[Xen-changelog] [xen staging] xen:arm: Populate arm64 image header

[patchbot@xxxxxxx]

commit 17bd254a508f4174fe0d56a9f1b9892b7649b4b9
Author:     Amit Singh Tomar <amittomer25@xxxxxxxxx>
AuthorDate: Tue Sep 11 22:18:06 2018 +0530
Commit:     Julien Grall <julien.grall@xxxxxxx>
CommitDate: Mon Sep 24 14:42:53 2018 +0100

    xen:arm: Populate arm64 image header
    
    This patch adds image size and flags to XEN image header. It uses
    those fields according to the updated Linux kernel image definition.
    
    With this patch bootloader can now place XEN image anywhere in system
    RAM at 2MB aligned address without to worry about relocation.
    For instance, it fixes the XEN boot on Amlogic SoC where bootloader(U-BOOT)
    always relocates the XEN image to an address range reserved for firmware 
data.
    
    Signed-off-by: Amit Singh Tomar <amittomer25@xxxxxxxxx>
    Reviewed-by: Andre Pryzwara <andre.przywara@xxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/arch/arm/arm64/head.S | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index d63734fdfa..ef87b5c254 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -32,6 +32,13 @@
 #define PT_DEV    0xe71 /* nG=1 AF=1 SH=10 AP=01 NS=1 ATTR=100 T=0 P=1 */
 #define PT_DEV_L3 0xe73 /* nG=1 AF=1 SH=10 AP=01 NS=1 ATTR=100 T=1 P=1 */
 
+#define __HEAD_FLAG_PAGE_SIZE   ((PAGE_SHIFT - 10) / 2)
+
+#define __HEAD_FLAG_PHYS_BASE   1
+
+#define __HEAD_FLAGS            ((__HEAD_FLAG_PAGE_SIZE << 1) | \
+                                 (__HEAD_FLAG_PHYS_BASE << 3))
+
 #if (defined (CONFIG_EARLY_PRINTK)) && (defined (EARLY_PRINTK_INC))
 #include EARLY_PRINTK_INC
 #endif
@@ -120,8 +127,8 @@ efi_head:
         add     x13, x18, #0x16
         b       real_start           /* branch to kernel start */
         .quad   0                    /* Image load offset from start of RAM */
-        .quad   0                    /* reserved */
-        .quad   0                    /* reserved */
+        .quad   _end - start         /* Effective size of kernel image, 
little-endian */
+        .quad   __HEAD_FLAGS         /* Informative flags, little-endian */
         .quad   0                    /* reserved */
         .quad   0                    /* reserved */
         .quad   0                    /* reserved */
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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