This is a note to let you know that I've just added the patch titled
parisc/pgtable: Do not drop upper 5 address bits of physical address
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-pgtable-do-not-drop-upper-5-address-bits-of-physical-address.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 166b0110d1ee53290bd11618df6e3991c117495a Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Tue, 7 Nov 2023 14:33:32 +0100
Subject: parisc/pgtable: Do not drop upper 5 address bits of physical address
From: Helge Deller <deller@xxxxxx>
commit 166b0110d1ee53290bd11618df6e3991c117495a upstream.
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@xxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/entry.S | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -521,13 +521,13 @@
* 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
@@ -535,8 +535,7 @@
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
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-4.14/parisc-power-fix-power-soft-off-when-running-on-qemu.patch
queue-4.14/parisc-power-add-power-soft-off-when-running-on-qemu.patch
queue-4.14/parisc-pgtable-do-not-drop-upper-5-address-bits-of-physical-address.patch
queue-4.14/parisc-prevent-booting-64-bit-kernels-on-pa1.x-machines.patch
