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2023-04-20hw/arm: Add WDT to Allwinner-H3 and Orangepi-PCStrahinja Jankovic
This patch adds WDT to Allwinner-H3 and Orangepi-PC. WDT is added as an overlay to the Timer module memory area. Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com> Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-id: 20230326202256.22980-4-strahinja.p.jankovic@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-04-20hw/arm: Add WDT to Allwinner-A10 and CubieboardStrahinja Jankovic
This patch adds WDT to Allwinner-A10 and Cubieboard. WDT is added as an overlay to the Timer module memory map. Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com> Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-id: 20230326202256.22980-3-strahinja.p.jankovic@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-21docs/system/arm/cpu-features.rst: Fix formattingPeter Maydell
The markup for the Arm CPU feature documentation is incorrect, and results in the HTML not rendering correctly -- the first line of each description is rendered in boldface as if it were part of the option name. Reformat to match the styling used in cpu-models-x86.rst.inc. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1479 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20230316105808.1414003-1-peter.maydell@linaro.org Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2023-03-02hw/arm/aspeed: Adding new machine Tiogapass in QEMUKarthikeyan Pasupathi
This patch support Tiogapass in QEMU environment. and introduced EEPROM BMC FRU data support "add tiogapass_bmc_fruid data" along with the machine support. Signed-off-by: Karthikeyan Pasupathi <pkarthikeyan1509@gmail.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> [ clg: - commit log topic update - checkpatch issues - Documentation update ] Message-Id: <20230216184342.253868-1-pkarthikeyan1509@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-03-02hw/arm/aspeed: Adding new machine Yosemitev2 in QEMUKarthikeyan Pasupathi
This patch support Yosemitev2 in QEMU environment. and introduced EEPROM BMC FRU data support "add fbyv2_bmc_fruid data" along with the machine support. Signed-off-by: Karthikeyan Pasupathi <pkarthikeyan1509@gmail.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> [ clg: - commit log topic update - Documentation update ] Message-Id: <20230216133326.216017-1-pkarthikeyan1509@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-02-16hw/arm: Attach PSPI module to NPCM7XX SoCHao Wu
Signed-off-by: Hao Wu <wuhaotsh@google.com> Reviewed-by: Titus Rwantare <titusr@google.com> Reviewed-by: Philippe Mathieu-Daude <philmd@linaro.org> Message-id: 20230208235433.3989937-4-wuhaotsh@google.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-03target/arm: Enable FEAT_FGT on '-cpu max'Peter Maydell
Update the ID registers for TCG's '-cpu max' to report the presence of FEAT_FGT Fine-Grained Traps support. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Fuad Tabba <tabba@google.com> Message-id: 20230130182459.3309057-24-peter.maydell@linaro.org Message-id: 20230127175507.2895013-24-peter.maydell@linaro.org
2023-02-02docs: add a new section to outline emulation supportAlex Bennée
This affects both system and user mode emulation so we should probably list it up front. Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230124180127.1881110-21-alex.bennee@linaro.org>
2023-01-12{hw/i2c,docs/system/arm}: Allwinner TWI/I2C EmulationStrahinja Jankovic
This patch implements Allwinner TWI/I2C controller emulation. Only master-mode functionality is implemented. The SPL boot for Cubieboard expects AXP209 PMIC on TWI0/I2C0 bus, so this is first part enabling the TWI/I2C bus operation. Since both Allwinner A10 and H3 use the same module, it is added for both boards. Docs are also updated for Cubieboard and Orangepi-PC board to indicate I2C availability. Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com> Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-id: 20221226220303.14420-4-strahinja.p.jankovic@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-01-12hw/arm: Add Olimex H405Felipe Balbi
Olimex makes a series of low-cost STM32 boards. This commit introduces the minimum setup to support SMT32-H405. See [1] for details [1] https://www.olimex.com/Products/ARM/ST/STM32-H405/ Signed-off-by: Felipe Balbi <balbi@kernel.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20221230145733.200496-3-balbi@kernel.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-12-15target/arm: Report FEAT_EVT for TCG '-cpu max'Peter Maydell
Update the ID registers for TCG's '-cpu max' to report the FEAT_EVT Enhanced Virtualization Traps support. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-12-15target/arm: Add Cortex-A55 CPUTimofey Kutergin
The Cortex-A55 is one of the newer armv8.2+ CPUs; in particular it supports the Privileged Access Never (PAN) feature. Add a model of this CPU, so you can use a CPU type on the virt board that models a specific real hardware CPU, rather than having to use the QEMU-specific "max" CPU type. Signed-off-by: Timofey Kutergin <tkutergin@gmail.com> Message-id: 20221121150819.2782817-1-tkutergin@gmail.com [PMM: tweaked commit message] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-12-15hw/arm/virt: Add properties to disable high memory regionsGavin Shan
The 3 high memory regions are usually enabled by default, but they may be not used. For example, VIRT_HIGH_GIC_REDIST2 isn't needed by GICv2. This leads to waste in the PA space. Add properties ("highmem-redists", "highmem-ecam", "highmem-mmio") to allow users selectively disable them if needed. After that, the high memory region for GICv3 or GICv4 redistributor can be disabled by user, the number of maximal supported CPUs needs to be calculated based on 'vms->highmem_redists'. The follow-up error message is also improved to indicate if the high memory region for GICv3 and GICv4 has been enabled or not. Suggested-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Message-id: 20221029224307.138822-8-gshan@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-12-15hw/arm/virt: Add 'compact-highmem' propertyGavin Shan
After the improvement to high memory region address assignment is applied, the memory layout can be changed, introducing possible migration breakage. For example, VIRT_HIGH_PCIE_MMIO memory region is disabled or enabled when the optimization is applied or not, with the following configuration. The configuration is only achievable by modifying the source code until more properties are added to allow users selectively disable those high memory regions. pa_bits = 40; vms->highmem_redists = false; vms->highmem_ecam = false; vms->highmem_mmio = true; # qemu-system-aarch64 -accel kvm -cpu host \ -machine virt-7.2,compact-highmem={on, off} \ -m 4G,maxmem=511G -monitor stdio Region compact-highmem=off compact-highmem=on ---------------------------------------------------------------- MEM [1GB 512GB] [1GB 512GB] HIGH_GIC_REDISTS2 [512GB 512GB+64MB] [disabled] HIGH_PCIE_ECAM [512GB+256MB 512GB+512MB] [disabled] HIGH_PCIE_MMIO [disabled] [512GB 1TB] In order to keep backwords compatibility, we need to disable the optimization on machine, which is virt-7.1 or ealier than it. It means the optimization is enabled by default from virt-7.2. Besides, 'compact-highmem' property is added so that the optimization can be explicitly enabled or disabled on all machine types by users. Signed-off-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Tested-by: Zhenyu Zhang <zhenyzha@redhat.com> Message-id: 20221029224307.138822-7-gshan@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-11-05Fix some typos in documentation and commentsStefan Weil
Most of them were found and fixed using codespell. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20221030105944.311940-1-sw@weilnetz.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-27target/arm: Implement FEAT_HAFDBS, access flag portionRichard Henderson
Perform the atomic update for hardware management of the access flag. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20221024051851.3074715-13-richard.henderson@linaro.org [PMM: Fix accidental PROT_WRITE to PAGE_WRITE; add missing main-loop.h include] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-10-27target/arm: Implement FEAT_E0PDPeter Maydell
FEAT_E0PD adds new bits E0PD0 and E0PD1 to TCR_EL1, which allow the OS to forbid EL0 access to half of the address space. Since this is an EL0-specific variation on the existing TCR_ELx.{EPD0,EPD1}, we can implement it entirely in aa64_va_parameters(). This requires moving the existing regime_is_user() to internals.h so that the code in helper.c can get at it. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20221021160131.3531787-1-peter.maydell@linaro.org
2022-10-10docs/system/arm/emulation.rst: Report FEAT_GTG supportPeter Maydell
FEAT_GTG is a change tho the ID register ID_AA64MMFR0_EL1 so that it can report a different set of supported granule (page) sizes for stage 1 and stage 2 translation tables. As of commit c20281b2a5048 we already report the granule sizes that way for '-cpu max', and now we also correctly make attempts to use unimplemented granule sizes fail, so we can report the support of the feature in the documentation. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20221003162315.2833797-4-peter.maydell@linaro.org
2022-10-10docs/nuvoton: Update URL for imagesJoel Stanley
openpower.xyz was retired some time ago. The OpenBMC Jenkins is where images can be found these days. Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Hao Wu <wuhaotsh@google.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20221004050042.22681-1-joel@jms.id.au Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-09-14target/arm: Report FEAT_PMUv3p5 for TCG '-cpu max'Peter Maydell
Update the ID registers for TCG's '-cpu max' to report a FEAT_PMUv3p5 compliant PMU. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220822132358.3524971-11-peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-14target/arm: Advertise FEAT_ETS for '-cpu max'Peter Maydell
The architectural feature FEAT_ETS (Enhanced Translation Synchronization) is a set of tightened guarantees about memory ordering involving translation table walks: * if memory access RW1 is ordered-before memory access RW2 then it is also ordered-before any translation table walk generated by RW2 that generates a translation fault, address size fault or access fault * TLB maintenance on non-exec-permission translations is guaranteed complete after a DSB (ie it does not need the context synchronization event that you have to have if you don’t have FEAT_ETS) For QEMU’s implementation we don’t reorder translation table walk accesses, and we guarantee to finish the TLB maintenance as soon as the TLB op is done (the tlb_flush functions will complete at the end of the TLB, and TLB ops always end the TB because they’re sysreg writes). So we’re already compliant and all we need to do is say so in the ID registers for the 'max' CPU. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220819110052.2942289-6-peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-14target/arm: Add cortex-a35Hao Wu
Add cortex A35 core and enable it for virt board. Signed-off-by: Hao Wu <wuhaotsh@google.com> Reviewed-by: Joe Komlodi <komlodi@google.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20220819002015.1663247-1-wuhaotsh@google.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-08-01misc: fix commonly doubled up wordsDaniel P. Berrangé
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220707163720.1421716-5-berrange@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-07-14docs: aspeed: Minor updatesCédric Le Goater
Some more controllers have been modeled recently. Reflect that in the list of supported devices. New machines were also added. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Peter Delevoryas <peter@pjd.dev> Reviewed-by: Joel Stanley <joel@jms.id.au> Message-Id: <20220706172131.809255-1-clg@kaod.org> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-07-14docs: aspeed: Add fby35 multi-SoC machine sectionPeter Delevoryas
Signed-off-by: Peter Delevoryas <peter@pjd.dev> Reviewed-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Cédric Le Goater <clg@kaod.org> [ clg: - fixed URL links - Moved Facebook Yosemite section at the end of the file ] Message-Id: <20220705191400.41632-10-peter@pjd.dev> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-07-11target/arm: Enable SME for -cpu maxRichard Henderson
Note that SME remains effectively disabled for user-only, because we do not yet set CPACR_EL1.SMEN. This needs to wait until the kernel ABI is implemented. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220708151540.18136-33-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-07hw/arm/virt: dt: add rng-seed propertyJason A. Donenfeld
In 60592cfed2 ("hw/arm/virt: dt: add kaslr-seed property"), the kaslr-seed property was added, but the equally as important rng-seed property was forgotten about, which has identical semantics for a similar purpose. This commit implements it in exactly the same way as kaslr-seed. It then changes the name of the disabling option to reflect that this has more to do with randomness vs determinism, rather than something particular about kaslr. Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> [PMM: added deprecated.rst section for the deprecation] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-06-27target/arm: Add cpu properties for SMERichard Henderson
Mirror the properties for SVE. The main difference is that any arbitrary set of powers of 2 may be supported, and not the stricter constraints that apply to SVE. Include a property to control FEAT_SME_FA64, as failing to restrict the runtime to the proper subset of insns could be a major point for bugs. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20220620175235.60881-18-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-06-08target/arm: Implement FEAT_DoubleFaultPeter Maydell
The FEAT_DoubleFault extension adds the following: * All external aborts on instruction fetches and translation table walks for instruction fetches must be synchronous. For QEMU this is already true. * SCR_EL3 has a new bit NMEA which disables the masking of SError interrupts by PSTATE.A when the SError interrupt is taken to EL3. For QEMU we only need to make the bit writable, because we have no sources of SError interrupts. * SCR_EL3 has a new bit EASE which causes synchronous external aborts taken to EL3 to be taken at the same entry point as SError. (Note that this does not mean that they are SErrors for purposes of PSTATE.A masking or that the syndrome register reports them as SErrors: it just means that the vector offset is different.) * The existing SCTLR_EL3.IESB has an effective value of 1 when SCR_EL3.NMEA is 1. For QEMU this is a no-op because we don't need different behaviour based on IESB (we don't need to do anything to ensure that error exceptions are synchronized). So for QEMU the things we need to change are: * Make SCR_EL3.{NMEA,EASE} writable * When taking a synchronous external abort at EL3, adjust the vector entry point if SCR_EL3.EASE is set * Advertise the feature in the ID registers Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220531151431.949322-1-peter.maydell@linaro.org
2022-06-08target/arm: Declare support for FEAT_RASv1p1Peter Maydell
The architectural feature RASv1p1 introduces the following new features: * new registers ERXPFGCDN_EL1, ERXPFGCTL_EL1 and ERXPFGF_EL1 * new bits in the fine-grained trap registers that control traps for these new registers * new trap bits HCR_EL2.FIEN and SCR_EL3.FIEN that control traps for ERXPFGCDN_EL1, ERXPFGCTL_EL1, ERXPFGP_EL1 * a larger number of the ERXMISC<n>_EL1 registers * the format of ERR<n>STATUS registers changes The architecture permits that if ERRIDR_EL1.NUM is 0 (as it is for QEMU) then all these new registers may UNDEF, and the HCR_EL2.FIEN and SCR_EL3.FIEN bits may be RES0. We don't have any ERR<n>STATUS registers (again, because ERRIDR_EL1.NUM is 0). QEMU does not yet implement the fine-grained-trap extension. So there is nothing we need to implement to be compliant with the feature spec. Make the 'max' CPU report the feature in its ID registers, and document it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220531114258.855804-1-peter.maydell@linaro.org
2022-05-30docs/system/arm: Add FEAT_HCX to list of emulated featuresPeter Maydell
In commit 5814d587fe861fe9 we added support for emulating FEAT_HCX (Support for the HCRX_EL2 register). However we forgot to add it to the list in emulated.rst. Correct the omission. Fixes: 5814d587fe861fe9 ("target/arm: Enable FEAT_HCX for -cpu max") Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220520084320.424166-1-peter.maydell@linaro.org
2022-05-25docs: aspeed: Add fby35 boardPeter Delevoryas
Add fby35 to the list of Aspeed boards. Signed-off-by: Peter Delevoryas <pdel@fb.com> Message-Id: <20220506193354.990532-2-pdel@fb.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-05-25docs: add minibmc section in aspeed documentJamin Lin
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20220506031521.13254-2-jamin_lin@aspeedtech.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-05-19target/arm: Implement FEAT_IDSTPeter Maydell
The Armv8.4 feature FEAT_IDST specifies that exceptions generated by read accesses to the feature ID space should report a syndrome code of 0x18 (EC_SYSTEMREGISTERTRAP) rather than 0x00 (EC_UNCATEGORIZED). The feature ID space is defined to be: op0 == 3, op1 == {0,1,3}, CRn == 0, CRm == {0-7}, op2 == {0-7} In our implementation we might return the EC_UNCATEGORIZED syndrome value for a system register access in four cases: * no reginfo struct in the hashtable * cp_access_ok() fails (ie ri->access doesn't permit the access) * ri->accessfn returns CP_ACCESS_TRAP_UNCATEGORIZED at runtime * ri->type includes ARM_CP_RAISES_EXC, and the readfn raises an UNDEF exception at runtime We have very few regdefs that set ARM_CP_RAISES_EXC, and none of them are in the feature ID space. (In the unlikely event that any are added in future they would need to take care of setting the correct syndrome themselves.) This patch deals with the other three cases, and enables FEAT_IDST for AArch64 -cpu max. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220509155457.3560724-1-peter.maydell@linaro.org
2022-05-19target/arm: Enable FEAT_S2FWB for -cpu maxPeter Maydell
Enable the FEAT_S2FWB for -cpu max. Since FEAT_S2FWB requires that CLIDR_EL1.{LoUU,LoUIS} are zero, we explicitly squash these (the inherited CLIDR_EL1 value from the Cortex-A57 has them as 1). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220505183950.2781801-5-peter.maydell@linaro.org
2022-05-09target/arm: Define neoverse-n1Richard Henderson
Enable the n1 for virt and sbsa board use. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-25-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Define cortex-a76Richard Henderson
Enable the a76 for virt and sbsa board use. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-24-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_DGH for -cpu maxRichard Henderson
This extension concerns not merging memory access, which TCG does not implement. Thus we can trivially enable this feature. Add a comment to handle_hint for the DGH instruction, but no code. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-23-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_CSV3 for -cpu maxRichard Henderson
This extension concerns cache speculation, which TCG does not implement. Thus we can trivially enable this feature. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-22-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_CSV2_2 for -cpu maxRichard Henderson
There is no branch prediction in TCG, therefore there is no need to actually include the context number into the predictor. Therefore all we need to do is add the state for SCXTNUM_ELx. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-21-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_CSV2 for -cpu maxRichard Henderson
This extension concerns branch speculation, which TCG does not implement. Thus we can trivially enable this feature. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-20-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_IESB for -cpu maxRichard Henderson
This feature is AArch64 only, and applies to physical SErrors, which QEMU does not implement, thus the feature is a nop. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-19-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_RAS for -cpu maxRichard Henderson
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-18-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_Debugv8p4 for -cpu maxRichard Henderson
This extension concerns changes to the External Debug interface, with Secure and Non-secure access to the debug registers, and all of it is outside the scope of QEMU. Indicating support for this is mandatory with FEAT_SEL2, which we do implement. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-13-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-09target/arm: Enable FEAT_Debugv8p2 for -cpu maxRichard Henderson
The only portion of FEAT_Debugv8p2 that is relevant to QEMU is CONTEXTIDR_EL2, which is also conditionally implemented with FEAT_VHE. The rest of the debug extension concerns the External debug interface, which is outside the scope of QEMU. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220506180242.216785-12-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-04-28target/arm: Advertise support for FEAT_BBM level 2Peter Maydell
The description in the Arm ARM of the requirements of FEAT_BBM is admirably clear on the guarantees it provides software, but slightly more obscure on what that means for implementations. The description of the equivalent SMMU feature in the SMMU specification (IHI0070D.b section 3.21.1) is perhaps a bit more detailed and includes some example valid implementation choices. (The SMMU version of this feature is slightly tighter than the CPU version: the CPU is permitted to raise TLB Conflict aborts in some situations that the SMMU may not. This doesn't matter for QEMU because we don't want to do TLB Conflict aborts anyway.) The informal summary of FEAT_BBM is that it is about permitting an OS to switch a range of memory between "covered by a huge page" and "covered by a sequence of normal pages" without having to engage in the 'break-before-make' dance that has traditionally been necessary. The 'break-before-make' sequence is: * replace the old translation table entry with an invalid entry * execute a DSB insn * execute a broadcast TLB invalidate insn * execute a DSB insn * write the new translation table entry * execute a DSB insn The point of this is to ensure that no TLB can simultaneously contain TLB entries for the old and the new entry, which would traditionally be UNPREDICTABLE (allowing the CPU to generate a TLB Conflict fault or to use a random mishmash of values from the old and the new entry). FEAT_BBM level 2 says "for the specific case where the only thing that changed is the size of the block, the TLB is guaranteed not to do weird things even if there are multiple entries for an address", which means that software can now do: * replace old translation table entry with new entry * DSB * broadcast TLB invalidate * DSB As the SMMU spec notes, valid ways to do this include: * if there are multiple entries in the TLB for an address, choose one of them and use it, ignoring the others * if there are multiple entries in the TLB for an address, throw them all out and do a page table walk to get a new one QEMU's page table walk implementation for Arm CPUs already meets the requirements for FEAT_BBM level 2. When we cache an entry in our TCG TLB, we do so only for the specific (non-huge) page that the address is in, and there is no way for the TLB data structure to ever have more than one TLB entry for that page. (We handle huge pages only in that we track what part of the address space is covered by huge pages so that a TLB invalidate operation for an address in a huge page results in an invalidation of the whole TLB.) We ignore the Contiguous bit in page table entries, so we don't have to do anything for the parts of FEAT_BBM that deal with changis to the Contiguous bit. FEAT_BBM level 2 also requires that the nT bit in block descriptors must be ignored; since commit 39a1fd25287f5dece5 we do this. It's therefore safe for QEMU to advertise FEAT_BBM level 2 by setting ID_AA64MMFR2_EL1.BBM to 2. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220426160422.2353158-3-peter.maydell@linaro.org
2022-04-28target/arm: Advertise support for FEAT_TTLPeter Maydell
The Arm FEAT_TTL architectural feature allows the guest to provide an optional hint in an AArch64 TLB invalidate operation about which translation table level holds the leaf entry for the address being invalidated. QEMU's TLB implementation doesn't need that hint, and we correctly ignore the (previously RES0) bits in TLB invalidate operation values that are now used for the TTL field. So we can simply advertise support for it in our 'max' CPU. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220426160422.2353158-2-peter.maydell@linaro.org
2022-04-22hw/arm/virt: Support TCG GICv4Peter Maydell
Add support for the TCG GICv4 to the virt board. For the board, the GICv4 is very similar to the GICv3, with the only difference being the size of the redistributor frame. The changes here are thus: * calculating virt_redist_capacity correctly for GICv4 * changing various places which were "if GICv3" to be "if not GICv2" * the commandline option handling Note that using GICv4 reduces the maximum possible number of CPUs on the virt board from 512 to 317, because we can now only fit half as many redistributors into the redistributor regions we have defined. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220408141550.1271295-42-peter.maydell@linaro.org
2022-04-21hw/arm/virt: impact of gic-version on max CPUsHeinrich Schuchardt
Describe that the gic-version influences the maximum number of CPUs. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Message-id: 20220413231456.35811-1-heinrich.schuchardt@canonical.com [PMM: minor punctuation tweaks] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-03-02target/arm: Implement FEAT_LPA2Richard Henderson
This feature widens physical addresses (and intermediate physical addresses for 2-stage translation) from 48 to 52 bits, when using 4k or 16k pages. This introduces the DS bit to TCR_ELx, which is RES0 unless the page size is enabled and supports LPA2, resulting in the effective value of DS for a given table walk. The DS bit changes the format of the page table descriptor slightly, moving the PS field out to TCR so that all pages have the same sharability and repurposing those bits of the page table descriptor for the highest bits of the output address. Do not yet enable FEAT_LPA2; we need extra plumbing to avoid tickling an old kernel bug. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220301215958.157011-17-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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