Commit 958f79b9 authored by Andi Kleen's avatar Andi Kleen Committed by Thomas Gleixner
Browse files

x86/mm/pat: Make set_memory_np() L1TF safe

set_memory_np() is used to mark kernel mappings not present, but it has
it's own open coded mechanism which does not have the L1TF protection of
inverting the address bits.

Replace the open coded PTE manipulation with the L1TF protecting low level
PTE routines.

Passes the CPA self test.
Signed-off-by: default avatarAndi Kleen <>
Signed-off-by: default avatarThomas Gleixner <>
parent 0768f915
......@@ -1014,8 +1014,8 @@ static long populate_pmd(struct cpa_data *cpa,
pmd = pmd_offset(pud, start);
set_pmd(pmd, __pmd(cpa->pfn << PAGE_SHIFT | _PAGE_PSE |
set_pmd(pmd, pmd_mkhuge(pfn_pmd(cpa->pfn,
start += PMD_SIZE;
cpa->pfn += PMD_SIZE >> PAGE_SHIFT;
......@@ -1087,8 +1087,8 @@ static int populate_pud(struct cpa_data *cpa, unsigned long start, p4d_t *p4d,
* Map everything starting from the Gb boundary, possibly with 1G pages
while (boot_cpu_has(X86_FEATURE_GBPAGES) && end - start >= PUD_SIZE) {
set_pud(pud, __pud(cpa->pfn << PAGE_SHIFT | _PAGE_PSE |
set_pud(pud, pud_mkhuge(pfn_pud(cpa->pfn,
start += PUD_SIZE;
cpa->pfn += PUD_SIZE >> PAGE_SHIFT;
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