Gustavo Romero 374cdc8efe target/arm: Enable FEAT_CMOW for -cpu max ... FEAT_CMOW introduces support for controlling cache maintenance instructions executed in EL0/1 and is mandatory from Armv8.8. On real hardware, the main use for this feature is to prevent processes from invalidating or flushing cache lines for addresses they only have read permission, which can impact the performance of other processes. QEMU implements all cache instructions as NOPs, and, according to rule [1], which states that generating any Permission fault when a cache instruction is implemented as a NOP is implementation-defined, no Permission fault is generated for any cache instruction when it lacks read and write permissions. QEMU does not model any cache topology, so the PoU and PoC are before any cache, and rules [2] apply. These rules state that generating any MMU fault for cache instructions in this topology is also implementation-defined. Therefore, for FEAT_CMOW, we do not generate any MMU faults either, instead, we only advertise it in the feature register. [1] Rule R_HGLYG of section D8.14.3, Arm ARM K.a. [2] Rules R_MZTNR and R_DNZYL of section D8.14.3, Arm ARM K.a. Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20241104142606.941638-1-gustavo.romero@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>		2024-11-05 10:10:00 +00:00
..
arm	target/arm: Enable FEAT_CMOW for -cpu max	2024-11-05 10:10:00 +00:00
devices	virtio-gpu: Support Venus context	2024-10-28 16:56:36 +00:00
i386	docs/nitro-enclave: Documentation for nitro-enclave machine type	2024-10-31 18:28:33 +01:00
loongarch	roms: Support compile the efi bios for loongarch	2024-09-17 10:26:26 +02:00
openrisc	docs/system: openrisc: Add OpenRISC documentation	2022-09-04 07:02:57 +01:00
ppc	chardev: finalize 'reconnect' deprecation	2024-10-28 14:37:25 +08:00
riscv	docs/specs: add riscv-iommu	2024-10-31 13:51:24 +10:00
s390x	docs/system: Update documentation for s390x IPL	2024-10-23 06:53:44 +02:00
authz.rst	docs: Drop deprecated 'props' from object-add	2021-11-22 15:02:38 +01:00
barrier.rst	docs: Move user-facing barrier docs into system manual	2021-08-02 12:55:51 +01:00
bootindex.rst	docs/system: Update documentation for s390x IPL	2024-10-23 06:53:44 +02:00
confidential-guest-support.rst	docs: rstfy confidential guest documentation	2022-02-09 09:08:56 +01:00
cpu-hotplug.rst	docs/system/cpu-hotplug: Update example's socket-id/core-id	2024-10-29 15:04:46 +00:00
cpu-models-mips.rst.inc	docs/system: Update MIPS CPU documentation	2020-10-17 13:59:40 +02:00
cpu-models-x86-abi.csv	docs: re-generate x86_64 ABI compatibility CSV	2024-02-09 12:48:11 +00:00
cpu-models-x86.rst.inc	docs: fix highlighting of CPU ABI header rows	2024-02-09 12:48:10 +00:00
device-emulation.rst	Revert "hw/virtio: Add support for VDPA network simulation devices"	2024-04-09 02:30:18 -04:00
device-url-syntax.rst.inc	block/gluster: Remove deprecated RDMA protocol handling	2024-04-24 16:03:38 +02:00
gdb.rst	docs/system: clarify limits of using gdbstub in system emulation	2023-11-23 14:10:06 +00:00
generic-loader.rst	docs: Move licence/copyright from HTML output to rST comments	2021-08-02 11:42:38 +01:00
guest-loader.rst	docs/system: remove excessive punctuation from guest-loader docs	2023-04-27 14:58:41 +01:00
images.rst	docs: Render binary names as monospaced text	2021-11-22 15:02:38 +01:00
index.rst	Revert "docs: Document composable SR-IOV device"	2024-08-01 04:32:00 -04:00
introduction.rst	docs/s390: clarify even more that cpu-topology is KVM-only	2024-03-15 07:19:01 +01:00
invocation.rst	qemu-options: Clarify handling of commas in options parameters	2023-12-20 10:29:23 +01:00
keys.rst	docs: Remove unused weirdly-named cross-reference targets	2023-05-12 15:43:38 +01:00
keys.rst.inc	docs/system: Update description for input grab key	2024-02-22 08:58:43 +03:00
linuxboot.rst	docs: Remove unused weirdly-named cross-reference targets	2023-05-12 15:43:38 +01:00
managed-startup.rst	docs/system: convert managed startup to rST.	2020-03-06 10:05:12 +00:00
monitor.rst	docs: Get rid of the weird _005f links in the man page	2020-11-20 13:19:08 +01:00
multi-process.rst	docs: fix multi-process QEMU documentation	2023-06-07 10:21:53 -04:00
mux-chardev.rst	docs: Get rid of the weird _005f links in the man page	2020-11-20 13:19:08 +01:00
mux-chardev.rst.inc	docs: Split out sections for the manpage into .rst.inc files	2020-03-06 11:06:55 +00:00
pr-manager.rst	docs/system/pr-manager.rst: Fix minor docs nits	2020-11-23 11:10:04 +00:00
qemu-block-drivers.rst	docs/system: standardize man page sections to --- with overline	2021-09-13 13:56:26 +02:00
qemu-block-drivers.rst.inc	block/gluster: Remove deprecated RDMA protocol handling	2024-04-24 16:03:38 +02:00
qemu-cpu-models.rst	docs/system: standardize man page sections to --- with overline	2021-09-13 13:56:26 +02:00
qemu-manpage.rst	qemu-options: Clarify handling of commas in options parameters	2023-12-20 10:29:23 +01:00
replay.rst	target/nios2: Remove the deprecated Nios II target	2024-04-24 16:03:38 +02:00
secrets.rst	docs: document how to pass secret data to QEMU	2021-06-14 13:28:50 +01:00
security.rst	docs/system: Convert security.texi to rST format	2020-03-06 10:05:12 +00:00
target-arm.rst	docs/system/target-arm.rst: Remove "many boards are undocumented" note	2024-10-29 15:04:47 +00:00
target-avr.rst	docs: update to show preferred boolean syntax for -chardev	2021-02-25 14:14:33 +01:00
target-i386-desc.rst.inc	docs: i386: pc: Avoid mentioning limit of maximum vCPUs	2024-06-08 10:33:38 +02:00
target-i386.rst	docs/nitro-enclave: Documentation for nitro-enclave machine type	2024-10-31 18:28:33 +01:00
target-m68k.rst	docs: Roll semihosting option information into qemu-options.hx	2020-03-06 10:05:12 +00:00
target-mips.rst	docs/system: Remove "mips" board from target-mips.rst	2023-03-07 18:08:12 +01:00
target-openrisc.rst	docs/system: openrisc: Add OpenRISC documentation	2022-09-04 07:02:57 +01:00
target-ppc.rst	docs/system/ppc: Document running Linux on AmigaNG machines	2024-03-13 02:47:04 +10:00
target-riscv.rst	docs/system/target-riscv.rst: tidy CPU firmware section	2023-07-19 14:30:04 +10:00
target-rx.rst	docs: Document the RX target	2020-06-22 18:37:12 +02:00
target-s390x.rst	docs/s390x/cpu topology: document s390x cpu topology	2023-10-20 07:16:53 +02:00
target-sparc64.rst	docs: Roll -prom-env and -g target-specific info into qemu-options.hx	2020-03-06 10:05:18 +00:00
target-sparc.rst	docs/system/target-sparc: Improve the Sparc documentation	2024-05-05 21:02:48 +01:00
target-xtensa.rst	docs: Roll semihosting option information into qemu-options.hx	2020-03-06 10:05:12 +00:00
targets.rst	docs/system: openrisc: Add OpenRISC documentation	2022-09-04 07:02:57 +01:00
tls.rst	misc: fix commonly doubled up words	2022-08-01 11:58:02 +02:00
virtio-net-failover.rst	docs: Move virtio-net-failover.rst into the system manual	2020-11-23 11:07:41 +00:00
vm-templating.rst	docs: Start documenting VM templating	2023-09-19 10:23:21 +02:00
vnc-security.rst	docs: recommend SCRAM-SHA-256 SASL mech instead of SHA-1 variant	2021-06-14 13:28:50 +01:00