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authorJuergen Gross <jgross@suse.com>2018-07-02 12:00:18 +0200
committerJuergen Gross <jgross@suse.com>2018-07-12 11:57:57 +0200
commite69b5d308da72cbf4e7911c3979f9a46d28532af (patch)
treee3c7922a3b1b6bbd9263dce4ff3ec5a07554d1f5
parenteef04c7b3786ff0c9cb1019278b6c6c2ea0ad4ff (diff)
downloadlinux-e69b5d308da72cbf4e7911c3979f9a46d28532af.tar.bz2
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: Michael Young <m.a.young@durham.ac.uk> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
-rw-r--r--arch/x86/xen/enlighten_pv.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 8d4e2e1ae60b..4816b6f82a9a 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -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