Commit a67004a3 authored by Frederic Barrat's avatar Frederic Barrat Committed by Greg Kroah-Hartman

powerpc/mm: Add missing global TLB invalidate if cxl is active

commit 88b1bf72 upstream.

Commit 4c6d9acc ("powerpc/mm: Add hooks for cxl") converted local
TLB invalidates to global if the cxl driver is active. This is necessary
because the CAPP snoops invalidations to forward them to the PSL on the
cxl adapter. However one path was forgotten. native_flush_hash_range()
still does local TLB invalidates, as found out the hard way recently.

This patch fixes it by following the same logic as previously: if the
cxl driver is active, the local TLB invalidates are 'upgraded' to
global.

Fixes: 4c6d9acc ("powerpc/mm: Add hooks for cxl")
Signed-off-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 435cc436
......@@ -645,6 +645,10 @@ static void native_flush_hash_range(unsigned long number, int local)
unsigned long psize = batch->psize;
int ssize = batch->ssize;
int i;
unsigned int use_local;
use_local = local && mmu_has_feature(MMU_FTR_TLBIEL) &&
mmu_psize_defs[psize].tlbiel && !cxl_ctx_in_use();
local_irq_save(flags);
......@@ -671,8 +675,7 @@ static void native_flush_hash_range(unsigned long number, int local)
} pte_iterate_hashed_end();
}
if (mmu_has_feature(MMU_FTR_TLBIEL) &&
mmu_psize_defs[psize].tlbiel && local) {
if (use_local) {
asm volatile("ptesync":::"memory");
for (i = 0; i < number; i++) {
vpn = batch->vpn[i];
......
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