[PATCH v5 25/44] x86/boot: convert create_dom0 to use boot info

["Daniel P. Smith" <dpsmith@apertussolutions.com>]

This commit changes create_dom0 to no longer take the individual components and
take struct boot_info instead. Internally, it is changed to locate the kernel
and ramdisk details from struct boot_info.

Signed-off-by: Daniel P. Smith <dpsmith@apertussolutions.com>
---
 xen/arch/x86/setup.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 0d2ee19998aa..c2bcddc50990 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -946,10 +946,8 @@ static unsigned int __init copy_bios_e820(struct e820entry *map, unsigned int li
     return n;
 }
 
-static struct domain *__init create_dom0(const module_t *image,
-                                         unsigned long headroom,
-                                         module_t *initrd, const char *kextra,
-                                         const char *loader)
+static struct domain *__init create_dom0(const struct boot_info *bi,
+                                         const char *kextra)
 {
     static char __initdata cmdline[MAX_GUEST_CMDLINE];
 
@@ -964,9 +962,21 @@ static struct domain *__init create_dom0(const module_t *image,
             .misc_flags = opt_dom0_msr_relaxed ? XEN_X86_MSR_RELAXED : 0,
         },
     };
+    int headroom, mod_idx = first_boot_module_index(bi, BOOTMOD_RAMDISK);
+    module_t *image, *initrd;
     struct domain *d;
     domid_t domid;
 
+    /* Map boot_module to mb1 module for dom0 */
+    image = bi->mods[0].mod;
+    headroom = bi->mods[0].headroom;
+
+    /* Map boot_module to mb1 module for initrd */
+    if ( mod_idx < 0 )
+        initrd = NULL;
+    else
+        initrd = bi->mods[mod_idx].mod;
+
     if ( opt_dom0_pvh )
     {
         dom0_cfg.flags |= (XEN_DOMCTL_CDF_hvm |
@@ -995,7 +1005,7 @@ static struct domain *__init create_dom0(const module_t *image,
     if ( image->string || kextra )
     {
         if ( image->string )
-            safe_strcpy(cmdline, cmdline_cook(__va(image->string), loader));
+            safe_strcpy(cmdline, cmdline_cook(__va(image->string), bi->loader));
 
         if ( kextra )
             /* kextra always includes exactly one leading space. */
@@ -2106,10 +2116,7 @@ void asmlinkage __init noreturn __start_xen(unsigned long mbi_p)
      * We're going to setup domain0 using the module(s) that we stashed safely
      * above our heap. The second module, if present, is an initrd ramdisk.
      */
-    dom0 = create_dom0(bi->mods[0].mod, bi->mods[0].headroom,
-                       (initrdidx >= 0 && initrdidx < bi->nr_modules) ?
-                            bi->mods[initrdidx].mod : NULL,
-                       kextra, bi->loader);
+    dom0 = create_dom0(bi, kextra);
     if ( !dom0 )
         panic("Could not set up DOM0 guest OS\n");
 
-- 
2.30.2