Expand out STATUS_PARAM wherever it is used and delete the definition.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Version: GnuPG v1
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Merge remote-tracking branch 'remotes/stefanha/tags/net-pull-request' into staging
# gpg: Signature made Fri 06 Feb 2015 14:10:40 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
* remotes/stefanha/tags/net-pull-request:
monitor: more accurate completion for host_net_remove()
net: del hub port when peer is deleted
net: remove the wrong comment in net_init_hubport()
monitor: print hub port name during info network
rtl8139: simplify timer logic
MAINTAINERS: add Jason Wang as net subsystem maintainer
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Current completion for host_net_remove will show hub ports and clients
that were not peered with hub ports. Fix this.
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-id: 1422860798-17495-4-git-send-email-jasowang@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
We should del hub port when peer is deleted since it will not be reused
and will only be freed during exit.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-id: 1422860798-17495-3-git-send-email-jasowang@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Pavel Dovgalyuk reports that TimerExpire and the timer are not restored
correctly on the receiving end of migration.
It is not clear to me whether this is really the case, but we can take
the occasion to get rid of the complicated code that computes PCSTimeout
on the fly upon changes to IntrStatus/IntrMask. Just always keep a
timer running, it will fire every ~130 seconds at most if the interrupt
is masked with TimerInt != 0.
This makes rtl8139_set_next_tctr_time idempotent (when the virtual clock
is stopped between two calls, as is the case during migration).
Tested with Frediano's qtest.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1421765099-26190-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
When debugging migration it's useful to know the PID of
each trace message so you can figure out if it came from the source
or the destination.
Printing the time makes it easy to do latency measurements or timings
between trace points.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 1421746875-9962-1-git-send-email-dgilbert@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
fix mc146818rtc wrong subsection name to avoid vmstate_subsection_load() fail
during incoming migration or loadvm.
Signed-off-by: Zhang Haoyu <zhanghy@sangfor.com.cn>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Turn all the D/DD/DDDPRINTFs into trace events
Turn most of the fprintf(stderr, into error_report
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This patch adds a python tool to the scripts directory that can read
a dumped migration stream if it contains the JSON description of the
device states. I constructs a human readable JSON stream out of it.
It's very simple to use:
$ qemu-system-x86_64
(qemu) migrate "exec:cat > mig"
$ ./scripts/analyze_migration.py -f mig
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
One of the annoyances of the current migration format is the fact that
it's not self-describing. In fact, it's not properly describing at all.
Some code randomly scattered throughout QEMU elaborates roughly how to
read and write a stream of bytes.
We discussed an idea during KVM Forum 2013 to add a JSON description of
the migration protocol itself to the migration stream. This patch
adds a section after the VM_END migration end marker that contains
description data on what the device sections of the stream are composed of.
This approach is backwards compatible with any QEMU version reading the
stream, because QEMU just stops reading after the VM_END marker and ignores
any data following it.
With an additional external program this allows us to decipher the
contents of any migration stream and hopefully make migration bugs easier
to track down.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
For ftell we flush the output buffer to ensure that we don't have anything
lingering in our internal buffers. This is a very safe thing to do.
However, with the dynamic size measurement that the dynamic vmstate
description will bring this would turn out quite slow.
Instead, we can fast path this specific measurement and just take the
internal buffers into account when telling the kernel our position.
I'm sure I overlooked some corner cases where this doesn't work, so
instead of tuning the safe, existing version, this patch adds a fast
variant of ftell that gets used by the dynamic vmstate description code
which isn't critical when it fails.
Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
To support programmatic JSON assembly while keeping the code that generates it
readable, this patch introduces a simple JSON writer. It emits JSON serially
into a buffer in memory.
The nice thing about this writer is its simplicity and low memory overhead.
Unlike the QMP JSON writer, this one does not need to spawn QObjects for every
element it wants to represent.
This is a prerequisite for the migration stream format description generator.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Mostly on the load side, so that when we get a complaint about
a migration failure we can figure out what it didn't like.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Convert a bunch of fprintfs to error_reports
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Commit 22382bb96c renamed the
'hw_cursor_x' and 'hw_cursor_y' fields in cirrus_vga. Update the static
checker's whitelist to allow matching against the old and new names.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Memory allocated with GLib needs to be freed with GLib. Freeing it
with free() instead of g_free() is a common error. Harmless when
g_free() is a trivial wrapper around free(), which is commonly the
case. But model the difference anyway.
In a local scan, this flags four ALLOC_FREE_MISMATCH. Requires
--enable ALLOC_FREE_MISMATCH, because the checker is still preview.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Without a model, Coverity can't know that the result of g_strdup()
needs to be fed to g_free().
One way to get such a model is to scan GLib, build a derived model
file with cov-collect-models, and use that when scanning QEMU.
Unfortunately, the Coverity Scan service we use doesn't support that.
Thus, we're stuck with the other way: write a user model. Doing that
for all of GLib is hardly practical. I'm doing it for the "String
Utility Functions" we actually use that return dynamically allocated
strings.
In a local scan, this flags 20 additional RESOURCE_LEAKs. The ones I
checked look genuine.
It also loses a NULL_RETURNS about ppce500_init() using
qemu_find_file() without error checking. I don't understand why.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
In current versions of GLib, g_new() may expand into g_malloc_n().
When it does, Coverity can't see the memory allocation, because we
don't model g_malloc_n(). Similarly for g_new0(), g_renew(),
g_try_new(), g_try_new0(), g_try_renew().
Model g_malloc_n(), g_malloc0_n(), g_realloc_n(). Model
g_try_malloc_n(), g_try_malloc0_n(), g_try_realloc_n() by adding
indeterminate out of memory conditions on top.
To avoid undue duplication, replace the existing models for g_malloc()
& friends by trivial wrappers around g_malloc_n() & friends.
In a local scan, this flags four additional RESOURCE_LEAKs and one
NULL_RETURNS.
The NULL_RETURNS is a false positive: Coverity can now see that
g_try_malloc(l1_sz * sizeof(uint64_t)) in
qcow2_check_metadata_overlap() may return NULL, but is too stupid to
recognize that a loop executing l1_sz times won't be entered then.
Three out of the four RESOURCE_LEAKs appear genuine. The false
positive is in ppce500_prep_device_tree(): the pointer dies, but a
pointer to a struct member escapes, and we get the pointer back for
freeing with container_of(). Too funky for Coverity.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
* refactor/clean up armv7m_init()
* some initial cleanup in the direction of supporting 64-bit EL3
* fix broken synchronization of registers between QEMU and KVM
for 32-bit ARM hosts (which among other things broke memory
access via gdbstub)
* fix flush-to-zero handling in FMULX, FRECPS, FRSQRTS and FRECPE
* don't crash QEMU for UNPREDICTABLE BFI insns in A32 encoding
* explain why virt board's device-to-transport mapping code is
the way it is
* implement mmu_idx values which match the architectural
distinctions, and introduce the concept of a translation
regime to get_phys_addr() rather than incorrectly looking
at the current CPU state
* update to upstream VIXL 1.7 (gives us correct code addresses
when dissassembling pc-relative references)
* sync system register state between KVM and QEMU for 64-bit ARM
* support virtio on big-endian guests by implementing the
"which endian is the guest now?" CPU method
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20150205' into staging
target-arm queue:
* refactor/clean up armv7m_init()
* some initial cleanup in the direction of supporting 64-bit EL3
* fix broken synchronization of registers between QEMU and KVM
for 32-bit ARM hosts (which among other things broke memory
access via gdbstub)
* fix flush-to-zero handling in FMULX, FRECPS, FRSQRTS and FRECPE
* don't crash QEMU for UNPREDICTABLE BFI insns in A32 encoding
* explain why virt board's device-to-transport mapping code is
the way it is
* implement mmu_idx values which match the architectural
distinctions, and introduce the concept of a translation
regime to get_phys_addr() rather than incorrectly looking
at the current CPU state
* update to upstream VIXL 1.7 (gives us correct code addresses
when dissassembling pc-relative references)
* sync system register state between KVM and QEMU for 64-bit ARM
* support virtio on big-endian guests by implementing the
"which endian is the guest now?" CPU method
# gpg: Signature made Thu 05 Feb 2015 14:02:16 GMT using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
* remotes/pmaydell/tags/pull-target-arm-20150205: (28 commits)
target-arm: fix for exponent comparison in recpe_f64
target-arm: Guest cpu endianness determination for virtio KVM ARM/ARM64
target-arm: KVM64: Get and Sync up guest register state like kvm32.
disas/arm-a64.cc: Tell libvixl correct code addresses
disas/libvixl: Update to upstream VIXL 1.7
target-arm: Fix brace style in reindented code
target-arm: Reindent ancient page-table-walk code
target-arm: Use mmu_idx in get_phys_addr()
target-arm: Pass mmu_idx to get_phys_addr()
target-arm: Split AArch64 cases out of ats_write()
target-arm: Don't define any MMU_MODE*_SUFFIXes
target-arm: Use correct mmu_idx for unprivileged loads and stores
target-arm: Define correct mmu_idx values and pass them in TB flags
target-arm/translate-a64: Fix wrong mmu_idx usage for LDT/STT
target-arm: Make arm_current_el() return sensible values for M profile
cpu_ldst.h: Allow NB_MMU_MODES to be 7
hw/arm/virt: explain device-to-transport mapping in create_virtio_devices()
target-arm: check that LSB <= MSB in BFI instruction
target-arm: Squash input denormals in FRECPS and FRSQRTS
Fix FMULX not squashing denormalized inputs when FZ is set.
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
f64 exponent in HELPER(recpe_f64) should be compared to 2045 rather than 1023
(FPRecipEstimate in ARMV8 spec). This fixes incorrect underflow handling when
flushing denormals to zero in the FRECPE instructions operating on 64-bit
values.
Signed-off-by: Ildar Isaev <ild@inbox.ru>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This patch implements a fucntion pointer "virtio_is_big_endian"
from "CPUClass" structure for arm/arm64.
Function arm_cpu_is_big_endian() is added to determine and
return the guest cpu endianness to virtio.
This is required for running cross endian guests with virtio on ARM/ARM64.
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Message-id: 1423130382-18640-3-git-send-email-pranavkumar@linaro.org
[PMM: check CPSR_E in env->cpsr_uncached, not env->pstate.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This patch adds:
1. Call write_kvmstate_to_list() and write_list_to_cpustate()
in kvm_arch_get_registers() to sync guest register state.
2. Call write_list_to_kvmstate() in kvm_arch_put_registers()
to sync guest register state.
These changes are already there for kvm32 in target-arm/kvm32.c.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Message-id: 1423130382-18640-2-git-send-email-pranavkumar@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
disassembling relative branches in code which doesn't reside at
what the guest CPU would think its execution address is. Use
the new MapCodeAddress() API to tell libvixl where the code is
from the guest CPU's point of view so it can get the target
addresses right.
Previous disassembly:
0x0000000040000000: 580000c0 ldr x0, pc+24 (addr 0x7f6cb7020434)
0x0000000040000004: aa1f03e1 mov x1, xzr
0x0000000040000008: aa1f03e2 mov x2, xzr
0x000000004000000c: aa1f03e3 mov x3, xzr
0x0000000040000010: 58000084 ldr x4, pc+16 (addr 0x7f6cb702042c)
0x0000000040000014: d61f0080 br x4
Fixed disassembly:
0x0000000040000000: 580000c0 ldr x0, pc+24 (addr 0x40000018)
0x0000000040000004: aa1f03e1 mov x1, xzr
0x0000000040000008: aa1f03e2 mov x2, xzr
0x000000004000000c: aa1f03e3 mov x3, xzr
0x0000000040000010: 58000084 ldr x4, pc+16 (addr 0x40000020)
0x0000000040000014: d61f0080 br x4
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1422274779-13359-3-git-send-email-peter.maydell@linaro.org
Update our copy of libvixl to upstream's 1.7 release.
This includes upstream's fix for the issue we had a local
patch for in commit 94cc44a9e.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1422274779-13359-2-git-send-email-peter.maydell@linaro.org
This patch fixes the brace style in the code reindented in the
previous commit.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
A few of the oldest parts of the page-table-walk code have broken indent
(either hardcoded tabs or two-spaces). Reindent these sections.
For ease of review, this patch does not touch the brace style and
so is a whitespace-only change.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Now we have the mmu_idx in get_phys_addr(), use it correctly to
determine the behaviour of virtual to physical address translations,
rather than using just an is_user flag and the current CPU state.
Some TODO comments have been added to indicate where changes will
need to be made to add EL2 and 64-bit EL3 support.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Make all the callers of get_phys_addr() pass it the correct
mmu_idx rather than just a simple "is_user" flag. This includes
properly decoding the AT/ATS system instructions; we include the
logic for handling all the opc1/opc2 cases because we'll need
them later for supporting EL2/EL3, even if we don't have the
regdef stanzas yet.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Instead of simply reusing ats_write() as the handler for both AArch32
and AArch64 address translation operations, use a different function
for each with the common code in a third function. This is necessary
because the semantics for selecting the right translation regime are
different; we are only getting away with sharing currently because
we don't support EL2 and only support EL3 in AArch32.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
target-arm doesn't use any of the MMU-mode specific cpu ldst
accessor functions. Suppress their generation by not defining
any of the MMU_MODE*_SUFFIX macros. ("user" and "kernel" are
too simplistic as descriptions of indexes 0 and 1 anyway.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
The MMU index to use for unprivileged loads and stores is more
complicated than we currently implement:
* for A64, it should be "if at EL1, access as if EL0; otherwise
access at current EL"
* for A32/T32, it should be "if EL2, UNPREDICTABLE; otherwise
access as if at EL0".
In both cases, if we want to make the access for Secure EL0
this is not the same mmu_idx as for Non-Secure EL0.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
We currently claim that for ARM the mmu_idx should simply be the current
exception level. However this isn't actually correct -- secure EL0 and EL1
should have separate indexes from non-secure EL0 and EL1 since their
VA->PA mappings may differ. We also will want an index for stage 2
translations when we properly support EL2.
Define and document all seven mmu index values that we require, and
pass the mmu index in the TB flags rather than exception level or
priv/user bit.
This change doesn't update the get_phys_addr() code, so our page
table walking still assumes a simplistic "user or priv?" model for
the moment.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
---
This leaves some odd gaps in the TB flags usage. I will circle
back and clean this up later (including moving the other common
flags like the singlestep ones to the top of the flags word),
but I didn't want to bloat this patchseries further.
The LDT/STT (load/store unprivileged) instruction decode was using
the wrong MMU index value. This meant that instead of these insns
being "always access as if user-mode regardless of current privilege"
they were "always access as if kernel-mode regardless of current
privilege". This went unnoticed because AArch64 Linux doesn't use
these instructions.
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
I'm not counting this as a security issue because I'm assuming
nobody treats TCG guests as a security boundary (certainly I
would not recommend doing so...)
Although M profile doesn't have the same concept of exception level
as A profile, it does have a notion of privileged versus not, which
we currently track in the privmode TB flag. Support returning this
information if arm_current_el() is called on an M profile core, so
that we can identify the correct MMU index to use (and put the MMU
index in the TB flags) without having to special-case M profile.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Support guest CPUs which need 7 MMU index values.
Add a comment about what would be required to raise the limit
further (trivial for 8, TCG backend rework for 9 or more).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
The documentation states that if LSB > MSB in BFI instruction behaviour
is unpredictable. Currently QEMU crashes because of assertion failure in
this case:
tcg/tcg-op.h:2061: tcg_gen_deposit_i32: Assertion `len <= 32' failed.
While assertion failure may meet the "unpredictable" definition this
behaviour is undesirable because it allows an unprivileged guest program
to crash the emulator with the OS and other programs.
This patch addresses the issue by throwing illegal instruction exception
if LSB > MSB. Only ARM decoder is affected because Thumb decoder already
has this check in place.
To reproduce issue run the following program
int main(void) {
asm volatile (".long 0x07c00c12" :: );
return 0;
}
compiled with
gcc -marm -static badop_arm.c -o badop_arm
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The helper functions for FRECPS and FRSQRTS have special case
handling that includes checks for zero inputs, so squash input
denormals if necessary before those checks. This fixes incorrect
output when the FPCR DZ bit is set to enable squashing of input
denormals.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
While FMULX returns a 2.0f float when two operators are infinity and
zero, those operators should be unpacked from raw inputs first. Inconsistent
cases would occur when operators are denormalized floats in flush-to-zero
mode. A wrong codepath will be entered and 2.0f will not be returned
without this patch.
Fix by checking whether inputs need to be flushed before running into
different codepaths.
Signed-off-by: Xiangyu Hu <libhu.so@gmail.com>
Message-id: 1422459650-12490-1-git-send-email-libhu.so@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add assertion checking when cpreg structures are registered that they
either forbid raw-access attempts or at least make an attempt at
handling them. Also add an assert in the raw-accessor-of-last-resort,
to avoid silently doing a read or write from offset zero, which is
actually AArch32 CPU register r0.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1422282372-13735-3-git-send-email-peter.maydell@linaro.org
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
We currently mark ARM coprocessor/system register definitions with
the flag ARM_CP_NO_MIGRATE for two different reasons:
1) register is an alias on to state that's also visible via
some other register, and that other register is the one
responsible for migrating the state
2) register is not actually state at all (for instance the TLB
or cache maintenance operation "registers") and it makes no
sense to attempt to migrate it or otherwise access the raw state
This works fine for identifying which registers should be ignored
when performing migration, but we also use the same functions for
synchronizing system register state between QEMU and the kernel
when using KVM. In this case we don't want to try to sync state
into registers in category 2, but we do want to sync into registers
in category 1, because the kernel might have picked a different
one of the aliases as its choice for which one to expose for
migration. (In particular, on 32 bit hosts the kernel will
expose the state in the AArch32 version of the register, but
TCG's convention is to mark the AArch64 version as the version
to migrate, even if the CPU being emulated happens to be 32 bit,
so almost all system registers will hit this issue now that we've
added AArch64 system emulation.)
Fix this by splitting the NO_MIGRATE flag in two (ALIAS and NO_RAW)
corresponding to the two different reasons we might not want to
migrate a register. When setting up the TCG list of registers to
migrate we honour both flags; when populating the list from KVM,
only ignore registers which are NO_RAW.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Message-id: 1422282372-13735-2-git-send-email-peter.maydell@linaro.org
[PMM: changed ARM_CP_NO_MIGRATE to ARM_CP_ALIAS on new SP_EL1 and
SP_EL2 reginfo stanzas since there was a (semantic) merge conflict
with the patchset that added those]
Peter Maydell
Jason Wang
Paolo Bonzini
Dr. David Alan Gilbert
Zhang Haoyu
Markus Armbruster
Alexander Graf
Amit Shah
Ildar Isaev
Pranavkumar Sawargaonkar
Laszlo Ersek
Kirill Batuzov
Xiangyu Hu
Greg Bellows