This is a note to let you know that I've just added the patch titled
powerpc/fsl: Fix the flush of branch predictor.
to the 4.19-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:
powerpc-fsl-fix-the-flush-of-branch-predictor.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From foo@baz Fri Mar 29 16:04:51 CET 2019
From: Michael Ellerman <[email protected]>
Date: Fri, 29 Mar 2019 22:26:19 +1100
Subject: powerpc/fsl: Fix the flush of branch predictor.
To: [email protected], [email protected]
Cc: [email protected], [email protected], [email protected],
[email protected]
Message-ID: <[email protected]>
From: Christophe Leroy <[email protected]>
commit 27da80719ef132cf8c80eb406d5aeb37dddf78cc upstream.
The commit identified below adds MC_BTB_FLUSH macro only when
CONFIG_PPC_FSL_BOOK3E is defined. This results in the following error
on some configs (seen several times with kisskb randconfig_defconfig)
arch/powerpc/kernel/exceptions-64e.S:576: Error: Unrecognized opcode:
`mc_btb_flush'
make[3]: *** [scripts/Makefile.build:367: arch/powerpc/kernel/exceptions-64e.o]
Error 1
make[2]: *** [scripts/Makefile.build:492: arch/powerpc/kernel] Error 2
make[1]: *** [Makefile:1043: arch/powerpc] Error 2
make: *** [Makefile:152: sub-make] Error 2
This patch adds a blank definition of MC_BTB_FLUSH for other cases.
Fixes: 10c5e83afd4a ("powerpc/fsl: Flush the branch predictor at each kernel
entry (64bit)")
Cc: Diana Craciun <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
Reviewed-by: Daniel Axtens <[email protected]>
Reviewed-by: Diana Craciun <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/powerpc/kernel/exceptions-64e.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -349,6 +349,7 @@ ret_from_mc_except:
#define GEN_BTB_FLUSH
#define CRIT_BTB_FLUSH
#define DBG_BTB_FLUSH
+#define MC_BTB_FLUSH
#define GDBELL_BTB_FLUSH
#endif
Patches currently in stable-queue which might be from [email protected] are
queue-4.19/powerpc-fsl-emulate-sprn_bucsr-register.patch
queue-4.19/powerpc-fsl-flush-the-branch-predictor-at-each-kernel-entry-64bit.patch
queue-4.19/powerpc-fsl-update-spectre-v2-reporting.patch
queue-4.19/powerpc-fsl-add-macro-to-flush-the-branch-predictor.patch
queue-4.19/powerpc-security-fix-spectre_v2-reporting.patch
queue-4.19/powerpc-fsl-fix-the-flush-of-branch-predictor.patch
queue-4.19/powerpc-fsl-enable-runtime-patching-if-nospectre_v2-boot-arg-is-used.patch
queue-4.19/powerpc-fsl-fixed-warning-orphan-section-__btb_flush_fixup.patch
queue-4.19/powerpc-fsl-add-nospectre_v2-command-line-argument.patch
queue-4.19/powerpc-fsl-add-infrastructure-to-fixup-branch-predictor-flush.patch
queue-4.19/powerpc-fsl-flush-the-branch-predictor-at-each-kernel-entry-32-bit.patch
queue-4.19/powerpc-fsl-flush-branch-predictor-when-entering-kvm.patch
