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Re: [Qemu-devel] enabling bus-master IDE driver
From: |
James Boddington |
Subject: |
Re: [Qemu-devel] enabling bus-master IDE driver |
Date: |
Wed, 10 Nov 2004 11:41:38 +1000 |
User-agent: |
Mozilla Thunderbird 0.9 (X11/20041103) |
Jens Axboe wrote:
Index: hw/ide.c
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/ide.c,v
retrieving revision 1.28
diff -u -r1.28 ide.c
--- hw/ide.c 9 Oct 2004 20:27:55 -0000 1.28
+++ hw/ide.c 7 Nov 2004 09:06:33 -0000
@@ -416,7 +416,7 @@
put_le16(p + 47, 0x8000 | MAX_MULT_SECTORS);
#endif
put_le16(p + 48, 1); /* dword I/O */
- put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
+ put_le16(p + 49, 1 << 9 | 1 << 8); /* DMA and LBA supported */
put_le16(p + 51, 0x200); /* PIO transfer cycle */
put_le16(p + 52, 0x200); /* DMA transfer cycle */
put_le16(p + 53, 1); /* words 54-58 are valid */
I tried the same thing in ide_atapi_identify(). With this dma is now
being set on the cdrom. Using an iso image in the host hard drive as a
cd in qemu, hdparm -t is reporting a speed improvement.
Index: hw/ide.c
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/ide.c,v
retrieving revision 1.29
diff -u -r1.29 ide.c
--- hw/ide.c 9 Nov 2004 22:04:05 -0000 1.29
+++ hw/ide.c 10 Nov 2004 01:19:32 -0000
@@ -458,7 +458,7 @@
padstr((uint8_t *)(p + 23), QEMU_VERSION, 8); /* firmware version */
padstr((uint8_t *)(p + 27), "QEMU CD-ROM", 40); /* model */
put_le16(p + 48, 1); /* dword I/O (XXX: should not be set on CDROM) */
- put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
+ put_le16(p + 49, 1 << 9 | 1 << 8); /* DMA and LBA supported */
put_le16(p + 53, 3); /* words 64-70, 54-58 valid */
put_le16(p + 63, 0x103); /* DMA modes XXX: may be incorrect */
put_le16(p + 64, 1); /* PIO modes */
--
James
- RE: [Qemu-devel] enabling bus-master IDE driver, (continued)
- Re: [Qemu-devel] enabling bus-master IDE driver, Jason Brittain, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jason Brittain, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/11
- Re: [Qemu-devel] enabling bus-master IDE driver, Jens Axboe, 2004/11/12
- Re: [Qemu-devel] enabling bus-master IDE driver, James Boddington, 2004/11/07
- Re: [Qemu-devel] enabling bus-master IDE driver,
James Boddington <=
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/05
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/12
Re: [Qemu-devel] enabling bus-master IDE driver, Juergen Keil, 2004/11/12