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2d928adf8a
qemu/target/arm
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Peter Collingbourne 2d928adf8a target/arm: Use TCF0 and TFSRE0 for unprivileged tag checks 
Section D6.7 of the ARM ARM states:

For the purpose of determining Tag Check Fault handling, unprivileged
load and store instructions are treated as if executed at EL0 when
executed at either:
- EL1, when the Effective value of PSTATE.UAO is 0.
- EL2, when both the Effective value of HCR_EL2.{E2H, TGE} is {1, 1}
  and the Effective value of PSTATE.UAO is 0.

ARM has confirmed a defect in the pseudocode function
AArch64.TagCheckFault that makes it inconsistent with the above
wording. The remedy is to adjust references to PSTATE.EL in that
function to instead refer to AArch64.AccessUsesEL(acctype), so
that unprivileged instructions use SCTLR_EL1.TCF0 and TFSRE0_EL1.
The exception type for synchronous tag check faults remains unchanged.

This patch implements the described change by partially reverting
commits 50244cc76a and cc97b0019b.

Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210219201820.2672077-1-pcc@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-03-05 15:17:35 +00:00
..
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 target/arm: add spaces around operator 2020-11-10 11:03:47 +00:00
arm_ldst.h arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
arm-powerctl.c arm/arm-powerctl: rebuild hflags after setting CP15 bits in arm_set_cpu_on() 2019-12-20 14:03:00 +00:00
arm-powerctl.h target/arm/arm-powerctl: Add new arm_set_cpu_on_and_reset() 2019-02-28 11:03:04 +00:00
cpu64.c target/arm: Enable FEAT_SSBS for "max" AARCH64 CPU 2021-03-05 15:17:34 +00:00
cpu_tcg.c cpu: tcg_ops: move to tcg-cpu-ops.h, keep a pointer in CPUClass 2021-02-05 10:24:15 -10:00
cpu-param.h linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE 2021-02-16 13:06:16 +00:00
cpu-qom.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cpu.c target/arm: Set ID_PFR2.SSBS to 1 for "max" 32-bit CPU 2021-03-05 15:17:34 +00:00
cpu.h target/arm: Add support for FEAT_SSBS, Speculative Store Bypass Safe 2021-03-05 15:17:34 +00:00
crypto_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
debug_helper.c target/arm: Stop assuming DBGDIDR always exists 2020-02-21 16:07:01 +00:00
gdbstub64.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
gdbstub.c target/arm: use official org.gnu.gdb.aarch64.sve layout for registers 2021-01-18 10:05:06 +00:00
helper-a64.c target/arm: Speed up aarch64 TBL/TBX 2021-03-05 15:17:34 +00:00
helper-a64.h target/arm: Speed up aarch64 TBL/TBX 2021-03-05 15:17:34 +00:00
helper-sve.h arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
helper.c target/arm: Use TCF0 and TFSRE0 for unprivileged tag checks 2021-03-05 15:17:35 +00:00
helper.h target/arm: Fix neon VTBL/VTBX for len > 1 2020-11-10 11:03:48 +00:00
idau.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
internals.h target/arm: Add support for FEAT_SSBS, Speculative Store Bypass Safe 2021-03-05 15:17:34 +00:00
iwmmxt_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
kvm64.c target/arm: do not use cc->do_interrupt for KVM directly 2021-02-05 10:24:14 -10:00
kvm_arm.h hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
kvm-consts.h target/arm: Remove no-longer-reachable 32-bit KVM code 2020-09-14 14:23:19 +01:00
kvm-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
kvm.c sev/i386: Don't allow a system reset under an SEV-ES guest 2021-02-16 17:15:39 +01:00
m_helper.c target/arm/m_helper: Silence GCC 10 maybe-uninitialized error 2021-01-19 15:45:14 +00:00
m-nocp.decode target/arm: Implement new v8.1M VLLDM and VLSTM encodings 2020-12-10 11:44:56 +00:00
machine.c target/arm: Don't migrate CPUARMState.features 2021-02-11 11:50:13 +00:00
meson.build semihosting: Move ARM semihosting code to shared directories 2021-01-18 10:05:06 +00:00
monitor.c target/arm: Add cpu properties to control pauth 2021-01-19 14:38:51 +00:00
mte_helper.c target/arm: Use TCF0 and TFSRE0 for unprivileged tag checks 2021-03-05 15:17:35 +00:00
neon_helper.c target/arm: Convert Neon VADD, VSUB, VABD 3-reg-same insns to decodetree 2020-05-14 15:03:09 +01:00
neon-dp.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
neon-ls.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
neon-shared.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
op_addsub.h
op_helper.c target/arm: Support AA32 DIT by moving PSTATE_SS from cpsr into env->pstate 2021-02-11 11:50:14 +00:00
pauth_helper.c target/arm: Implement an IMPDEF pauth algorithm 2021-01-19 14:38:51 +00:00
psci.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
sve_helper.c target/arm: Update REV, PUNPK for pred_desc 2021-01-19 14:38:53 +00:00
sve.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
syndrome.h target/arm: Split out syndrome.h from internals.h 2021-02-16 13:16:18 +00:00
t16.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
t32.decode target/arm: Implement M-profile "minimal RAS implementation" 2020-12-10 11:44:56 +00:00
tlb_helper.c linux-user/aarch64: Pass syndrome to EXC_*_ABORT 2021-02-16 13:16:56 +00:00
trace-events trace-events: Shorten file names in comments 2019-03-22 16:18:07 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
translate-a64.c target/arm: Speed up aarch64 TBL/TBX 2021-03-05 15:17:34 +00:00
translate-a64.h arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
translate-neon.c.inc arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
translate-sve.c target/arm: Update REV, PUNPK for pred_desc 2021-01-19 14:38:53 +00:00
translate-vfp.c.inc target/arm: Implement FPCXT_NS fp system register 2021-01-08 15:13:38 +00:00
translate.c target/arm: Implement SCR_EL2.EEL2 2021-01-19 14:38:52 +00:00
translate.h target/arm: Rearrange {sve,fp}_check_access assert 2020-08-28 10:02:47 +01:00
vec_helper.c target/arm: Speed up aarch64 TBL/TBX 2021-03-05 15:17:34 +00:00
vec_internal.h arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
vfp_helper.c target/arm: Implement FPSCR.LTPSIZE for M-profile LOB extension 2020-10-20 16:12:01 +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: Implement VLDR/VSTR system register 2020-12-10 11:44:55 +00:00