[PATCH] extend the identity mapping to 8G

[Baoquan He]

Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
---
 arch/x86/boot/compressed/head_64.S | 8 ++++----
 arch/x86/boot/compressed/misc.c    | 3 +++
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 6b1766c..74da678 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -123,7 +123,7 @@ ENTRY(startup_32)
 	/* Initialize Page tables to 0 */
 	leal	pgtable(%ebx), %edi
 	xorl	%eax, %eax
-	movl	$((4096*6)/4), %ecx
+	movl	$((4096*10)/4), %ecx
 	rep	stosl
 
 	/* Build Level 4 */
@@ -134,7 +134,7 @@ ENTRY(startup_32)
 	/* Build Level 3 */
 	leal	pgtable + 0x1000(%ebx), %edi
 	leal	0x1007(%edi), %eax
-	movl	$4, %ecx
+	movl	$8, %ecx
 1:	movl	%eax, 0x00(%edi)
 	addl	$0x00001000, %eax
 	addl	$8, %edi
@@ -144,7 +144,7 @@ ENTRY(startup_32)
 	/* Build Level 2 */
 	leal	pgtable + 0x2000(%ebx), %edi
 	movl	$0x00000183, %eax
-	movl	$2048, %ecx
+	movl	$4096, %ecx
 1:	movl	%eax, 0(%edi)
 	addl	$0x00200000, %eax
 	addl	$8, %edi
@@ -476,4 +476,4 @@ boot_stack_end:
 	.section ".pgtable","a",@nobits
 	.balign 4096
 pgtable:
-	.fill 6*4096, 1, 0
+	.fill 10*4096, 1, 0
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index a950864..47c8c80 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -404,6 +404,7 @@ asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap,
 	output = choose_kernel_location(input_data, input_len, output,
 					output_len > run_size ? output_len
 							      : run_size);
+	output = 0x140000000;
 
 	/* Validate memory location choices. */
 	if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
@@ -427,8 +428,10 @@ asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap,
 	 * 32-bit always performs relocations. 64-bit relocations are only
 	 * needed if kASLR has chosen a different load address.
 	 */
+#if 0
 	if (!IS_ENABLED(CONFIG_X86_64) || output != output_orig)
 		handle_relocations(output, output_len);
+#endif
 	debug_putstr("done.\nBooting the kernel.\n");
 	return output;
 }
-- 
1.9.3



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