In do_v7m_exception_exit(), there's no need to force the high 4
bits of 'type' to 1 when calling v7m_exception_taken(), because
we know that they're always 1 or we could not have got to this
"handle return to magic exception return address" code. Remove
the unnecessary ORs.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1505137930-13255-6-git-send-email-peter.maydell@linaro.org
For a bus fault, the M profile BFSR bit PRECISERR means a bus
fault on a data access, and IBUSERR means a bus fault on an
instruction access. We had these the wrong way around; fix this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1505137930-13255-4-git-send-email-peter.maydell@linaro.org
For M profile we must clear the exclusive monitor on reset, exception
entry and exception exit. We weren't doing any of these things; fix
this bug.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1505137930-13255-3-git-send-email-peter.maydell@linaro.org
Use a symbolic constant M_REG_NUM_BANKS for the array size for
registers which are banked by M profile security state, rather
than hardcoding lots of 2s.
Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1505137930-13255-2-git-send-email-peter.maydell@linaro.org
Running QEMU with
qemu-system-aarch64 -M none -nographic -m 256
and executing
dump-guest-memory /dev/null 0 8192
results in segfault
Fix by checking if we have CPU, and exit with
error if there is no CPU:
(qemu) dump-guest-memory /dev/null
this feature or command is not currently supported
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20170913142036.2469-3-lvivier@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* cleanups converting to DEFINE_PROP_LINK
* allwinner-a10: mark as not user-creatable
* initial patches working towards ARMv8M support
* implement generating aborts on memory transaction failures
* make BXJ behave correctly (ie not UNDEF) on ARMv6-and-later
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20170907' into staging
target-arm:
* cleanups converting to DEFINE_PROP_LINK
* allwinner-a10: mark as not user-creatable
* initial patches working towards ARMv8M support
* implement generating aborts on memory transaction failures
* make BXJ behave correctly (ie not UNDEF) on ARMv6-and-later
# gpg: Signature made Thu 07 Sep 2017 14:26:07 BST
# gpg: using RSA key 0x3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg: aka "Peter Maydell <pmaydell@gmail.com>"
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE
* remotes/pmaydell/tags/pull-target-arm-20170907: (31 commits)
target/arm: Add Jazelle feature
target/arm: Implement new do_transaction_failed hook
hw/arm: Set ignore_memory_transaction_failures for most ARM boards
boards.h: Define new flag ignore_memory_transaction_failures
target/arm: Implement BXNS, and banked stack pointers
target/arm: Move regime_is_secure() to target/arm/internals.h
target/arm: Make CFSR register banked for v8M
target/arm: Make MMFAR banked for v8M
target/arm: Make CCR register banked for v8M
target/arm: Make MPU_CTRL register banked for v8M
target/arm: Make MPU_RNR register banked for v8M
target/arm: Make MPU_RBAR, MPU_RLAR banked for v8M
target/arm: Make MPU_MAIR0, MPU_MAIR1 registers banked for v8M
target/arm: Make VTOR register banked for v8M
nvic: Add NS alias SCS region
target/arm: Make CONTROL register banked for v8M
target/arm: Make FAULTMASK register banked for v8M
target/arm: Make PRIMASK register banked for v8M
target/arm: Make BASEPRI register banked for v8M
target/arm: Add MMU indexes for secure v8M
...
# Conflicts:
# target/arm/translate.c
This adds a feature bit indicating support of the (trivial) Jazelle
implementation if ARM_FEATURE_V6 is set or if the processor is arm926
or arm1026. This fixes the issue that any BXJ instruction will
result in an illegal_op. BXJ instructions will now check if the
architecture supports ARM_FEATURE_JAZELLE.
Signed-off-by: Portia Stephens <portia.stephens@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20170905211232.11092-1-portia.stephens@xilinx.com
[PMM: edited commit message and comment text a bit]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Implement the new do_transaction_failed hook for ARM, which should
cause the CPU to take a prefetch abort or data abort.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1504626814-23124-4-git-send-email-peter.maydell@linaro.org
Implement the BXNS v8M instruction, which is like BX but will do a
jump-and-switch-to-NonSecure if the branch target address has bit 0
clear.
This is the first piece of code which implements "switch to the
other security state", so the commit also includes the code to
switch the stack pointers around, which is the only complicated
part of switching security state.
BLXNS is more complicated than just "BXNS but set the link register",
so we leave it for a separate commit.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-21-git-send-email-peter.maydell@linaro.org
Move the regime_is_secure() utility function to internals.h;
we are going to want to call it from translate.c.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-20-git-send-email-peter.maydell@linaro.org
Make the CFSR register banked if v8M security extensions are enabled.
Not all the bits in this register are banked: the BFSR
bits [15:8] are shared between S and NS, and we store them
in the NS copy of the register.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-19-git-send-email-peter.maydell@linaro.org
Make the MMFAR register banked if v8M security extensions are
enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-18-git-send-email-peter.maydell@linaro.org
Make the CCR register banked if v8M security extensions are enabled.
This is slightly more complicated than the other "add banking"
patches because there is one bit in the register which is not
banked. We keep the live data in the NS copy of the register,
and adjust it on register reads and writes. (Since we don't
currently implement the behaviour that the bit controls, there
is nowhere else that needs to care.)
This patch includes the enforcement of the bits which are newly
RES1 in ARMv8M.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1503414539-28762-17-git-send-email-peter.maydell@linaro.org
Make the MPU_CTRL register banked if v8M security extensions are
enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-16-git-send-email-peter.maydell@linaro.org
Make the MPU_RNR register banked if v8M security extensions are
enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-15-git-send-email-peter.maydell@linaro.org
Make the MPU registers MPU_MAIR0 and MPU_MAIR1 banked if v8M security
extensions are enabled.
We can freely add more items to vmstate_m_security without
breaking migration compatibility, because no CPU currently
has the ARM_FEATURE_M_SECURITY bit enabled and so this
subsection is not yet used by anything.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-14-git-send-email-peter.maydell@linaro.org
Make the MPU registers MPU_MAIR0 and MPU_MAIR1 banked if v8M security
extensions are enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-13-git-send-email-peter.maydell@linaro.org
Make the VTOR register banked if v8M security extensions are enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-12-git-send-email-peter.maydell@linaro.org
Make the CONTROL register banked if v8M security extensions are enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-10-git-send-email-peter.maydell@linaro.org
Make the FAULTMASK register banked if v8M security extensions are enabled.
Note that we do not yet implement the functionality of the new
AIRCR.PRIS bit (which allows the effect of the NS copy of FAULTMASK to
be restricted).
This patch includes the code to determine for v8M which copy
of FAULTMASK should be updated on exception exit; further
changes will be required to the exception exit code in general
to support v8M, so this is just a small piece of that.
The v8M ARM ARM introduces a notation where individual paragraphs
are labelled with R (for rule) or I (for information) followed
by a random group of subscript letters. In comments where we want
to refer to a particular part of the manual we use this convention,
which should be more stable across document revisions than using
section or page numbers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-9-git-send-email-peter.maydell@linaro.org
Make the PRIMASK register banked if v8M security extensions are enabled.
Note that we do not yet implement the functionality of the new
AIRCR.PRIS bit (which allows the effect of the NS copy of PRIMASK to
be restricted).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-8-git-send-email-peter.maydell@linaro.org
Make the BASEPRI register banked if v8M security extensions are enabled.
Note that we do not yet implement the functionality of the new
AIRCR.PRIS bit (which allows the effect of the NS copy of BASEPRI to
be restricted).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-7-git-send-email-peter.maydell@linaro.org
Now that MPU lookups can return different results for v8M
when the CPU is in secure vs non-secure state, we need to
have separate MMU indexes; add the secure counterparts
to the existing three M profile MMU indexes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-6-git-send-email-peter.maydell@linaro.org
If a v8M CPU supports the security extension then we need to
give it two AddressSpaces, the same way we do already for
an A profile core with EL3.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-5-git-send-email-peter.maydell@linaro.org
As the first step in implementing ARM v8M's security extension:
* add a new feature bit ARM_FEATURE_M_SECURITY
* add the CPU state field that indicates whether the CPU is
currently in the secure state
* add a migration subsection for this new state
(we will add the Secure copies of banked register state
to this subsection in later patches)
* add a #define for the one new-in-v8M exception type
* make the CPU debug log print S/NS status
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-4-git-send-email-peter.maydell@linaro.org
Implement the behavioural side of the new PMSAv8 specification.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-3-git-send-email-peter.maydell@linaro.org
As part of ARMv8M, we need to add support for the PMSAv8 MPU
architecture.
PMSAv8 differs from PMSAv7 both in register/data layout (for instance
using base and limit registers rather than base and size) and also in
behaviour (for example it does not have subregions); rather than
trying to wedge it into the existing PMSAv7 code and data structures,
we define separate ones.
This commit adds the data structures which hold the state for a
PMSAv8 MPU and the register interface to it. The implementation of
the MPU behaviour will be added in a subsequent commit.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1503414539-28762-2-git-send-email-peter.maydell@linaro.org
ARM is a fixed-length ISA and we can compute the page crossing
condition exactly once during init_disas_context.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
We need not check for ARM vs Thumb state in order to dispatch
disassembly of every instruction.
Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
We can check for single-step just once.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Since AArch64 uses a fixed-width ISA, we can pre-compute the number of
insns remaining on the page. Also, we can check for single-step once.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002606914.22386.15524101311003685068.stgit@frigg.lan>
[rth: Move tb->size computation and use that result.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002582711.22386.191527630537864599.stgit@frigg.lan>
[rth: Move tb->size computation and use that result.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002558503.22386.1149037590886263349.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002534291.22386.13499916738708680298.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002510079.22386.10164419868911710218.stgit@frigg.lan>
[rth: Adjust for translate_insn interface change.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002485863.22386.13949856269576226529.stgit@frigg.lan>
[rth: Adjust for translate_insn interface change.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <150002461630.22386.14827196109258040543.stgit@frigg.lan>
[rth: Use DISAS_TOO_MANY for "execute only one more" after bp.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002413187.22386.156315485813606121.stgit@frigg.lan>
[rth: Use DISAS_TOO_MANY for "execute only one more" after bp.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002388959.22386.12439646324427589940.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002364681.22386.1701754996184325808.stgit@frigg.lan>
[rth: Adjust for tb_start interface change.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002340430.22386.10889954302345646107.stgit@frigg.lan>
[rth: Adjust for max_insns interface change.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic instruction translation
loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002316201.22386.12115078843605656029.stgit@frigg.lan>
[rth: Adjust for max_insns interface change.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Incrementally paves the way towards using the generic
instruction translation loop.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Benneé <alex.benee@linaro.org>
Message-Id: <150002291931.22386.11441154993010495674.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
There's nothing magic about the exception that we generate in order
to execute the magic kernel page. We can and should allow gdb to
set a breakpoint at this location.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Used later. An enum makes expected values explicit and
bounds the value space of switches.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <150002049746.22386.2316077281615710615.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Fold DISAS_EXC and DISAS_TB_JUMP into DISAS_NORETURN.
In both cases all following code is dead. In the first
case because we have exited the TB via exception; in the
second case because we have exited the TB via goto_tb
and its associated machinery.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
For "ldp x0, x1, [x0]", if the second load is on a second page and
the second page is unmapped, the exception would be raised with x0
already modified. This means the instruction couldn't be restarted.
Cc: qemu-arm@nongnu.org
Cc: qemu-stable@nongnu.org
Reported-by: Andrew <andrew@fubar.geek.nz>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20170825224833.4463-1-richard.henderson@linaro.org
Fixes: https://bugs.launchpad.net/qemu/+bug/1713066
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[PMM: tweaked comment format]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
For external aborts, we will want to be able to specify the EA
(external abort type) bit in the syndrome field. Allow callers of
deliver_fault() to do that by adding a field to ARMMMUFaultInfo which
we use when constructing the syndrome values.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
