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qemu/include/hw
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Frederic Barrat f657721187 ppc/xive: Update the state of the External interrupt signal 
When pulling or pushing an OS context from/to a CPU, we should
re-evaluate the state of the External interrupt signal. Otherwise, we
can end up catching the External interrupt exception in hypervisor
mode, which is unexpected.

The problem is best illustrated with the following scenario:

1. an External interrupt is raised while the guest is on the CPU.

2. before the guest can ack the External interrupt, an hypervisor
interrupt is raised, for example the Hypervisor Decrementer or
Hypervisor Virtualization interrupt. The hypervisor interrupt forces
the guest to exit while the External interrupt is still pending.

3. the hypervisor handles the hypervisor interrupt. At this point, the
External interrupt is still pending. So it's very likely to be
delivered while the hypervisor is running. That's unexpected and can
result in an infinite loop where the hypervisor catches the External
interrupt, looks for an interrupt in its hypervisor queue, doesn't
find any, exits the interrupt handler with the External interrupt
still raised, repeat...

The fix is simply to always lower the External interrupt signal when
pulling an OS context. It means it needs to be raised again when
re-pushing the OS context. Fortunately, it's already the case, as we
now always call xive_tctx_ipb_update(), which will raise the signal if
needed.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220429071620.177142-3-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2022-05-05 15:36:17 -03:00
..
acpi acpi: fix acpi_index migration 2022-04-06 20:03:26 +01:00
adc aspeed/adc: Add AST1030 support 2022-05-02 17:03:02 +02:00
arm aspeed/soc : Add AST1030 support 2022-05-02 17:03:03 +02:00
audio qom: Put name parameter before value / visitor parameter 2020-07-10 15:18:08 +02:00
block block: Add backend_defaults property 2021-07-06 14:28:55 +01:00
char hw/riscv: spike: Allow using binary firmware as bios 2022-01-21 15:52:56 +10:00
core hw/core: Move the ARM sysbus-fdt to core 2022-04-29 10:48:26 +10:00
cpu Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
cris hw: Replace anti-social QOM type names 2021-03-19 15:18:43 +01:00
display macfb: increase number of registers saved in MacfbState 2022-03-09 09:29:10 +00:00
dma hw/dma/xlnx_csu_dma: Support starting a read transfer through a class method 2022-01-28 14:29:46 +00:00
firmware hw/smbios: Use qapi for SmbiosEntryPointType 2022-01-07 05:19:55 -05:00
gpio hw: aspeed_gpio: Fix GPIO array indexing 2021-10-12 08:20:08 +02:00
hyperv hyperv: Add support to process syndbg commands 2022-04-06 14:31:56 +02:00
i2c hw/i2c: Added linear mode translation for pmbus devices 2022-03-08 18:46:48 +01:00
i386 i386: factor out x86_firmware_configure() 2022-04-27 07:51:01 +02:00
ide ide: Rename ide_bus_new() to ide_bus_init() 2021-09-30 13:44:13 +01:00
input hw/acpi: add indication for i8042 in IA-PC boot flags of the FADT table 2022-03-06 16:06:16 -05:00
intc hw/intc: Vectored Interrupt Controller (VIC) 2022-04-26 08:17:05 -07:00
ipack ipack: Rename ipack_bus_new_inplace() to ipack_bus_init() 2021-09-30 13:42:10 +01:00
ipmi Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
isa hw/isa: Inline and remove one-line isa_init_irq() 2022-03-08 19:38:17 +01:00
kvm target/i386: always create kvmclock device 2020-09-30 19:11:36 +02:00
m68k hw/m68k/mcf: Add missing 'exec/hwaddr.h' header 2022-02-21 10:35:13 +01:00
mem nvdimm: Add realize, unrealize callbacks to NVDIMMDevice class 2022-02-18 08:34:13 +01:00
mips Replace TARGET_WORDS_BIGENDIAN 2022-04-06 10:50:37 +02:00
misc aspeed/hace: Support AST1030 HACE 2022-05-03 07:17:20 +02:00
net hw/net: Move MV88W8618 network device out of hw/arm/ directory 2022-01-20 11:47:52 +00:00
nubus nubus: add support for slot IRQs 2021-09-29 10:45:19 +02:00
nvram hw/nvram: Introduce Xilinx battery-backed ram 2021-09-30 13:42:10 +01:00
pci acpi: pcihp: pcie: set power on cap on parent slot 2022-03-06 05:08:23 -05:00
pci-bridge pci: expose TYPE_XIO3130_DOWNSTREAM name 2022-03-06 05:08:23 -05:00
pci-host ppc/pnv: Fix number of registers in the PCIe controller on POWER9 2022-04-04 08:49:06 +02:00
ppc ppc/xive: Update the state of the External interrupt signal 2022-05-05 15:36:17 -03:00
rdma qapi: introduce x-query-rdma QMP command 2021-11-02 15:55:14 +00:00
remote multi-process: perform device reset in the remote process 2021-02-10 09:23:28 +00:00
riscv hw/riscv: virt: Create a platform bus 2022-04-29 10:48:31 +10:00
rtc hw/rtc/mc146818rtc: QOM'ify IRQ number 2022-03-08 19:38:17 +01:00
rx Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
s390x s390x/css: fix PMCW invalid mask 2022-01-17 08:34:19 +01:00
scsi esp: convert ESPState pdma_cb from a function pointer to an integer 2022-03-09 09:29:10 +00:00
sd hw/sd: add nuvoton MMC 2021-11-02 14:14:55 -04:00
sensor hw/sensor: add Renesas raa228000 device 2022-03-08 18:46:48 +01:00
sh4 hw/intc/sh_intc: Inline and drop sh_intc_source() function 2021-10-30 18:39:37 +02:00
southbridge hw/isa/piix4: Resolve global instance variable 2022-03-08 19:38:05 +01:00
sparc hw: Replace anti-social QOM type names 2021-03-19 15:18:43 +01:00
ssi hw/ssi: Add Ibex SPI device model 2022-04-22 10:35:16 +10:00
timer aspeed/timer: Add AST1030 support 2022-05-02 17:03:03 +02:00
tricore hw/tricore: Remove unused and incorrect header 2022-02-21 10:36:50 +01:00
usb usb-storage: tag usb_msd_csw as packed struct 2021-11-02 17:24:18 +01:00
vfio vfio: Query and store the maximum number of possible DMA mappings 2021-07-08 15:54:45 -04:00
virtio Replace TARGET_WORDS_BIGENDIAN 2022-04-06 10:50:37 +02:00
watchdog aspeed/wdt: Add AST1030 support 2022-05-02 17:03:03 +02:00
xen Replace GCC_FMT_ATTR with G_GNUC_PRINTF 2022-03-22 14:40:51 +04:00
xtensa
boards.h hw: Add compat machines for 7.1 2022-04-20 09:36:24 +02:00
clock.h host-utils: add 128-bit quotient support to divu128/divs128 2021-10-27 17:10:00 -07:00
elf_ops.h hw/elf_ops: clear uninitialized segment space 2022-01-20 09:09:37 +01:00
fw-path-provider.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
hotplug.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
hw.h compiler.h: replace QEMU_NORETURN with G_NORETURN 2022-04-21 17:03:51 +04:00
ide.h hw/ide: Move MAX_IDE_DEVS define to hw/ide/internal.h 2020-03-17 12:22:36 -04:00
irq.h hw/core/irq: remove unused 'qemu_irq_split' function 2022-04-21 11:37:04 +01:00
loader-fit.h nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
loader.h semihosting/arm-compat: replace heuristic for softmmu SYS_HEAPINFO 2022-02-28 16:42:35 +00:00
nmi.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
or-irq.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
pcmcia.h Use OBJECT_DECLARE_TYPE when possible 2020-09-18 14:12:32 -04:00
platform-bus.h nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
ptimer.h ptimer: Add new ptimer_set_period_from_clock() function 2021-01-29 15:54:42 +00:00
qdev-clock.h clock: Add ClockEvent parameter to callbacks 2021-03-08 17:20:01 +00:00
qdev-core.h qdev-core.h: Fix wrongly named reference to TYPE_SPLIT_IRQ 2022-01-18 12:32:16 +01:00
qdev-dma.h
qdev-properties-system.h qdev: Reuse DEFINE_PROP in all DEFINE_PROP_* macros 2020-12-18 15:20:17 -05:00
qdev-properties.h qdev-properties: PropertyInfo: add realized_set_allowed field 2021-09-01 12:57:31 +02:00
register.h hw/core/register: Add more 64-bit utilities 2021-09-01 11:59:12 +10:00
registerfields.h hw/registerfields: Add FIELD_SEX<N> and FIELD_SDP<N> 2022-03-02 19:27:36 +00:00
resettable.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
stream.h hw/core/stream: Rename StreamSlave as StreamSink 2020-12-10 12:15:04 -05:00
sysbus.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
usb.h usb: drop usb_host_dev_is_scsi_storage hook 2021-07-09 18:21:33 +02:00
vmstate-if.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00