This is a note to let you know that I've just added the patch titled
powerpc/rfi-flush: Always enable fallback flush on pseries
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:
powerpc-rfi-flush-always-enable-fallback-flush-on-pseries.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 <[email protected]> know about it.
>From foo@baz Sun May 27 15:47:18 CEST 2018
From: Michael Ellerman <[email protected]>
Date: Sat, 26 May 2018 14:27:32 +1000
Subject: powerpc/rfi-flush: Always enable fallback flush on pseries
To: [email protected]
Cc: [email protected], [email protected], [email protected]
Message-ID: <[email protected]>
From: Michael Ellerman <[email protected]>
commit 84749a58b6e382f109abf1e734bc4dd43c2c25bb upstream.
This ensures the fallback flush area is always allocated on pseries,
so in case a LPAR is migrated from a patched to an unpatched system,
it is possible to enable the fallback flush in the target system.
Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Mauricio Faria de Oliveira <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/powerpc/platforms/pseries/setup.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -468,26 +468,18 @@ static void pseries_setup_rfi_flush(void
/* Enable by default */
enable = true;
+ types = L1D_FLUSH_FALLBACK;
rc = plpar_get_cpu_characteristics(&result);
if (rc == H_SUCCESS) {
- types = L1D_FLUSH_NONE;
-
if (result.character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
types |= L1D_FLUSH_MTTRIG;
if (result.character & H_CPU_CHAR_L1D_FLUSH_ORI30)
types |= L1D_FLUSH_ORI;
- /* Use fallback if nothing set in hcall */
- if (types == L1D_FLUSH_NONE)
- types = L1D_FLUSH_FALLBACK;
-
if ((!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) ||
(!(result.behaviour & H_CPU_BEHAV_FAVOUR_SECURITY)))
enable = false;
- } else {
- /* Default to fallback if case hcall is not available */
- types = L1D_FLUSH_FALLBACK;
}
setup_rfi_flush(types, enable);
Patches currently in stable-queue which might be from [email protected] are
queue-4.14/powerpc-64s-clear-pcr-on-boot.patch
queue-4.14/powerpc-rfi-flush-differentiate-enabled-and-patched-flush-types.patch
queue-4.14/powerpc-64s-fix-section-mismatch-warnings-from-setup_rfi_flush.patch
queue-4.14/powerpc-pseries-fix-clearing-of-security-feature-flags.patch
queue-4.14/powerpc-powernv-set-or-clear-security-feature-flags.patch
queue-4.14/powerpc-64s-move-cpu_show_meltdown.patch
queue-4.14/powerpc-rfi-flush-call-setup_rfi_flush-after-lpm-migration.patch
queue-4.14/powerpc-pseries-set-or-clear-security-feature-flags.patch
queue-4.14/powerpc-rfi-flush-make-it-possible-to-call-setup_rfi_flush-again.patch
queue-4.14/powerpc-move-default-security-feature-flags.patch
queue-4.14/powerpc-powernv-use-the-security-flags-in-pnv_setup_rfi_flush.patch
queue-4.14/powerpc-add-security-feature-flags-for-spectre-meltdown.patch
queue-4.14/powerpc-pseries-use-the-security-flags-in-pseries_setup_rfi_flush.patch
queue-4.14/powerpc-64s-enhance-the-information-in-cpu_show_meltdown.patch
queue-4.14/powerpc-64s-improve-rfi-l1-d-cache-flush-fallback.patch
queue-4.14/powerpc-rfi-flush-always-enable-fallback-flush-on-pseries.patch
queue-4.14/powerpc-rfi-flush-move-the-logic-to-avoid-a-redo-into-the-debugfs-code.patch
queue-4.14/powerpc-pseries-restore-default-security-feature-flags-on-setup.patch
queue-4.14/powerpc-pseries-add-new-h_get_cpu_characteristics-flags.patch
queue-4.14/powerpc-64s-add-support-for-a-store-forwarding-barrier-at-kernel-entry-exit.patch
queue-4.14/powerpc-64s-wire-up-cpu_show_spectre_v1.patch
queue-4.14/powerpc-powernv-support-firmware-disable-of-rfi-flush.patch
queue-4.14/powerpc-pseries-support-firmware-disable-of-rfi-flush.patch
queue-4.14/powerpc-64s-wire-up-cpu_show_spectre_v2.patch
