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qemu/target/arm
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Peter Maydell 4825eaae4f Revert "arm: tcg: Adhere to SMCCC 1.3 section 5.2" 
This reverts commit 9fcd15b919.

This change turns out to cause regressions, for instance on the
imx6ul boards as described here:
https://lore.kernel.org/qemu-devel/c8b89685-7490-328b-51a3-48711c140a84@tribudubois.net/

The primary cause of that regression is that the guest code running
at EL3 expects SMCs (not related to PSCI) to do what they would if
our PSCI emulation was not present at all, but after this change
they instead set a value in R0/X0 and continue.

We could fix that by a refactoring that allowed us to only turn on
the PSCI emulation if we weren't booting the guest at EL3, but there
is a more tangled problem with the highbank board, which:
 (1) wants to enable PSCI emulation
 (2) has a bit of guest code that it wants to run at EL3 and
     to perform SMC calls that trap to the monitor vector table:
     this is the boot stub code that is written to memory by
     arm_write_secure_board_setup_dummy_smc() and which the
     highbank board enables by setting bootinfo->secure_board_setup

We can't satisfy both of those and also have the PSCI emulation
handle all SMC instruction executions regardless of function
identifier value.

This is too tricky to try to sort out before 6.2 is released;
revert this commit so we can take the time to get it right in
the 7.0 release.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20211119163419.557623-1-peter.maydell@linaro.org
2021-11-22 13:41:48 +00:00
..
hvf hvf: arm: Ignore cache operations on MMIO 2021-11-02 14:18:33 -04:00
a32-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
a32.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
arch_dump.c
arm_ldst.h accel/tcg: Add DisasContextBase argument to translator_ld* 2021-09-14 12:00:20 -07:00
arm-powerctl.c
arm-powerctl.h
cpu64.c target-arm: Add support for Fujitsu A64FX 2021-09-01 11:08:18 +01:00
cpu_tcg.c target/arm: Implement arm_cpu_record_sigbus 2021-11-02 07:00:52 -04:00
cpu-param.h linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE 2021-02-16 13:06:16 +00:00
cpu-qom.h
cpu.c target/arm: Implement arm_cpu_record_sigbus 2021-11-02 07:00:52 -04:00
cpu.h include/exec: Move cpu_signal_handler declaration 2021-09-21 19:36:44 -07:00
crypto_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
debug_helper.c accel/tcg: Remove TranslatorOps.breakpoint_check 2021-07-21 07:47:05 -10:00
gdbstub64.c target/arm: Move gdbstub related code out of helper.c 2021-09-30 13:42:10 +01:00
gdbstub.c target/arm: Advertise MVE to gdb when present 2021-11-02 14:14:55 -04:00
helper-a64.c target/arm: Use cpu_*_mmu instead of helper_*_mmu 2021-10-13 08:46:11 -07:00
helper-a64.h target/arm: Merge mte_check1, mte_checkN 2021-04-30 11:16:49 +01:00
helper-mve.h target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
helper-sve.h target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
helper.c target/arm: Move gdbstub related code out of helper.c 2021-09-30 13:42:10 +01:00
helper.h target/arm: Implement HSTR.TJDBX 2021-08-26 17:02:01 +01:00
hvf_arm.h hvf: arm: Implement -cpu host 2021-09-21 16:28:26 +01:00
idau.h
internals.h target/arm: Implement arm_cpu_record_sigbus 2021-11-02 07:00:52 -04:00
iwmmxt_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
kvm64.c target/arm/kvm64: Ensure sve vls map is completely clear 2021-08-26 17:01:59 +01:00
kvm_arm.h hvf: arm: Implement -cpu host 2021-09-21 16:28:26 +01:00
kvm-consts.h
kvm-stub.c
kvm.c memory: Name all the memory listeners 2021-09-30 15:30:24 +02:00
m_helper.c target/arm: Use cpu_*_mmu instead of helper_*_mmu 2021-10-13 08:46:11 -07:00
m-nocp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00
machine.c target/arm: Enforce that FPDSCR.LTPSIZE is 4 on inbound migration 2021-09-21 16:28:27 +01:00
meson.build arm: Add Hypervisor.framework build target 2021-09-21 16:28:26 +01:00
monitor.c target/arm: Add cpu properties to control pauth 2021-01-19 14:38:51 +00:00
mte_helper.c target/arm: Use cpu_loop_exit_sigsegv for mte tag lookup 2021-11-02 07:00:52 -04:00
mve_helper.c target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
mve.decode target/arm: Implement MVE VRINT insns 2021-09-01 11:08:17 +01:00
neon_helper.c target/arm: Split out saturating/rounding shifts from neon 2021-05-25 16:01:43 +01:00
neon-dp.decode target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
neon-ls.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
neon-shared.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
op_addsub.h
op_helper.c target/arm: Implement HSTR.TJDBX 2021-08-26 17:02:01 +01:00
pauth_helper.c target/arm: Implement an IMPDEF pauth algorithm 2021-01-19 14:38:51 +00:00
psci.c Revert "arm: tcg: Adhere to SMCCC 1.3 section 5.2" 2021-11-22 13:41:48 +00:00
sve_helper.c target/arm: Fixup comment re handle_cpu_signal 2021-11-02 07:00:52 -04:00
sve.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
syndrome.h target/arm: Take an exception if PSTATE.IL is set 2021-09-13 21:01:08 +01:00
t16.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
t32.decode target/arm: Implement MVE VCTP 2021-08-25 10:48:50 +01:00
tlb_helper.c target/arm: Implement arm_cpu_record_sigbus 2021-11-02 07:00:52 -04:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h
translate-a32.h target/arm: Introduce store_cpu_field_constant() helper 2021-11-02 14:14:55 -04:00
translate-a64.c target/arm: Drop checks for singlestep_enabled 2021-10-15 16:39:14 -07:00
translate-a64.h target/arm: Implement SVE2 XAR 2021-05-25 16:01:44 +01:00
translate-m-nocp.c target/arm: Add TB flag for "MVE insns not predicated" 2021-09-21 16:28:27 +01:00
translate-mve.c target/arm: Optimize MVE 1op-immediate insns 2021-09-21 16:28:27 +01:00
translate-neon.c target/arm: Implement MVE VADD (floating-point) 2021-09-01 11:08:16 +01:00
translate-sve.c target/arm: Use tcg_constant_i64() in do_sat_addsub_64() 2021-11-02 14:14:55 -04:00
translate-vfp.c target/arm: Add TB flag for "MVE insns not predicated" 2021-09-21 16:28:27 +01:00
translate.c target/arm: Use tcg_constant_i32() in gen_rev16() 2021-11-02 14:14:55 -04:00
translate.h target/arm: Add TB flag for "MVE insns not predicated" 2021-09-21 16:28:27 +01:00
vec_helper.c target/arm: Implement MVE VMULL (polynomial) 2021-08-25 10:48:49 +01:00
vec_internal.h target/arm: Implement MVE VMULL (polynomial) 2021-08-25 10:48:49 +01:00
vfp_helper.c target/arm: Check NaN mode before silencing NaN 2021-07-02 11:48:36 +01:00
vfp-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
vfp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00