Commit 16ed1416 authored by Paul Mackerras's avatar Paul Mackerras Committed by Michael Ellerman

powerpc/64: Make type of partition table flush depend on partition type

When changing a partition table entry on POWER9, we do a particular
form of the tlbie instruction which flushes all TLBs and caches of
the partition table for a given logical partition ID (LPID).
This instruction has a field in the instruction word, labelled R
(radix), which should be 1 if the partition was previously a radix
partition and 0 if it was a HPT partition.  This implements that
logic.
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent ba9b399a
...@@ -454,13 +454,23 @@ void __init mmu_partition_table_init(void) ...@@ -454,13 +454,23 @@ void __init mmu_partition_table_init(void)
void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0, void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0,
unsigned long dw1) unsigned long dw1)
{ {
unsigned long old = be64_to_cpu(partition_tb[lpid].patb0);
partition_tb[lpid].patb0 = cpu_to_be64(dw0); partition_tb[lpid].patb0 = cpu_to_be64(dw0);
partition_tb[lpid].patb1 = cpu_to_be64(dw1); partition_tb[lpid].patb1 = cpu_to_be64(dw1);
/* Global flush of TLBs and partition table caches for this lpid */ /*
* Global flush of TLBs and partition table caches for this lpid.
* The type of flush (hash or radix) depends on what the previous
* use of this partition ID was, not the new use.
*/
asm volatile("ptesync" : : : "memory"); asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : : if (old & PATB_HR)
"r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
else
asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
asm volatile("eieio; tlbsync; ptesync" : : : "memory"); asm volatile("eieio; tlbsync; ptesync" : : : "memory");
} }
EXPORT_SYMBOL_GPL(mmu_partition_table_set_entry); EXPORT_SYMBOL_GPL(mmu_partition_table_set_entry);
......
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