mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
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: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
0768f91530
commit
958f79b9ee
@ -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 |
|
||||
massage_pgprot(pmd_pgprot)));
|
||||
set_pmd(pmd, pmd_mkhuge(pfn_pmd(cpa->pfn,
|
||||
canon_pgprot(pmd_pgprot))));
|
||||
|
||||
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 |
|
||||
massage_pgprot(pud_pgprot)));
|
||||
set_pud(pud, pud_mkhuge(pfn_pud(cpa->pfn,
|
||||
canon_pgprot(pud_pgprot))));
|
||||
|
||||
start += PUD_SIZE;
|
||||
cpa->pfn += PUD_SIZE >> PAGE_SHIFT;
|
||||
|
Loading…
Reference in New Issue
Block a user