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| author | Helge Deller <deller@gmx.de> | 2023-11-07 14:33:32 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2023-11-07 19:48:30 +0100 |
| commit | 166b0110d1ee53290bd11618df6e3991c117495a (patch) | |
| tree | 57fceacd043b94ec76e775d41adfb66828f94809 | |
| parent | be3ca57cfb777ad820c6659d52e60bbdd36bf5ff (diff) | |
| download | lwn-166b0110d1ee53290bd11618df6e3991c117495a.tar.gz lwn-166b0110d1ee53290bd11618df6e3991c117495a.zip | |
parisc/pgtable: Do not drop upper 5 address bits of physical address
When calculating the pfn for the iitlbt/idtlbt instruction, do not
drop the upper 5 address bits. This doesn't seem to have an effect
on physical hardware which uses less physical address bits, but in
qemu the missing bits are visible.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
| -rw-r--r-- | arch/parisc/kernel/entry.S | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index cab1ec23e0d7..ab23e61a6f01 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -475,13 +475,13 @@ * to a CPU TLB 4k PFN (4k => 12 bits to shift) */ #define PAGE_ADD_SHIFT (PAGE_SHIFT-12) #define PAGE_ADD_HUGE_SHIFT (REAL_HPAGE_SHIFT-12) + #define PFN_START_BIT (63-ASM_PFN_PTE_SHIFT+(63-58)-PAGE_ADD_SHIFT) /* Drop prot bits and convert to page addr for iitlbt and idtlbt */ .macro convert_for_tlb_insert20 pte,tmp #ifdef CONFIG_HUGETLB_PAGE copy \pte,\tmp - extrd,u \tmp,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\ - 64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte + extrd,u \tmp,PFN_START_BIT,PFN_START_BIT+1,\pte depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\ (63-58)+PAGE_ADD_SHIFT,\pte @@ -489,8 +489,7 @@ depdi _HUGE_PAGE_SIZE_ENCODING_DEFAULT,63,\ (63-58)+PAGE_ADD_HUGE_SHIFT,\pte #else /* Huge pages disabled */ - extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\ - 64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte + extrd,u \pte,PFN_START_BIT,PFN_START_BIT+1,\pte depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\ (63-58)+PAGE_ADD_SHIFT,\pte #endif |