[qemu-xen stable-4.18] lsi53c895a: disable reentrancy detection for script RAM

[patchbot@xxxxxxx]

commit db43c7db206427ff5f6cbc7116c66d6cc6e81385
Author:     Alexander Bulekov <alxndr@xxxxxx>
AuthorDate: Thu Apr 27 17:10:10 2023 -0400
Commit:     Michael Tokarev <mjt@xxxxxxxxxx>
CommitDate: Sun Sep 10 19:38:01 2023 +0300

    lsi53c895a: disable reentrancy detection for script RAM
    
    As the code is designed to use the memory APIs to access the script ram,
    disable reentrancy checks for the pseudo-RAM ram_io MemoryRegion.
    
    In the future, ram_io may be converted from an IO to a proper RAM 
MemoryRegion.
    
    Reported-by: Fiona Ebner <f.ebner@xxxxxxxxxxx>
    Signed-off-by: Alexander Bulekov <alxndr@xxxxxx>
    Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
    Reviewed-by: Darren Kenny <darren.kenny@xxxxxxxxxx>
    Message-Id: <20230427211013.2994127-6-alxndr@xxxxxx>
    Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
    (cherry picked from commit bfd6e7ae6a72b84e2eb9574f56e6ec037f05182c)
    Signed-off-by: Michael Tokarev <mjt@xxxxxxxxxx>
---
 hw/scsi/lsi53c895a.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
index bbf32d3f73..17af67935f 100644
--- a/hw/scsi/lsi53c895a.c
+++ b/hw/scsi/lsi53c895a.c
@@ -2313,6 +2313,12 @@ static void lsi_scsi_realize(PCIDevice *dev, Error 
**errp)
     memory_region_init_io(&s->io_io, OBJECT(s), &lsi_io_ops, s,
                           "lsi-io", 256);
 
+    /*
+     * Since we use the address-space API to interact with ram_io, disable the
+     * re-entrancy guard.
+     */
+    s->ram_io.disable_reentrancy_guard = true;
+
     address_space_init(&s->pci_io_as, pci_address_space_io(dev), "lsi-pci-io");
     qdev_init_gpio_out(d, &s->ext_irq, 1);
 
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.18