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[Qemu-devel] [PATCH v2 12/22] piix_pci: wrap memory update in a transact
From: |
Avi Kivity |
Subject: |
[Qemu-devel] [PATCH v2 12/22] piix_pci: wrap memory update in a transaction |
Date: |
Wed, 24 Aug 2011 16:40:49 +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 v2 06/22] armv7m: convert to memory API, (continued)
- [Qemu-devel] [PATCH v2 06/22] armv7m: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 07/22] axis_dev88: convert to memory API (RAM only), Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 19/22] mcf5208: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 11/22] cirrus: wrap memory update in a transaction, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 16/22] g364fb: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 17/22] lm32_boards: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 13/22] Makefile.hw: allow hw/ files to include glib headers, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 05/22] an5206: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 04/22] ReadWriteHandler: remove, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 12/22] piix_pci: wrap memory update in a transaction,
Avi Kivity <=
- [Qemu-devel] [PATCH v2 14/22] pflash_cfi01/pflash_cfi02: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 18/22] mainstone: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 15/22] dummy_m68k: convert to memory API, Avi Kivity, 2011/08/24
- [Qemu-devel] [PATCH v2 21/22] milkymist-softusb: convert to memory API, Avi Kivity, 2011/08/24
- Re: [Qemu-devel] [PATCH v2 00/22] Memory API conversions, batch 5, Richard Henderson, 2011/08/24