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Peter Maydell 2b39abb2d6 hw/arm/boot: Set SME and SVE EL3 vector lengths when booting kernel 
When we direct boot a kernel on a CPU which emulates EL3, we need
to set up the EL3 system registers as the Linux kernel documentation
specifies:
 https://www.kernel.org/doc/Documentation/arm64/booting.rst

For SVE and SME this includes:
    - ZCR_EL3.LEN must be initialised to the same value for all CPUs the
      kernel is executed on.
    - SMCR_EL3.LEN must be initialised to the same value for all CPUs the
      kernel will execute on.

Although we are technically compliant with this, the "same value" we
currently use by default is the reset value of 0.  This will end up
forcing the guest kernel's SVE and SME vector length to be only the
smallest supported length.

Initialize the vector length fields to their maximum possible value,
which is 0xf. If the implementation doesn't actually support that
vector length then the effective vector length will be constrained
down to the maximum supported value at point of use.

This allows the guest to use all the vector lengths the emulated CPU
supports (by programming the _EL2 and _EL1 versions of these
registers.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20221027140207.413084-2-peter.maydell@linaro.org
2022-11-04 10:58:58 +00:00
..
9pfs Pull request 2022-10-25 11:37:17 -04:00
acpi hw/acpi: Add ospm_status hook implementation for acpi-ged 2022-09-22 16:38:28 +01:00
adc hw/adc: Make adci[*] R/W in NPCM7XX ADC 2022-07-18 13:20:14 +01:00
alpha hw: Remove unused MAX_IDE_BUS define 2022-10-31 11:32:07 +01:00
arm hw/arm/boot: Set SME and SVE EL3 vector lengths when booting kernel 2022-11-04 10:58:58 +00:00
audio hw/audio/cs4231a: Const'ify global tables 2022-06-11 11:44:50 +02:00
avr Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
block ppc patch queue for 2022-10-29: 2022-10-31 06:28:43 -04:00
char Drop useless casts from g_malloc() & friends to pointer 2022-10-22 23:15:40 +02:00
core Pull request 2022-10-30 15:07:25 -04:00
cpu
cris
cxl hw/cxl: Correctly handle variable sized mailbox input payloads. 2022-08-17 13:08:11 -04:00
display Drop useless casts from g_malloc() & friends to pointer 2022-10-22 23:15:40 +02:00
dma treewide: Remove the unnecessary space before semicolon 2022-10-24 13:41:10 +02:00
gpio hw/gpio/meson: Introduce dedicated config switch for hw/gpio/mpc8xxx 2022-10-17 16:15:09 -03:00
hppa hw: Remove unused MAX_IDE_BUS define 2022-10-31 11:32:07 +01:00
hyperv hw/hyperv/hyperv.c: Use device_cold_reset() instead of device_legacy_reset() 2022-10-27 10:27:23 +01:00
i2c hw/i2c/aspeed: Fix old reg slave receive 2022-10-24 11:20:15 +02:00
i386 * bug fixes 2022-11-03 10:54:37 -04:00
ide hw/ppc/mac.h: Rename to include/hw/nvram/mac_nvram.h 2022-10-31 18:48:23 +00:00
input pckbd: remove legacy i8042_mm_init() function 2022-07-18 19:28:46 +01:00
intc hw/ppc/mac.h: Rename to include/hw/nvram/mac_nvram.h 2022-10-31 18:48:23 +00:00
ipack qbus: Rename qbus_create_inplace() to qbus_init() 2021-09-30 13:42:10 +01:00
ipmi ipmi:smbus: Add a check around a memcpy 2022-08-01 06:40:50 -05:00
isa hw/isa/piix4: Move pci_ide_create_devs() call to board code 2022-10-31 11:32:07 +01:00
loongarch hw/arm, loongarch: Move load_image_to_fw_cfg() to common location 2022-10-14 14:29:50 +10:00
m68k m68k/q800: do not re-randomize RNG seed on snapshot load 2022-10-27 11:34:31 +01:00
mem hw/mem/nvdimm: fix error message for 'unarmed' flag 2022-10-24 12:38:38 +02:00
microblaze hw/microblaze: pass random seed to fdt 2022-09-21 19:59:56 +02:00
mips hw/mips/malta: Use bootloader helper to set BAR registers 2022-10-31 11:32:56 +01:00
misc mac_nvram: Use NVRAM_SIZE constant 2022-10-31 18:48:23 +00:00
net * Fix and test the VISTR instruction on s390x 2022-10-31 06:19:54 -04:00
nios2 hw/nios2: set machine->fdt in nios2_load_dtb() 2022-10-17 16:15:10 -03:00
nubus qbus: Rename qbus_create_inplace() to qbus_init() 2021-09-30 13:42:10 +01:00
nvme hw/nvme: Abort copy command when format is one while pif 2022-11-02 09:23:05 +01:00
nvram hw/ppc/mac.h: Rename to include/hw/nvram/mac_nvram.h 2022-10-31 18:48:23 +00:00
openrisc openrisc: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
pci trivial patches pull request 20220629 2022-06-30 04:49:40 +05:30
pci-bridge pci-bridge/cxl_downstream: Add a CXL switch downstream port 2022-06-16 12:54:57 -04:00
pci-host hw/ppc/mac.h: Rename to include/hw/nvram/mac_nvram.h 2022-10-31 18:48:23 +00:00
pcmcia
ppc mac_newworld: Turn CORE99_VIA_CONFIG defines into an enum 2022-10-31 18:48:23 +00:00
rdma hw/pvrdma: Some cosmetic fixes 2022-04-26 12:25:14 +02:00
remote Use g_new() & friends where that makes obvious sense 2022-10-04 00:10:11 +02:00
riscv riscv: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
rtc goldfish_rtc: Add big-endian property 2022-09-04 07:02:56 +01:00
rx rx: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
s390x * Fix and test the VISTR instruction on s390x 2022-10-31 06:19:54 -04:00
scsi hw/scsi/vmw_pvscsi.c: Use device_cold_reset() to reset SCSI devices 2022-10-18 13:58:04 +02:00
sd hw/sd/sdhci: Rename ESDHC_* defines to USDHC_* 2022-10-28 13:26:20 -03:00
sensor hw/sensor: Add Renesas ISL69259 device model 2022-07-14 16:24:38 +02:00
sh4 Use g_new() & friends where that makes obvious sense 2022-03-21 15:44:44 +01:00
smbios hw/smbios: support for type 8 (port connector) 2022-10-09 16:38:45 -04:00
sparc machine: make memory-backend a link property 2022-05-12 12:29:44 +02:00
sparc64 hw: Remove unused MAX_IDE_BUS define 2022-10-31 11:32:07 +01:00
ssi aspeed/smc: Cache AspeedSMCClass 2022-10-24 11:20:15 +02:00
timer target/imx: reload cmp timer outside of the reload ptimer transaction 2022-10-27 10:27:23 +01:00
tpm tpm_crb: Avoid backend startup just before shutdown under Xen 2022-09-09 17:55:59 -04:00
tricore hw/tricore: fix inclusion of tricore_testboard 2021-07-20 20:10:21 +02:00
usb hw/usb: dev-mtp: Use g_mkdir() 2022-10-31 20:37:58 +00:00
vfio vfio/common: Fix vfio_iommu_type1_info use after free 2022-09-27 14:26:42 -06:00
virtio Hi, 2022-10-30 18:31:59 -04:00
watchdog watchdog: remove -watchdog option 2022-09-29 11:40:28 +02:00
xen hw/xen: set pci Atomic Ops requests for passthrough device 2022-09-27 14:23:23 +01:00
xenpv Warn user if the vga flag is passed but no vga device is created 2022-05-09 08:21:14 +02:00
xtensa hw/xtensa: fix reset value of MIROUT register of MX PIC 2022-05-06 15:27:40 -07:00
Kconfig hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00
meson.build hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00