Commit Graph

3075 Commits

Author SHA1 Message Date
Fabiano Rosas
2ea2998f27 target/arm: Move regime_using_lpae_format into internal.h
This function is needed by common code (ptw.c), so move it along with
the other regime_* functions in internal.h. When we enable the build
without TCG, the tlb_helper.c file will not be present.

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
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
Fabiano Rosas
2b77ad4de6 target/arm: Wrap arm_rebuild_hflags calls with tcg_enabled
This is in preparation to moving the hflags code into its own file
under the tcg/ directory.

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
Claudio Fontana
9def656e7a target/arm: Move psci.c into the tcg directory
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@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
Claudio Fontana
a3ef070ea9 target/arm: move helpers to tcg/
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@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
Fabiano Rosas
f0984d4040 target/arm: move translate modules to tcg/
Introduce the target/arm/tcg directory. Its purpose is to hold the TCG
code that is selected by CONFIG_TCG.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@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
Fabiano Rosas
2059ec754f target/arm: Wrap TCG-only code in debug_helper.c
The next few patches will move helpers under CONFIG_TCG. We'd prefer
to keep the debug helpers and debug registers close together, so
rearrange the file a bit to be able to wrap the helpers with a TCG
ifdef.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-27 13:27:04 +00:00
Fabiano Rosas
fa05d1abb9 target/arm: Wrap breakpoint/watchpoint updates with tcg_enabled
This is in preparation for restricting compilation of some parts of
debug_helper.c to TCG only.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-27 13:27:04 +00:00
Fabiano Rosas
9200d5cc74 target/arm: Move cpregs code out of cpu.h
Since commit cf7c6d1004 ("target/arm: Split out cpregs.h") we now have
a cpregs.h header which is more suitable for this code.

Code moved verbatim.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:11:04 +00:00
Fabiano Rosas
501e6d1f6c target/arm: Move PC alignment check
Move this earlier to make the next patch diff cleaner. While here
update the comment slightly to not give the impression that the
misalignment affects only TCG.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:09:25 +00:00
Claudio Fontana
d55b2a2aa3 target/arm: wrap call to aarch64_sve_change_el in tcg_enabled()
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:08:38 +00:00
Claudio Fontana
0c1aaa66c2 target/arm: wrap psci call with tcg_enabled
for "all" builds (tcg + kvm), we want to avoid doing
the psci check if tcg is built-in, but not enabled.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:08:25 +00:00
Claudio Fontana
a06e3a68ba target/arm: rename handle_semihosting to tcg_handle_semihosting
make it clearer from the name that this is a tcg-only function.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:08:11 +00:00
Philippe Mathieu-Daudé
165876f22c target/arm: Declare CPU <-> NVIC helpers in 'hw/intc/armv7m_nvic.h'
While dozens of files include "cpu.h", only 3 files require
these NVIC helper declarations.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230206223502.25122-12-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
8f4e07c9d1 target/arm: Store CPUARMState::nvic as NVICState*
There is no point in using a void pointer to access the NVIC.
Use the real type to avoid casting it while debugging.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230206223502.25122-11-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
2bd6918f3c target/arm: Restrict CPUARMState::nvic to sysemu
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230206223502.25122-10-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
2a94a50776 target/arm: Restrict CPUARMState::arm_boot_info to sysemu
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230206223502.25122-9-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
1701d70e15 target/arm: Restrict CPUARMState::gicv3state to sysemu
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230206223502.25122-8-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
26f0856130 target/arm: Avoid resetting CPUARMState::eabi field
Although the 'eabi' field is only used in user emulation where
CPU reset doesn't occur, it doesn't belong to the area to reset.
Move it after the 'end_reset_fields' for consistency.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230206223502.25122-7-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
de4143fc77 target/arm: Convert CPUARMState::eabi to boolean
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230206223502.25122-6-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
0f150c8499 target/arm: Constify ID_PFR1 on user emulation
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230206223502.25122-5-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:47 +00:00
Philippe Mathieu-Daudé
eda349be62 target/arm: Reduce arm_v7m_mmu_idx_[all/for_secstate_and_priv]() scope
arm_v7m_mmu_idx_all() and arm_v7m_mmu_idx_for_secstate_and_priv()
are only used for system emulation in m_helper.c.
Move the definitions to avoid prototype forward declarations.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230206223502.25122-4-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:46 +00:00
Philippe Mathieu-Daudé
1eb13a0947 target/arm: Simplify arm_v7m_mmu_idx_for_secstate() for user emulation
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230206223502.25122-3-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-16 16:00:46 +00:00
Richard Henderson
9c32396deb target/arm: Use tcg_gen_atomic_cmpxchg_i128 for CASP
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20221112042555.2622152-3-richard.henderson@linaro.org>
2023-02-04 06:19:42 -10:00
Richard Henderson
546789c7df target/arm: Use tcg_gen_atomic_cmpxchg_i128 for STXP
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20221112042555.2622152-2-richard.henderson@linaro.org>
2023-02-04 06:19:42 -10:00
Peter Maydell
bb18151d8b target/arm: Enable FEAT_FGT on '-cpu max'
Update the ID registers for TCG's '-cpu max' to report the
presence of FEAT_FGT Fine-Grained Traps support.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-24-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-24-peter.maydell@linaro.org
2023-02-03 12:59:24 +00:00
Peter Maydell
1748ef03c5 target/arm: Implement MDCR_EL2.TDCC and MDCR_EL3.TDCC traps
FEAT_FGT also implements an extra trap bit in the MDCR_EL2 and
MDCR_EL3 registers: bit TDCC enables trapping of use of the Debug
Comms Channel registers OSDTRRX_EL1, OSDTRTX_EL1, MDCCSR_EL0,
MDCCINT_EL0, DBGDTR_EL0, DBGDTRRX_EL0 and DBGDTRTX_EL0 (and their
AArch32 equivalents).  This trapping is independent of whether
fine-grained traps are enabled or not.

Implement these extra traps.  (We don't implement DBGDTR_EL0,
DBGDTRRX_EL0 and DBGDTRTX_EL0.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-23-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-23-peter.maydell@linaro.org
2023-02-03 12:59:24 +00:00
Peter Maydell
34a8a07e57 target/arm: Implement the HFGITR_EL2.SVC_EL0 and SVC_EL1 traps
Implement the HFGITR_EL2.SVC_EL0 and SVC_EL1 fine-grained traps.
These trap execution of the SVC instruction from AArch32 and AArch64.
(As usual, AArch32 can only trap from EL0, as fine grained traps are
disabled with an AArch32 EL1.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-22-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-22-peter.maydell@linaro.org
2023-02-03 12:59:24 +00:00
Peter Maydell
5572f7557f target/arm: Implement the HFGITR_EL2.ERET trap
Implement the HFGITR_EL2.ERET fine-grained trap.  This traps
execution from AArch64 EL1 of ERET, ERETAA and ERETAB.  The trap is
reported with a syndrome value of 0x1a.

The trap must take precedence over a possible pointer-authentication
trap for ERETAA and ERETAB.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-21-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-21-peter.maydell@linaro.org
2023-02-03 12:59:24 +00:00
Peter Maydell
950037e280 target/arm: Mark up sysregs for HFGITR bits 48..63
Mark up the sysreg definitions for the system instructions
trapped by HFGITR bits 48..63.

Some of these bits are for trapping instructions which are
not in the system instruction encoding (i.e. which are
not handled by the ARMCPRegInfo mechanism):
 * ERET, ERETAA, ERETAB
 * SVC

We will have to handle those separately and manually.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-20-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-20-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
bf2f0625f8 target/arm: Mark up sysregs for HFGITR bits 18..47
Mark up the sysreg definitions for the system instructions
trapped by HFGITR bits 18..47. These bits cover TLBI
TLB maintenance instructions.

(If we implemented FEAT_XS we would need to trap some of the
instructions added by that feature using these bits; but we don't
yet, so will need to add the .fgt markup when we do.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-19-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-19-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
132c98cd93 target/arm: Mark up sysregs for HFGITR bits 12..17
Mark up the sysreg definitions for the system instructions
trapped by HFGITR bits 12..17. These bits cover AT address
translation instructions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-18-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-18-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
dd34565319 target/arm: Mark up sysregs for HFGITR bits 0..11
Mark up the sysreg definitions for the system instructions
trapped by HFGITR bits 0..11. These bits cover various
cache maintenance operations.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-17-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-17-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
dc780233b6 target/arm: Mark up sysregs for HDFGRTR bits 12..63
Mark up the sysreg definitions for the registers trapped
by HDFGRTR/HDFGWTR bits 12..x.

Bits 12..22 and bit 58 are for PMU registers.

The remaining bits in HDFGRTR/HDFGWTR are for traps on
registers that are part of features we don't implement:

Bits 23..32 and 63 : FEAT_SPE
Bits 33..48 : FEAT_ETE
Bits 50..56 : FEAT_TRBE
Bits 59..61 : FEAT_BRBE
Bit 62 : FEAT_SPEv1p2.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-16-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-16-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
917b1405c1 target/arm: Mark up sysregs for HDFGRTR bits 0..11
Mark up the sysreg definitons for the registers trapped
by HDFGRTR/HDFGWTR bits 0..11. These cover various debug
related registers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-15-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-15-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
bd8db7d905 target/arm: Mark up sysregs for HFGRTR bits 36..63
Mark up the sysreg definitions for the registers trapped
by HFGRTR/HFGWTR bits 36..63.

Of these, some correspond to RAS registers which we implement as
always-UNDEF: these don't need any extra handling for FGT because the
UNDEF-to-EL1 always takes priority over any theoretical
FGT-trap-to-EL2.

Bit 50 (NACCDATA_EL1) is for the ACCDATA_EL1 register which is part
of the FEAT_LS64_ACCDATA feature which we don't yet implement.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-14-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-14-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
67dd80306c target/arm: Mark up sysregs for HFGRTR bits 24..35
Mark up the sysreg definitions for the registers trapped
by HFGRTR/HFGWTR bits 24..35.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-13-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-13-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
b19ed03c4c target/arm: Mark up sysregs for HFGRTR bits 12..23
Mark up the sysreg definitions for the registers trapped
by HFGRTR/HFGWTR bits 12..23.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-12-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-12-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
158c276c74 target/arm: Mark up sysregs for HFGRTR bits 0..11
Mark up the sysreg definitions for the registers trapped
by HFGRTR/HFGWTR bits 0..11.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-11-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-11-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
361c33f6b8 target/arm: Implement FGT trapping infrastructure
Implement the machinery for fine-grained traps on normal sysregs.
Any sysreg with a fine-grained trap will set the new field to
indicate which FGT register bit it should trap on.

FGT traps only happen when an AArch64 EL2 enables them for
an AArch64 EL1. They therefore are only relevant for AArch32
cpregs when the cpreg can be accessed from EL0. The logic
in access_check_cp_reg() will check this, so it is safe to
add a .fgt marking to an ARM_CP_STATE_BOTH ARMCPRegInfo.

The DO_BIT and DO_REV_BIT macros define enum constants FGT_##bitname
which can be used to specify the FGT bit, eg
   .fgt = FGT_AFSR0_EL1
(We assume that there is no bit name duplication across the FGT
registers, for brevity's sake.)

Subsequent commits will add the .fgt fields to the relevant register
definitions and define the FGT_nnn values for them.

Note that some of the FGT traps are for instructions that we don't
handle via the cpregs mechanisms (mostly these are instruction traps).
Those we will have to handle separately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-10-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-10-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
15126d9ce2 target/arm: Define the FEAT_FGT registers
Define the system registers which are provided by the
FEAT_FGT fine-grained trap architectural feature:
 HFGRTR_EL2, HFGWTR_EL2, HDFGRTR_EL2, HDFGWTR_EL2, HFGITR_EL2

All these registers are a set of bit fields, where each bit is set
for a trap and clear to not trap on a particular system register
access.  The R and W register pairs are for system registers,
allowing trapping to be done separately for reads and writes; the I
register is for system instructions where trapping is on instruction
execution.

The data storage in the CPU state struct is arranged as a set of
arrays rather than separate fields so that when we're looking up the
bits for a system register access we can just index into the array
rather than having to use a switch to select a named struct member.
The later FEAT_FGT2 will add extra elements to these arrays.

The field definitions for the new registers are in cpregs.h because
in practice the code that needs them is code that also needs
the cpregs information; cpu.h is included in a lot more files.
We're also going to add some FGT-specific definitions to cpregs.h
in the next commit.

We do not implement HAFGRTR_EL2, because we don't implement
FEAT_AMUv1.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-9-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-9-peter.maydell@linaro.org
2023-02-03 12:59:23 +00:00
Peter Maydell
034bb45ac1 target/arm: Disable HSTR_EL2 traps if EL2 is not enabled
The HSTR_EL2 register is not supposed to have an effect unless EL2 is
enabled in the current security state.  We weren't checking for this,
which meant that if the guest set up the HSTR_EL2 register we would
incorrectly trap even for accesses from Secure EL0 and EL1.

Add the missing checks. (Other places where we look at HSTR_EL2
for the not-in-v8A bits TTEE and TJDBX are already checking that
we are in NS EL0 or EL1, so there we alredy know EL2 is enabled.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-8-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-8-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
049edada5e target/arm: Make HSTR_EL2 traps take priority over UNDEF-at-EL1
The semantics of HSTR_EL2 require that it traps cpreg accesses
to EL2 for:
 * EL1 accesses
 * EL0 accesses, if the access is not UNDEFINED when the
   trap bit is 0

(You can see this in the I_ZFGJP priority ordering, where HSTR_EL2
traps from EL1 to EL2 are priority 12, UNDEFs are priority 13, and
HSTR_EL2 traps from EL0 are priority 15.)

However, we don't get this right for EL1 accesses which UNDEF because
the register doesn't exist at all or because its ri->access bits
non-configurably forbid the access.  At EL1, check for the HSTR_EL2
trap early, before either of these UNDEF reasons.

We have to retain the HSTR_EL2 check in access_check_cp_reg(),
because at EL0 any kind of UNDEF-to-EL1 (including "no such
register", "bad ri->access" and "ri->accessfn returns 'trap to EL1'")
takes precedence over the trap to EL2.  But we only need to do that
check for EL0 now.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230130182459.3309057-7-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-7-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
cccc104bbf target/arm: All UNDEF-at-EL0 traps take priority over HSTR_EL2 traps
The HSTR_EL2 register has a collection of trap bits which allow
trapping to EL2 for AArch32 EL0 or EL1 accesses to coprocessor
registers.  The specification of these bits is that when the bit is
set we should trap
 * EL1 accesses
 * EL0 accesses, if the access is not UNDEFINED when the
   trap bit is 0

In other words, all UNDEF traps from EL0 to EL1 take precedence over
the HSTR_EL2 trap to EL2.  (Since this is all AArch32, the only kind
of trap-to-EL1 is the UNDEF.)

Our implementation doesn't quite get this right -- we check for traps
in the order:
 * no such register
 * ARMCPRegInfo::access bits
 * HSTR_EL2 trap bits
 * ARMCPRegInfo::accessfn

So UNDEFs that happen because of the access bits or because the
register doesn't exist at all correctly take priority over the
HSTR_EL2 trap, but where a register can UNDEF at EL0 because of the
accessfn we are incorrectly always taking the HSTR_EL2 trap.  There
aren't many of these, but one example is the PMCR; if you look at the
access pseudocode for this register you can see that UNDEFs taken
because of the value of PMUSERENR.EN are checked before the HSTR_EL2
bit.

Rearrange helper_access_check_cp_reg() so that we always call the
accessfn, and use its return value if it indicates that the access
traps to EL0 rather than continuing to do the HSTR_EL2 check.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-6-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-6-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
9ada333982 target/arm: Move do_coproc_insn() syndrome calculation earlier
Rearrange the code in do_coproc_insn() so that we calculate the
syndrome value for a potential trap early; we're about to add a
second check that wants this value earlier than where it is currently
determined.

(Specifically, a trap to EL2 because of HSTR_EL2 should take
priority over an UNDEF to EL1, even when the UNDEF is because
the register does not exist at all or because its ri->access
bits non-configurably fail the access. So the check we put in
for HSTR_EL2 trapping at EL1 (which needs the syndrome) is
going to have to be done before the check "is the ARMCPRegInfo
pointer NULL".)

This commit is just code motion; the change to HSTR_EL2
handling that will use the 'syndrome' variable is in a
subsequent commit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-5-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-5-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
80ea70f2e5 target/arm: Remove CP_ACCESS_TRAP_UNCATEGORIZED_{EL2, EL3}
We added the CPAccessResult values CP_ACCESS_TRAP_UNCATEGORIZED_EL2
and CP_ACCESS_TRAP_UNCATEGORIZED_EL3 purely in order to use them in
the ats_access() function, but doing so was incorrect (a bug fixed in
a previous commit).  There aren't any cases where we want an access
function to be able to request a trap to EL2 or EL3 with a zero
syndrome value, so remove these enum values.

As well as cleaning up dead code, the motivation here is that
we'd like to implement fine-grained-trap handling in
helper_access_check_cp_reg(). Although the fine-grained traps
to EL2 are always lower priority than trap-to-same-EL and
higher priority than trap-to-EL3, they are in the middle of
various other kinds of trap-to-EL2. Knowing that a trap-to-EL2
must always for us have the same syndrome (ie that an access
function will return CP_ACCESS_TRAP_EL2 and there is no other
kind of trap-to-EL2 enum value) means we don't have to try
to choose which of the two syndrome values to report if the
access would trap to EL2 both for the fine-grained-trap and
because the access function requires it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-4-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-4-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
ce9a8863b2 target/arm: Correct syndrome for ATS12NSO* at Secure EL1
The AArch32 ATS12NSO* address translation operations are supposed to
trap to either EL2 or EL3 if they're executed at Secure EL1 (which
can only happen if EL3 is AArch64).  We implement this, but we got
the syndrome value wrong: like other traps to EL2 or EL3 on an
AArch32 cpreg access, they should report the 0x3 syndrome, not the
0x0 'uncategorized' syndrome.  This is clear in the access pseudocode
for these instructions.

Fix the syndrome value for these operations by correcting the
returned value from the ats_access() function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-3-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-3-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Peter Maydell
3999d2d290 target/arm: Name AT_S1E1RP and AT_S1E1WP cpregs correctly
The encodings 0,0,C7,C9,0 and 0,0,C7,C9,1 are AT SP1E1RP and AT
S1E1WP, but our ARMCPRegInfo definitions for them incorrectly name
them AT S1E1R and AT S1E1W (which are entirely different
instructions).  Fix the names.

(This has no guest-visible effect as the names are for debug purposes
only.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-2-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-2-peter.maydell@linaro.org
2023-02-03 12:59:22 +00:00
Alexander Graf
a2260983c6 hvf: arm: Add support for GICv3
We currently only support GICv2 emulation. To also support GICv3, we will
need to pass a few system registers into their respective handler functions.

This patch adds support for HVF to call into the TCG callbacks for GICv3
system register handlers. This is safe because the GICv3 TCG code is generic
as long as we limit ourselves to EL0 and EL1 - which are the only modes
supported by HVF.

To make sure nobody trips over that, we also annotate callbacks that don't
work in HVF mode, such as EL state change hooks.

With GICv3 support in place, we can run with more than 8 vCPUs.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Message-id: 20230128224459.70676-1-agraf@csgraf.de
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-03 12:59:22 +00:00
Richard Henderson
9d2617ac7d target/arm: Fix physical address resolution for Stage2
Conversion to probe_access_full missed applying the page offset.

Cc: qemu-stable@nongnu.org
Reported-by: Sid Manning <sidneym@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230126233134.103193-1-richard.henderson@linaro.org
Fixes: f3639a64f6 ("target/arm: Use softmmu tlbs for page table walking")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-03 12:59:21 +00:00