diff options
author | Juergen Gross <jgross@suse.com> | 2018-08-20 17:24:20 +0200 |
---|---|---|
committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2018-08-20 14:46:26 -0400 |
commit | 75f2d3a0cef5cd8cd41772c9f8ada37dee9c9369 (patch) | |
tree | 89b3a7fa08753ecdf14490cf955152af3fe7d78f /drivers/acpi | |
parent | 00f53f758d9baffef9dc3efedf534bb0dc1872eb (diff) |
x86/xen: enable early use of set_fixmap in 32-bit Xen PV guest
Commit 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in
init_hypervisor_platform()") moved the mapping of the shared info area
before pagetable_init(). This breaks booting as 32-bit PV guest as the
use of set_fixmap isn't possible at this time on 32-bit.
This can be worked around by populating the needed PMD on 32-bit
kernel earlier.
In order not to reimplement populate_extra_pte() using extend_brk()
for allocating new page tables extend alloc_low_pages() to do that in
case the early page table pool is not yet available.
Fixes: 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in init_hypervisor_platform()")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/acpi')
0 files changed, 0 insertions, 0 deletions