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Peter Maydell 74360f3544 target/arm: Enable FEAT_ETS2 for -cpu max 
FEAT_ETS2 is a tighter set of guarantees about memory ordering
involving translation table walks than the old FEAT_ETS; FEAT_ETS has
been retired from the Arm ARM and the old ID_AA64MMFR1.ETS == 1
now gives no greater guarantees than ETS == 0.

FEAT_ETS2 requires:
 * the virtual address of a load or store that appears in program
   order after a DSB cannot be translated until after the DSB
   completes (section B2.10.9)
 * TLB maintenance operations that only affect translations without
   execute permission are guaranteed complete after a DSB
   (R_BLDZX)
 * if a memory access RW2 is ordered-before memory access RW2,
   then RW1 is also ordered-before any translation table walk
   generated by RW2 that generates a Translation, Address size
   or Access flag fault (R_NNFPF, I_CLGHP)

As with FEAT_ETS, QEMU is already compliant, because we do not
reorder translation table walk memory accesses relative to other
memory accesses, and we always guarantee to have finished TLB
maintenance as soon as the TLB op is done.

Update the documentation to list FEAT_ETS2 instead of the
no-longer-existent FEAT_ETS, and update the 'max' CPU ID registers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240418152004.2106516-4-peter.maydell@linaro.org
2024-04-30 15:01:07 +01:00
..
arm target/arm: Enable FEAT_ETS2 for -cpu max 2024-04-30 15:01:07 +01:00
devices Revert "hw/virtio: Add support for VDPA network simulation devices" 2024-04-09 02:30:18 -04:00
i386 Fix some typos in documentation (found by codespell) 2024-04-02 13:38:40 +03:00
loongarch hw/rdma: Remove deprecated pvrdma device and rdmacm-mux helper 2024-04-24 16:03:38 +02:00
openrisc docs/system: openrisc: Add OpenRISC documentation 2022-09-04 07:02:57 +01:00
ppc docs/system/ppc/amigang.rst: Fix formatting 2024-03-26 14:24:06 +01:00
riscv docs/system/riscv: sifive_u: Update S-mode U-Boot image build instructions 2024-01-10 18:47:47 +10:00
s390x docs/s390: clarify even more that cpu-topology is KVM-only 2024-03-15 07:19:01 +01:00
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: Move bootindex.txt into system section and rstify 2021-08-02 12:55:51 +01:00
confidential-guest-support.rst docs: rstfy confidential guest documentation 2022-02-09 09:08:56 +01:00
cpu-hotplug.rst docs: Format literals correctly 2021-08-02 11:42:38 +01:00
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 docs: Start documenting VM templating 2023-09-19 10:23:21 +02:00
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 hw/arm: Add minimal support for the B-L475E-IOT01A board 2024-01-09 14:42:40 +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: Update maximum CPU numbers for PC Q35 2024-04-25 07:03:04 +02:00
target-i386.rst docs: Remove unused weirdly-named cross-reference targets 2023-05-12 15:43:38 +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 escc: emulate dip switch language layout settings on SUN keyboard 2023-06-28 10:54:25 +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