On Tue, 2018-08-14 at 19:18 +0200, Greg Kroah-Hartman wrote:
4.4-stable review patch. If anyone has any objections, please let me know.
From: Andi Kleen ak@linux.intel.com
commit 958f79b9ee55dfaf00c8106ed1c22a2919e0028b upstream
[...]
--- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -378,12 +378,39 @@ static inline pmd_t pfn_pmd(unsigned lon
return __pmd(pfn | massage_pgprot(pgprot));
} +static inline pud_t pfn_pud(unsigned long page_nr, pgprot_t pgprot) +{
- phys_addr_t pfn = page_nr << PAGE_SHIFT;
- pfn ^= protnone_mask(pgprot_val(pgprot));
- pfn &= PHYSICAL_PUD_PAGE_MASK;
- return __pud(pfn | massage_pgprot(pgprot));
+}
[...]
This (and the backport to 4.9) are missing the fix from commit e14d7dfb41f5 "x86/speculation/l1tf: Fix up pte->pfn conversion for PAE", as that was applied earlier in the series. But since PAE implies only 3-level paging I don't know how the PUD functions get used or whether this actually matters.
Ben.