Commit Graph

87914 Commits

Author SHA1 Message Date
Peter Maydell
77f96148f3 target/arm: Move expand_pred_b() data to vec_helper.c
For MVE, we want to re-use the large data table from expand_pred_b().
Move the data table to vec_helper.c so it is no longer in an SVE
specific source file.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-14-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
6390eed45c target/arm: Add framework for MVE decode
Add the framework for decoding MVE insns, with the necessary new
files and the meson.build rules, but no actual content yet.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-11-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
a454ea1e6d target/arm: Implement MVE LETP insn
Implement the MVE LETP insn.  This is like the existing LE loop-end
insn, but it must perform an FPU-enabled check, and on loop-exit it
resets LTPSIZE to 4.

To accommodate the requirement to do something on loop-exit, we drop
the use of condlabel and instead manage both the TB exits manually,
in the same way we already do in trans_WLS().

The other MVE-specific change to the LE insn is that we must raise an
INVSTATE UsageFault insn if LTPSIZE is not 4.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-10-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
40a36f003c target/arm: Implement MVE DLSTP
Implement the MVE DLSTP insn; this is like the existing DLS
insn, except that it must do an FPU access check and it
sets LTPSIZE to the value specified in the insn.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-9-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
6822abfdf8 target/arm: Implement MVE WLSTP insn
Implement the MVE WLSTP insn; this is like the existing WLS insn,
except that it specifies a size value which is used to set
FPSCR.LTPSIZE.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-8-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
76c32d721d target/arm: Implement MVE LCTP
Implement the MVE LCTP instruction.

We put its decode and implementation with the other
low-overhead-branch insns because although it is only present if MVE
is implemented it is logically in the same group as the other LOB
insns.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-7-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
9a486856e9 target/arm: Let vfp_access_check() handle late NOCP checks
In commit a3494d4671 we reworked the M-profile handling of its
checks for when the NOCP exception should be raised because the FPU
is disabled, so that (in line with the architecture) the NOCP check
is done early over a large range of the encoding space, and takes
precedence over UNDEF exceptions.  As part of this, we removed the
code from full_vfp_access_check() which raised an exception there for
M-profile with the FPU disabled, because it was no longer reachable.

For MVE, some instructions which are outside the "coprocessor space"
region of the encoding space must nonetheless do "is the FPU enabled"
checks and possibly raise a NOCP exception.  (In particular this
covers the MVE-specific low-overhead branch insns LCTP, DLSTP and
WLSTP.) To support these insns, reinstate the code in
full_vfp_access_check(), so that their trans functions can call
vfp_access_check() and get the correct behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-6-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
5138bd0143 target/arm: Add handling for PSR.ECI/ICI
On A-profile, PSR bits [15:10][26:25] are always the IT state bits.
On M-profile, some of the reserved encodings of the IT state are used
to instead indicate partial progress through instructions that were
interrupted partway through by an exception and can be resumed.

These resumable instructions fall into two categories:

(1) load/store multiple instructions, where these bits are called
"ICI" and specify the register in the ldm/stm list where execution
should resume.  (Specifically: LDM, STM, VLDM, VSTM, VLLDM, VLSTM,
CLRM, VSCCLRM.)

(2) MVE instructions subject to beatwise execution, where these bits
are called "ECI" and specify which beats in this and possibly also
the following MVE insn have been executed.

There are also a few insns (LE, LETP, and BKPT) which do not use the
ICI/ECI bits but must leave them alone.

Otherwise, we should raise an INVSTATE UsageFault for any attempt to
execute an insn with non-zero ICI/ECI bits.

So far we have been able to ignore ECI/ICI, because the architecture
allows the IMPDEF choice of "always restart load/store multiple from
the beginning regardless of ICI state", so the only thing we have
been missing is that we don't raise the INVSTATE fault for bad guest
code.  However, MVE requires that we honour ECI bits and do not
rexecute beats of an insn that have already been executed.

Add the support in the decoder for handling ECI/ICI:
 * identify the ECI/ICI case in the CONDEXEC TB flags
 * when a load/store multiple insn succeeds, it updates the ECI/ICI
   state (both in DisasContext and in the CPU state), and sets a flag
   to say that the ECI/ICI state was handled
 * if we find that the insn we just decoded did not handle the
   ECI/ICI state, we delete all the code that we just generated for
   it and instead emit the code to raise the INVFAULT.  This allows
   us to avoid having to update every non-MVE non-LDM/STM insn to
   make it check for "is ECI/ICI set?".

We continue with our existing IMPDEF choice of not caring about the
ICI state for the load/store multiples and simply restarting them
from the beginning.  Because we don't allow interrupts in the middle
of an insn, the only way we would see this state is if the guest set
ICI manually on return from an exception handler, so it's a corner
case which doesn't merit optimisation.

ICI update for LDM/STM is simple -- it always zeroes the state.  ECI
update for MVE beatwise insns will be a little more complex, since
the ECI state may include information for the following insn.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-5-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
375256a846 target/arm: Handle VPR semantics in existing code
When MVE is supported, the VPR register has a place on the exception
stack frame in a previously reserved slot just above the FPSCR.
It must also be zeroed in various situations when we invalidate
FPU context.

Update the code which handles the stack frames (exception entry and
exit code, VLLDM, and VLSTM) to save/restore VPR.

Update code which invalidates FP registers (mostly also exception
entry and exit code, but also VSCCLRM and the code in
full_vfp_access_check() that corresponds to the ExecuteFPCheck()
pseudocode) to zero VPR.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-4-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
c485ce2c49 target/arm: Enable FPSCR.QC bit for MVE
MVE has an FPSCR.QC bit similar to the A-profile Neon one; when MVE
is implemented make the bit writeable, both in the generic "load and
store FPSCR" helper functions and in the code for handling the NZCVQC
sysreg which we had previously left as "TODO when we implement MVE".

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210614151007.4545-3-peter.maydell@linaro.org
2021-06-16 14:33:52 +01:00
Peter Maydell
6e802db3c4 target/arm: Provide and use H8 and H1_8 macros
Currently we provide Hn and H1_n macros for accessing the correct
data within arrays of vector elements of size 1, 2 and 4, accounting
for host endianness.  We don't provide any macros for elements of
size 8 because there the host endianness doesn't matter.  However,
this does result in awkwardness where we need to pass empty arguments
to macros, because checkpatch complains about them.  The empty
argument is a little confusing for humans to read as well.

Add H8() and H1_8() macros and use them where we were previously
passing empty arguments to macros.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
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: 20210614151007.4545-2-peter.maydell@linaro.org
Message-id: 20210610132505.5827-1-peter.maydell@linaro.org
2021-06-16 14:33:51 +01:00
Patrick Venture
3ec75e39e6 hw/arm: quanta-q71l add pca954x muxes
Adds the pca954x muxes expected.

Tested: Booted quanta-q71l image to userspace.
Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20210608202522.2677850-4-venture@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-16 14:33:51 +01:00
Patrick Venture
6229659ec8 hw/arm: gsj add pca9548
Tested: Quanta-gsj firmware booted.

i2c /dev entries driver
I2C init bus 1 freq 100000
I2C init bus 2 freq 100000
I2C init bus 3 freq 100000
I2C init bus 4 freq 100000
I2C init bus 8 freq 100000
I2C init bus 9 freq 100000
at24 9-0055: 8192 byte 24c64 EEPROM, writable, 1 bytes/write
I2C init bus 10 freq 100000
at24 10-0055: 8192 byte 24c64 EEPROM, writable, 1 bytes/write
I2C init bus 12 freq 100000
I2C init bus 15 freq 100000
i2c i2c-15: Added multiplexed i2c bus 16
i2c i2c-15: Added multiplexed i2c bus 17
i2c i2c-15: Added multiplexed i2c bus 18
i2c i2c-15: Added multiplexed i2c bus 19
i2c i2c-15: Added multiplexed i2c bus 20
i2c i2c-15: Added multiplexed i2c bus 21
i2c i2c-15: Added multiplexed i2c bus 22
i2c i2c-15: Added multiplexed i2c bus 23
pca954x 15-0075: registered 8 multiplexed busses for I2C switch pca9548

Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20210608202522.2677850-3-venture@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-16 14:33:51 +01:00
Patrick Venture
319466876b hw/arm: gsj add i2c comments
Adds comments to the board init to identify missing i2c devices.

Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20210608202522.2677850-2-venture@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-16 14:33:51 +01:00
Richard Henderson
d3327a38cd target/arm: Fix mte page crossing test
The test was off-by-one, because tag_last points to the
last byte of the tag to check, thus tag_last - prev_page
will equal TARGET_PAGE_SIZE when we use the first byte
of the next page.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/403
Reported-by: Peter Collingbourne <pcc@google.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210612195707.840217-1-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-16 14:33:51 +01:00
Peter Maydell
a25c84c7e0 hw/intc/armv7m_nvic: Remove stale comment
In commit da6d674e50 we split the NVIC code out from the GIC.
This allowed us to specify the NVIC's default value for the num-irq
property (64) in the usual way in its property list, and we deleted
the previous hack where we updated the value in the state struct in
the instance init function.  Remove a stale comment about that hack
which we forgot to delete at that time.

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: 20210614161243.14211-1-peter.maydell@linaro.org
2021-06-15 16:18:48 +01:00
Patrick Venture
1c7f3e248e hw/arm: quanta-gbs-bmc add i2c comments
Add a comment and i2c method that describes the board layout.

Tested: firmware booted to userspace.
Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Brandon Kim <brandonkim@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Message-id: 20210608193605.2611114-3-venture@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Patrick Venture
a8b3ddde6c hw/arm: add quanta-gbs-bmc machine
Adds initial quanta-gbs-bmc machine support.

Tested: Boots to userspace.
Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Brandon Kim <brandonkim@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Message-id: 20210608193605.2611114-2-venture@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Heinrich Schuchardt
75228f0522 hw: virt: consider hw_compat_6_0
virt-6.0 must consider hw_compat_6_0.

Fixes: da7e13c00b ("hw: add compat machines for 6.1")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-id: 20210610183500.54207-1-xypron.glpk@gmx.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Richard Henderson
475d696af7 target/arm: Diagnose UNALLOCATED in disas_simd_three_reg_same_fp16
This fprintf+assert has been in place since the beginning.
It is after to the fp_access_check, so we need to move the
check up.  Fold that in to the pairwise filter.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210604183506.916654-4-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Richard Henderson
0af4d13b31 target/arm: Remove fprintf from disas_simd_mod_imm
The default of this switch is truly unreachable.
The switch selector is 3 bits, and all 8 cases are present.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210604183506.916654-3-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Richard Henderson
cd39e773e0 target/arm: Diagnose UNALLOCATED in disas_simd_two_reg_misc_fp16
This fprintf+assert has been in place since the beginning.
It is prior to the fp_access_check, so we're still good to
raise sigill here.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/381
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210604183506.916654-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Jean-Philippe Brucker
96a664d05c hw/intc/arm_gicv3_cpuif: Tolerate spurious EOIR writes
Commit 382c7160d1 ("hw/intc/arm_gicv3_cpuif: Fix EOIR write access
check logic") added an assert_not_reached() if the guest writes the EOIR
register while no interrupt is active.

It turns out some software does this: EDK2, in
GicV3ExitBootServicesEvent(), unconditionally write EOIR for all
interrupts that it manages. This now causes QEMU to abort when running
UEFI on a VM with GICv3. Although it is UNPREDICTABLE behavior and EDK2
does need fixing, the punishment seems a little harsh, especially since
icc_eoir_write() already tolerates writes of nonexistent interrupt
numbers. Display a guest error and tolerate spurious EOIR writes.

Fixes: 382c7160d1 ("hw/intc/arm_gicv3_cpuif: Fix EOIR write access check logic")
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20210604130352.1887560-1-jean-philippe@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-15 16:18:48 +01:00
Peter Maydell
1ea06abcee Merge misc patches
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Merge remote-tracking branch 'remotes/berrange-gitlab/tags/misc-fixes-pull-request' into staging

Merge misc patches

# gpg: Signature made Mon 14 Jun 2021 15:14:48 BST
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange-gitlab/tags/misc-fixes-pull-request:
  usb/dev-mtp: use GDateTime for formatting timestamp for objects
  block: use GDateTime for formatting timestamp when dumping snapshot info
  migration: use GDateTime for formatting timestamp in snapshot names
  block: remove duplicate trace.h include
  block: add trace point when fdatasync fails
  block: preserve errno from fdatasync failures
  softmmu: add trace point when bdrv_flush_all fails
  migration: add trace point when vm_stop_force_state fails
  sasl: remove comment about obsolete kerberos versions
  docs: recommend SCRAM-SHA-256 SASL mech instead of SHA-1 variant
  docs: document usage of the authorization framework
  docs: document how to pass secret data to QEMU
  docs: add table of contents to QAPI references

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-14 15:59:13 +01:00
Daniel P. Berrangé
970bc16f60 usb/dev-mtp: use GDateTime for formatting timestamp for objects
The GDateTime APIs provided by GLib avoid portability pitfalls, such
as some platforms where 'struct timeval.tv_sec' field is still 'long'
instead of 'time_t'. When combined with automatic cleanup, GDateTime
often results in simpler code too.

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
39683553f9 block: use GDateTime for formatting timestamp when dumping snapshot info
The GDateTime APIs provided by GLib avoid portability pitfalls, such
as some platforms where 'struct timeval.tv_sec' field is still 'long'
instead of 'time_t'. When combined with automatic cleanup, GDateTime
often results in simpler code too.

Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
85cd1cc668 migration: use GDateTime for formatting timestamp in snapshot names
The GDateTime APIs provided by GLib avoid portability pitfalls, such
as some platforms where 'struct timeval.tv_sec' field is still 'long'
instead of 'time_t'. When combined with automatic cleanup, GDateTime
often results in simpler code too.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
99be1ac366 block: remove duplicate trace.h include
Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
60ff2ae2a2 block: add trace point when fdatasync fails
A flush failure is a critical failure scenario for some operations.
For example, it will prevent migration from completing, as it will
make vm_stop() report an error. Thus it is important to have a
trace point present for debugging.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
c7ddc8821d block: preserve errno from fdatasync failures
When fdatasync() fails on a file backend we set a flag that
short-circuits any future attempts to call fdatasync(). The
first failure returns the true errno, but the later short-
circuited calls return a generic EIO. The latter is unhelpful
because fdatasync() can return a variety of errnos, including
EACCESS.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
8af3f5c6d6 softmmu: add trace point when bdrv_flush_all fails
The VM stop process has to flush outstanding I/O and this is a critical
failure scenario that is hard to diagnose. Add a probe point that
records the flush return code.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
626ff6515d migration: add trace point when vm_stop_force_state fails
This is a critical failure scenario for migration that is hard to
diagnose from existing probes. Most likely it is caused by an error
from bdrv_flush(), but we're not logging the errno anywhere, hence
this new probe.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
213de8a2fb sasl: remove comment about obsolete kerberos versions
This is not relevant to any OS distro that QEMU currently targets.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
e2bf32dfab docs: recommend SCRAM-SHA-256 SASL mech instead of SHA-1 variant
The SHA-256 variant better meats modern security expectations.
Also warn that the password file is storing entries in clear
text.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
1c45af36e7 docs: document usage of the authorization framework
The authorization framework provides a way to control access to network
services after a client has been authenticated. This documents how to
actually use it.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
491024a5b4 docs: document how to pass secret data to QEMU
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Daniel P. Berrangé
e0bd0cd43e docs: add table of contents to QAPI references
The QAPI reference docs for the guest agent, storage daemon and QMP are
all rather long and hard to navigate unless you already know the name of
the command and can do full text search for it.

A table of contents in each doc will help people locate stuff much more
easily.

Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-06-14 13:28:50 +01:00
Peter Maydell
fbe7919ece Clean up code_gen_buffer allocation.
Add tcg_remove_ops_after.
 Fix tcg_constant_* documentation.
 Improve TB chaining documentation.
 Fix float32_exp2.
 Fix arm tcg_out_op function signature.
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Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210613' into staging

Clean up code_gen_buffer allocation.
Add tcg_remove_ops_after.
Fix tcg_constant_* documentation.
Improve TB chaining documentation.
Fix float32_exp2.
Fix arm tcg_out_op function signature.

# gpg: Signature made Mon 14 Jun 2021 02:12:35 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-tcg-20210613: (34 commits)
  docs/devel: Explain in more detail the TB chaining mechanisms
  softfloat: Fix tp init in float32_exp2
  tcg/arm: Fix tcg_out_op function signature
  tcg: Fix documentation for tcg_constant_* vs tcg_temp_free_*
  tcg: Introduce tcg_remove_ops_after
  tcg: Move tcg_init_ctx and tcg_ctx from accel/tcg/
  tcg: When allocating for !splitwx, begin with PROT_NONE
  tcg: Merge buffer protection and guard page protection
  tcg: Round the tb_size default from qemu_get_host_physmem
  util/osdep: Add qemu_mprotect_rw
  tcg: Sink qemu_madvise call to common code
  tcg: Return the map protection from alloc_code_gen_buffer
  tcg: Allocate code_gen_buffer into struct tcg_region_state
  tcg: Move in_code_gen_buffer and tests to region.c
  tcg: Tidy split_cross_256mb
  tcg: Tidy tcg_n_regions
  tcg: Rename region.start to region.after_prologue
  tcg: Replace region.end with region.total_size
  tcg: Move MAX_CODE_GEN_BUFFER_SIZE to tcg-target.h
  tcg: Introduce tcg_max_ctxs
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-14 10:25:37 +01:00
Luis Pires
a5a8b84772 docs/devel: Explain in more detail the TB chaining mechanisms
Signed-off-by: Luis Pires <luis.pires@eldorado.org.br>
Message-Id: <20210601125143.191165-1-luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
f291f45f4e softfloat: Fix tp init in float32_exp2
Typo in the conversion to FloatParts64.

Fixes: 572c4d862f
Fixes: Coverity CID 1457457
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210607223812.110596-1-richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Jose R. Ziviani
c372565d08 tcg/arm: Fix tcg_out_op function signature
Commit 5e8892db93 fixed several function signatures but tcg_out_op for
arm is missing. This patch fixes it as well.

Signed-off-by: Jose R. Ziviani <jziviani@suse.de>
Message-Id: <20210610224450.23425-1-jziviani@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
a14b3ad11a tcg: Fix documentation for tcg_constant_* vs tcg_temp_free_*
At some point during the development of tcg_constant_*, I changed
my mind about whether such temps should be able to be passed to
tcg_temp_free_*.  The final version committed allows this, but the
commentary was not updated to match.

Fixes: c0522136ad
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
a80cdd3183 tcg: Introduce tcg_remove_ops_after
Introduce a function to remove everything emitted
since a given point.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
42eb6dfcf1 tcg: Move tcg_init_ctx and tcg_ctx from accel/tcg/
These variables belong to the jit side, not the user side.

Since tcg_init_ctx is no longer used outside of tcg/, move
the declaration to tcg-internal.h.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
b7da02dad0 tcg: When allocating for !splitwx, begin with PROT_NONE
There's a change in mprotect() behaviour [1] in the latest macOS
on M1 and it's not yet clear if it's going to be fixed by Apple.

In this case, instead of changing permissions of N guard pages,
we change permissions of N rwx regions.  The same number of
syscalls are required either way.

[1] https://gist.github.com/hikalium/75ae822466ee4da13cbbe486498a191f

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
22c6a9938f tcg: Merge buffer protection and guard page protection
Do not handle protections on a case-by-case basis in the
various alloc_code_gen_buffer instances; do it within a
single loop in tcg_region_init.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
ba22783d6e tcg: Round the tb_size default from qemu_get_host_physmem
If qemu_get_host_physmem returns an odd number of pages,
then physmem / 8 will not be a multiple of the page size.

The following was observed on a gitlab runner:

ERROR qtest-arm/boot-serial-test - Bail out!
ERROR:../util/osdep.c:80:qemu_mprotect__osdep: \
  assertion failed: (!(size & ~qemu_real_host_page_mask))

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
d7107fc00a util/osdep: Add qemu_mprotect_rw
For --enable-tcg-interpreter on Windows, we will need this.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
cd9ea992e9 tcg: Sink qemu_madvise call to common code
Move the call out of the N versions of alloc_code_gen_buffer
and into tcg_region_init.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00
Richard Henderson
7be9ebcf92 tcg: Return the map protection from alloc_code_gen_buffer
Change the interface from a boolean error indication to a
negative error vs a non-negative protection.  For the moment
this is only interface change, not making use of the new data.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-06-13 17:42:40 -07:00