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pnv_lpc: disable reentrancy detection for lpc-hc 

As lpc-hc is designed for re-entrant calls from xscom, mark it
re-entrancy safe.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
[clg: mark opb_master_regs as re-entrancy safe also ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230526073850.2772197-1-clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
(cherry picked from commit 76f9ebffcd)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Alexander Bulekov 2023-05-26 09:38:50 +02:00 committed by Michael Tokarev
parent c34e604bf6
commit bf202262e5
1 changed files with 3 additions and 0 deletions
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3
hw/ppc/pnv_lpc.c
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@ -733,10 +733,13 @@ static void pnv_lpc_realize(DeviceState *dev, Error **errp)
/* Create MMIO regions for LPC HC and OPB registers */
memory_region_init_io(&lpc->opb_master_regs, OBJECT(dev), &opb_master_ops,
lpc, "lpc-opb-master", LPC_OPB_REGS_OPB_SIZE);
lpc->opb_master_regs.disable_reentrancy_guard = true;
memory_region_add_subregion(&lpc->opb_mr, LPC_OPB_REGS_OPB_ADDR,
&lpc->opb_master_regs);
memory_region_init_io(&lpc->lpc_hc_regs, OBJECT(dev), &lpc_hc_ops, lpc,
"lpc-hc", LPC_HC_REGS_OPB_SIZE);
/* xscom writes to lpc-hc. As such mark lpc-hc re-entrancy safe */
lpc->lpc_hc_regs.disable_reentrancy_guard = true;
memory_region_add_subregion(&lpc->opb_mr, LPC_HC_REGS_OPB_ADDR,
&lpc->lpc_hc_regs);