diff mbox series

[1/2] parisc: Fix itlb miss handler for 64-bit programs

Message ID 20240910170000.63672-1-deller@kernel.org (mailing list archive)
State Accepted, archived
Headers show
Series [1/2] parisc: Fix itlb miss handler for 64-bit programs | expand

Commit Message

Helge Deller Sept. 10, 2024, 4:59 p.m. UTC 
From: Helge Deller <deller@gmx.de>

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	# v6.0+
---
 arch/parisc/kernel/entry.S | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index ab23e61a6f01..838c27f93302 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -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:
@@ -1061,7 +1060,7 @@  skip_save_ior:
 	 * above.
 	 */
 	extrd,u,*	%r8,PSW_W_BIT,1,%r1
-	cmpib,COND(=),n	1,%r1,intr_save2
+	cmpib,COND(=),n	0,%r1,intr_save2
 	LDREG		PT_IASQ0(%r29), %r16
 	LDREG		PT_IAOQ0(%r29), %r17
 	/* adjust iasq/iaoq */