Patch "powerpc: Fix action argument for cpufeatures-based TLB flush" has been added to the 4.13-stable tree

Patch "powerpc: Fix action argument for cpufeatures-based TLB flush" has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    powerpc: Fix action argument for cpufeatures-based TLB flush

to the 4.13-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-fix-action-argument-for-cpufeatures-based-tlb-flush.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3b7af5c0fd9631762d1c4d7b4cee76f571dd3c2c Mon Sep 17 00:00:00 2001
From: Jeremy Kerr <jk@ozlabs.org>
Date: Wed, 27 Sep 2017 12:55:51 +0800
Subject: powerpc: Fix action argument for cpufeatures-based TLB flush

From: Jeremy Kerr <jk@ozlabs.org>

commit 3b7af5c0fd9631762d1c4d7b4cee76f571dd3c2c upstream.

Commit 41d0c2ecde19 ("powerpc/powernv: Fix local TLB flush for boot
and MCE on POWER9") introduced calls to __flush_tlb_power[89] from the
cpufeatures code, specifying the number of sets to flush.

However, these functions take an action argument, not a number of
sets. This means we hit the BUG() in __flush_tlb_{206,300} when using
cpufeatures-style configuration.

This change passes TLB_INVAL_SCOPE_GLOBAL instead.

Fixes: 41d0c2ecde19 ("powerpc/powernv: Fix local TLB flush for boot and MCE on POWER9")
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/kernel/dt_cpu_ftrs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -102,10 +102,10 @@ static void cpufeatures_flush_tlb(void)
 	case PVR_POWER8:
 	case PVR_POWER8E:
 	case PVR_POWER8NVL:
-		__flush_tlb_power8(POWER8_TLB_SETS);
+		__flush_tlb_power8(TLB_INVAL_SCOPE_GLOBAL);
 		break;
 	case PVR_POWER9:
-		__flush_tlb_power9(POWER9_TLB_SETS_HASH);
+		__flush_tlb_power9(TLB_INVAL_SCOPE_GLOBAL);
 		break;
 	default:
 		pr_err("unknown CPU version for boot TLB flush\n");


Patches currently in stable-queue which might be from jk@ozlabs.org are

queue-4.13/powerpc-fix-action-argument-for-cpufeatures-based-tlb-flush.patch