From f2bbc0c8bf5ea565c9951fdb82416d346b38a599 Mon Sep 17 00:00:00 2001
From: "Lee, Chun-Yi" <jlee@suse.com>
Date: Tue, 7 Jul 2015 10:07:22 +0800
Subject: [PATCH v2 02/16] x86/efi: Add get and set variable to EFI services
 pointer table

Patch-mainline: Not yet, reviewing on linux-efi
References: fate#316350

Add get variable and set variable function to EFI services pointer
table for supporting later functions of hibernate signature
verification to keep the HMAC key in efi boot service variable.
EFI boot stub needs get/set_variable functions for accessing key.

Reviewed-by: Jiri Kosina <jkosina@suse.com>
Tested-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
---
 arch/x86/boot/compressed/eboot.c   |    4 ++++
 arch/x86/boot/compressed/head_32.S |    6 +++---
 arch/x86/boot/compressed/head_64.S |    8 ++++----
 arch/x86/include/asm/efi.h         |    2 ++
 4 files changed, 13 insertions(+), 7 deletions(-)

--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -31,12 +31,14 @@ static void setup_boot_services##bits(st
 {									\
 	efi_system_table_##bits##_t *table;				\
 	efi_boot_services_##bits##_t *bt;				\
+	efi_runtime_services_##bits##_t *rt;				\
 									\
 	table = (typeof(table))sys_table;				\
 									\
 	c->text_output = table->con_out;				\
 									\
 	bt = (typeof(bt))(unsigned long)(table->boottime);		\
+	rt = (typeof(rt))(unsigned long)(table->runtime);		\
 									\
 	c->allocate_pool = bt->allocate_pool;				\
 	c->allocate_pages = bt->allocate_pages;				\
@@ -46,6 +48,8 @@ static void setup_boot_services##bits(st
 	c->locate_handle = bt->locate_handle;				\
 	c->handle_protocol = bt->handle_protocol;			\
 	c->exit_boot_services = bt->exit_boot_services;			\
+	c->get_variable = rt->get_variable;				\
+	c->set_variable = rt->set_variable;				\
 }
 BOOT_SERVICES(32);
 BOOT_SERVICES(64);
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -54,7 +54,7 @@ ENTRY(efi_pe_entry)
 
 	/* Relocate efi_config->call() */
 	leal	efi32_config(%esi), %eax
-	add	%esi, 88(%eax)
+	add	%esi, 104(%eax)
 	pushl	%eax
 
 	call	make_boot_params
@@ -80,7 +80,7 @@ ENTRY(efi32_stub_entry)
 
 	/* Relocate efi_config->call() */
 	leal	efi32_config(%esi), %eax
-	add	%esi, 88(%eax)
+	add	%esi, 104(%eax)
 	pushl	%eax
 2:
 	call	efi_main
@@ -230,7 +230,7 @@ relocated:
 #ifdef CONFIG_EFI_STUB
 	.data
 efi32_config:
-	.fill 11,8,0
+	.fill 13,8,0
 	.long efi_call_phys
 	.long 0
 	.byte 0
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -255,7 +255,7 @@ ENTRY(efi_pe_entry)
 	/*
 	 * Relocate efi_config->call().
 	 */
-	addq	%rbp, efi64_config+88(%rip)
+	addq	%rbp, efi64_config+104(%rip)
 
 	movq	%rax, %rdi
 	call	make_boot_params
@@ -275,7 +275,7 @@ handover_entry:
 	 * Relocate efi_config->call().
 	 */
 	movq	efi_config(%rip), %rax
-	addq	%rbp, 88(%rax)
+	addq	%rbp, 104(%rax)
 2:
 	movq	efi_config(%rip), %rdi
 	call	efi_main
@@ -448,14 +448,14 @@ efi_config:
 #ifdef CONFIG_EFI_MIXED
 	.global efi32_config
 efi32_config:
-	.fill	11,8,0
+	.fill	13,8,0
 	.quad	efi64_thunk
 	.byte	0
 #endif
 
 	.global efi64_config
 efi64_config:
-	.fill	11,8,0
+	.fill	13,8,0
 	.quad	efi_call
 	.byte	1
 #endif /* CONFIG_EFI_STUB */
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -188,6 +188,8 @@ struct efi_config {
 	u64 handle_protocol;
 	u64 exit_boot_services;
 	u64 text_output;
+	u64 get_variable;
+	u64 set_variable;
 	efi_status_t (*call)(unsigned long, ...);
 	bool is64;
 } __packed;