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authorAlexey Kardashevskiy <aik@ozlabs.ru>2018-02-01 16:09:44 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2018-02-13 22:37:47 +1100
commit62e984ddfd6b056d399e24113f5e6a7145e579d8 (patch)
tree96b59e03b4875886bff664533fc3cc32897b291c /arch/powerpc
parentb00b62898631b756c3e123542bbb0487aa343dd9 (diff)
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: 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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/pgtable_64.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index c9a623c2d8a2..d75dd5273d15 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -471,6 +471,8 @@ void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0,
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) : :