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powerpc/mm: Flush radix process translations when setting MMU type 

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: 2ee13be34b ("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>
This commit is contained in:
Alexey Kardashevskiy 2018-02-01 16:09:44 +11:00 committed by Michael Ellerman
parent b00b628986
commit 62e984ddfd
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/mm/pgtable_64.c
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@ -471,6 +471,8 @@ void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0,
if (old & PATB_HR) { if (old & PATB_HR) {
asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : : asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); "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); trace_tlbie(lpid, 0, TLBIEL_INVAL_SET_LPID, lpid, 2, 0, 1);
} else { } else {
asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : : asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : :