Hi,
When booting up windows VM which converted by dd windows physical
partition,
it failed with "Error Loading Operating System", the partition build on
scsi/raid controller. The root cause is qemu and hvmloader could not
calaulated C/H/S correctly, then ntloader could not found the root
partition.
Signed-off-by: zhenzhong.duan <zhenzhong.duan@xxxxxxxxxx>
Signed-off-by: Joe Jin <joe.jin@xxxxxxxxxx>
diff -urNp xen-3.4.0/qemu-xen.git/block.c xen-3.4.0_lba/qemu-xen.git/block.c
--- xen-3.4.0/qemu-xen.git/block.c 2010-08-02 15:32:21.000000000 +0800
+++ xen-3.4.0_lba/qemu-xen.git/block.c 2010-08-02 13:37:56.000000000 +0800
@@ -884,7 +884,12 @@ void bdrv_guess_geometry(BlockDriverStat
*psecs = secs;
} else {
if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) {
- if (heads > 16) {
+ if(secs==32){
+ *pcyls = cylinders;
+ *pheads = heads;
+ *psecs = secs;
+ bdrv_set_translation_hint(bs, BIOS_ATA_TRANSLATION_LBA);
+ } else if (heads > 16) {
/* if heads > 16, it means that a BIOS LBA
translation was active, so the default
hardware geometry is OK */
diff -urNp xen-3.4.0/tools/firmware/rombios/rombios.c
xen-3.4.0_lba/tools/firmware/rombios/rombios.c
--- xen-3.4.0/tools/firmware/rombios/rombios.c 2009-05-19 02:20:46.000000000
+0800
+++ xen-3.4.0_lba/tools/firmware/rombios/rombios.c 2010-08-02
15:46:43.000000000 +0800
@@ -2740,8 +2740,7 @@ void ata_detect( )
case ATA_TRANSLATION_NONE:
break;
case ATA_TRANSLATION_LBA:
- spt = 63;
- sectors_low /= 63;
+ sectors_low /= spt;
heads = sectors_low / 1024;
if (heads>128) heads = 255;
else if (heads>64) heads = 128;
@@ -5442,6 +5441,7 @@ int13_harddisk(EHAX, DS, ES, DI, SI, BP,
Bit16u npc, nph, npspt, nlc, nlh, nlspt;
Bit16u size, count;
Bit8u device, status;
+ Bit8u translation;
BX_DEBUG_INT13_HD("int13_harddisk: AX=%04x BX=%04x CX=%04x DX=%04x
ES=%04x\n", AX, BX, CX, DX, ES);
@@ -5512,8 +5512,10 @@ int13_harddisk(EHAX, DS, ES, DI, SI, BP,
nph = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.heads);
npspt = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.spt);
+ translation =
read_byte(ebda_seg,&EbdaData->ata.devices[device].translation);
+
// if needed, translate lchs to lba, and execute command
- if ( (nph != nlh) || (npspt != nlspt)) {
+ if ( (nph != nlh) || (npspt != nlspt) || (translation ==
(ATA_TRANSLATION_LBA))) {
lba_low = ((((Bit32u)cylinder * (Bit32u)nlh) + (Bit32u)head) *
(Bit32u)nlspt) + (Bit32u)sector - 1;
lba_high = 0;
sector = 0; // this forces the command to be lba
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