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2b39abb2d6
qemu/hw/arm
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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
..
allwinner-a10.c arm/allwinner-a10: replace snprintf() with g_strdup_printf() 2022-04-21 17:03:51 +04:00
allwinner-h3.c block: Change blk_{pread,pwrite}() param order 2022-07-12 12:14:56 +02:00
armsse.c arm: Remove system_clock_scale global 2021-09-01 11:08:21 +01:00
armv7m.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
aspeed_ast10x0.c aspeed: Refactor UART init for multi-SoC machines 2022-07-14 16:24:38 +02:00
aspeed_ast2600.c ast2600: Drop NEON from the CPU features 2022-10-24 11:20:15 +02:00
aspeed_soc.c aspeed: Refactor UART init for multi-SoC machines 2022-07-14 16:24:38 +02:00
aspeed.c reset: allow registering handlers that aren't called by snapshot loading 2022-10-27 11:34:31 +01:00
bcm2835_peripherals.c Align Raspberry Pi DMA interrupts with Linux DTS 2022-07-18 13:25:13 +01:00
bcm2836.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
boot.c hw/arm/boot: Set SME and SVE EL3 vector lengths when booting kernel 2022-11-04 10:58:58 +00:00
collie.c
cubieboard.c hw: Replace trivial drive_get_next() by drive_get() 2021-12-15 08:38:16 +01:00
digic_boards.c hw/arm: Don't include qemu-common.h unnecessarily 2021-12-15 10:35:26 +00:00
digic.c arm/digic: replace snprintf() with g_strdup_printf() 2022-04-21 17:03:51 +04:00
exynos4_boards.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
exynos4210.c hw/arm/exynos4210: Drop Exynos4210Irq struct 2022-04-21 11:37:04 +01:00
fby35.c aspeed/fby35: Fix owner of the BMC RAM memory region 2022-08-01 15:24:15 +02:00
fsl-imx6.c
fsl-imx6ul.c hw/arm: imx: Don't enable PSCI conduit when booting guest in EL3 2022-02-08 10:56:27 +00:00
fsl-imx7.c hw/arm: imx: Don't enable PSCI conduit when booting guest in EL3 2022-02-08 10:56:27 +00:00
fsl-imx25.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
fsl-imx31.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
gumstix.c
highbank.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
imx25_pdk.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
integratorcp.c hw: Replace trivial drive_get_next() by drive_get() 2021-12-15 08:38:16 +01:00
Kconfig hw/arm/aspeed: Add MAX31785 Fan controllers 2022-06-30 09:21:13 +02:00
kzm.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
mainstone.c qtest: delete superfluous inclusions of qtest.h 2021-03-09 06:03:53 +01:00
mcimx6ul-evk.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
mcimx7d-sabre.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
meson.build aspeed: Add fby35 skeleton 2022-07-14 16:24:38 +02:00
microbit.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
mps2-tz.c reset: allow registering handlers that aren't called by snapshot loading 2022-10-27 11:34:31 +01:00
mps2.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
msf2-soc.c arm: Remove system_clock_scale global 2021-09-01 11:08:21 +01:00
msf2-som.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
musca.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
musicpal.c ptimer: Rename PTIMER_POLICY_DEFAULT to PTIMER_POLICY_LEGACY 2022-05-19 16:19:03 +01:00
netduino2.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
netduinoplus2.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
npcm7xx_boards.c hw/arm: Use bit fields for NPCM7XX PWRON STRAPs 2022-04-21 11:37:05 +01:00
npcm7xx.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
nrf51_soc.c arm: Remove system_clock_scale global 2021-09-01 11:08:21 +01:00
nseries.c Drop useless casts from g_malloc() & friends to pointer 2022-10-22 23:15:40 +02:00
omap1.c exec/exec-all: Move 'qemu/log.h' include in units requiring it 2022-02-21 10:18:06 +01:00
omap2.c trivial: Fix duplicated words 2022-08-01 11:58:02 +02:00
omap_sx1.c
orangepi.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
palm.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
pxa2xx_gpio.c
pxa2xx_pic.c target/arm: Replace sentinels with ARRAY_SIZE in cpregs.h 2022-05-05 09:35:50 +01:00
pxa2xx.c hw/i2c: add asynchronous send 2022-06-30 09:21:14 +02:00
raspi.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
realview.c hw/arm/realview: replace 'qemu_split_irq' with 'TYPE_SPLIT_IRQ' 2022-04-21 11:37:04 +01:00
sabrelite.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
sbsa-ref.c hw/arm: add versioning to sbsa-ref machine DT 2022-05-09 11:47:54 +01:00
smmu-common.c dma: Let dma_memory_read/write() take MemTxAttrs argument 2021-12-30 17:16:32 +01:00
smmu-internal.h hw/arm/smmuv3: Fix SMMU_CMD_CFGI_STE_RANGE handling 2021-03-12 12:40:10 +00:00
smmuv3-internal.h hw/arm/smmuv3: Advertise support for SMMUv3.2-BBML2 2022-04-28 13:59:23 +01:00
smmuv3.c hw/arm/smmuv3: Advertise support for SMMUv3.2-BBML2 2022-04-28 13:59:23 +01:00
spitz.c hw/i2c: Rename i2c_set_slave_address() -> i2c_slave_set_address() 2021-07-08 14:15:01 -05:00
stellaris.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
stm32f100_soc.c hw/arm/stm32f100: Wire up sysclk and refclk 2021-09-01 11:08:19 +01:00
stm32f205_soc.c hw/arm/stm32f205: Wire up sysclk and refclk 2021-09-01 11:08:19 +01:00
stm32f405_soc.c hw/arm: Don't include qemu-common.h unnecessarily 2021-12-15 10:35:26 +00:00
stm32vldiscovery.c target/arm: Make boards pass base address to armv7m_load_kernel() 2022-09-14 11:19:40 +01:00
strongarm.c rtc: Move RTC function prototypes to their own header 2022-01-28 14:29:46 +00:00
strongarm.h
tosa.c
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h
versatilepb.c hw/arm/versatilepb hw/arm/vexpress: Replace drive_get_next() by drive_get() 2021-12-15 08:38:16 +01:00
vexpress.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
virt-acpi-build.c acpi: arm/virt: build_gtdt: fix invalid 64-bit physical addresses 2022-10-09 16:38:45 -04:00
virt.c hw/arm/virt: Fix devicetree warnings about the virtio-iommu node 2022-10-27 10:27:23 +01:00
xilinx_zynq.c hw/arm/boot: Drop nb_cpus field from arm_boot_info 2022-02-08 10:56:28 +00:00
xlnx-versal-virt.c hw/core: Move the ARM sysbus-fdt to core 2022-04-29 10:48:26 +10:00
xlnx-versal.c hw/arm: versal: Connect the CRL 2022-04-21 11:37:03 +01:00
xlnx-zcu102.c hw/arm/xlnx-zcu102: Don't enable PSCI conduit when booting guest in EL3 2022-02-08 10:56:27 +00:00
xlnx-zynqmp.c hw/arm/xlnx-zynqmp: Connect ZynqMP's USB controllers 2022-09-29 17:40:01 +01:00
z2.c hw/arm: Constify VMStateDescription 2021-05-02 17:24:50 +02:00