Commit Graph

56556 Commits

Author SHA1 Message Date
Marc-André Lureau
245792ddb7 vhost-user-scsi: simplify unix path cleanup
Always remove the unix path when leaving the program (instead of when
freeing scsi_dev). Note that unix_sock_new() also unlink() exisiting
path before creating the socket.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-10-10 23:31:09 +02:00
Marc-André Lureau
4309251a8c vhost-user-scsi: remove vdev_scsi_find_by_vu()
The *dev pointer belongs to the vhost_scsi_dev_t parent.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-10-10 23:31:09 +02:00
Marc-André Lureau
9a6903dbe3 vhost-user-scsi: also free the gtree
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:09 +02:00
Marc-André Lureau
b4fe56e9ed vhost-user-scsi: glib calls that allocate don't return NULL
They abort instead, so get rid of failure conditions.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-10-10 23:31:09 +02:00
Marc-André Lureau
3d9ad8be3d vhost-user-scsi: use glib allocation
Use g_new/g_free instead of plain malloc. This simplify a bit memory
handling since glib will abort if it cannot allocate.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:09 +02:00
Marc-André Lureau
8c36ed6e02 vhost-user-scsi: code style fixes
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
0644fe4ad0 vhost-user-scsi: connect unix socket before allocating
This simplify a little bit memory management in the following patches.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
b085b050c6 vhost-user-scsi: use g_strdup()
Since vhost-user-scsi uses glib.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
19409df883 libvhost-user: improve vu_queue_pop() doc
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
eb078a9f0c libvhost-user: drop dependency on glib
libvhost-user is meant to be free of glib dependency. Make sure it is
by droping qemu/osdep.h (which included glib.h)

This fixes a bad malloc()/g_free() pair.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
d59a031c7e build-sys: make vhost-user-scsi depend on libvhost-user.a
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
de97cdede3 build-sys: fix libvhost-user.a build
And actually link to it from vhost-user-bridge.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 23:31:08 +02:00
Marc-André Lureau
660db84d9b glib-compat: move G_SOURCE_CONTINUE/REMOVE there
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-10 16:33:55 +02:00
Peter Maydell
567d0a19c7 x86 and machine queue, 2017-10-09
Includes x86, QOM, CPU, and option/config parsing patches.
 
 Highlights:
 * Deprecation of -nodefconfig option;
 * MachineClass::valid_cpu_types field.
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Merge remote-tracking branch 'remotes/ehabkost/tags/x86-and-machine-pull-request' into staging

x86 and machine queue, 2017-10-09

Includes x86, QOM, CPU, and option/config parsing patches.

Highlights:
* Deprecation of -nodefconfig option;
* MachineClass::valid_cpu_types field.

# gpg: Signature made Tue 10 Oct 2017 03:31:33 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-and-machine-pull-request:
  x86: Correct translation of some rdgsbase and wrgsbase encodings
  vl: exit if maxcpus is negative
  qom: update doc comment for type_register[_static]()
  config: qemu_config_parse() return number of config groups
  qemu-options: Deprecate -nodefconfig
  vl: Eliminate defconfig variable
  machine: Add a valid_cpu_types property
  qom/cpu: move cpu_model null check to cpu_class_by_name()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-10 13:25:46 +01:00
Todd Eisenberger
e0dd5fd41a x86: Correct translation of some rdgsbase and wrgsbase encodings
It looks like there was a transcription error when writing this code
initially.  The code previously only decoded src or dst of rax.  This
resolves
https://bugs.launchpad.net/qemu/+bug/1719984.

Signed-off-by: Todd Eisenberger <teisenbe@google.com>
Message-Id: <CAP26EVRNVb=Mq=O3s51w7fDhGVmf-e3XFFA73MRzc5b4qKBA4g@mail.gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:29:20 -03:00
Seeteena Thoufeek
c0dd109919 vl: exit if maxcpus is negative
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

---Steps to Reproduce---

When passed a negative number to 'maxcpus' parameter, Qemu aborts
with a core dump.

Run the following command with maxcpus argument as negative number

ppc64-softmmu/qemu-system-ppc64 --nographic -vga none -machine
pseries,accel=kvm,kvm-type=HV -m size=200g -device virtio-blk-pci,
drive=rootdisk -drive file=/home/images/pegas-1.0-ppc64le.qcow2,
if=none,cache=none,id=rootdisk,format=qcow2 -monitor telnet
:127.0.0.1:1234,server,nowait -net nic,model=virtio -net
user -redir tcp:2000::22 -device nec-usb-xhci -smp 8,cores=1,
threads=1,maxcpus=-12

(process:12149): GLib-ERROR **: gmem.c:130: failed to allocate
 18446744073709550568 bytes

Trace/breakpoint trap

Reported-by: R.Nageswara Sastry <rnsastry@linux.vnet.ibm.com>
Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com>
Message-Id: <1504511031-26834-1-git-send-email-s1seetee@linux.vnet.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-10-09 23:21:52 -03:00
Igor Mammedov
31b9352192 qom: update doc comment for type_register[_static]()
type_register()/type_register_static() functions in current impl.
can't fail returning 0, also none of the users check for error
so update doc comment to reflect current behaviour.

Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1507111682-66171-2-git-send-email-imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Eduardo Habkost
e5766d6ec7 config: qemu_config_parse() return number of config groups
Change qemu_config_parse() to return the number of config groups
in success and -EINVAL on error. This will allow callers of
qemu_config_parse() to check if something was really loaded from
the config file.

All existing callers of qemu_config_parse() and
qemu_read_config_file() only check if the return value was
negative, so the change shouldn't affect them.

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20171004025043.3788-2-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Eduardo Habkost
3478eae990 qemu-options: Deprecate -nodefconfig
Since 2012 (commit ba6212d8 "Eliminate cpus-x86_64.conf file") we
have no default config files that would be disabled using
-nodefconfig.  Update documentation and document -nodefconfig as
deprecated.

Cc: Markus Armbruster <armbru@redhat.com>
Acked-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20171004030025.7866-3-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Eduardo Habkost
1ea06c398c vl: Eliminate defconfig variable
Both -nodefconfig and -no-user-config options do the same thing
today, we only need one variable to keep track of them.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20171004030025.7866-2-ehabkost@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Alistair Francis
c9cf636d48 machine: Add a valid_cpu_types property
This patch add a MachineClass element that can be set in the machine C
code to specify a list of supported CPU types. If the supported CPU
types are specified the user enter CPU (by -cpu at runtime) is checked
against the supported types and QEMU exits if they aren't supported.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Message-Id: <b8474e9d2e0a219d9bac901342f983b13d009301.1507059418.git.alistair.francis@xilinx.com>
[ehabkost: removed assert(), rewrote comment]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Philippe Mathieu-Daudé
8301ea444a qom/cpu: move cpu_model null check to cpu_class_by_name()
and clean every implementation.

Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170917232842.14544-1-f4bug@amsat.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-10-09 23:21:52 -03:00
Peter Maydell
530049bc1d Block layer patches
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Fri 06 Oct 2017 16:52:59 BST
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (54 commits)
  block/mirror: check backing in bdrv_mirror_top_flush
  qcow2: truncate the tail of the image file after shrinking the image
  qcow2: fix return error code in qcow2_truncate()
  iotests: Fix 195 if IMGFMT is part of TEST_DIR
  block/mirror: check backing in bdrv_mirror_top_refresh_filename
  block: support passthrough of BDRV_REQ_FUA in crypto driver
  block: convert qcrypto_block_encrypt|decrypt to take bytes offset
  block: convert crypto driver to bdrv_co_preadv|pwritev
  block: fix data type casting for crypto payload offset
  crypto: expose encryption sector size in APIs
  block: use 1 MB bounce buffers for crypto instead of 16KB
  iotests: Add test 197 for covering copy-on-read
  block: Perform copy-on-read in loop
  block: Add blkdebug hook for copy-on-read
  iotests: Restore stty settings on completion
  block: Uniform handling of 0-length bdrv_get_block_status()
  qemu-io: Add -C for opening with copy-on-read
  commit: Remove overlay_bs
  qemu-iotests: Test commit block job where top has two parents
  qemu-iotests: Allow QMP pretty printing in common.qemu
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-06 17:43:02 +01:00
Peter Maydell
5121d81e38 target-arm:
* v8M: more preparatory work
  * nvic: reset properly rather than leaving the nvic in a weird state
  * xlnx-zynqmp: Mark the "xlnx, zynqmp" device with user_creatable = false
  * sd: fix out-of-bounds check for multi block reads
  * arm: Fix SMC reporting to EL2 when QEMU provides PSCI
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20171006' into staging

target-arm:
 * v8M: more preparatory work
 * nvic: reset properly rather than leaving the nvic in a weird state
 * xlnx-zynqmp: Mark the "xlnx, zynqmp" device with user_creatable = false
 * sd: fix out-of-bounds check for multi block reads
 * arm: Fix SMC reporting to EL2 when QEMU provides PSCI

# gpg: Signature made Fri 06 Oct 2017 16:58:15 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-20171006:
  nvic: Add missing code for writing SHCSR.HARDFAULTPENDED bit
  target/arm: Factor out "get mmuidx for specified security state"
  target/arm: Fix calculation of secure mm_idx values
  target/arm: Implement security attribute lookups for memory accesses
  nvic: Implement Security Attribution Unit registers
  target/arm: Add v8M support to exception entry code
  target/arm: Add support for restoring v8M additional state context
  target/arm: Update excret sanity checks for v8M
  target/arm: Add new-in-v8M SFSR and SFAR
  target/arm: Don't warn about exception return with PC low bit set for v8M
  target/arm: Warn about restoring to unaligned stack
  target/arm: Check for xPSR mismatch usage faults earlier for v8M
  target/arm: Restore SPSEL to correct CONTROL register on exception return
  target/arm: Restore security state on exception return
  target/arm: Prepare for CONTROL.SPSEL being nonzero in Handler mode
  target/arm: Don't switch to target stack early in v7M exception return
  nvic: Clear the vector arrays and prigroup on reset
  hw/arm/xlnx-zynqmp: Mark the "xlnx, zynqmp" device with user_creatable = false
  hw/sd: fix out-of-bounds check for multi block reads
  arm: Fix SMC reporting to EL2 when QEMU provides PSCI

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-06 17:00:42 +01:00
Peter Maydell
04829ce334 nvic: Add missing code for writing SHCSR.HARDFAULTPENDED bit
When we added support for the new SHCSR bits in v8M in commit
437d59c17e the code to support writing to the new HARDFAULTPENDED
bit was accidentally only added for non-secure writes; the
secure banked version of the bit should also be writable.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-21-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
b81ac0eb63 target/arm: Factor out "get mmuidx for specified security state"
For the SG instruction and secure function return we are going
to want to do memory accesses using the MMU index of the CPU
in secure state, even though the CPU is currently in non-secure
state. Write arm_v7m_mmu_idx_for_secstate() to do this job,
and use it in cpu_mmu_index().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-17-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
fe768788d2 target/arm: Fix calculation of secure mm_idx values
In cpu_mmu_index() we try to do this:
        if (env->v7m.secure) {
            mmu_idx += ARMMMUIdx_MSUser;
        }
but it will give the wrong answer, because ARMMMUIdx_MSUser
includes the 0x40 ARM_MMU_IDX_M field, and so does the
mmu_idx we're adding to, and we'll end up with 0x8n rather
than 0x4n. This error is then nullified by the call to
arm_to_core_mmu_idx() which masks out the high part, but
we're about to factor out the code that calculates the
ARMMMUIdx values so it can be used without passing it through
arm_to_core_mmu_idx(), so fix this bug first.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-16-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
35337cc391 target/arm: Implement security attribute lookups for memory accesses
Implement the security attribute lookups for memory accesses
in the get_phys_addr() functions, causing these to generate
various kinds of SecureFault for bad accesses.

The major subtlety in this code relates to handling of the
case when the security attributes the SAU assigns to the
address don't match the current security state of the CPU.

In the ARM ARM pseudocode for validating instruction
accesses, the security attributes of the address determine
whether the Secure or NonSecure MPU state is used. At face
value, handling this would require us to encode the relevant
bits of state into mmu_idx for both S and NS at once, which
would result in our needing 16 mmu indexes. Fortunately we
don't actually need to do this because a mismatch between
address attributes and CPU state means either:
 * some kind of fault (usually a SecureFault, but in theory
   perhaps a UserFault for unaligned access to Device memory)
 * execution of the SG instruction in NS state from a
   Secure & NonSecure code region

The purpose of SG is simply to flip the CPU into Secure
state, so we can handle it by emulating execution of that
instruction directly in arm_v7m_cpu_do_interrupt(), which
means we can treat all the mismatch cases as "throw an
exception" and we don't need to encode the state of the
other MPU bank into our mmu_idx values.

This commit doesn't include the actual emulation of SG;
it also doesn't include implementation of the IDAU, which
is a per-board way to specify hard-coded memory attributes
for addresses, which override the CPU-internal SAU if they
specify a more secure setting than the SAU is programmed to.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-15-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
9901c576f6 nvic: Implement Security Attribution Unit registers
Implement the register interface for the SAU: SAU_CTRL,
SAU_TYPE, SAU_RNR, SAU_RBAR and SAU_RLAR. None of the
actual behaviour is implemented here; registers just
read back as written.

When the CPU definition for Cortex-M33 is eventually
added, its initfn will set cpu->sau_sregion, in the same
way that we currently set cpu->pmsav7_dregion for the
M3 and M4.

Number of SAU regions is typically a configurable
CPU parameter, but this patch doesn't provide a
QEMU CPU property for it. We can easily add one when
we have a board that requires it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-14-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
d3392718e1 target/arm: Add v8M support to exception entry code
Add support for v8M and in particular the security extension
to the exception entry code. This requires changes to:
 * calculation of the exception-return magic LR value
 * push the callee-saves registers in certain cases
 * clear registers when taking non-secure exceptions to avoid
   leaking information from the interrupted secure code
 * switch to the correct security state on entry
 * use the vector table for the security state we're targeting

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-13-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:49 +01:00
Peter Maydell
907bedb3f3 target/arm: Add support for restoring v8M additional state context
For v8M, exceptions from Secure to Non-Secure state will save
callee-saved registers to the exception frame as well as the
caller-saved registers. Add support for unstacking these
registers in exception exit when necessary.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-12-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
bfb2eb5278 target/arm: Update excret sanity checks for v8M
In v8M, more bits are defined in the exception-return magic
values; update the code that checks these so we accept
the v8M values when the CPU permits them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-11-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
bed079da04 target/arm: Add new-in-v8M SFSR and SFAR
Add the new M profile Secure Fault Status Register
and Secure Fault Address Register.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-10-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
4e4259d3c5 target/arm: Don't warn about exception return with PC low bit set for v8M
In the v8M architecture, return from an exception to a PC which
has bit 0 set is not UNPREDICTABLE; it is defined that bit 0
is discarded [R_HRJH]. Restrict our complaint about this to v7M.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-9-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
cb484f9a6e target/arm: Warn about restoring to unaligned stack
Attempting to do an exception return with an exception frame that
is not 8-aligned is UNPREDICTABLE in v8M; warn about this.
(It is not UNPREDICTABLE in v7M, and our implementation can
handle the merely-4-aligned case fine, so we don't need to
do anything except warn.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-8-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
224e0c300a target/arm: Check for xPSR mismatch usage faults earlier for v8M
ARM v8M specifies that the INVPC usage fault for mismatched
xPSR exception field and handler mode bit should be checked
before updating the PSR and SP, so that the fault is taken
with the existing stack frame rather than by pushing a new one.
Perform this check in the right place for v8M.

Since v7M specifies in its pseudocode that this usage fault
check should happen later, we have to retain the original
code for that check rather than being able to merge the two.
(The distinction is architecturally visible but only in
very obscure corner cases like attempting an invalid exception
return with an exception frame in read only memory.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-7-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
3f0cddeee1 target/arm: Restore SPSEL to correct CONTROL register on exception return
On exception return for v8M, the SPSEL bit in the EXC_RETURN magic
value should be restored to the SPSEL bit in the CONTROL register
banked specified by the EXC_RETURN.ES bit.

Add write_v7m_control_spsel_for_secstate() which behaves like
write_v7m_control_spsel() but allows the caller to specify which
CONTROL bank to use, reimplement write_v7m_control_spsel() in
terms of it, and use it in exception return.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-6-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:48 +01:00
Peter Maydell
3919e60b6e target/arm: Restore security state on exception return
Now that we can handle the CONTROL.SPSEL bit not necessarily being
in sync with the current stack pointer, we can restore the correct
security state on exception return. This happens before we start
to read registers off the stack frame, but after we have taken
possible usage faults for bad exception return magic values and
updated CONTROL.SPSEL.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-5-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:47 +01:00
Peter Maydell
de2db7ec89 target/arm: Prepare for CONTROL.SPSEL being nonzero in Handler mode
In the v7M architecture, there is an invariant that if the CPU is
in Handler mode then the CONTROL.SPSEL bit cannot be nonzero.
This in turn means that the current stack pointer is always
indicated by CONTROL.SPSEL, even though Handler mode always uses
the Main stack pointer.

In v8M, this invariant is removed, and CONTROL.SPSEL may now
be nonzero in Handler mode (though Handler mode still always
uses the Main stack pointer). In preparation for this change,
change how we handle this bit: rename switch_v7m_sp() to
the now more accurate write_v7m_control_spsel(), and make it
check both the handler mode state and the SPSEL bit.

Note that this implicitly changes the point at which we switch
active SP on exception exit from before we pop the exception
frame to after it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-4-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:47 +01:00
Peter Maydell
5b5223997c target/arm: Don't switch to target stack early in v7M exception return
Currently our M profile exception return code switches to the
target stack pointer relatively early in the process, before
it tries to pop the exception frame off the stack. This is
awkward for v8M for two reasons:
 * in v8M the process vs main stack pointer is not selected
   purely by the value of CONTROL.SPSEL, so updating SPSEL
   and relying on that to switch to the right stack pointer
   won't work
 * the stack we should be reading the stack frame from and
   the stack we will eventually switch to might not be the
   same if the guest is doing strange things

Change our exception return code to use a 'frame pointer'
to read the exception frame rather than assuming that we
can switch the live stack pointer this early.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1506092407-26985-3-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:47 +01:00
Peter Maydell
8ff26a3344 nvic: Clear the vector arrays and prigroup on reset
Reset for devices does not include an automatic clear of the
device state (unlike CPU state, where most of the state
structure is cleared to zero). Add some missing initialization
of NVIC state that meant that the device was left in the wrong
state if the guest did a warm reset.

(In particular, since we were resetting the computed state like
s->exception_prio but not all the state it was computed
from like s->vectors[x].active, the NVIC wound up in an
inconsistent state that could later trigger assertion failures.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1506092407-26985-2-git-send-email-peter.maydell@linaro.org
2017-10-06 16:46:47 +01:00
Thomas Huth
d858914435 hw/arm/xlnx-zynqmp: Mark the "xlnx, zynqmp" device with user_creatable = false
The device uses serial_hds in its realize function and thus can't be
used twice. Apart from that, the comma in its name makes it quite hard
to use for the user anyway, since a comma is normally used to separate
the device name from its properties when using the "-device" parameter
or the "device_add" HMP command.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1506441116-16627-1-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-06 16:46:47 +01:00
Michael Olbrich
8573378e62 hw/sd: fix out-of-bounds check for multi block reads
The current code checks if the next block exceeds the size of the card.
This generates an error while reading the last block of the card.
Do the out-of-bounds check when starting to read a new block to fix this.

This issue became visible with increased error checking in Linux 4.13.

Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20170916091611.10241-1-m.olbrich@pengutronix.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-06 16:46:47 +01:00
Jan Kiszka
77077a8300 arm: Fix SMC reporting to EL2 when QEMU provides PSCI
This properly forwards SMC events to EL2 when PSCI is provided by QEMU
itself and, thus, ARM_FEATURE_EL3 is off.

Found and tested with the Jailhouse hypervisor. Solution based on
suggestions by Peter Maydell.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-id: 4f243068-aaea-776f-d18f-f9e05e7be9cd@siemens.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-06 16:46:47 +01:00
Kevin Wolf
fc3fd63fc0 Block patches
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Merge remote-tracking branch 'mreitz/tags/pull-block-2017-10-06' into queue-block

Block patches

# gpg: Signature made Fri Oct  6 16:30:57 2017 CEST
# gpg:                using RSA key F407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40

* mreitz/tags/pull-block-2017-10-06:
  block/mirror: check backing in bdrv_mirror_top_flush
  qcow2: truncate the tail of the image file after shrinking the image
  qcow2: fix return error code in qcow2_truncate()
  iotests: Fix 195 if IMGFMT is part of TEST_DIR
  block/mirror: check backing in bdrv_mirror_top_refresh_filename
  block: support passthrough of BDRV_REQ_FUA in crypto driver
  block: convert qcrypto_block_encrypt|decrypt to take bytes offset
  block: convert crypto driver to bdrv_co_preadv|pwritev
  block: fix data type casting for crypto payload offset
  crypto: expose encryption sector size in APIs
  block: use 1 MB bounce buffers for crypto instead of 16KB

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-10-06 16:32:08 +02:00
Vladimir Sementsov-Ogievskiy
ce960aa906 block/mirror: check backing in bdrv_mirror_top_flush
Backing may be zero after failed bdrv_append in mirror_start_job,
which leads to SIGSEGV.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170929152255.5431-1-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-10-06 16:30:48 +02:00
Pavel Butsykin
163bc39d2c qcow2: truncate the tail of the image file after shrinking the image
Now after shrinking the image, at the end of the image file, there might be a
tail that probably will never be used. So we can find the last used cluster and
cut the tail.

Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170929121613.25997-3-pbutsykin@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-10-06 16:30:48 +02:00
Pavel Butsykin
76a2a30a99 qcow2: fix return error code in qcow2_truncate()
Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170929121613.25997-2-pbutsykin@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-10-06 16:30:48 +02:00
Max Reitz
47500c6775 iotests: Fix 195 if IMGFMT is part of TEST_DIR
do_run_qemu() in iotest 195 first applies _filter_imgfmt when printing
qemu's command line and _filter_testdir only afterwards.  Therefore, if
the image format is part of the test directory path, _filter_testdir
will no longer apply and the actual output will differ from the
reference output even in case of success.

For example, TEST_DIR might be "/tmp/test-qcow2", in which case
_filter_imgfmt first transforms this to "/tmp/test-IMGFMT" which is no
longer recognized as the TEST_DIR by _filter_testdir.

Fix this by not applying _filter_imgfmt in do_run_qemu() but in
run_qemu() instead, and only after _filter_testdir.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170927211334.3988-1-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-10-06 16:30:47 +02:00
Vladimir Sementsov-Ogievskiy
18775ff326 block/mirror: check backing in bdrv_mirror_top_refresh_filename
Backing may be zero after failed bdrv_attach_child in
bdrv_set_backing_hd, which leads to SIGSEGV.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170928120300.58164-1-vsementsov@virtuozzo.com
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-10-06 16:30:47 +02:00