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13ea96fa34
qemu/hw/char
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Evgeny Iakovlev 13ea96fa34 hw/char/pl011: add post_load hook for backwards-compatibility 
Previous change slightly modified the way we handle data writes when
FIFO is disabled. Previously we kept incrementing read_pos and were
storing data at that position, although we only have a
single-register-deep FIFO now. Then we changed it to always store data
at pos 0.

If guest disables FIFO and the proceeds to read data, it will work out
fine, because we still read from current read_pos before setting it to
0.

However, to make code less fragile, introduce a post_load hook for
PL011State and move fixup read FIFO state when FIFO is disabled. Since
we are introducing a post_load hook, also do some sanity checking on
untrusted incoming input state.

Signed-off-by: Evgeny Iakovlev <eiakovlev@linux.microsoft.com>
Message-id: 20230123162304.26254-3-eiakovlev@linux.microsoft.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-03 12:59:22 +00:00
..
avr_usart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
bcm2835_aux.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
cadence_uart.c hw/char: cadence_uart: Log a guest error when device is unclocked or in reset 2021-09-13 16:07:21 +01:00
cmsdk-apb-uart.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
debugcon.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
digic-uart.c bulk: Rename TARGET_FMT_plx -> HWADDR_FMT_plx 2023-01-18 11:14:34 +01:00
escc.c hw/char: fix qcode array bounds check in ESCC impl 2022-04-26 16:12:26 +01:00
etraxfs_ser.c bulk: Rename TARGET_FMT_plx -> HWADDR_FMT_plx 2023-01-18 11:14:34 +01:00
exynos4210_uart.c Drop useless casts from g_malloc() & friends to pointer 2022-10-22 23:15:40 +02:00
goldfish_tty.c hw/m68k: Fix typo in SPDX tag 2021-11-09 10:11:27 +01:00
grlib_apbuart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
ibex_uart.c hw/char: ibex_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
imx_serial.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
ipoctal232.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
Kconfig hw/char: Add config for shakti uart 2021-09-01 11:59:12 +10:00
mcf_uart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
mchp_pfsoc_mmuart.c hw/char/mchp_pfsoc_mmuart: QOM'ify PolarFire MMUART 2021-10-07 08:41:33 +10:00
meson.build hw/char: Add config for shakti uart 2021-09-01 11:59:12 +10:00
nrf51_uart.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
omap_uart.c hw/arm/omap: Drop useless casts from void * to pointer 2023-01-12 17:15:09 +00:00
parallel-isa.c isa: Convert uses of isa_create() with Coccinelle 2020-06-15 22:05:28 +02:00
parallel.c acpi: parallel port: replace ISADeviceClass::build_aml with AcpiDevAmlIfClass:build_dev_aml 2022-06-09 19:32:48 -04:00
pl011.c hw/char/pl011: add post_load hook for backwards-compatibility 2023-02-03 12:59:22 +00:00
renesas_sci.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
riscv_htif.c hw/riscv: spike: Decouple create_fdt() dependency to ELF loading 2023-01-20 10:14:13 +10:00
sclpconsole-lm.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
sclpconsole.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
serial-isa.c acpi: serial-is: replace ISADeviceClass::build_aml with AcpiDevAmlIfClass:build_dev_aml 2022-06-09 19:32:48 -04:00
serial-pci-multi.c include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
serial-pci.c include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
serial.c serial: Allow unaligned i/o access 2022-09-29 14:38:05 +04:00
sh_serial.c hw/char/sh_serial: Add device id to trace output 2021-10-30 18:39:37 +02:00
shakti_uart.c hw/char: shakti_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
sifive_uart.c cleanup: Tweak and re-run return_directly.cocci 2022-12-14 16:19:35 +01:00
spapr_vty.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
stm32f2xx_usart.c Fix STM32F2XX USART data register readout 2021-12-15 10:11:34 +00:00
terminal3270.c s390x: css: report errors from ccw_dstream_read/write 2021-04-09 10:52:13 +02:00
trace-events hw/char/sh_serial: Add device id to trace output 2021-10-30 18:39:37 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
virtio-console.c chardev: mark explicitly first argument as poisoned 2021-08-05 16:15:33 +04:00
virtio-serial-bus.c virtio: drop name parameter for virtio_init() 2022-05-16 04:38:40 -04:00
xen_console.c Include sysemu/sysemu.h a lot less 2019-08-16 13:31:53 +02:00
xilinx_uartlite.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00