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Ard Biesheuvel 2e2c2a5e72 arm: qemu: override flash accessors to use virtualizable instructions 
Some instructions in the ARM ISA have multiple output registers, such
as ldrd/ldp (load pair), where two registers are loaded from memory,
but also ldr with indexing, where the memory base register is incremented
as well when the value is loaded to the destination register.

MMIO emulation under KVM is based on using the architecturally defined
syndrome information that is provided when an exception is taken to the
hypervisor. This syndrome information describes whether the instruction
that triggered the exception is a load or a store, what the faulting
address was, and which register was the destination register.

This syndrome information can only describe one destination register, and
when the trapping instruction is one with multiple outputs, KVM throws an
error like

  kvm [615929]: Data abort outside memslots with no valid syndrome info

on the host and kills the QEMU process with the following error:

  U-Boot 2020.07-rc3-00208-g88bd5b179360-dirty (Jun 06 2020 - 11:59:22 +0200)

  DRAM:  1 GiB
  Flash: error: kvm run failed Function not implemented
  R00=00000001 R01=00000040 R02=7ee0ce20 R03=00000000
  R04=7ffd9eec R05=00000004 R06=7ffda3f8 R07=00000055
  R08=7ffd9eec R09=7ef0ded0 R10=7ee0ce20 R11=00000000
  R12=00000004 R13=7ee0cdf8 R14=00000000 R15=7ff72d08
  PSR=200001d3 --C- A svc32
  QEMU: Terminated

This means that, in order to run U-Boot in QEMU under KVM, we need to
avoid such instructions when accessing emulated devices. For the flash
in particular, which is a hybrid between a ROM (backed by a read-only
KVM memslot) when in array mode, and an emulated MMIO device (when in
write mode), we need to take care to only use instructions that KVM can
deal with when they trap.

So override the flash read accessors that are used when running on QEMU
under KVM. Note that the the 64-bit wide read and write accessors have
been omitted: they are never used when running under QEMU given that it
does not emulate CFI flash that supports it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
2020-07-29 08:43:40 -04:00
..
abilis/tb100 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
advantech treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
alliedtelesis common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
altera ARM: socfpga: Add default FPGA bitstream fitImage for Arria10 SoCDK 2019-05-10 22:48:10 +02:00
amarula/vyasa-rk3288 common: Move serial functions out of common.h 2019-12-02 18:23:11 -05:00
amazon/kc1 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
amlogic boards: amlogic: add Odroid C4 support 2020-07-08 10:52:45 +02:00
AndesTech riscv: ae350: Use fdtdec_get_addr_size_auto_noparent to parse smc reg 2020-07-24 14:56:24 +08:00
Arcturus/ucp1020 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
aries/mcvevk arm: socfpga: Re-add support for Aries MCV SoM and MCVEV[KP] board 2019-05-14 19:52:39 +02:00
aristainetos command: Remove the cmd_tbl_t typedef 2020-05-18 18:36:55 -04:00
armadeus common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
armltd treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
aspeed/evb_ast2500 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
astro/mcf5373l common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
atmark-techno/armadillo-800eva common: Move reset_cpu() to the CPU header 2020-01-24 23:06:49 +05:30
atmel treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
avionic-design common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
bachmann/ot1200 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
barco treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
beacon ARM: rmobile: Add Beacon EmbeddedWorks RZG2M Dev Kit 2020-07-25 14:19:26 +02:00
beckhoff/mx53cx9020 common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
birdland/bav335x arm: Remove bav335x board 2020-07-09 20:58:05 +05:30
bitmain/antminer_s9 xilinx: Introduce board_late_init_xilinx() 2020-04-27 13:57:17 +02:00
bluegiga/apx4devkit treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
bluewater treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
bosch treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
boundary/nitrogen6x treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
broadcom treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
bticino/mamoj common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
buffalo/lsxl common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
BuR treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
BuS/eb_cpu5282 command: Remove the cmd_tbl_t typedef 2020-05-18 18:36:55 -04:00
cadence/xtfpga common: Move some board functions out of common.h 2019-12-02 18:25:21 -05:00
calao/usb_a9263 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
CarMediaLab/flea3 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
cavium/thunderx treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
ccv/xpress treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
cei/cei-tk1-som SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
chipspark/popmetal_rk3288 common: Move some board functions out of common.h 2019-12-02 18:25:21 -05:00
cirrus/edb93xx treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
cloudengines/pogo_e02 common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
cobra5272 common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
compal/paz00 common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
compulab treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
comtrend SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
congatec treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
coreboot x86: Add a 64-bit 'coreboot64' build 2020-05-04 15:28:28 +08:00
corscience/tricorder treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
cortina common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
creative/xfi3 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
cssi treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
CZ.NIC treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
d-link/dns325 common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
davinci/da8xxevm treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
devboards/dbm-soc1 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
dfi common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
dhelectronics treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
ea/mx7ulp_com arm: imx: Finish migration from CONFIG_SECURE_BOOT to CONFIG_IMX_HAB 2020-06-26 10:29:06 -04:00
ebv/socrates arm: socfpga: socrates: make rtc work 2019-04-25 00:00:49 +02:00
eets/pdu001 common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
efi common: Move some board functions out of common.h 2019-12-02 18:25:21 -05:00
egnite/ethernut5 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
el/el6x treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
elgin/elgin_rv1108 common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
embest/mx6boards treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
emulation arm: qemu: override flash accessors to use virtualizable instructions 2020-07-29 08:43:40 -04:00
engicam common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
esd treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
firefly rockchip: roc-rk3399-pc: Set LED only during POR and pwr_key=y 2020-07-22 20:55:13 +08:00
freescale configs:ls1046afrwy: Add tfa secure boot defonfig 2020-07-27 14:23:57 +05:30
gardena common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
gateworks/gw_ventana treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
gdsys treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
ge treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
geekbuying/geekbox rockchip: rk3368: Migrate to use common board file 2019-07-29 10:27:48 +08:00
google treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
grinn treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
hardkernel/odroid_go2 rockchip: board: add Hardkernel Odroid Go2 board 2020-07-22 20:21:23 +08:00
highbank treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
hisilicon treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
huawei/hg556a SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
ids/ids8313 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
imgtec treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
intel x86: minnowmax: Add support for Winbond flash 2020-06-02 09:16:13 +08:00
inversepath/usbarmory treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
iomega/iconnect common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
is1 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
isee treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
k+p common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
keymile board/km: update MAINTAINERS email 2020-07-17 10:47:19 -04:00
kmc/kzm9g treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
kobol/helios4 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
kosagi/novena treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
l+g/vinco treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
LaCie arm: kirkwood: enable DM_ETH for LaCie board 2020-07-09 06:51:20 +02:00
laird treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
lego/ev3 common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
lg/sniper treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
liebherr treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
logicpd treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
Marvell mips: octeon: Add minimal Octeon 3 EBB7304 EVK support 2020-07-18 15:47:50 +02:00
maxbcm common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
mediatek common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
menlo/m53menlo treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
microchip common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
mikrotik/crs3xx-98dx3236 arm: mvebu: Convert CRS305-1G-4S board to CRS3xx-98DX3236 2020-05-27 07:03:17 +02:00
mini-box/picosam9g45 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
mpc8308_p1m treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
mqmaker/miqi_rk3288 rockchip: board: rk3288: remove board_boot_order() 2019-07-20 23:59:44 +08:00
mscc common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
netgear common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
nokia/rx51 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
novtech/meerkat96 arm: imx: Finish migration from CONFIG_SECURE_BOOT to CONFIG_IMX_HAB 2020-06-26 10:29:06 -04:00
nvidia treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
olimex/mx23_olinuxino treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
opalkelly/zynq arm: zynq: Remove low level UART setting 2020-01-14 09:05:53 +01:00
phytec treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
phytium/durian common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
pine64 rockchip: Add initial support for the Pinebook Pro laptop from Pine64. 2020-05-31 22:22:07 +08:00
ppcag/bg0900 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
qca common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
qemu-mips treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
qualcomm treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
radxa SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
raidsonic/ib62x0 common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
raspberrypi/rpi treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
renesas ARM: rmobile: Switch back to fdtdec_setup_memory/banksize_fdt() 2020-07-25 14:46:57 -06:00
rockchip arm64: dts: rockchip: Add Radxa ROCK Pi 4C support 2020-07-22 20:55:13 +08:00
ronetix treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sagem/f@st1704 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
samsung treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sandbox treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sandisk/sansa_fuze_plus treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sbc8349 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sbc8548 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sbc8641d treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
schulercontrol/sc_sps_1 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
Seagate common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
seco treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
seeed/linkit-smart-7688 common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
sfr/nb4_ser SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
siemens treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sifive/fu540 Revert "Revert "riscv: sifive: fu540: Add gpio-restart support"" 2020-07-24 14:55:31 +08:00
sipeed/maix riscv: Add Sipeed Maix support 2020-07-01 15:01:22 +08:00
sks-kinkel/sksimx6 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
socrates treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
softing treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
solidrun treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
somlabs/visionsom-6ull ARM: imx: mx6ull: Add iMX6ULL VisionSOM SoM and EVK 2020-01-20 15:38:16 +01:00
spear treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
sr1500 common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
st treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
ste/stemmy common: Drop init.h from common header 2020-05-18 17:33:33 -04:00
sunxi treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
Synology common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
synopsys common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
sysam common: Move testdram() into init.h 2020-01-24 23:06:49 +05:30
syteco/zmx25 common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
tbs/tbs2910 board: tbs2910: add documentation 2020-06-12 13:17:23 -04:00
tcl/sl50 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
technexion treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
technologic treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
terasic SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
theadorable treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
theobroma-systems rockchip: puma: drop special handling of usb host regulator 2020-06-07 18:57:16 +08:00
ti treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
timll treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
topic/zynq board: topic-miami: Set FCLK1 to 150MHz 2020-06-24 13:11:08 +02:00
toradex treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
tplink/wdr4300 common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
tqc treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
udoo treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
vamrs/rock960_rk3399 rockchip: Remove ARCH= references from documentation 2020-06-02 17:27:04 -04:00
variscite/dart_6ul treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
varisys treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
ve8313 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
vocore/vocore2 mips: Add support for SoM "VoCore2". 2020-04-27 20:30:14 +02:00
vscom/baltos treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
wandboard treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
warp treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
warp7 treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
work-microwave/work_92105 common: Drop linux/delay.h from common header 2020-05-18 21:19:23 -04:00
xes treewide: convert bd_t to struct bd_info by coccinelle 2020-07-17 09:30:13 -04:00
xilinx xilinx: zynqmp: Enable pmufw config reloading 2020-06-25 10:08:04 +02:00
zyxel/nsa310s common: Drop init.h from common header 2020-05-18 17:33:33 -04:00