RE: [PATCH v1 2/2] swiotlb: Fix slot alignment checks

[Dexuan Cui]

> From: Dexuan-Linux Cui <dexuan.linux@xxxxxxxxx>
> Sent: Tuesday, April 4, 2023 12:55 PM
> 
> On Tue, Mar 21, 2023 at 1:37 AM Petr Tesarik
> <petrtesarik@xxxxxxxxxxxxxxx> wrote:
> ...
> 
> Hi Petr, this patch has gone into the mainline:
> 0eee5ae10256 ("swiotlb: fix slot alignment checks")
> 
> Somehow it breaks Linux VMs on Hyper-V: a regular VM with
> swiotlb=force or a confidential VM (which uses swiotlb) fails to boot.
> If I revert this patch, everything works fine.

The log is pasted below. Looks like the SCSI driver hv_storvsc fails to
detect the disk capacity:

[    1.791386] scsi host0: storvsc_host_t
[    1.793653] scsi host0: scsi scan: INQUIRY result too short (5), using 36
[    1.798733] scsi 0:0:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.807677] hv_utils: Shutdown IC version 3.2
[    1.810275] hv_utils: Heartbeat IC version 3.0
[    1.812777] hv_utils: TimeSync IC version 4.0
[    1.814877] hv_utils: VSS IC version 5.0
[    1.818004] input: Microsoft Vmbus HID-compliant Mouse as /devices/0006:045E:0621.0001/input/input1
[    1.822072] scsi 0:0:1:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.825829] hid 0006:045E:0621.0001: input: VIRTUAL HID v0.01 Mouse [Microsoft Vmbus HID-compliant Mouse] on
[    1.831600] scsi 0:1:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.839110] scsi 0:2:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.851133] scsi 0:3:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.858146] scsi 0:4:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.865251] scsi 0:5:0:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.874743] scsi 0:5:1:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.882964] scsi 0:6:1:0: Direct-Access                                    PQ: 0 ANSI: 0
[    1.887850] sd 0:0:0:0: [sda] Sector size 0 reported, assuming 512.
[    1.890168] sd 0:0:0:0: [sda] 1 512-byte logical blocks: (512 B/512 B)
[    1.892370] sd 0:0:0:0: [sda] 0-byte physical blocks
[    1.894382] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    1.899034] sd 0:0:1:0: Attached scsi generic sg1 type 0
[    1.901143] sd 0:0:1:0: [sdb] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.909499] sd 0:0:0:0: [sda] Write Protect is off
[    1.911488] sd 0:0:0:0: [sda] Mode Sense: 0f 00 00 00
[    1.913549] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#230 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.917776] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#232 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.922358] sd 0:0:0:0: [sda] Asking for cache data failed
[    1.924724] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#233 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.928971] sd 0:0:0:0: [sda] Assuming drive cache: write through
[    1.931454] sd 0:0:1:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.935571] sd 0:0:1:0: [sdb] Sense not available.
[    1.937505] sd 0:0:1:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
[    1.940095] sd 0:0:1:0: [sdb] 0-byte physical blocks
[    1.942268] sd 0:1:0:0: Attached scsi generic sg2 type 0
[    1.944508] sd 0:1:0:0: [sdc] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.948502] sd 0:2:0:0: Attached scsi generic sg3 type 0
[    1.951059] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#238 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.955212] sd 0:2:0:0: [sdd] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.959914] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#243 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.964798] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#244 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.969673] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#242 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.975334] sd 0:1:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.980447] sd 0:1:0:0: [sdc] Sense not available.
[    1.983105] sd 0:1:0:0: [sdc] 0 512-byte logical blocks: (0 B/0 B)
[    1.985556] sd 0:1:0:0: [sdc] 0-byte physical blocks
[    1.987686] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#246 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.991294] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#247 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    1.994927] sd 0:2:0:0: [sdd] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    1.998798] sd 0:2:0:0: [sdd] Sense not available.
[    2.000695] sd 0:2:0:0: [sdd] 0 512-byte logical blocks: (0 B/0 B)
[    2.003122] sd 0:2:0:0: [sdd] 0-byte physical blocks
[    2.005154] sd 0:0:1:0: [sdb] Write Protect is off
[    2.007093] sd 0:0:1:0: [sdb] Mode Sense: 00 00 00 00
[    2.012281] sd 0:0:0:0: [sda] 62914560 512-byte logical blocks: (32.2 GB/30.0 GiB)
[    2.015526] sd 0:0:1:0: [sdb] Asking for cache data failed
[    2.017656] sd 0:0:1:0: [sdb] Assuming drive cache: write through
[    2.022852] scsi 0:3:0:0: Attached scsi generic sg4 type 0
[    2.025207] sda: detected capacity change from 1 to 62914560
[    2.027505] sd 0:3:0:0: [sde] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.031552] sd 0:2:0:0: [sdd] Write Protect is off
[    2.033499] sd 0:2:0:0: [sdd] Mode Sense: 00 00 00 00
[    2.036251] scsi 0:4:0:0: Attached scsi generic sg5 type 0
[    2.040389] sd 0:1:0:0: [sdc] Write Protect is off
[    2.043462] sd 0:1:0:0: [sdc] Mode Sense: 00 00 00 00
[    2.048283] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#195 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.055024] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#201 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.061523] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#203 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.065756] sd 0:3:0:0: [sde] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.070088] sd 0:3:0:0: [sde] Sense not available.
[    2.072032] sd 0:3:0:0: [sde] 0 512-byte logical blocks: (0 B/0 B)
[    2.074552] sd 0:3:0:0: [sde] 0-byte physical blocks
[    2.078153]  sda: sda1 sda2
[    2.079438] sd 0:0:0:0: [sda] Attached SCSI disk
[    2.086736] sd 0:2:0:0: [sdd] Asking for cache data failed
[    2.089158] sd 0:2:0:0: [sdd] Assuming drive cache: write through
[    2.091697] scsi 0:5:0:0: Attached scsi generic sg6 type 0
[    2.097017] sd 0:4:0:0: [sdf] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.106996] sd 0:5:0:0: [sdg] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.116632] sd 0:0:1:0: [sdb] Attached SCSI disk
[    2.121353] sd 0:1:0:0: [sdc] Asking for cache data failed
[    2.124340] sd 0:1:0:0: [sdc] Assuming drive cache: write through
[    2.126908] sd 0:2:0:0: [sdd] Attached SCSI disk
[    2.128933] sd 0:1:0:0: [sdc] Attached SCSI disk
[    2.134829] scsi 0:5:1:0: Attached scsi generic sg7 type 0
[    2.137257] sd 0:3:0:0: [sde] Write Protect is off
[    2.139505] sd 0:3:0:0: [sde] Mode Sense: 00 00 00 00
[    2.141599] sd 0:5:1:0: [sdh] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.145592] sd 0:6:1:0: Attached scsi generic sg8 type 0
[    2.147823] sd 0:6:1:0: [sdi] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.151779] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#218 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.159318] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#228 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.164433] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#229 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.173750] sd 0:5:0:0: [sdg] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.182248] sd 0:5:0:0: [sdg] Sense not available.
[    2.186502] sd 0:5:0:0: [sdg] 0 512-byte logical blocks: (0 B/0 B)
[    2.193049] sd 0:5:0:0: [sdg] 0-byte physical blocks
[    2.199001] sd 0:3:0:0: [sde] Asking for cache data failed
[    2.202651] sd 0:3:0:0: [sde] Assuming drive cache: write through
[    2.205291] tsc: Refined TSC clocksource calibration: 2445.433 MHz
[    2.207988] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x233fde66930, max_idle_ns: 440795269764 ns
[    2.211972] clocksource: Switched to clocksource tsc
[    2.213963] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#215 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.213970] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#223 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.222735] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#231 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.229023] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#232 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.240583] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#233 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.250532] sd 0:4:0:0: [sdf] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.254627] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#234 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.258915] sd 0:4:0:0: [sdf] Sense not available.
[    2.260798] sd 0:4:0:0: [sdf] 0 512-byte logical blocks: (0 B/0 B)
[    2.263232] sd 0:4:0:0: [sdf] 0-byte physical blocks
[    2.265677] sd 0:5:1:0: [sdh] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.269502] sd 0:5:1:0: [sdh] Sense not available.
[    2.271426] sd 0:5:1:0: [sdh] 0 512-byte logical blocks: (0 B/0 B)
[    2.276504] sd 0:5:1:0: [sdh] 0-byte physical blocks
[    2.283703] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#227 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.293754] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#237 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.300010] hv_storvsc 76c5f856-c9ce-4ea3-9d8e-d2bf5ac6747a: tag#238 cmd 0x25 status: scsi 0x0 srb 0x20 hv 0xc0000001
[    2.305091] sd 0:6:1:0: [sdi] Read Capacity(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[    2.309634] sd 0:6:1:0: [sdi] Sense not available.
[    2.312133] sd 0:6:1:0: [sdi] 0 512-byte logical blocks: (0 B/0 B)
[    2.315019] sd 0:6:1:0: [sdi] 0-byte physical blocks
[    2.317353] sd 0:4:0:0: [sdf] Write Protect is off
[    2.319615] sd 0:4:0:0: [sdf] Mode Sense: 00 00 00 00
[    2.321973] sd 0:5:1:0: [sdh] Write Protect is off
[    2.324230] sd 0:5:1:0: [sdh] Mode Sense: 00 00 00 00
[    2.326818] sd 0:3:0:0: [sde] Attached SCSI disk
[    2.335850] sd 0:4:0:0: [sdf] Asking for cache data failed
[    2.341425] sd 0:4:0:0: [sdf] Assuming drive cache: write through
[    2.352240] sd 0:5:0:0: [sdg] Write Protect is off
[    2.358843] sd 0:5:0:0: [sdg] Mode Sense: 00 00 00 00
[    2.386333]d 0:5:1:0: [sd Assuming drivcache: write tough
[    2.395290] sd 0:5:0:0: [sdg] Asking for cache data failed
[    2.400239]d 0:5:0:0: [sd Assuming drivcache: write tough
[    2.4585] sd 0:6:1: Write Protects off
[    2.d 0:6:1:0: [sd Mode Sense: 000 00 00
[    2.440720] sd 0:4:0:0: [sdf] Attached SCSI disk
[    2.450925] sd 0:5:0:0: [sdg] Attached SCSI disk
[    2.470751] sd 0:5:1:0: [sdh] Attached SCSI disk
[    2.474839] sd 0:6:1:0: [sdi] Asking for cache data failed
[    2.478808] sd 0:6:1:0: [sdi] Assuming drive cache: write through
[    2.494906] sd 0:6:1:0: [sdi Attached SCSIisk
[    2.541039] cryptd: max_cpu_qlen set to 1000
[    2.554484] AVX2 version of gcm_enc/dec engaged.
[    2.561082] AES CTR mode by8 optimization enabled
Begin: Loading essential drivers ... [    3.954725] raid6: avx2x4   gen() 20660 MB/s
[    4.022722] raid6: avx2x2   gen() 21612 MB/s
[    4.090723] raid6: avx2x1   gen() 20625 MB/s
[    4.093012] raid6: using algorithm avx2x2 gen() 21612 MB/s
[    4.162724] raid6: .... xor() 22220 MB/s, rmw enabled
[    4.165476] raid6: using avx2x2 recovery algorithm
[    4.169108] xor: automatically using best checksumming function   avx
[    4.174086] async_tx: api initialized (async)
done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... [    4.299146] Btrfs loaded, crc32c=crc32c-intel, zoned=yes, fsverity=yes
Scanning for Btrfs filesystems
Begin: Waiting for suspend/resume device ... Begin: Running /scripts/local-block ... mdadm: No devices listed in conf file were found.
done.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: error opening /dev/md?*: No such file or directory
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
done.
Gave up waiting for suspend/resume device
done.
Begin: Waiting for root file system ... Begin: Running /scripts/local-block ... mdadm: No devices listed in conf file were found.
done.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
mdadm: No devices listed in conf file were found.
done.
Gave up waiting for root file system device.  Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT!  UUID=f4d836dc-a741-45ee-8d4a-09cf96d7ed15 does not exist.  Dropping to a shell!


BusyBox v1.30.1 (Ubuntu 1:1.30.1-4ubuntu6.4) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs)