Add support for building the Linux kernel as a BDS target

2024-11-23 01:09:09 +00:00 · 2017-12-04 15:30:40 -05:00 · 2017-12-04 15:30:40 -05:00 · 5a188f5b46
commit 5a188f5b46
parent 517d242da5
2 changed files with 488 additions and 63 deletions
--- a/config/linux.config
+++ b/config/linux.config
@ -450,6 +450,7 @@ CONFIG_ARCH_RANDOM=y
 # CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is not set
 CONFIG_EFI=y
 CONFIG_EFI_STUB=y
+CONFIG_EFI_STUB_BDS=y
 # CONFIG_EFI_MIXED is not set
 # CONFIG_SECCOMP is not set
 # CONFIG_HZ_100 is not set
--- a/patches/linux-4.9.38.patch
+++ b/patches/linux-4.9.38.patch
@ -1,6 +1,16 @@
-diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux-4.9.38/arch/x86/boot/compressed/eboot.c
--- ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/arch/x86/boot/compressed/eboot.c	2017-09-22 14:55:37.055153767 -0400
+diff --recursive -u clean/linux-4.9.38/arch/x86/boot/compressed/early_serial_console.c linux-4.9.38/arch/x86/boot/compressed/early_serial_console.c
+--- clean/linux-4.9.38/arch/x86/boot/compressed/early_serial_console.c	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/boot/compressed/early_serial_console.c	2017-12-01 16:03:10.524787842 -0500
+@@ -1,5 +1,5 @@
+ #include "misc.h"
+ 
+-int early_serial_base;
+int early_serial_base = 0x3f8;
+ 
+ #include "../early_serial_console.c"
+diff --recursive -u clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux-4.9.38/arch/x86/boot/compressed/eboot.c
+--- clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/boot/compressed/eboot.c	2017-12-04 13:44:42.902439205 -0500
@@ -16,6 +16,71 @@
 #include "../string.h"
 #include "eboot.h"
@ -73,28 +83,7 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 static efi_system_table_t *sys_table;
 
 static struct efi_config *efi_early;
-@@ -249,6 +314,12 @@
- 
- void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
- {
-+#if 0
-+	while(*str)
-+	{
-+		write_serial((char) *str++);
-+	}
-+#else
- 	unsigned long output_string;
- 	size_t offset;
- 
-@@ -273,6 +344,7 @@
- 
- 		efi_early->call(*func, out, str);
- 	}
-+#endif
- }
- 
- static efi_status_t
-@@ -710,6 +782,100 @@
+@@ -710,6 +782,132 @@
 	}
 }
 
@ -192,13 +181,15 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 +	return -1;
 +}
 +
- /*
-  * Because the x86 boot code expects to be passed a boot_params we
-  * need to create one ourselves (usually the bootloader would create
-@@ -739,8 +905,18 @@
- 	sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
- 	handle = (void *)(unsigned long)efi_early->image_handle;
- 
+
+static int efi_early_init(struct efi_config * c)
+{
+	if (efi_early)
+		return 0;
+
+	efi_early = c;
+	sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
+
 +	if(!sys_table)
 +	{
 +		// We're NERFed and are the "DxeCore", so there is no system
@ -209,13 +200,43 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 +		   outb('!', 0x3f8);
 +	}
 +
- 	/* Check if we were booted by the EFI firmware */
-	if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+	/* Check if we were booted by the EFI firmware */
 +	if (!sys_table || sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+		return -1;
+
+	if (efi_early->is64)
+		setup_boot_services64(efi_early);
+	else
+		setup_boot_services32(efi_early);
+
+	return 0;
+}
+
+
+ /*
+  * Because the x86 boot code expects to be passed a boot_params we
+  * need to create one ourselves (usually the bootloader would create
+@@ -735,23 +933,17 @@
+ 	unsigned long ramdisk_addr;
+ 	unsigned long ramdisk_size;
+ 
+-	efi_early = c;
+-	sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
+-	handle = (void *)(unsigned long)efi_early->image_handle;
+serial_string("make_boot_params\r\n");
+ 
+-	/* Check if we were booted by the EFI firmware */
+-	if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+	if (efi_early_init(c) < 0)
 		return NULL;
 
- 	if (efi_early->is64)
-@@ -751,7 +927,6 @@
+-	if (efi_early->is64)
+-		setup_boot_services64(efi_early);
+-	else
+-		setup_boot_services32(efi_early);
+serial_string("early_init done\r\n");
+ 
+	handle = (void *)(unsigned long)efi_early->image_handle;
 	status = efi_call_early(handle_protocol, handle,
 				&proto, (void *)&image);
 	if (status != EFI_SUCCESS) {
@ -223,7 +244,7 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 		return NULL;
 	}
 
-@@ -814,6 +989,21 @@
+@@ -814,6 +1006,21 @@
 
 	if (status != EFI_SUCCESS)
 		goto fail2;
@ -245,7 +266,7 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 	hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
 	hdr->ramdisk_size  = ramdisk_size & 0xffffffff;
 	boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
-@@ -1068,6 +1262,7 @@
+@@ -1068,6 +1275,7 @@
 struct boot_params *efi_main(struct efi_config *c,
 			     struct boot_params *boot_params)
 {
@ -253,10 +274,332 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/eboot.c linux
 	struct desc_ptr *gdt = NULL;
 	efi_loaded_image_t *image;
 	struct setup_header *hdr = &boot_params->hdr;
-diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/head_64.S linux-4.9.38/arch/x86/boot/compressed/head_64.S
--- ../clean/linux-4.9.38/arch/x86/boot/compressed/head_64.S	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/arch/x86/boot/compressed/head_64.S	2017-09-20 10:58:06.101915625 -0400
-@@ -294,8 +294,12 @@
+@@ -1079,12 +1287,14 @@
+ 
+ 	efi_early = c;
+ 
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 	_table = (efi_system_table_t *)(unsigned long)efi_early->table;
+ 	handle = (void *)(unsigned long)efi_early->image_handle;
+ 	is64 = efi_early->is64;
+ 
+ 	sys_table = _table;
+ 
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 	/* Check if we were booted by the EFI firmware */
+ 	if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+ 		goto fail;
+@@ -1098,9 +1308,11 @@
+ 
+ 	setup_efi_pci(boot_params);
+ 
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 	status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
+ 				sizeof(*gdt), (void **)&gdt);
+ 	if (status != EFI_SUCCESS) {
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 		efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
+ 		goto fail;
+ 	}
+@@ -1124,6 +1336,7 @@
+ 					     hdr->pref_address,
+ 					     hdr->kernel_alignment);
+ 		if (status != EFI_SUCCESS) {
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 			efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
+ 			goto fail;
+ 		}
+@@ -1132,8 +1345,10 @@
+ 		hdr->code32_start = bzimage_addr;
+ 	}
+ 
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 	status = exit_boot(boot_params, handle, is64);
+ 	if (status != EFI_SUCCESS) {
+serial_string("efi_main "); serial_hex(__LINE__, 4);
+ 		efi_printk(sys_table, "exit_boot() failed!\n");
+ 		goto fail;
+ 	}
+@@ -1194,8 +1409,263 @@
+ 	asm volatile("cli");
+ 	asm volatile ("lgdt %0" : : "m" (*gdt));
+ 
+serial_string("efi_main done "); serial_hex(__LINE__, 4);
+ 	return boot_params;
+ fail:
+serial_string("efi_main failed "); serial_hex(__LINE__, 4);
+ 	efi_printk(sys_table, "efi_main() failed!\n");
+ 	return NULL;
+ }
+
+#ifdef CONFIG_EFI_STUB_BDS
+
+/*
+ * The LinuxBoot kernel is invoked as a DXE driver that registers
+ * the BDS (Boot Device Selector) protocol.  Once all of the DXE
+ * executables have run, the DxeCore dispatcher will jump into the
+ * BDS to choose what kernel to run.
+ *
+ * In our case, it is this kernel.  So we need to stash the config
+ * for when we are re-invoked.
+ */
+static void empty_function(void* unused) { (void) unused; }
+
+#define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x5ad34ba, 0x6f02, 0x4214,  0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
+#define EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID EFI_GUID(0x2f707ebb, 0x4a1a, 0x11d4, 0x9a, 0x38, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
+
+#define ROOT_BRIDGES_CONNECTED_EVENT_GROUP_GUID EFI_GUID(0x24a2d66f, 0xeedd, 0x4086,  0x90, 0x42, 0xf2, 0x6e, 0x47, 0x97, 0xee, 0x69)
+#define EFI_END_OF_DXE_EVENT_GROUP_GUID EFI_GUID(0x2ce967a, 0xdd7e, 0x4ffc,  0x9e, 0xe7, 0x81, 0xc, 0xf0, 0x47, 0x8, 0x80)
+#define EFI_DXE_SMM_READY_TO_LOCK_PROTOCOL_GUID EFI_GUID(0x60ff8964, 0xe906, 0x41d0,  0xaf, 0xed, 0xf2, 0x41, 0xe9, 0x74, 0xe0, 0x8e)
+
+
+
+
+static void * efi_find_table(uint32_t search_guid)
+{
+	const efi_system_table_64_t * st = (const void*) efi_early->table;
+	const efi_config_table_64_t * ct = (const void*) st->tables;
+
+serial_string("num tables=");
+serial_hex(st->nr_tables, 4);
+
+	for(int i = 0 ; i < st->nr_tables; i++)
+	{
+		const efi_guid_t * guid = &ct[i].guid;
+serial_hex(*(uint64_t*)guid, 16);
+		if (*(uint32_t*) guid == search_guid)
+			return (void*) ct[i].table;
+
+	}
+
+	return NULL;
+}
+
+
+static void efi_event_signal(efi_guid_t guid)
+{
+	efi_status_t status;
+	void * event = NULL;
+
+	status = efi_call_early(create_event_ex,
+		0x200, // EVT_NOTIFY_SIGNAL
+		8, // EFI_TPL_CALLBACK
+		empty_function,
+		NULL,
+		&guid,
+		&event
+	);
+	if (status)
+		serial_hex(status, 8);
+
+	status = efi_call_early(signal_event, event);
+	if (status)
+		serial_hex(status, 8);
+
+	status = efi_call_early(close_event, event);
+	if (status)
+		serial_hex(status, 8);
+}
+
+
+static efi_handle_t * handle_buffer;
+static const unsigned handle_buffer_size = 0x2000 * sizeof(*handle_buffer);
+
+
+static void efi_visit_handles(efi_guid_t * protocol, void (*callback)(efi_handle_t, void*), void* priv)
+{
+	unsigned handle_count = handle_buffer_size;
+	memset(handle_buffer, 0, handle_buffer_size);
+
+serial_string("efi_visit_handles ");
+serial_hex(protocol ? *(uint32_t*) protocol : 0, 8);
+
+	efi_status_t status = efi_call_early(locate_handle,
+		protocol ? 2 : 0, // ByProtocol vs AllHandles
+		protocol,
+		NULL,
+		&handle_count,
+		handle_buffer
+	);
+	if (status != 0)
+	{
+		serial_string("status=");
+		serial_hex(status, 8);
+		return;
+	}
+
+serial_string("handle_count=");
+serial_hex(handle_count, 8);
+
+	for(int i = 0 ; i < handle_count/sizeof(*handle_buffer) ; i++)
+	{
+		//serial_hex((uint64_t) handle_buffer[i], 16);
+		callback(handle_buffer[i], priv);
+	}
+}
+
+
+static void efi_connect_controllers(efi_handle_t handle, void * recursive_arg)
+{
+	efi_call_early(connect_controller, handle, NULL, NULL, recursive_arg ? 1 : 0);
+}
+
+
+void efi_platform_init(void)
+{
+	// setup something to be called whenever device path events are
+	// generated.  Ovmf just twiddles an atapi bit; ignoring for now
+
+	// connect all the pci root bridges
+serial_string("connect pci root brdiges\n");
+	efi_guid_t pci_protocol = EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID;
+	efi_visit_handles(&pci_protocol, efi_connect_controllers, (void*) 0);
+
+	// signal the acpi platform driver that it can download the ACPI tables
+serial_string("signal root bridges connected\n");
+	efi_event_signal(ROOT_BRIDGES_CONNECTED_EVENT_GROUP_GUID);
+
+	// signal that dxe is about to end
+serial_string("signal dxe end\n");
+	efi_event_signal(EFI_END_OF_DXE_EVENT_GROUP_GUID);
+
+	// Prevent further changes to LockBoxes or SMRAM.
+	// not necessary, but we probably want to do it for security
+	efi_handle_t handle = NULL;
+	efi_guid_t smm_ready_to_lock = EFI_DXE_SMM_READY_TO_LOCK_PROTOCOL_GUID;
+serial_string("signal smm ready to lock\n");
+	efi_call_early(install_protocol_interface,
+		&handle,
+		&smm_ready_to_lock,
+		0, // EFI_NATIVE_INTERFACE,
+		NULL
+	);
+}
+
+
+static void efi_bds_main(void)
+{
+	efi_status_t status;
+
+serial_string("bds_main 1\r\n");
+	efi_low_alloc(sys_table, handle_buffer_size, 1,
+			       (unsigned long *)&handle_buffer);
+serial_string("handle_buffer=");
+serial_hex((uint64_t) handle_buffer, 16);
+
+	// equivilant to PlatformBootManagerBeforeConsole
+	efi_platform_init();
+
+	// connect all drivers their contorllers
+	// this is copied from BmConnectAllDriversToAllControllers()
+	// the DXE services table is buried in the configuration
+	// table in the system table
+	const struct {
+		uint8_t pad[24 + 8 * 13]; // header and 13 functions
+		efi_status_t (*dispatch)(void);
+	} * dxe_services = efi_find_table(0x5ad34ba);
+
+	if (!dxe_services)
+		serial_string("No DXE system table found... will crash\n");
+	else {
+		serial_string("dispatch = ");
+		serial_hex((uint64_t) dxe_services->dispatch, 16);
+	}
+
+/**
+  Connect all the drivers to all the controllers.
+
+  This function makes sure all the current system drivers manage the correspoinding
+  controllers if have. And at the same time, makes sure all the system controllers
+  have driver to manage it if have.
+**/
+	do {
+		efi_visit_handles(NULL, efi_connect_controllers, (void*) 1);
+serial_string("bds_main dispatch\r\n");
+	} while(dxe_services->dispatch() == 0);
+
+	// free crashes, so just leak it
+	//serial_string("free\n");
+	//efi_call_early(free_pool, handle_buffer);
+
+	// signal that we're ready to boot, which will
+	// cause additional drivers to be loaded
+serial_string("bds_main 2\r\n");
+	efi_event_signal(EFI_EVENT_GROUP_READY_TO_BOOT);
+	
+	// jump back into the real kernel startup routine
+	extern __attribute__((noreturn)) void (*efi_restart)(void * bp);
+serial_string("bds_main 5\r\n");
+	asm( "jmp efi_restart" : : "d"(efi_early) );
+}
+
+static struct
+{
+	void (*bds_main)(void);
+} efi_bds_arch_protocol;
+
+
+int efi_bds_entry(struct efi_config *c)
+{
+	efi_status_t status;
+	efi_guid_t bds_guid = EFI_BDS_ARCH_PROTOCOL_GUID;
+
+	efi_loaded_image_t *image;
+	efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
+	void * handle;
+
+serial_string("bds_entry\r\n");
+
+	if (efi_early_init(c) < 0)
+		return -1;
+
+/*
+	handle = (void *)(unsigned long)efi_early->image_handle;
+	status = efi_call_early(handle_protocol, handle,
+				&proto, (void *)&image);
+serial_string(status ? "ERROR\r\n" : "OK\r\n");
+
+	// tell DxeCore where to call us when it is ready
+	// for the kernel to startup for real
+	struct efi_bds_arch_protocol * bds;
+	status = efi_low_alloc(sys_table, sizeof(*bds), 1,
+			       (unsigned long *)&bds);
+	bds->bds_main = efi_bds_main;
+	bds->config = c;
+*/
+
+	efi_bds_arch_protocol.bds_main = efi_bds_main;
+
+	handle = (void*)(uintptr_t) efi_early->image_handle;
+	status = efi_call_early(install_protocol_interface,
+		&handle,
+		&bds_guid,
+		0, // EFI_NATIVE_INTERFACE
+		&efi_bds_arch_protocol
+	);
+
+serial_string(status ? "ERROR\r\n" : "OK\r\n");
+
+	return 0;
+}
+
+#endif
+diff --recursive -u clean/linux-4.9.38/arch/x86/boot/compressed/head_64.S linux-4.9.38/arch/x86/boot/compressed/head_64.S
+--- clean/linux-4.9.38/arch/x86/boot/compressed/head_64.S	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/boot/compressed/head_64.S	2017-12-01 15:46:51.952803007 -0500
+@@ -268,6 +268,11 @@
+ 	addq	%rbp, efi64_config+32(%rip)
+ 
+ 	movq	%rax, %rdi
+#ifdef CONFIG_EFI_STUB_BDS // LinuxBoot (NERF) registers BDS and returns immediately
+	jmp	efi_bds_entry
+#endif
+.global efi_restart
+efi_restart:
+ 	call	make_boot_params
+ 	cmpq	$0,%rax
+ 	je	fail
+@@ -294,13 +299,18 @@
 	jne	2f
 fail:
 	/* EFI init failed, so hang. */
@ -270,9 +613,49 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/boot/compressed/head_64.S lin
 2:
 	movl	BP_code32_start(%esi), %eax
 	leaq	preferred_addr(%rax), %rax
-diff -u --recursive ../clean/linux-4.9.38/arch/x86/realmode/init.c linux-4.9.38/arch/x86/realmode/init.c
--- ../clean/linux-4.9.38/arch/x86/realmode/init.c	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/arch/x86/realmode/init.c	2017-09-20 10:58:06.101915625 -0400
+ 	jmp	*%rax
+ 
+.global preferred_addr
+ preferred_addr:
+ #endif
+ 
+diff --recursive -u clean/linux-4.9.38/arch/x86/boot/header.S linux-4.9.38/arch/x86/boot/header.S
+--- clean/linux-4.9.38/arch/x86/boot/header.S	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/boot/header.S	2017-12-01 09:59:11.737255340 -0500
+@@ -171,7 +171,11 @@
+ 
+ 	.long	0x200				# SizeOfHeaders
+ 	.long	0				# CheckSum
+#ifdef CONFIG_EFI_STUB_BDS
+	.word	0xb				# Subsystem (EFI boot service)
+#else
+ 	.word	0xa				# Subsystem (EFI application)
+#endif
+ 	.word	0				# DllCharacteristics
+ #ifdef CONFIG_X86_32
+ 	.long	0				# SizeOfStackReserve
+diff --recursive -u clean/linux-4.9.38/arch/x86/Kconfig linux-4.9.38/arch/x86/Kconfig
+--- clean/linux-4.9.38/arch/x86/Kconfig	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/Kconfig	2017-12-01 09:58:28.892507523 -0500
+@@ -1772,6 +1772,15 @@
+ 
+ 	  See Documentation/efi-stub.txt for more information.
+ 
+config EFI_STUB_BDS
+       bool "EFI BDS support"
+       depends on EFI_STUB
+       ---help---
+          This kernel feature allows a bzImage to act as the BDS
+          (Boot Device Selector) component of the EFI firmware.
+          Unless you're building a LinuxBoot system, you want to
+          say no.
+
+ config EFI_MIXED
+ 	bool "EFI mixed-mode support"
+ 	depends on EFI_STUB && X86_64
+diff --recursive -u clean/linux-4.9.38/arch/x86/realmode/init.c linux-4.9.38/arch/x86/realmode/init.c
+--- clean/linux-4.9.38/arch/x86/realmode/init.c	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/arch/x86/realmode/init.c	2017-10-11 18:38:36.027243511 -0400
@@ -35,8 +35,8 @@
 	/* Has to be under 1M so we can execute real-mode AP code. */
 	mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE);
@ -298,9 +681,9 @@ diff -u --recursive ../clean/linux-4.9.38/arch/x86/realmode/init.c linux-4.9.38/
 
 	setup_real_mode();
 	set_real_mode_permissions();
-diff -u --recursive ../clean/linux-4.9.38/drivers/acpi/acpica/evxfevnt.c linux-4.9.38/drivers/acpi/acpica/evxfevnt.c
--- ../clean/linux-4.9.38/drivers/acpi/acpica/evxfevnt.c	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/drivers/acpi/acpica/evxfevnt.c	2017-09-20 10:58:06.101915625 -0400
+diff --recursive -u clean/linux-4.9.38/drivers/acpi/acpica/evxfevnt.c linux-4.9.38/drivers/acpi/acpica/evxfevnt.c
+--- clean/linux-4.9.38/drivers/acpi/acpica/evxfevnt.c	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/drivers/acpi/acpica/evxfevnt.c	2017-10-11 18:38:36.027243511 -0400
@@ -111,6 +111,8 @@
 	}
 
@ -310,9 +693,9 @@ diff -u --recursive ../clean/linux-4.9.38/drivers/acpi/acpica/evxfevnt.c linux-4
 	return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
 }
 
-diff -u --recursive ../clean/linux-4.9.38/drivers/acpi/acpica/hwacpi.c linux-4.9.38/drivers/acpi/acpica/hwacpi.c
--- ../clean/linux-4.9.38/drivers/acpi/acpica/hwacpi.c	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/drivers/acpi/acpica/hwacpi.c	2017-09-20 10:58:06.101915625 -0400
+diff --recursive -u clean/linux-4.9.38/drivers/acpi/acpica/hwacpi.c linux-4.9.38/drivers/acpi/acpica/hwacpi.c
+--- clean/linux-4.9.38/drivers/acpi/acpica/hwacpi.c	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/drivers/acpi/acpica/hwacpi.c	2017-10-11 18:38:36.027243511 -0400
@@ -168,12 +168,16 @@
 
 	status = acpi_read_bit_register(ACPI_BITREG_SCI_ENABLE, &value);
@ -330,15 +713,56 @@ diff -u --recursive ../clean/linux-4.9.38/drivers/acpi/acpica/hwacpi.c linux-4.9
 		return_UINT32(ACPI_SYS_MODE_LEGACY);
 	}
 }
-diff -u --recursive ../clean/linux-4.9.38/init/initramfs.c linux-4.9.38/init/initramfs.c
--- ../clean/linux-4.9.38/init/initramfs.c	2017-07-15 06:17:55.000000000 -0400
-+++ linux-4.9.38/init/initramfs.c	2017-09-20 10:58:06.101915625 -0400
-@@ -609,7 +609,7 @@
- {
- 	char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
- 	if (err)
-		panic("%s", err); /* Failed to decompress INTERNAL initramfs */
-+		panic("%s: %s", __func__, err); /* Failed to decompress INTERNAL initramfs */
- 	if (initrd_start) {
- #ifdef CONFIG_BLK_DEV_RAM
- 		int fd;
+diff --recursive -u clean/linux-4.9.38/include/linux/efi.h linux-4.9.38/include/linux/efi.h
+--- clean/linux-4.9.38/include/linux/efi.h	2017-07-15 06:17:55.000000000 -0400
+++ linux-4.9.38/include/linux/efi.h	2017-11-30 13:46:12.391653428 -0500
+@@ -287,10 +287,10 @@
+ 	void *create_event;
+ 	void *set_timer;
+ 	void *wait_for_event;
+-	void *signal_event;
+-	void *close_event;
+	efi_status_t (*signal_event)(void *);
+	efi_status_t (*close_event)(void *);
+ 	void *check_event;
+-	void *install_protocol_interface;
+	efi_status_t (*install_protocol_interface)(efi_handle_t *, efi_guid_t *, int, void *);
+ 	void *reinstall_protocol_interface;
+ 	void *uninstall_protocol_interface;
+ 	efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
+@@ -308,20 +308,20 @@
+ 	void *get_next_monotonic_count;
+ 	void *stall;
+ 	void *set_watchdog_timer;
+-	void *connect_controller;
+	efi_status_t (*connect_controller)(efi_handle_t, efi_handle_t *, void **, unsigned);
+ 	void *disconnect_controller;
+ 	void *open_protocol;
+ 	void *close_protocol;
+ 	void *open_protocol_information;
+ 	void *protocols_per_handle;
+-	void *locate_handle_buffer;
+	efi_status_t (*locate_handle_buffer)(unsigned, efi_guid_t *, void *, unsigned *, efi_handle_t **);
+ 	efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
+ 	void *install_multiple_protocol_interfaces;
+ 	void *uninstall_multiple_protocol_interfaces;
+ 	void *calculate_crc32;
+ 	void *copy_mem;
+ 	void *set_mem;
+-	void *create_event_ex;
+	efi_status_t (*create_event_ex)(uint32_t type, unsigned tpl, void (*func)(void*), void *context, efi_guid_t *, void **event_out);
+ } efi_boot_services_t;
+ 
+ typedef enum {
+@@ -592,6 +592,11 @@
+ #define EFI_RNG_PROTOCOL_GUID			EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
+ #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID	EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
+ #define EFI_CONSOLE_OUT_DEVICE_GUID		EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
+#define EFI_BDS_ARCH_PROTOCOL_GUID		EFI_GUID(0x665E3FF6, 0x46CC, 0x11d4,  0x9A, 0x38, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D)
+#define EFI_EVENT_GROUP_READY_TO_BOOT		EFI_GUID(0x7ce88fb3, 0x4bd7, 0x4679,  0x87, 0xa8, 0xa8, 0xd8, 0xde, 0xe5, 0x0d, 0x2b)
+
+
+
+ 
+ /*
+  * This GUID is used to pass to the kernel proper the struct screen_info