xen_pvh: Support building a standalone image

Support mkimage for xen_pvh.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Hans van Kranenburg <hans@knorrie.org>

include/grub/util/mkimage.h

@@ -71,7 +71,8 @@ struct grub_install_image_target_desc
     IMAGE_I386_IEEE1275,
     IMAGE_LOONGSON_ELF, IMAGE_QEMU, IMAGE_PPC, IMAGE_YEELOONG_FLASH,
     IMAGE_FULOONG2F_FLASH, IMAGE_I386_PC_PXE, IMAGE_MIPS_ARC,
-    IMAGE_QEMU_MIPS_FLASH, IMAGE_UBOOT, IMAGE_XEN, IMAGE_I386_PC_ELTORITO
+    IMAGE_QEMU_MIPS_FLASH, IMAGE_UBOOT, IMAGE_XEN, IMAGE_I386_PC_ELTORITO,
+    IMAGE_XEN_PVH
   } id;
   enum
     {

util/grub-mkimage32.c

@@ -17,7 +17,9 @@
 # define ELF_R_SYM(val)		ELF32_R_SYM(val)
 # define ELF_R_TYPE(val)		ELF32_R_TYPE(val)
 # define ELF_ST_TYPE(val)		ELF32_ST_TYPE(val)
-#define XEN_NOTE_SIZE 132
+
+#define XEN_NOTE_SIZE		132
+#define XEN_PVH_NOTE_SIZE	20
 
 #ifndef GRUB_MKIMAGEXX
 #include "grub-mkimagexx.c"

util/grub-mkimage64.c

@@ -17,7 +17,9 @@
 # define ELF_R_SYM(val)		ELF64_R_SYM(val)
 # define ELF_R_TYPE(val)		ELF64_R_TYPE(val)
 # define ELF_ST_TYPE(val)		ELF64_ST_TYPE(val)
-#define XEN_NOTE_SIZE 120
+
+#define XEN_NOTE_SIZE		120
+#define XEN_PVH_NOTE_SIZE	24
 
 #ifndef GRUB_MKIMAGEXX
 #include "grub-mkimagexx.c"

util/grub-mkimagexx.c

@@ -229,12 +229,12 @@ SUFFIX (grub_mkimage_generate_elf) (const struct grub_install_image_target_desc
       phnum++;
       footer_size += sizeof (struct grub_ieee1275_note);
     }
-  if (image_target->id == IMAGE_XEN)
+  if (image_target->id == IMAGE_XEN || image_target->id == IMAGE_XEN_PVH)
     {
       phnum++;
       shnum++;
       string_size += sizeof (".xen");
-      footer_size += XEN_NOTE_SIZE;
+      footer_size += (image_target->id == IMAGE_XEN) ? XEN_NOTE_SIZE : XEN_PVH_NOTE_SIZE;
     }
   header_size = ALIGN_UP (sizeof (*ehdr) + phnum * sizeof (*phdr)
 			  + shnum * sizeof (*shdr) + string_size, layout->align);
@@ -421,6 +421,39 @@ SUFFIX (grub_mkimage_generate_elf) (const struct grub_install_image_target_desc
       phdr->p_offset = grub_host_to_target32 (header_size + program_size);
     }
 
+  if (image_target->id == IMAGE_XEN_PVH)
+    {
+      char *note_start = (elf_img + program_size + header_size);
+      Elf_Nhdr *note_ptr;
+      char *ptr = (char *) note_start;
+
+      grub_util_info ("adding XEN NOTE segment");
+
+      /* Phys32 Entry.  */
+      note_ptr = (Elf_Nhdr *) ptr;
+      note_ptr->n_namesz = grub_host_to_target32 (sizeof (GRUB_XEN_NOTE_NAME));
+      note_ptr->n_descsz = grub_host_to_target32 (image_target->voidp_sizeof);
+      note_ptr->n_type = grub_host_to_target32 (XEN_ELFNOTE_PHYS32_ENTRY);
+      ptr += sizeof (Elf_Nhdr);
+      memcpy (ptr, GRUB_XEN_NOTE_NAME, sizeof (GRUB_XEN_NOTE_NAME));
+      ptr += ALIGN_UP (sizeof (GRUB_XEN_NOTE_NAME), 4);
+      memset (ptr, 0, image_target->voidp_sizeof);
+      *(grub_uint32_t *) ptr = GRUB_KERNEL_I386_XEN_PVH_LINK_ADDR;
+      ptr += image_target->voidp_sizeof;
+
+      assert (XEN_PVH_NOTE_SIZE == (ptr - note_start));
+
+      phdr++;
+      phdr->p_type = grub_host_to_target32 (PT_NOTE);
+      phdr->p_flags = grub_host_to_target32 (PF_R);
+      phdr->p_align = grub_host_to_target32 (image_target->voidp_sizeof);
+      phdr->p_vaddr = 0;
+      phdr->p_paddr = 0;
+      phdr->p_filesz = grub_host_to_target32 (XEN_PVH_NOTE_SIZE);
+      phdr->p_memsz = 0;
+      phdr->p_offset = grub_host_to_target32 (header_size + program_size);
+    }
+
   if (note)
     {
       int note_size = sizeof (struct grub_ieee1275_note);
@@ -496,7 +529,7 @@ SUFFIX (grub_mkimage_generate_elf) (const struct grub_install_image_target_desc
     shdr->sh_entsize = grub_host_to_target32 (0);
     shdr++;
 
-    if (image_target->id == IMAGE_XEN)
+    if (image_target->id == IMAGE_XEN || image_target->id == IMAGE_XEN_PVH)
       {
 	memcpy (ptr, ".xen", sizeof (".xen"));
 	shdr->sh_name = grub_host_to_target32 (ptr - str_start);
@@ -504,7 +537,10 @@ SUFFIX (grub_mkimage_generate_elf) (const struct grub_install_image_target_desc
 	shdr->sh_type = grub_host_to_target32 (SHT_PROGBITS);
 	shdr->sh_addr = grub_host_to_target_addr (target_addr + layout->kernel_size);
 	shdr->sh_offset = grub_host_to_target_addr (program_size + header_size);
-	shdr->sh_size = grub_host_to_target32 (XEN_NOTE_SIZE);
+	if (image_target->id == IMAGE_XEN)
+	  shdr->sh_size = grub_host_to_target32 (XEN_NOTE_SIZE);
+	else
+	  shdr->sh_size = grub_host_to_target32 (XEN_PVH_NOTE_SIZE);
 	shdr->sh_link = grub_host_to_target32 (0);
 	shdr->sh_info = grub_host_to_target32 (0);
 	shdr->sh_addralign = grub_host_to_target32 (image_target->voidp_sizeof);

util/mkimage.c

@@ -132,6 +132,24 @@ static const struct grub_install_image_target_desc image_targets[] =
       .link_addr = GRUB_KERNEL_I386_PC_LINK_ADDR,
       .default_compression = GRUB_COMPRESSION_LZMA
     },
+    {
+      .dirname = "i386-xen_pvh",
+      .names = { "i386-xen_pvh", NULL },
+      .voidp_sizeof = 4,
+      .bigendian = 0,
+      .id = IMAGE_XEN_PVH,
+      .flags = PLATFORM_FLAGS_NONE,
+      .total_module_size = TARGET_NO_FIELD,
+      .decompressor_compressed_size = TARGET_NO_FIELD,
+      .decompressor_uncompressed_size = TARGET_NO_FIELD,
+      .decompressor_uncompressed_addr = TARGET_NO_FIELD,
+      .elf_target = EM_386,
+      .section_align = 1,
+      .vaddr_offset = 0,
+      .link_addr = GRUB_KERNEL_I386_XEN_PVH_LINK_ADDR,
+      .mod_align = GRUB_KERNEL_I386_XEN_PVH_MOD_ALIGN,
+      .link_align = 4
+    },
     {
       .dirname = "i386-pc",
       .names = { "i386-pc-pxe", NULL },
@@ -860,7 +878,8 @@ grub_install_generate_image (const char *dir, const char *prefix,
   else
     kernel_img = grub_mkimage_load_image64 (kernel_path, total_module_size,
 					    &layout, image_target);
-  if (image_target->id == IMAGE_XEN && layout.align < 4096)
+  if ((image_target->id == IMAGE_XEN || image_target->id == IMAGE_XEN_PVH) &&
+      layout.align < 4096)
     layout.align = 4096;
 
   if ((image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS)
@@ -1103,6 +1122,7 @@ grub_install_generate_image (const char *dir, const char *prefix,
     case IMAGE_MIPS_ARC:
     case IMAGE_QEMU_MIPS_FLASH:
     case IMAGE_XEN:
+    case IMAGE_XEN_PVH:
       break;
     case IMAGE_SPARC64_AOUT:
     case IMAGE_SPARC64_RAW:
@@ -1679,6 +1699,7 @@ grub_install_generate_image (const char *dir, const char *prefix,
     case IMAGE_LOONGSON_ELF:
     case IMAGE_PPC:
     case IMAGE_XEN:
+    case IMAGE_XEN_PVH:
     case IMAGE_COREBOOT:
     case IMAGE_I386_IEEE1275:
       {