new file mode 100644
@@ -0,0 +1,45 @@
+#ifndef __ARCH_X86_BOOTINFO_H__
+#define __ARCH_X86_BOOTINFO_H__
+
+/* unused for x86 */
+struct arch_bootstring { };
+
+struct __packed arch_bootmodule {
+#define BOOTMOD_FLAG_X86_RELOCATED 1U << 0
+ uint32_t flags;
+ uint32_t headroom;
+};
+
+struct __packed arch_boot_info {
+ uint32_t flags;
+#define BOOTINFO_FLAG_X86_MEMLIMITS 1U << 0
+#define BOOTINFO_FLAG_X86_BOOTDEV 1U << 1
+#define BOOTINFO_FLAG_X86_CMDLINE 1U << 2
+#define BOOTINFO_FLAG_X86_MODULES 1U << 3
+#define BOOTINFO_FLAG_X86_AOUT_SYMS 1U << 4
+#define BOOTINFO_FLAG_X86_ELF_SYMS 1U << 5
+#define BOOTINFO_FLAG_X86_MEMMAP 1U << 6
+#define BOOTINFO_FLAG_X86_DRIVES 1U << 7
+#define BOOTINFO_FLAG_X86_BIOSCONFIG 1U << 8
+#define BOOTINFO_FLAG_X86_LOADERNAME 1U << 9
+#define BOOTINFO_FLAG_X86_APM 1U << 10
+
+ char *boot_loader_name;
+
+ uint32_t mem_lower;
+ uint32_t mem_upper;
+
+ uint32_t mmap_length;
+ paddr_t mmap_addr;
+};
+
+struct __packed mb_memmap {
+ uint32_t size;
+ uint32_t base_addr_low;
+ uint32_t base_addr_high;
+ uint32_t length_low;
+ uint32_t length_high;
+ uint32_t type;
+};
+
+#endif
new file mode 100644
@@ -0,0 +1,54 @@
+#ifndef __XEN_BOOTINFO_H__
+#define __XEN_BOOTINFO_H__
+
+#include <xen/mm.h>
+#include <xen/types.h>
+
+#include <asm/bootinfo.h>
+
+typedef enum {
+ BOOTMOD_UNKNOWN,
+ BOOTMOD_XEN,
+ BOOTMOD_FDT,
+ BOOTMOD_KERNEL,
+ BOOTMOD_RAMDISK,
+ BOOTMOD_XSM,
+ BOOTMOD_UCODE,
+ BOOTMOD_GUEST_DTB,
+} bootmodule_kind;
+
+typedef enum {
+ BOOTSTR_EMPTY,
+ BOOTSTR_STRING,
+ BOOTSTR_CMDLINE,
+} bootstring_kind;
+
+#define BOOTMOD_MAX_STRING 1024
+struct __packed boot_string {
+ bootstring_kind kind;
+ struct arch_bootstring *arch;
+
+ char bytes[BOOTMOD_MAX_STRING];
+ size_t len;
+};
+
+struct __packed boot_module {
+ bootmodule_kind kind;
+ paddr_t start;
+ mfn_t mfn;
+ size_t size;
+
+ struct arch_bootmodule *arch;
+ struct boot_string string;
+};
+
+struct __packed boot_info {
+ char *cmdline;
+
+ uint32_t nr_mods;
+ struct boot_module *mods;
+
+ struct arch_boot_info *arch;
+};
+
+#endif
The x86 and Arm architectures represent in memory the general boot information and boot modules differently despite having commonality. The x86 representations are bound to the multiboot v1 structures while the Arm representations are a slightly generalized meta-data container for the boot material. The multiboot structure does not lend itself well to being expanded to accommodate additional metadata, both general and boot module specific. The Arm structures are not bound to an external specification and thus are able to be expanded for solutions such as dom0less. This commit introduces a set of structures patterned off the Arm structures to represent the boot information in a manner that captures common data. The structures provide an arch field to allow arch specific expansions to the structures. The intended goal of these new common structures is to enable commonality between the different architectures. Specifically to enable dom0less and hyperlaunch to have a common representation of boot-time constructed domains. Signed-off-by: Daniel P. Smith <dpsmith@apertussolutions.com> --- xen/arch/x86/include/asm/bootinfo.h | 45 ++++++++++++++++++++++++ xen/include/xen/bootinfo.h | 54 +++++++++++++++++++++++++++++ 2 files changed, 99 insertions(+) create mode 100644 xen/arch/x86/include/asm/bootinfo.h create mode 100644 xen/include/xen/bootinfo.h