x86/speculation/l1tf: Fix up pte->pfn conversion for PAE

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Jan has noticed that pte_pfn and co. resp. pfn_pte are incorrect for
CONFIG_PAE because phys_addr_t is wider than unsigned long and so the
pte_val reps. shift left would get truncated. Fix this up by using proper
types.

Fixes: 6b28baca9b ("x86/speculation/l1tf: Protect PROT_NONE PTEs against speculation")
Reported-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Vlastimil Babka <vbabka@suse.cz>

...

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Michal Hocko 2018-06-27 17:46:50 +02:00 • committed by Thomas Gleixner

parent 0d0f624905

commit e14d7dfb41

1 changed files with 6 additions and 6 deletions

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arch/x86/include/asm/pgtable.h

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