p2m(bd);
+
     return dom0_construct_pvh(bd);
 }
 
diff --git a/xen/arch/x86/include/asm/dom0_build.h 
b/xen/arch/x86/include/asm/dom0_build.h
index 43a402af15b7..e5debd5adf9f 100644
--- a/xen/arch/x86/include/asm/dom0_build.h
+++ b/xen/arch/x86/include/asm/dom0_build.h
@@ -18,6 +18,8 @@ void calculate_dom0_pages(struct boot_domain *bd, unsigned 
long avail);
 void dom0_pv_restrict_pages(
     struct boot_domain *bd, struct elf_dom_parms *parms);
 
+void dom0_pvh_setup_e820(struct domain *d, unsigned long nr_pages);
+
 int dom0_construct_pv(struct boot_domain *bd);
 int dom0_construct_pvh(struct boot_domain *bd);
 
-- 
2.30.2