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parisc: Fix itlb miss handler for 64-bit programs

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For an itlb miss when executing code above 4 Gb on ILP64 adjust the
iasq/iaoq in the same way isr/ior was adjusted.  This fixes signal
delivery for the 64-bit static test program from
http://ftp.parisc-linux.org/src/64bit.tar.gz.  Note that signals are
handled by the signal trampoline code in the 64-bit VDSO which is mapped
into high userspace memory region above 4GB for 64-bit processes.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org	# v4.19+
This commit is contained in:
Helge Deller 2024-09-10 18:32:24 +02:00
parent d24449864d
commit 9542130937
1 changed files with 2 additions and 4 deletions
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6
arch/parisc/kernel/entry.S
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@ -1051,8 +1051,7 @@ ENTRY_CFI(intr_save) /* for os_hpmc */
STREG %r16, PT_ISR(%r29)
STREG %r17, PT_IOR(%r29)
#if 0 && defined(CONFIG_64BIT)
/* Revisit when we have 64-bit code above 4Gb */
#if defined(CONFIG_64BIT)
b,n intr_save2
skip_save_ior:
@ -1060,8 +1059,7 @@ skip_save_ior:
* need to adjust iasq/iaoq here in the same way we adjusted isr/ior
* above.
*/
extrd,u,* %r8,PSW_W_BIT,1,%r1
cmpib,COND(=),n 1,%r1,intr_save2
bb,COND(>=),n %r8,PSW_W_BIT,intr_save2
LDREG PT_IASQ0(%r29), %r16
LDREG PT_IAOQ0(%r29), %r17
/* adjust iasq/iaoq */