Now that we have added all the infrastructure we can enable a pseries TCG
guest to use radix.
In order to do this we have to add the appropriate bits to the
ibm,arch-vec-5-platform-support vector to represent that we support both
hash and radix mmu models.
A radix guest can now be booted in pseries tcg mode by specifying:
-cpu POWER9
Note that we assume hash, that is we allocate a hpt, until a guest tells
us otherwise via a H_REGISTER_PROCESS_TABLE call with radix specified - in
which case we free the hpt. If we were right and the guest is hash then
there's nothing for us to do.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
ISA V3.00 introduced a new radix mmu model. Implement the page fault
handler for this so we can run a tcg guest in radix mode and perform
address translation correctly.
In real mode (mmu turned off) addresses are masked to remove the top
4 bits and then are subject to partition scoped translation, since we only
support pseries at this stage it is only necessary to perform the masking
and then we're done.
In virtual mode (mmu turned on) address translation if performed as
follows:
1. Use the quadrant to determine the fully qualified address.
The fully qualified address is defined as the combination of the effective
address, the effective logical partition id (LPID) and the effective
process id (PID). Based on the quadrant (EA63:62) we set the pid and lpid
like so:
quadrant 0: lpid = LPIDR, pid = PIDR
quadrant 1: HV only (not allowed in pseries)
quadrant 2: HV only (not allowed in pseries)
quadrant 3: lpid = LPIDR, pid = 0
If we can't get the fully qualified address we raise a segment interrupt.
2. Find the guest radix tree
We ask the virtual hypervisor for the partition table which was registered
with H_REGISTER_PROC_TBL which points us to the process table in guest
memory. We then index this table by pid to get the process table entry
which points us to the appropriate radix tree to translate the address.
If the process table isn't big enough to contain an entry for the current
pid then we raise a storage interrupt.
3. Walk the radix tree
Next we walk the radix tree where each level is a table of page directory
entries indexed by some number of bits from the effective address, where
the number of bits is determined by the table size. We continue to walk
the tree (while entries are valid and the table is of minimum size) until
we reach a table of page table entries, indicated by having the leaf bit
set. The appropriate pte is then checked for sufficient access permissions,
the reference and change bits are updated and the real address is
calculated from the real page number bits of the pte and the low bits of
the effective address.
If we can't find an entry or can't access the entry bacause of permissions
then we raise a storage interrupt.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
[dwg: Add missing parentheses to macro]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The tlbie[l] instructions are used to invalidate TLB entries used to cache
address translations.
In ISAv3.00 (POWER9) more fields were added to the tblie[l] instructions
which were previously invalid. We don't care about any of these new fields
since we just invalidate the whole world anyway but we need to not
cause an illegal instruction exception when the instructions are called.
We also don't want to allow an older processor to have these fields set
since that would be invalid.
Add a new GEN_HANDLER for the ISAv3 instructions with the correct invalid
mask. These will only be generated to a POWER9 processor for now based on
the instruction flag. Also remove the PPC_MEM_TLBIE instruction flag from
the POWER9 processor definition to ensure the old tlbie isn't generated.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The Guest Translation Shootdown Enable (GTSE) bit in the Logical Partition
Control Register (LPCR) can be set to enable a guest to use the tlbie
instruction directly to invalidate translations.
When the GTSE bit is set then the tlbie instruction is supervisor
privileged, otherwise it is hypervisor privileged.
Add a guest translation shootdown enable (gtse) field to the diassembly
context and use this to check the correct privilege level at code
generation time.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The UPRT and GTSE bits are set when a guest calls H_REGISTER_PROCESS_TABLE
to choose determine how address translation is performed. Currently these
bits in the LPCR are only set for the cpu which handles the H_CALL, however
they need to be set for all cpus for that guest as address translation
cannot be performed differently on a per cpu basis.
Update the H_CALL handler to set these bits in the LPCR correctly for all
cpus of the guest.
Note it is the reponsibility of the guest to ensure that any secondary cpus
are suspended when the H_CALL is made and thus we can safely update these
values here.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The QemuMacDrivers project provides virtualisation drivers for PPC MacOS
guests.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Kernel commit 17d48610ae0f ("KVM: PPC: Book 3S: XICS: Implement ICS
P/Q states") added new bits to the state used by KVM IRQs. Currently,
QEMU does not preserve these bits, so migrating (or otherwise saving
and restoring) the guest state causes the P and Q bits to be cleared.
Clearing the P bit has no effect, because the kernel will set it based
on other data, but the loss of a set Q bit will cause a lost
interrupt.
This patch preserves the P and Q bits, correcting the problem.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
ics_get_kvm_state() "or"s set bits into irq->status but does not mask
out clear bits.
Correct this by initializing the IRQ status to zero before adding bits
to it.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In case when atomic operation is not supported, exit_atomic is called
and we stop the world and execute the atomic operation. This results
in a following call chain:
tcg_gen_atomic_cmpxchg_tl()
-> gen_helper_exit_atomic()
-> HELPER(exit_atomic)
-> cpu_loop_exit_atomic() -> EXCP_ATOMIC
-> qemu_tcg_cpu_thread_fn() => case EXCP_ATOMIC
-> cpu_exec_step_atomic()
-> cpu_step_atomic()
-> cc->cpu_exec_enter() = ppc_cpu_exec_enter()
Sets env->reserve_addr = -1;
But by the time it return back, the reservation is erased and the code
fails, this continues forever and the lock is never taken.
Instead set this in powerpc_excp()
Now that ppc_cpu_exec_enter() doesn't have anything meaningful to do,
let us get rid of the function.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This enables the multi-threaded system emulation by default for PPC64
guests using the x86_64 TCG back-end.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Ensure that the unplugged CPU thread is destroyed and the waiting
thread is notified about it. This is needed for CPU unplug to work
correctly in MTTCG mode.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In case where the conditional write is the first write to the page,
TLB_NOTDIRTY will be set and stop_the_world is triggered. Handle this as
a special case and set the dirty bit. After that fall through to the
actual atomic instruction below.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Emulating LL/SC with cmpxchg is not correct, since it can suffer from
the ABA problem. However, portable parallel code is written assuming
only cmpxchg which means that in practice this is a viable alternative.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Today, when a PowerNV guest runs, it uses the sensor definitions of
the BMC simulator to populate the device tree. But an external IPMI
BMC could also be used and, in that case, it is not (yet) possible to
retrieve the sensor list. Generating the OEM SEL event for shutdown or
reboot also does not make sense as it should be generated on the BMC
side.
This change allows a guest to use an 'ipmi-bmc-extern' backend to the
'isa-ipmi-bt' device and a 'chardev' for transport such as :
-chardev socket,id=ipmi0,host=localhost,port=9002,reconnect=10 \
-device ipmi-bmc-extern,id=bmc0,chardev=ipmi0 \
-device isa-ipmi-bt,bmc=bmc0,irq=10
and connect to a BMC simulator, the OpenIPMI ipmi_sim simulator for
instance.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use the existing readline history function we are utilizing
to provide persistent command history across instances of qmp-shell.
This assists entering debug commands across sessions that may be
interrupted by QEMU sessions terminating, where the qmp-shell has
to be relaunched.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20170427223628.20893-1-jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
SocketAddressLegacy is a simple union, and simple unions are awkward:
they have their variant members wrapped in a "data" object on the
wire, and require additional indirections in C. SocketAddress is the
equivalent flat union. Convert all users of SocketAddressLegacy to
SocketAddress, except for existing external interfaces.
See also commit fce5d53..9445673 and 85a82e8..c5f1ae3.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-7-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Minor editing accident fixed, commit message and a comment tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
The next commit will rename SocketAddressFlat to SocketAddress, and
the commit after that will replace most uses of SocketAddressLegacy by
SocketAddress, replacing most of this commit's renames right back.
Note that checkpatch emits a few "line over 80 characters" warnings.
The long lines are all temporary; the SocketAddressLegacy replacement
will shorten them again.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-5-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
QAPI_CLONE() returns a newly allocated QAPI object. Inconvenient when
we want to clone into an existing object. QAPI_CLONE_MEMBERS() does
exactly that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-4-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
I'm going to flatten SocketAddress: rename SocketAddress to
SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate
SocketAddressLegacy except in external interfaces.
inet_parse() returns a newly allocated InetSocketAddress. Lift the
allocation from inet_parse() into its caller socket_parse() to prepare
for flattening SocketAddress.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-3-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Straightforward rebase]
I'm going to flatten SocketAddress: rename SocketAddress to
SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate
SocketAddressLegacy except in external interfaces.
vsock_parse() returns a newly allocated VsockSocketAddress. Lift the
allocation from vsock_parse() into its caller socket_parse() to
prepare for flattening SocketAddress.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-2-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Commit 62c39b3 introduced test-qga, and at face value, appears
to be testing the 'guest-sync' behavior that is recommended for
guests in sending 0xff to QGA to force the parser to reset. But
this aspect of the test has never actually done anything: the
qmp_fd() call chain converts its string argument into QObject,
then converts that QObject back to the actual string that is
sent over the wire - and the conversion process silently drops
the 0xff byte from the string sent to QGA, thus never resetting
the QGA parser.
An upcoming patch will get rid of the wasteful round trip
through QObject, at which point the string in test-qga will be
directly sent over the wire.
But fixing qmp_fd() to actually send 0xff over the wire is not
all we have to do - the actual QMP parser loudly complains that
0xff is not valid JSON, and sends an error message _prior_ to
actually parsing the 'guest-sync' or 'guest-sync-delimited'
command. With 'guest-sync', we cannot easily tell if this error
message is a result of our command - which is WHY we invented
the 'guest-sync-delimited' command. So for the testsuite, fix
things to only check 0xff behavior on 'guest-sync-delimited',
and to loop until we've consumed all garbage prior to the
requested delimiter, which is compatible with the documented actions
that a real QGA client is supposed to do.
Ideally, we'd fix the QGA JSON parser to silently ignore 0xff
rather than sending an error message back, at which point we
could enhance this test for 'guest-sync' as well as for
'guest-sync-delimited'. But for the sake of this patch, our
testing of 'guest-sync' is no worse than it was pre-patch,
because we have never been sending 0xff over the wire in the
first place.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-11-eblake@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[Additional comment squashed in, along with matching commit message
update]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Use the preferred blockdev-change-medium command instead.
Also, use of 'device' is deprecated; adding an explicit id on
the command line lets us use 'id' for both blockdev-change-medium
and eject.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-10-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Noticed while investigating Coccinelle cleanups. There is no need
for a temporary variable when we can use the new macro to do the
same thing with less typing.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-9-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Noticed while checking Coccinelle results. Naming a label 'out:'
when it is only used on error paths is weird. Also, we had some
dead stores to 'ret'. Meanwhile we know that snapshot_options
is NULL on success and that QDECREF(NULL) is safe. So merge the
two exit paths into one by careful control over bs_snapshot.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-8-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
We now have macros in place to make it less verbose to add a scalar
to QDict and QList, so use them.
Patch created mechanically via:
spatch --sp-file scripts/coccinelle/qobject.cocci \
--macro-file scripts/cocci-macro-file.h --dir . --in-place
then touched up manually to fix a couple of '?:' back to original
spacing, as well as avoiding a long line in monitor.c.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-7-eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Rather than making lots of callers wrap a scalar in a QInt, QString,
or QBool, provide helper macros that do the wrapping automatically.
Update the Coccinelle script to make mass conversions easy, although
the conversion itself will be done as a separate patches to ease
review and backport efforts.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-6-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
We have macros in place to make it less verbose to add a subtype
of QObject to both QDict and QList. While we have made cleanups
like this in the past (see commit fcfcd8ffc, for example), having
it be automated by Coccinelle makes it easier to maintain.
Patch created mechanically via:
spatch --sp-file scripts/coccinelle/qobject.cocci \
--macro-file scripts/cocci-macro-file.h --dir . --in-place
then I verified that no manual touchups were required.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-5-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
We have macros in place to make it less verbose to add a subtype
of QObject to both QDict and QList. While we have made cleanups
like this in the past (see commit fcfcd8ffc, for example), having
it be automated by Coccinelle makes it easier to maintain.
The script is separate from the cleanups, for ease of review and
backporting. A later patch will then add further possible cleanups.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-4-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
No one outside of pcie_aer.h was using error injection; mark them
static for internal use.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-3-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
It's simpler to just use a C struct than it is to bundle things
into a QDict in one function just to pull them back out in the
caller. Plus, doing this gets rid of one more user of dynamic
JSON through qobject_from_jsonf(), as well as a memory leak of
the QDict.
While cleaning the code, fix things to report all errors (the
code was previously silently ignoring a failure of
pcie_aer_inject_error(), at a distance).
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170427215821.19397-2-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Gcc 7 (on Fedora 26) spotted odd use of integers instead of a
boolean; it's got a point.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20170406154107.9178-1-dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
but it'll come in the next pull request.
* use GDB XML register description for x86
* use _Static_assert in QEMU_BUILD_BUG_ON
* add "R:" to MAINTAINERS and get_maintainers
* checkpatch improvements
* dump threading fixes
* first part of vhost-user-scsi support
* QemuMutex tracing
* vmw_pvscsi and megasas fixes
* sgabios module update
* use Rev3 (ACPI 2.0) FADT
* deprecate -hdachs
* improve -accel documentation
* hax fix
* qemu-char GSource bugfix
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Merge remote-tracking branch 'bonzini/tags/for-upstream' into staging
A large set of small patches. I have not included yet vhost-user-scsi,
but it'll come in the next pull request.
* use GDB XML register description for x86
* use _Static_assert in QEMU_BUILD_BUG_ON
* add "R:" to MAINTAINERS and get_maintainers
* checkpatch improvements
* dump threading fixes
* first part of vhost-user-scsi support
* QemuMutex tracing
* vmw_pvscsi and megasas fixes
* sgabios module update
* use Rev3 (ACPI 2.0) FADT
* deprecate -hdachs
* improve -accel documentation
* hax fix
* qemu-char GSource bugfix
# gpg: Signature made Fri 05 May 2017 06:10:40 AM EDT
# gpg: using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* bonzini/tags/for-upstream: (21 commits)
vhost-scsi: create a vhost-scsi-common abstraction
libvhost-user: replace vasprintf() to fix build
get_maintainer: add subsystem to reviewer output
get_maintainer: --r (list reviewer) is on by default
get_maintainer: it's '--pattern-depth', not '-pattern-depth'
get_maintainer: Teach get_maintainer.pl about the new "R:" tag
MAINTAINERS: Add "R:" tag for self-appointed reviewers
Fix the -accel parameter and the documentation for 'hax'
dump: Acquire BQL around vm_start() in dump thread
hax: Fix memory mapping de-duplication logic
checkpatch: Disallow glib asserts in main code
trace: add qemu mutex lock and unlock trace events
vmw_pvscsi: check message ring page count at initialisation
sgabios: update for "fix wrong video attrs for int 10h,ah==13h"
scsi: avoid an off-by-one error in megasas_mmio_write
vl: deprecate the "-hdachs" option
use _Static_assert in QEMU_BUILD_BUG_ON
target/i386: Add GDB XML register description support
char: Fix removing wrong GSource that be found by fd_in_tag
hw/i386: Build-time assertion on pc/q35 reset register being identical.
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
