From c34e604bf6b887bed8b2788d42e756151d912fa9 Mon Sep 17 00:00:00 2001 From: Alexander Bulekov Date: Sat, 6 May 2023 07:21:45 -0400 Subject: loongarch: mark loongarch_ipi_iocsr re-entrnacy safe loongarch_ipi_iocsr MRs rely on re-entrant IO through the ipi_send function. As such, mark these MRs re-entrancy-safe. Fixes: a2e1753b80 ("memory: prevent dma-reentracy issues") Signed-off-by: Alexander Bulekov Reviewed-by: Song Gao Message-Id: <20230506112145.3563708-1-alxndr@bu.edu> Signed-off-by: Song Gao (cherry picked from commit 6d0589e0e6c64b888864a2bf980537be20389264) Signed-off-by: Michael Tokarev --- hw/intc/loongarch_ipi.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'hw/intc') diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c index aa4bf9eb74..40e98af2ce 100644 --- a/hw/intc/loongarch_ipi.c +++ b/hw/intc/loongarch_ipi.c @@ -215,6 +215,10 @@ static void loongarch_ipi_init(Object *obj) for (cpu = 0; cpu < MAX_IPI_CORE_NUM; cpu++) { memory_region_init_io(&s->ipi_iocsr_mem[cpu], obj, &loongarch_ipi_ops, &lams->ipi_core[cpu], "loongarch_ipi_iocsr", 0x48); + + /* loongarch_ipi_iocsr performs re-entrant IO through ipi_send */ + s->ipi_iocsr_mem[cpu].disable_reentrancy_guard = true; + sysbus_init_mmio(sbd, &s->ipi_iocsr_mem[cpu]); memory_region_init_io(&s->ipi64_iocsr_mem[cpu], obj, &loongarch_ipi64_ops, -- cgit v1.2.3