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Commit e69b5d30 authored by Juergen Gross's avatar Juergen Gross
Browse files

xen: remove global bit from __default_kernel_pte_mask for pv guests 



When removing the global bit from __supported_pte_mask do the same for
__default_kernel_pte_mask in order to avoid the WARN_ONCE() in
check_pgprot() when setting a kernel pte before having called
init_mem_mapping().

Cc: <stable@vger.kernel.org> # 4.17
Reported-by: default avatarMichael Young <m.a.young@durham.ac.uk>
Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
parent eef04c7b

arch/x86/xen/enlighten_pv.c

+1 −0
Original line number Diff line number Diff line
@@ -1229,6 +1229,7 @@ asmlinkage __visible void __init xen_start_kernel(void) 


	/* Prevent unwanted bits from being set in PTEs. */

	__supported_pte_mask &= ~_PAGE_GLOBAL;

	__default_kernel_pte_mask &= ~_PAGE_GLOBAL;



	/*

	 * Prevent page tables from being allocated in highmem, even