Commit 330e5973 authored by Andi Kleen's avatar Andi Kleen Committed by Greg Kroah-Hartman
Browse files

x86/speculation/l1tf: Invert all not present mappings

commit f22cc87f

 upstream.

For kernel mappings PAGE_PROTNONE is not necessarily set for a non present
mapping, but the inversion logic explicitely checks for !PRESENT and
PROT_NONE.

Remove the PROT_NONE check and make the inversion unconditional for all not
present mappings.
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4d3579f7
......@@ -6,7 +6,7 @@
static inline bool __pte_needs_invert(u64 val)
{
return (val & (_PAGE_PRESENT|_PAGE_PROTNONE)) == _PAGE_PROTNONE;
return !(val & _PAGE_PRESENT);
}
/* Get a mask to xor with the page table entry to get the correct pfn. */
......
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