File 0270-disable-reentrancy-guard-on-ppc.patch of Package qemu-linux-user

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File 0270-disable-reentrancy-guard-on-ppc.patch of Package qemu-linux-user

From: Olaf Hering <olaf@aepfle.de>
Date: Wed, 6 Sep 2023 12:34:56 +0000
Subject: disable reentrancy guard on ppc

References: bsc#1190011 (CVE-2021-3750)

40p and g3beige will hang forever with these messages:
qemu-system-ppc: warning: Blocked re-entrant IO on MemoryRegion: pci-conf-idx at addr: 0x0
qemu-system-ppc64: warning: Blocked re-entrant IO on MemoryRegion: lpc-hc at addr: 0x34

Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
 hw/pci-host/prep.c | 2 ++
 hw/ppc/pnv_lpc.c   | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 9b6166dc6d462704797aa044ffa7..7ba36cc0a21c73df451034649a15 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -258,10 +258,12 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 
     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
                           "pci-conf-idx", 4);
+    h->conf_mem.disable_reentrancy_guard = true;
     memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);
 
     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
                           "pci-conf-data", 4);
+    h->data_mem.disable_reentrancy_guard = true;
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 
     memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c
index 172a915cfc5580252eb3eeea72a6..74511ac02276ce82510152b6d9d9 100644
--- a/hw/ppc/pnv_lpc.c
+++ b/hw/ppc/pnv_lpc.c
@@ -456,10 +456,12 @@ 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);
+    lpc->lpc_hc_regs.disable_reentrancy_guard = true;
     memory_region_add_subregion(&lpc->opb_mr, LPC_HC_REGS_OPB_ADDR,
                                 &lpc->lpc_hc_regs);

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File 0270-disable-reentrancy-guard-on-ppc.patch of Package qemu-linux-user

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