[RFC PATCH kernel] powerpc/mm: Flush "process-scoped translations" when setting MMU type
From: Alexey Kardashevskiy <hidden>
Date: 2018-01-09 01:35:51
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
This fixes migration on POWER9 machines, especially when migration starts within first 10 seconds after the guest start. Signed-off-by: Alexey Kardashevskiy <redacted> --- This is a reminder that the problem exists, a proper patch and commit log are still needed. The "(old & PATB_HR)" was tested but not the other one, something is wrong with hpt guest on radix host. --- arch/powerpc/mm/pgtable_64.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 813ea22..f690f6d 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c@@ -483,10 +483,14 @@ 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) : : "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); + asm volatile(PPC_TLBIE_5(%0,%1,2,1,0) : : + "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); trace_tlbie(lpid, 0, TLBIEL_INVAL_SET_LPID, lpid, 2, 0, 0); } asm volatile("eieio; tlbsync; ptesync" : : : "memory");
--
2.11.0