[V9 PATCH 8/8] pvh dom0: add opt_dom0pvh to setup.c

[Mukesh Rathor <mukesh.rathor@oracle.com>]

A pvh dom0 is booted by adding dom0pvh to grub xen command line.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---
 docs/misc/pvh-readme.txt |  2 ++
 xen/arch/x86/setup.c     | 12 +++++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/docs/misc/pvh-readme.txt b/docs/misc/pvh-readme.txt
index 9fea137..c5b3de4 100644
--- a/docs/misc/pvh-readme.txt
+++ b/docs/misc/pvh-readme.txt
@@ -37,6 +37,8 @@ supported. Phase I patches are broken into three parts:
    - tools changes for creating a PVH guest
    - boot of 64bit dom0 in PVH mode.
 
+To boot 64bit dom0 in PVH mode, add dom0pvh to grub xen command line.
+
 Following fixme's exist in the code:
   - arch/x86/time.c: support more tsc modes.
 
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index e9c2c51..bd35f65 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -61,6 +61,10 @@ integer_param("maxcpus", max_cpus);
 static bool_t __initdata disable_smep;
 invbool_param("smep", disable_smep);
 
+/* Boot dom0 in pvh mode */
+static bool_t __initdata opt_dom0pvh;
+boolean_param("dom0pvh", opt_dom0pvh);
+
 /* **** Linux config option: propagated to domain0. */
 /* "acpi=off":    Sisables both ACPI table parsing and interpreter. */
 /* "acpi=force":  Override the disable blacklist.                   */
@@ -541,7 +545,7 @@ void __init noreturn __start_xen(unsigned long mbi_p)
 {
     char *memmap_type = NULL;
     char *cmdline, *kextra, *loader;
-    unsigned int initrdidx;
+    unsigned int initrdidx, domcr_flags = 0;
     multiboot_info_t *mbi = __va(mbi_p);
     module_t *mod = (module_t *)__va(mbi->mods_addr);
     unsigned long nr_pages, raw_max_page, modules_headroom, *module_map;
@@ -1337,8 +1341,10 @@ void __init noreturn __start_xen(unsigned long mbi_p)
     if ( !tboot_protect_mem_regions() )
         panic("Could not protect TXT memory regions");
 
-    /* Create initial domain 0. */
-    dom0 = domain_create(0, DOMCRF_s3_integrity, 0);
+     /* Create initial domain 0. */
+     domcr_flags = (opt_dom0pvh ? DOMCRF_pvh | DOMCRF_hap : 0);
+     domcr_flags |= DOMCRF_s3_integrity;
+     dom0 = domain_create(0, domcr_flags, 0);
     if ( IS_ERR(dom0) || (alloc_dom0_vcpu0() == NULL) )
         panic("Error creating domain 0");
 
-- 
1.8.3.1