qemu-e2k/hw
Nicholas Piggin ccc5a4c5e1 spapr: Add SPAPR_CAP_AIL_MODE_3 for AIL mode 3 support for H_SET_MODE hcall
The behaviour of the Address Translation Mode on Interrupt resource is
not consistently supported by all CPU versions or all KVM versions: KVM
HV does not support mode 2, and does not support mode 3 on POWER7 or
early POWER9 processesors. KVM PR only supports mode 0. TCG supports all
modes (0, 2, 3) on CPUs with support for the corresonding LPCR[AIL] mode.
This leads to inconsistencies in guest behaviour and could cause problems
migrating guests.

This was not noticable for Linux guests for a long time because the
kernel only uses modes 0 and 3, and it used to consider AIL-3 to be
advisory in that it would always keep the AIL-0 vectors around, so it
did not matter whether or not interrupts were delivered according to
the AIL mode. Recent Linux guests depend on AIL mode 3 working as
specified in order to support the SCV facility interrupt. If AIL-3 can
not be provided, then H_SET_MODE must return an error to Linux so it can
disable the SCV facility (failure to do so can lead to userspace being
able to crash the guest kernel).

Add the ail-mode-3 capability to specify that AIL-3 is supported. AIL-0
is implied as the baseline, and AIL-2 is no longer supported by spapr.
AIL-2 is not known to be used by any software, but support in TCG could
be restored with an ail-mode-2 capability quite easily if a regression
is reported.

Modify the H_SET_MODE Address Translation Mode on Interrupt resource
handler to check capabilities and correctly return error if not
supported.

KVM has a cap to advertise support for AIL-3.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20230515160216.394612-1-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2023-05-28 07:13:54 -03:00
..
9pfs 9pfs/xen: Fix segfault on shutdown 2023-05-16 16:21:54 +02:00
acpi hw/pci-bridge: Make PCIe and CXL PXB Devices inherit from TYPE_PXB_DEV 2023-04-24 22:56:55 -04:00
adc
alpha hw/alpha: Use MachineClass->default_nic in the alpha machine 2023-05-26 09:10:49 +02:00
arm hw/arm: Use MachineClass->default_nic in the sbsa-ref machine 2023-05-26 09:10:49 +02:00
audio hw/audio/via-ac97: Basic implementation of audio playback 2023-03-08 00:37:48 +01:00
avr
block virtio-blk: add some trace events for zoned emulation 2023-05-15 08:18:10 -04:00
char hw/char/parallel: Move TYPE_ISA_PARALLEL to the header file 2023-05-22 09:44:48 +02:00
core machine: do not crash if default RAM backend name has been stolen 2023-05-26 09:37:04 +02:00
cpu
cris
cxl hw/cxl: Introduce cxl_device_get_timestamp() utility function 2023-05-19 10:30:46 -04:00
display hw/display/sm501: Remove unneeded increment from loop 2023-05-05 12:34:22 -03:00
dma replace TABs with spaces 2023-03-20 12:43:50 +01:00
gpio replace TABs with spaces 2023-03-20 12:43:50 +01:00
hppa hw/hppa: Use MachineClass->default_nic in the hppa machine 2023-05-26 09:10:49 +02:00
hyperv win32: replace closesocket() with close() wrapper 2023-03-13 15:39:31 +04:00
i2c hw/i2c/allwinner-i2c: Fix subclassing of TYPE_AW_I2C_SUN6I 2023-04-11 14:13:29 +01:00
i386 hw/i386: Ignore the default parallel port if it has not been compiled into QEMU 2023-05-22 09:44:48 +02:00
ide hw: replace most qemu_bh_new calls with qemu_bh_new_guarded 2023-04-28 11:31:54 +02:00
input replace TABs with spaces 2023-03-20 12:43:50 +01:00
intc hw/intc: Add NULL pointer check on LoongArch ipi device 2023-05-15 19:09:33 +08:00
ipack
ipmi
isa hw/char/parallel: Move TYPE_ISA_PARALLEL to the header file 2023-05-22 09:44:48 +02:00
loongarch hw/loongarch64: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
m68k hw: Add compat machines for 8.1 2023-04-21 04:25:52 -04:00
mem hw/cxl: Multi-Region CXL Type-3 Devices (Volatile and Persistent) 2023-05-19 01:36:09 -04:00
microblaze hw/char/xilinx_uartlite: Open-code xilinx_uartlite_create() 2023-02-27 13:27:05 +00:00
mips hw/mips: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
misc hw/arm/bcm2835_property: Implement "get command line" message 2023-05-02 15:47:40 +01:00
net rtl8139: fix large_send_mss divide-by-zero 2023-05-23 15:20:15 +08:00
nios2
nubus hw/nubus/nubus-device: Fix memory leak in nubus_device_realize 2023-02-27 22:29:01 +01:00
nvme hw: replace most qemu_bh_new calls with qemu_bh_new_guarded 2023-04-28 11:31:54 +02:00
nvram aspeed queue: 2023-03-03 17:11:22 +00:00
openrisc *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
pci hw/pci: Disable PCI_ERR_UNCOR_MASK register for machine type < 8.0 2023-05-19 10:30:46 -04:00
pci-bridge hw/pci-bridge: make building pcie-to-pci bridge configurable 2023-05-19 10:30:46 -04:00
pci-host hw/pci-host/pam: Make init_pam() usage more readable 2023-05-19 10:30:46 -04:00
pcmcia
ppc spapr: Add SPAPR_CAP_AIL_MODE_3 for AIL mode 3 support for H_SET_MODE hcall 2023-05-28 07:13:54 -03:00
rdma hw/rdma: VMW_PVRDMA should depend on VMXNET3_PCI 2023-04-28 08:05:37 +02:00
remote Drop duplicate #include 2023-02-08 07:28:05 +01:00
riscv hw/riscv: Add signature dump function for spike to run ACT tests 2023-05-05 10:49:50 +10:00
rtc replace TABs with spaces 2023-03-20 12:43:50 +01:00
rx
s390x hw/s390x: Use MachineClass->default_nic in the s390x machine 2023-05-22 09:44:48 +02:00
scsi hw/scsi/lsi53c895a: Fix reentrancy issues in the LSI controller (CVE-2023-0330) 2023-05-26 09:37:04 +02:00
sd hw/sd/allwinner-sdhost: Correctly byteswap descriptor fields 2023-05-02 15:47:41 +01:00
sensor Do not include hw/hw.h if it is not necessary 2023-02-27 09:15:38 +01:00
sh4 hw/sh4: Use MachineClass->default_nic in the sh4 r2d machine 2023-05-22 09:44:48 +02:00
smbios hw/smbios: fix field corruption in type 4 table 2023-03-02 03:10:46 -05:00
sparc
sparc64 hw/sparc64/sun4u: Use MachineClass->default_nic and MachineClass->no_parallel 2023-05-22 09:44:48 +02:00
ssi hw/ssi: Fix Linux driver init issue with xilinx_spi 2023-04-03 16:12:30 +01:00
timer hw/timer/imx_epit: fix limit check 2023-04-20 10:21:14 +01:00
tpm tpm: Add support for TPM device over I2C bus 2023-04-20 08:17:15 -04:00
tricore
usb usb/ohci: Set pad to 0 after frame update 2023-05-25 10:18:33 +02:00
vfio vfio/pci: Fix a use-after-free issue 2023-05-24 09:21:22 +02:00
virtio virtio: qmp: fix memory leak 2023-05-26 12:34:17 +02:00
watchdog hw/watchdog: Allwinner WDT emulation for system reset 2023-04-20 10:21:13 +01:00
xen pci: avoid accessing slot_reserved_mask directly outside of pci.c 2023-04-21 04:25:52 -04:00
xenpv hw/xenpv: Initialize Xen backend operations 2023-03-24 14:52:14 +00:00
xtensa hw/xtensa: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
Kconfig xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation 2023-03-01 08:22:49 +00:00
meson.build