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[Qemu-devel] [PATCH 14/24] piix_pci: wrap memory update in a transaction
From: |
Avi Kivity |
Subject: |
[Qemu-devel] [PATCH 14/24] piix_pci: wrap memory update in a transaction |
Date: |
Wed, 24 Aug 2011 13:11:13 +0300 |
The code will remap all PAMs, even if just one is updated, resulting
in reduced performance. Wrap in a transaction to detect that those
other PAMs have not changed.
Signed-off-by: Avi Kivity <address@hidden>
---
hw/piix_pci.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index f892994..8f6ea42 100644
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -142,6 +142,7 @@ static void i440fx_update_memory_mappings(PCII440FXState *d)
int i, r;
uint32_t smram;
+ memory_region_transaction_begin();
update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3,
&d->pam_regions[0]);
for(i = 0; i < 12; i++) {
@@ -162,6 +163,7 @@ static void i440fx_update_memory_mappings(PCII440FXState *d)
d->smram_enabled = false;
}
}
+ memory_region_transaction_commit();
}
static void i440fx_set_smm(int val, void *arg)
--
1.7.5.3
- [Qemu-devel] [PATCH 00/24] Memory API conversions, batch 5, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 01/24] arm_sysctl: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 05/24] ReadWriteHandler: remove, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 14/24] piix_pci: wrap memory update in a transaction,
Avi Kivity <=
- [Qemu-devel] [PATCH 09/24] axis_dev88: convert to memory API (RAM only), Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 23/24] milkymist-softusb: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 02/24] stellaris_enet: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 19/24] lm32_boards: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 08/24] armv7m: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 17/24] dummy_m68k: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 10/24] sysbus: add sysbus_add_memory_overlap(), Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH 11/24] integratorcp: convert to memory API (RAM/flash only), Avi Kivity, 2011/08/24