Commit Graph

7 Commits

Author SHA1 Message Date
Peter Maydell e37e98b7f9 target/arm: Enable trapping of ERET for FEAT_NV
When FEAT_NV is turned on via the HCR_EL2.NV bit, ERET instructions
are trapped, with the same syndrome information as for the existing
FEAT_FGT fine-grained trap (in the pseudocode this is handled in
AArch64.CheckForEretTrap()).

Rename the DisasContext and tbflag bits to reflect that they are
no longer exclusively for FGT traps, and set the tbflag bit when
FEAT_NV is enabled as well as when the FGT is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
2024-01-09 14:43:45 +00:00
Michael Tokarev 51464c5612 target/arm/tcg: spelling fixes: alse, addreses
Fixes: 179e9a3bac "target/arm: Define new TB flag for ATA0"
Fixes: 5d7b37b5f6 "target/arm: Implement the CPY* instructions"
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-11-15 11:59:54 +03:00
Peter Maydell 5a534314a8 target/arm: Move feature test functions to their own header
The feature test functions isar_feature_*() now take up nearly
a thousand lines in target/arm/cpu.h. This header file is included
by a lot of source files, most of which don't need these functions.
Move the feature test functions to their own header file.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20231024163510.2972081-2-peter.maydell@linaro.org
2023-10-27 11:44:32 +01:00
Peter Maydell 179e9a3bac target/arm: Define new TB flag for ATA0
Currently the only tag-setting instructions always do so in the
context of the current EL, and so we only need one ATA bit in the TB
flags.  The FEAT_MOPS SETG instructions include ones which set tags
for a non-privileged access, so we now also need the equivalent "are
tags enabled?" information for EL0.

Add the new TB flag, and convert the existing 'bool ata' field in
DisasContext to a 'bool ata[2]' that can be indexed by the is_unpriv
bit in an instruction, similarly to mte[2].

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230912140434.1333369-9-peter.maydell@linaro.org
2023-09-21 16:07:14 +01:00
Peter Maydell 903dbefc2b target/arm: Don't skip MTE checks for LDRT/STRT at EL0
The LDRT/STRT "unprivileged load/store" instructions behave like
normal ones if executed at EL0. We handle this correctly for
the load/store semantics, but get the MTE checking wrong.

We always look at s->mte_active[is_unpriv] to see whether we should
be doing MTE checks, but in hflags.c when we set the TB flags that
will be used to fill the mte_active[] array we only set the
MTE0_ACTIVE bit if UNPRIV is true (i.e.  we are not at EL0).

This means that a LDRT at EL0 will see s->mte_active[1] as 0,
and will not do MTE checks even when MTE is enabled.

To avoid the translate-time code having to do an explicit check on
s->unpriv to see if it is OK to index into the mte_active[] array,
duplicate MTE_ACTIVE into MTE0_ACTIVE when UNPRIV is false.

(This isn't a very serious bug because generally nobody executes
LDRT/STRT at EL0, because they have no use there.)

Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230912140434.1333369-2-peter.maydell@linaro.org
2023-09-21 16:07:13 +01:00
Richard Henderson 83f624d9ba target/arm: Add SCTLR.nAA to TBFLAG_A64
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230530191438.411344-16-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-06-06 10:19:38 +01:00
Fabiano Rosas 671efad16a target/arm: Move hflags code into the tcg directory
The hflags are used only for TCG code, so introduce a new file
hflags.c to keep that code.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-27 13:27:04 +00:00