It turns out that the note in c/s a8d27a54cc9cc
Finally, leave a linker assert covering the fact that plenty of code blindly
assumes that Xen is less that 16M. This wants fixing in due course.
was easier to address than I had originally anticipated. This series does so.
The end result can be tested by trying to boot with:
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 759827a19a..fa83a9a28f 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -52,6 +52,8 @@
#include <asm/spec_ctrl.h>
#include <asm/guest.h>
+static uint8_t __used big_data[MB(16)] = { 42, };
+
/* opt_nosmp: If true, secondary processors are ignored. */
static bool __initdata opt_nosmp;
boolean_param("nosmp", opt_nosmp);
Before this series, Xen will triple fault in one of several places (first and
most obviously, __high_start on the first stack access, as cpu0_stack[] is
very near the end of Xen's linked image).
Andrew Cooper (4):
x86/boot: Rename l?_identmap to l?_directmap
x86/page: Remove bifurcated PAGE_HYPERVISOR constant
x86/boot: Create the l2_xenmap[] mappings dynamically
x86/boot: Size the boot/directmap mappings dynamically
xen/arch/x86/boot/head.S | 35 +++++++++++++++++++++-------
xen/arch/x86/boot/x86_64.S | 49 +++++++++++++++++----------------------
xen/arch/x86/efi/efi-boot.h | 43 +++++++++++++++++++++++++++-------
xen/arch/x86/setup.c | 6 ++---
xen/arch/x86/xen.lds.S | 6 ++---
xen/include/asm-x86/page.h | 2 +-
xen/include/asm-x86/x86_64/page.h | 7 ------
7 files changed, 90 insertions(+), 58 deletions(-)
--
2.11.0
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