path: root/arch/x86/include
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authorJuergen Gross <jgross@suse.com>2018-08-20 17:24:20 +0200
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2018-08-20 14:46:26 -0400
commit75f2d3a0cef5cd8cd41772c9f8ada37dee9c9369 (patch)
tree89b3a7fa08753ecdf14490cf955152af3fe7d78f /arch/x86/include
parent00f53f758d9baffef9dc3efedf534bb0dc1872eb (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 'arch/x86/include')
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