[PATCH v5 10/44] x86/boot: introduce boot module flags

[Daniel P. Smith]

The existing startup code employs various ad-hoc state tracking about certain
boot module types by each area of the code. A boot module flags is added to
enable tracking these different states.  The first state to be transition by
this commit is module relocation.

Signed-off-by: Daniel P. Smith <dpsm...@apertussolutions.com>
---
 xen/arch/x86/include/asm/bootinfo.h | 4 ++++
 xen/arch/x86/setup.c                | 8 ++++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/include/asm/bootinfo.h 
b/xen/arch/x86/include/asm/bootinfo.h
index 6941a8975ea6..021ff0d93643 100644
--- a/xen/arch/x86/include/asm/bootinfo.h
+++ b/xen/arch/x86/include/asm/bootinfo.h
@@ -31,6 +31,10 @@ struct boot_module {
      */
     unsigned long headroom;
     enum bootmod_type type;
+
+    uint32_t flags;
+#define BOOTMOD_FLAG_X86_RELOCATED     (1U << 0)
+
 };
 
 /*
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 69c45f115523..161415a8e667 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -1354,7 +1354,6 @@ void asmlinkage __init noreturn __start_xen(unsigned long 
mbi_p)
             panic("Bootloader didn't honor module alignment request\n");
         bi->mods[i].mod->mod_end -= bi->mods[i].mod->mod_start;
         bi->mods[i].mod->mod_start >>= PAGE_SHIFT;
-        bi->mods[i].mod->reserved = 0;
     }
 
     /*
@@ -1470,7 +1469,7 @@ void asmlinkage __init noreturn __start_xen(unsigned long 
mbi_p)
 
             size = PAGE_ALIGN(bm->headroom + bm->mod->mod_end);
 
-            if ( bi->mods[j].mod->reserved )
+            if ( bi->mods[j].flags & BOOTMOD_FLAG_X86_RELOCATED )
                 continue;
 
             /* Don't overlap with other modules (or Xen itself). */
@@ -1489,7 +1488,7 @@ void asmlinkage __init noreturn __start_xen(unsigned long 
mbi_p)
                             bm->mod->mod_end);
                 bm->mod->mod_start = (end - size) >> PAGE_SHIFT;
                 bm->mod->mod_end += bm->headroom;
-                bm->mod->reserved = 1;
+                bm->flags |= BOOTMOD_FLAG_X86_RELOCATED;
             }
         }
 
@@ -1515,7 +1514,8 @@ void asmlinkage __init noreturn __start_xen(unsigned long 
mbi_p)
 #endif
     }
 
-    if ( bi->mods[0].headroom && !bi->mods[0].mod->reserved )
+    if ( bi->mods[0].headroom &&
+         !(bi->mods[0].flags & BOOTMOD_FLAG_X86_RELOCATED) )
         panic("Not enough memory to relocate the dom0 kernel image\n");
     for ( i = 0; i < bi->nr_modules; ++i )
     {
-- 
2.30.2