mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
6fd704a59a
qemu/hw
History
Klaus Jensen 54064e51d1 hw/block/nvme: add dulbe support 
Add support for reporting the Deallocated or Unwritten Logical Block
Error (DULBE).

Rely on the block status flags reported by the block layer and consider
any block with the BDRV_BLOCK_ZERO flag to be deallocated.

Multiple factors affect when a Write Zeroes command result in
deallocation of blocks.

  * the underlying file system block size
  * the blockdev format
  * the 'discard' and 'logical_block_size' parameters

     format | discard | wz (512B)  wz (4KiB)  wz (64KiB)
    -----------------------------------------------------
      qcow2    ignore   n          n          y
      qcow2    unmap    n          n          y
      raw      ignore   n          y          y
      raw      unmap    n          y          y

So, this works best with an image in raw format and 4KiB LBAs, since
holes can then be punched on a per-block basis (this assumes a file
system with a 4kb block size, YMMV). A qcow2 image, uses a cluster size
of 64KiB by default and blocks will only be marked deallocated if a full
cluster is zeroed or discarded. However, this *is* consistent with the
spec since Write Zeroes "should" deallocate the block if the Deallocate
attribute is set and "may" deallocate if the Deallocate attribute is not
set. Thus, we always try to deallocate (the BDRV_REQ_MAY_UNMAP flag is
always set).

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
2021-02-08 18:55:48 +01:00
..
9pfs 9pfs: Convert reclaim list to QSLIST 2021-01-22 18:26:40 +01:00
acpi acpi: Permit OEM ID and OEM table ID fields to be changed 2021-02-05 08:52:59 -05:00
adc hw/adc: Add an ADC module for NPCM7XX 2021-01-12 21:19:02 +00:00
alpha vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
arm acpi: use constants as strncpy limit 2021-02-05 08:52:59 -05:00
audio audio/via-ac97: Simplify code and set user_creatable to false 2021-01-04 23:24:44 +01:00
avr vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
block hw/block/nvme: add dulbe support 2021-02-08 18:55:48 +01:00
char hw/char/exynos4210_uart: Fix missing call to report ready for input 2021-02-02 17:00:54 +00:00
core confidential guest support: Alter virtio default properties for protected guests 2021-02-08 16:57:38 +11:00
cpu cpu/core: Register core-id and nr-threads as class properties 2020-09-22 16:48:29 -04:00
cris cris: do not use ram_size global 2020-12-10 12:15:07 -05:00
display display/ui: add a callback to indicate GL state is flushed 2021-02-04 15:58:54 +01:00
dma hw/arm/xlnx-versal: Versal SoC requires ZDMA 2021-02-03 10:15:50 +00:00
gpio hw: gpio: implement gpio-pwr driver for qemu reset/poweroff 2021-01-29 10:47:28 +00:00
hppa hw: Use the PCI_SLOT() macro from 'hw/pci/pci.h' 2021-01-04 23:24:44 +01:00
hyperv qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
i2c nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
i386 sev: Remove false abstraction of flash encryption 2021-02-08 16:57:38 +11:00
ide block: Separate blk_is_writable() and blk_supports_write_perm() 2021-01-27 20:45:20 +01:00
input Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
intc hw/intc/arm_gic: Fix interrupt ID in GICD_SGIR register 2021-02-02 17:00:55 +00:00
ipack Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
ipmi Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
isa vt82c686: Rename superio config related parts 2021-01-04 23:24:44 +01:00
lm32 vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
m68k hw/m68k/next-cube: Add vmstate for NeXTPC device 2021-01-19 09:11:52 +01:00
mem nvdimm: check -object memory-backend-file, readonly=on option 2021-02-01 17:07:34 -05:00
microblaze vl: make qemu_get_machine_opts static 2020-12-15 12:51:55 -05:00
mips cpu: tcg_ops: move to tcg-cpu-ops.h, keep a pointer in CPUClass 2021-02-05 10:24:15 -10:00
misc hw/misc/pvpanic: add PCI interface support 2021-01-29 10:47:28 +00:00
moxie moxie: do not use ram_size global 2020-12-10 12:15:08 -05:00
net net: checksum: Introduce fine control over checksum type 2021-01-25 17:04:56 +08:00
nios2 * New -action option and set-action QMP command (Alejandro) 2020-12-15 21:24:31 +00:00
nubus meson: convert hw/nubus 2020-08-21 06:30:25 -04:00
nvram hw/*: Use type casting for SysBusDevice in NPCM7XX 2021-01-12 21:19:02 +00:00
openrisc target/openrisc: Move pic_cpu code into CPU object proper 2020-12-15 12:04:30 +00:00
pci pci: add romsize property 2021-02-05 08:52:58 -05:00
pci-bridge Kconfig: Compile PXB for ARM_VIRT 2021-01-17 06:42:54 -05:00
pci-host acpi/gpex: Exclude pxb's resources from PCI0 2021-01-17 06:42:54 -05:00
pcmcia pxa2xx: Move QOM macros to header 2020-08-27 14:04:55 -04:00
ppc spapr: PEF: prevent migration 2021-02-08 16:57:38 +11:00
rdma Machine queue, 2020-12-23 2021-01-01 22:57:15 +00:00
riscv riscv: Pass RISCVHartArrayState by pointer 2021-01-16 14:34:46 -08:00
rtc pl031: Use timer_free() in the finalize function to avoid memleaks 2021-01-18 11:51:26 +01:00
rx rx: move BIOS load from MCU to board 2020-12-10 12:15:06 -05:00
s390x s390: Recognize confidential-guest-support option 2021-02-08 16:57:38 +11:00
scsi block: Separate blk_is_writable() and blk_supports_write_perm() 2021-01-27 20:45:20 +01:00
sd block: Separate blk_is_writable() and blk_supports_write_perm() 2021-01-27 20:45:20 +01:00
semihosting semihosting: Implement SYS_ISERROR 2021-01-18 10:05:06 +00:00
sh4 hw: Use the PCI_SLOT() macro from 'hw/pci/pci.h' 2021-01-04 23:24:44 +01:00
smbios i386: do not use ram_size global 2020-12-10 12:15:08 -05:00
sparc sun4m: don't connect two qemu_irqs directly to the same input 2021-01-06 11:41:37 +00:00
sparc64 vl: extract softmmu/datadir.c 2020-12-10 12:15:18 -05:00
ssi hw/ssi: imx_spi: Correct tx and rx fifo endianness 2021-02-02 17:00:55 +00:00
timer arm: Remove frq properties on CMSDK timer, dualtimer, watchdog, ARMSSE 2021-01-29 15:54:44 +00:00
tpm tpm: tpm_spapr: Remove unused tracepoint 2021-01-25 20:56:38 -05:00
tricore tricore tcg cpus: Fix Lesser GPL version number 2020-11-15 16:40:30 +01:00
unicore32 meson: convert hw/arch* 2020-08-21 06:30:33 -04:00
usb block: Separate blk_is_writable() and blk_supports_write_perm() 2021-01-27 20:45:20 +01:00
vfio ui: add an optional get_flags callback to GraphicHwOps 2021-02-04 15:58:54 +01:00
virtio vhost: Check for valid vdev in vhost_backend_handle_iotlb_msg 2021-02-05 08:52:59 -05:00
watchdog arm: Remove frq properties on CMSDK timer, dualtimer, watchdog, ARMSSE 2021-01-29 15:54:44 +00:00
xen pci: add romsize property 2021-02-05 08:52:58 -05:00
xenpv meson: convert hw/arch* 2020-08-21 06:30:33 -04:00
xtensa vl: make qemu_get_machine_opts static 2020-12-15 12:51:55 -05:00
Kconfig hw/net/can: ZynqMP CAN device requires PTIMER 2021-02-03 10:15:50 +00:00
meson.build meson: convert hw/arch* 2020-08-21 06:30:33 -04:00