This is a note to let you know that I've just added the patch titled
powerpc/mm: Flush radix process translations when setting MMU type
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: powerpc-mm-flush-radix-process-translations-when-setting-mmu-type.patch and it can be found in the queue-4.15 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 62e984ddfd6b056d399e24113f5e6a7145e579d8 Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy aik@ozlabs.ru Date: Thu, 1 Feb 2018 16:09:44 +1100 Subject: powerpc/mm: Flush radix process translations when setting MMU type
From: Alexey Kardashevskiy aik@ozlabs.ru
commit 62e984ddfd6b056d399e24113f5e6a7145e579d8 upstream.
Radix guests do normally invalidate process-scoped translations when a new pid is allocated but migrated guests do not invalidate these so migrated guests crash sometime, especially easy to reproduce with migration happening within first 10 seconds after the guest boot start on the same machine.
This adds the "Invalidate process-scoped translations" flush to fix radix guests migration.
Fixes: 2ee13be34b13 ("KVM: PPC: Book3S HV: Update kvmppc_set_arch_compat() for ISA v3.00") Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: Alexey Kardashevskiy aik@ozlabs.ru Tested-by: Laurent Vivier lvivier@redhat.com Tested-by: Daniel Henrique Barboza danielhb@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/powerpc/mm/pgtable_64.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -483,6 +483,8 @@ void mmu_partition_table_set_entry(unsig if (old & PATB_HR) { asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : : "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); + asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : : + "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); trace_tlbie(lpid, 0, TLBIEL_INVAL_SET_LPID, lpid, 2, 0, 1); } else { asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : :
Patches currently in stable-queue which might be from aik@ozlabs.ru are
queue-4.15/powerpc-mm-flush-radix-process-translations-when-setting-mmu-type.patch