From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Wed, 4 Jan 2023 08:35:22 +0000 (+0100)
Subject: hw/mips/gt64xxx_pci: Accumulate address space changes
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=65423e6efeac1ee1057870361337c572c941140c;p=qmiga%2Fqemu.git

hw/mips/gt64xxx_pci: Accumulate address space changes

Single registers access in ISD can produce multiple changes
in the address spaces. To reduce computational effort,
accumulate these as a single memory transaction.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230104133935.4639-5-philmd@linaro.org>
---

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 164866cf3e..65416c7b27 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -282,6 +282,8 @@ static void gt64120_isd_mapping(GT64120State *s)
     hwaddr start = ((hwaddr)s->regs[GT_ISD] << 21) & 0xFFFE00000ull;
     hwaddr length = 0x1000;
 
+    memory_region_transaction_begin();
+
     if (s->ISD_length) {
         memory_region_del_subregion(get_system_memory(), &s->ISD_mem);
     }
@@ -292,10 +294,14 @@ static void gt64120_isd_mapping(GT64120State *s)
     s->ISD_start = start;
     s->ISD_length = length;
     memory_region_add_subregion(get_system_memory(), s->ISD_start, &s->ISD_mem);
+
+    memory_region_transaction_commit();
 }
 
 static void gt64120_pci_mapping(GT64120State *s)
 {
+    memory_region_transaction_begin();
+
     /* Update PCI0IO mapping */
     if ((s->regs[GT_PCI0IOLD] & 0x7f) <= s->regs[GT_PCI0IOHD]) {
         /* Unmap old IO address */
@@ -354,6 +360,8 @@ static void gt64120_pci_mapping(GT64120State *s)
                                         &s->PCI0M1_mem);
         }
     }
+
+    memory_region_transaction_commit();
 }
 
 static int gt64120_post_load(void *opaque, int version_id)