[Xen-changelog] [xen-unstable] [IA64] Fix dom0 load address

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1181853375 21600
# Node ID da5f8f1961e577d72740c242a448328f6ce8b11e
# Parent  96617c4f19aaefa5ae5f1ceef6b5734f3c76c2ce
[IA64] Fix dom0 load address

Calculate load address of dom0 image based on xen_pstart rather than
address from ELF image.

Signed-off-by: Jes Sorensen <jes@xxxxxxx>
---
 xen/arch/ia64/xen/domain.c |   24 +++++++++++++++++++++---
 1 files changed, 21 insertions(+), 3 deletions(-)

diff -r 96617c4f19aa -r da5f8f1961e5 xen/arch/ia64/xen/domain.c
--- a/xen/arch/ia64/xen/domain.c        Tue Jun 12 20:41:08 2007 -0600
+++ b/xen/arch/ia64/xen/domain.c        Thu Jun 14 14:36:15 2007 -0600
@@ -1104,7 +1104,8 @@ int shadow_mode_control(struct domain *d
 #define        privify_memory(x,y) do {} while(0)
 #endif
 
-static void __init loaddomainelfimage(struct domain *d, struct elf_binary *elf)
+static void __init loaddomainelfimage(struct domain *d, struct elf_binary *elf,
+                                     unsigned long phys_load_offset)
 {
        const elf_phdr *phdr;
        int phnum, h, filesz, memsz;
@@ -1121,6 +1122,7 @@ static void __init loaddomainelfimage(st
                memsz = elf_uval(elf, phdr, p_memsz);
                elfaddr = (unsigned long) elf->image + elf_uval(elf, phdr, 
p_offset);
                dom_mpaddr = elf_uval(elf, phdr, p_paddr);
+               dom_mpaddr += phys_load_offset;
 
                while (memsz > 0) {
                        p = assign_new_domain_page(d,dom_mpaddr);
@@ -1211,6 +1213,7 @@ int __init construct_dom0(struct domain 
        unsigned long pkern_end;
        unsigned long pinitrd_start = 0;
        unsigned long pstart_info;
+       unsigned long phys_load_offset;
        struct page_info *start_info_page;
        unsigned long bp_mpa;
        struct ia64_boot_param *bp;
@@ -1238,6 +1241,19 @@ int __init construct_dom0(struct domain 
        if (0 != (elf_xen_parse(&elf, &parms)))
                return rc;
 
+       /*
+        * We cannot rely on the load address in the ELF headers to
+        * determine the meta physical address at which the image
+        * is loaded.  Patch the address to match the real one, based
+        * on xen_pstart
+        */
+       phys_load_offset = xen_pstart - elf.pstart;
+       elf.pstart += phys_load_offset;
+       elf.pend += phys_load_offset;
+       parms.virt_kstart += phys_load_offset;
+       parms.virt_kend += phys_load_offset;
+       parms.virt_entry += phys_load_offset;
+
        printk(" Dom0 kernel: %s, %s, paddr 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
               elf_64bit(&elf) ? "64-bit" : "32-bit",
               elf_msb(&elf)   ? "msb"    : "lsb",
@@ -1268,8 +1284,10 @@ int __init construct_dom0(struct domain 
            /* The next page aligned boundary after the start info.
               Note: EFI_PAGE_SHIFT = 12 <= PAGE_SHIFT */
            pinitrd_start = pstart_info + PAGE_SIZE;
-           if (pinitrd_start + initrd_len >= dom0_size)
+
+           if ((pinitrd_start + initrd_len - phys_load_offset) >= dom0_size)
                    panic("%s: not enough memory assigned to dom0", __func__);
+
            for (offset = 0; offset < initrd_len; offset += PAGE_SIZE) {
                struct page_info *p;
                p = assign_new_domain_page(d, pinitrd_start + offset);
@@ -1322,7 +1340,7 @@ int __init construct_dom0(struct domain 
                panic("Cannot allocate dom0 vcpu %d\n", i);
 
        /* Copy the OS image. */
-       loaddomainelfimage(d,&elf);
+       loaddomainelfimage(d, &elf, phys_load_offset);
 
        BUILD_BUG_ON(sizeof(start_info_t) + sizeof(dom0_vga_console_info_t) +
                     sizeof(struct ia64_boot_param) > PAGE_SIZE);

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