# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID 80e2c1b3f9b1911077407db98c342ff7e6b0f35e
# Parent a4ab169ee85042e9ced6ae13a459da13f4517d19
[powerpc] domain building fixes for linux kexec model
The following updates are included:
- No stack allocation is necessary
- Some buggy kernels require r13 to be zeroed
- the DTB must be loaded from a fixed address, we are using
"/root/DomU.dtb" until we have the tools build the DTB on their
own.
- Though we give the PFN of the store and console pages to the new
domain we must make sure the MFN is given to the tools.
Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
tools/libxc/xc_ppc_linux_build.c | 14 ++++++++++----
1 files changed, 10 insertions(+), 4 deletions(-)
diff -r a4ab169ee850 -r 80e2c1b3f9b1 tools/libxc/xc_ppc_linux_build.c
--- a/tools/libxc/xc_ppc_linux_build.c Thu Jul 13 11:26:51 2006 -0400
+++ b/tools/libxc/xc_ppc_linux_build.c Wed Jul 26 14:24:09 2006 -0400
@@ -106,10 +106,13 @@ static int init_boot_vcpu(
memset(&ctxt.user_regs, 0x55, sizeof(ctxt.user_regs));
ctxt.user_regs.pc = dsi->v_kernentry;
ctxt.user_regs.msr = 0;
- ctxt.user_regs.gprs[1] = 32<<20; /* XXX arbitrary stack address */
+ ctxt.user_regs.gprs[1] = 0; /* Linux uses its own stack */
ctxt.user_regs.gprs[3] = dtb;
ctxt.user_regs.gprs[4] = kaddr;
ctxt.user_regs.gprs[5] = 0;
+ /* There is a buggy kernel that does not zero the "local_paca", so
+ * we must make sure this register is 0 */
+ ctxt.user_regs.gprs[13] = 0;
VERBOSE(printf("xc_vcpu_setvcpucontext:\n"
" pc 0x%"PRIx64", msr 0x016%"PRIx64"\n"
@@ -343,6 +346,8 @@ static int get_page_array(int xc_handle,
return 0;
}
+
+
int xc_linux_build(int xc_handle,
uint32_t domid,
const char *image_name,
@@ -385,13 +390,14 @@ int xc_linux_build(int xc_handle,
/* XXX install initrd addr/len into device tree */
dtb_addr = (16 << 20);
- if (load_dtb(xc_handle, domid, "DomU.dtb", dtb_addr, &dsi, page_array)) {
+ if (load_dtb(xc_handle, domid, "/root/DomU.dtb", dtb_addr, &dsi,
page_array)) {
dtb_addr = 0;
}
si_addr = create_start_info(&si, store_evtchn, console_evtchn);
- *console_mfn = si.console_mfn;
- *store_mfn = si.store_mfn;
+ *console_mfn = page_array[si.console_mfn];
+ *store_mfn = page_array[si.store_mfn];
+
if (install_image(xc_handle, domid, page_array, &si, si_addr,
sizeof(start_info_t))) {
rc = -1;
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