Christopher Obbard 72d3e093af um: random: Register random as hwrng-core device ... The UML random driver creates a dummy device under the guest, /dev/hw_random. When this file is read from the guest, the driver reads from the host machine's /dev/random, in-turn reading from the host kernel's entropy pool. This entropy pool could have been filled by a hardware random number generator or just the host kernel's internal software entropy generator. Currently the driver does not fill the guests kernel entropy pool, this requires a userspace tool running inside the guest (like rng-tools) to read from the dummy device provided by this driver, which then would fill the guest's internal entropy pool. This all seems quite pointless when we are already reading from an entropy pool, so this patch aims to register the device as a hwrng device using the hwrng-core framework. This not only improves and cleans up the driver, but also fills the guest's entropy pool without having to resort to using extra userspace tools in the guest. This is typically a nuisance when booting a guest: the random pool takes a long time (~200s) to build up enough entropy since the dummy hwrng is not used to fill the guest's pool. This port was originally attempted by Alexander Neville "dark" (in CC, discussion in Link), but the conversation there stalled since the handling of -EAGAIN errors were no removed and longer handled by the driver. This patch attempts to use the existing method of error handling but utilises the new hwrng core. The issue can be noticed when booting a UML guest: [ 2.560000] random: fast init done [ 214.000000] random: crng init done With the patch applied, filling the pool becomes a lot quicker: [ 2.560000] random: fast init done [ 12.000000] random: crng init done Cc: Alexander Neville <dark@volatile.bz> Link: https://lore.kernel.org/lkml/20190828204609.02a7ff70@TheDarkness/ Link: https://lore.kernel.org/lkml/20190829135001.6a5ff940@TheDarkness.local/ Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk> Signed-off-by: Christopher Obbard <chris.obbard@collabora.com> Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at>		2020-12-13 22:20:58 +01:00
..
accessibility	TTY fixes for 5.10-rc5	2020-11-22 11:52:10 -08:00
acpi	arm64 fixes for -rc6	2020-11-27 10:44:59 -08:00
amba	…
android	task_work: cleanup notification modes	2020-10-17 15:05:30 -06:00
ata	libata-5.10-2020-10-30	2020-10-30 14:51:01 -07:00
atm	atm: nicstar: Unmap DMA on send error	2020-11-18 16:42:07 -08:00
auxdisplay	…
base	PM: runtime: Resume the device earlier in __device_release_driver()	2020-11-02 18:14:07 +01:00
bcma	bcma: use semicolons rather than commas to separate statements	2020-10-01 16:23:50 +03:00
block	loop: Fix occasional uevent drop	2020-11-12 13:59:04 -07:00
bluetooth	Bluetooth: btintel: Replace zero-length array with flexible-array member	2020-10-30 16:57:41 -05:00
bus	bus: ti-sysc: suppress err msg for timers used as clockevent/source	2020-11-19 11:05:48 +02:00
cdrom	…
char	um: random: Register random as hwrng-core device	2020-12-13 22:20:58 +01:00
clk	clk: imx8m: fix bus critical clk registration	2020-11-04 17:13:12 -08:00
clocksource	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
connector	…
counter	counter/ti-eqep: Fix regmap max_register	2020-11-01 17:17:31 +00:00
cpufreq	Merge branch 'cpufreq/arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm	2020-11-23 12:55:01 +01:00
cpuidle	cpuidle: tegra: Annotate tegra_pm_set_cpu_in_lp2() with RCU_NONIDLE	2020-11-16 13:24:32 +01:00
crypto	crypto: sun8x-ce*: update entries to its documentation	2020-10-28 11:41:15 -06:00
dax	mm: fix phys_to_target_node() and memory_add_physaddr_to_nid() exports	2020-11-22 10:48:22 -08:00
dca	…
devfreq	PM / devfreq: tegra30: Improve initial hardware resetting	2020-09-29 17:50:10 +09:00
dio	…
dma	dmaengine fixes for v5.10-rc5	2020-11-20 10:23:49 -08:00
dma-buf	dma-mapping updates for 5.10	2020-10-15 14:43:29 -07:00
edac	EFI changes for v5.10:	2020-10-12 13:26:49 -07:00
eisa	…
extcon	extcon: axp288: Use module_platform_driver to simplify the code	2020-09-30 00:40:06 +09:00
firewire	firewire-ohci: use dma_alloc_pages	2020-09-25 06:20:48 +02:00
firmware	More EFI fixes for v5.10-rc:	2020-11-29 10:18:53 -08:00
fpga	…
fsi	…
gnss	…
gpio	gpio: sifive: Fix SiFive gpio probe	2020-11-11 09:53:09 +01:00
gpu	A bunch of fixes for vc4 fixing some coexistence issue between wifi and	2020-11-27 09:39:51 +10:00
greybus	…
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2020-11-22 14:36:06 -08:00
hsi	…
hv	hyperv-fixes for 5.10-rc5	2020-11-16 15:02:33 -08:00
hwmon	hwmon: (amd_energy) modify the visibility of the counters	2020-11-13 06:46:20 -08:00
hwspinlock	…
hwtracing	coresight: cti: Initialize dynamic sysfs attributes	2020-10-29 20:10:25 +01:00
i2c	i2c: designware: slave should do WRITE_REQUESTED before WRITE_RECEIVED	2020-11-06 16:02:00 +01:00
i3c	* Fix DAA for the pre-reserved address case	2020-10-17 11:01:01 -07:00
ide	block-5.10-2020-10-12	2020-10-13 12:12:44 -07:00
idle	intel_idle: Fix intel_idle() vs tracing	2020-11-24 16:47:36 +01:00
iio	iio: accel: kxcjk1013: Add support for KIOX010A ACPI DSM for setting tablet-mode	2020-11-14 17:33:47 +00:00
infiniband	RDMA/hns: Bugfix for memory window mtpt configuration	2020-11-26 10:57:32 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2020-11-17 12:00:40 -08:00
interconnect	interconnect: fix memory trashing in of_count_icc_providers()	2020-11-20 16:01:35 +02:00
iommu	iommu fixes for -rc6	2020-11-27 10:41:19 -08:00
ipack	…
irqchip	irqchip fixes for Linux 5.10, take #2	2020-11-25 00:56:28 +01:00
isdn	…
leds	leds: pwm: Remove platform_data support	2020-10-07 12:02:58 +02:00
lightnvm	lightnvm: fix out-of-bounds write to array devices->info[]	2020-10-16 09:28:45 -06:00
macintosh	powerpc updates for 5.10	2020-10-16 12:21:15 -07:00
mailbox	ARM: SoC-related driver updates	2020-10-24 10:39:22 -07:00
mcb	…
md	- Improve DM core's bio splitting to use blk_max_size_offset(). Also	2020-10-14 15:05:38 -07:00
media	media: vidtv.rst: add kernel-doc markups	2020-11-26 08:05:24 +01:00
memory	ARM: SoC-related driver updates	2020-10-24 10:39:22 -07:00
memstick	Merge branch 'fixes' into next	2020-09-28 12:17:36 +02:00
message	scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove()	2020-10-26 16:57:18 -04:00
mfd	- New Drivers	2020-10-14 15:56:58 -07:00
misc	habanalabs/gaudi: fix missing code in ECC handling	2020-11-23 20:08:43 +02:00
mmc	mmc: sdhci-of-arasan: Issue DLL reset explicitly	2020-11-17 12:44:44 +01:00
most	…
mtd	mtd: rawnand: socrates: Move the ECC initialization to ->attach_chip()	2020-11-20 12:31:26 +01:00
mux	…
net	can: m_can: m_can_dev_setup(): add support for bosch mcan version 3.3.0	2020-11-27 10:49:20 +01:00
nfc	nfc: s3fwrn5: use signed integer for parsing GPIO numbers	2020-11-24 15:00:53 -08:00
ntb	Bug fixes for v5.10	2020-10-25 11:12:31 -07:00
nubus	…
nvdimm	mm/memremap_pages: support multiple ranges per invocation	2020-10-13 18:38:28 -07:00
nvme	nvme: fix memory leak freeing command effects	2020-11-14 09:57:55 +01:00
nvmem	nvmem: core: fix possibly memleak when use nvmem_cell_info_to_nvmem_cell()	2020-09-27 14:25:48 +02:00
of	of/address: Fix of_node memory leak in of_dma_is_coherent	2020-11-11 17:10:16 -06:00
opp	opp: Reduce the size of critical section in _opp_table_kref_release()	2020-10-27 13:21:03 +05:30
oprofile	…
parisc	dma-mapping: split <linux/dma-mapping.h>	2020-10-06 07:07:03 +02:00
parport	…
pci	PCI: mvebu: Fix duplicate resource requests	2020-11-04 13:55:30 -06:00
pcmcia	dma-mapping: remove DMA_MASK_NONE	2020-09-25 06:12:15 +02:00
perf	perf: arm-cmn: Fix conversion specifiers for node type	2020-10-01 22:30:07 +01:00
phy	phy: mediatek: fix spelling mistake in Kconfig "veriosn" -> "version"	2020-11-16 13:21:28 +05:30
pinctrl	intel-pinctrl for v5.10-2	2020-11-10 15:35:41 +01:00
platform	platform/x86: touchscreen_dmi: Add info for the Irbis TW118 tablet	2020-11-26 15:49:16 +01:00
pnp	PNP: fix kernel-doc markups	2020-10-27 19:23:04 +01:00
power	ARM: SoC platform updates	2020-10-24 10:33:08 -07:00
powercap	Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2020-11-10 10:02:31 -08:00
pps	…
ps3	…
ptp	ptp: clockmatrix: bug fix for idtcm_strverscmp	2020-11-25 17:24:49 -08:00
pwm	ARM: SoC platform updates	2020-10-24 10:33:08 -07:00
rapidio	rapidio: fix the missed put_device() for rio_mport_add_riodev	2020-10-16 11:11:22 -07:00
ras	RAS/CEC: Convert to DEFINE_SHOW_ATTRIBUTE()	2020-09-25 19:05:31 +02:00
regulator	regulator: ti-abb: Fix array out of bound read access on the first transition	2020-11-18 17:59:24 +00:00
remoteproc	remoteproc updates for v5.10	2020-10-22 12:56:33 -07:00
reset	ARM: SoC-related driver updates	2020-10-24 10:39:22 -07:00
rpmsg	rpmsg updates for 5.10	2020-10-22 12:58:21 -07:00
rtc	RTC for 5.10	2020-10-21 11:22:08 -07:00
s390	Networking fixes for 5.10-rc6, including fixes from the WiFi driver,	2020-11-27 14:38:02 -08:00
sbus	…
scsi	SCSI fixes on 20201127	2020-11-27 14:06:23 -08:00
sfi	…
sh	…
siox	…
slimbus	slimbus: qcom-ngd-ctrl: disable ngd in qmi server down callback	2020-09-25 14:41:51 +02:00
soc	NXP/FSL SoC driver fix for 5.10	2020-11-26 22:07:22 +01:00
soundwire	soundwire updates for 5.10-rc1	2020-10-01 22:59:55 +02:00
spi	spi: dw: Fix spi registration for controllers overriding CS	2020-11-25 12:54:05 +00:00
spmi	…
ssb	…
staging	media fixes for v5.10-rc6	2020-11-25 10:35:44 -08:00
target	SCSI fixes on 20201120	2020-11-20 16:24:28 -08:00
tc	…
tee	ARM: SoC fixes for v5.10, part 3	2020-11-27 14:48:03 -08:00
thermal	thermal: ti-soc-thermal: Disable the CPU PM notifier for OMAP4430	2020-11-12 12:30:29 +01:00
thunderbolt	thunderbolt: Add support for Intel Tiger Lake-H	2020-11-06 16:39:11 +03:00
tty	serial: ar933x_uart: disable clk on error handling path in probe	2020-11-12 09:41:07 +01:00
uio	uio: Fix use-after-free in uio_unregister_device()	2020-11-09 18:54:30 +01:00
usb	usb: typec: stusb160x: fix power-opmode property with typec-power-opmode	2020-11-27 14:44:26 +01:00
vdpa	vhost,vdpa: fixes	2020-11-16 14:58:23 -08:00
vfio	vfio/pci: Bypass IGD init in case of -ENODEV	2020-11-03 11:07:40 -07:00
vhost	vhost scsi: Add support for LUN resets.	2020-11-15 17:30:55 -05:00
video	hyperv-fixes for 5.10-rc6	2020-11-23 15:29:03 -08:00
virt	nitro_enclaves: Fixup type and simplify logic of the poll mask setup	2020-11-09 18:20:36 +01:00
virtio	vhost,vdpa,virtio: cleanups, fixes	2020-10-23 11:00:57 -07:00
visorbus	…
vlynq	…
vme	…
w1	w1: w1_therm: make w1_poll_completion static	2020-10-05 14:49:24 +02:00
watchdog	ARM: SoC platform updates	2020-10-24 10:33:08 -07:00
xen	swiotlb: remove the tbl_dma_addr argument to swiotlb_tbl_map_single	2020-11-02 10:10:39 -05:00
zorro	…
Kconfig	…
Makefile	…