Commit Graph

62493 Commits

Author SHA1 Message Date
Gerd Hoffmann
cabedbc24e audio/hda: fix CID 1393631
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180702145513.11481-2-kraxel@redhat.com
2018-07-03 11:45:33 +02:00
Gerd Hoffmann
9d340f6755 audio/hda: adjust larger gaps faster
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20180702145513.11481-1-kraxel@redhat.com
2018-07-03 11:45:33 +02:00
Peter Maydell
ab08440a4e Assorted tlb and tb caching fixes
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20180702' into staging

Assorted tlb and tb caching fixes

# gpg: Signature made Mon 02 Jul 2018 17:03:07 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20180702:
  cpu: Assert asidx_from_attrs return value in range
  accel/tcg: Avoid caching overwritten tlb entries
  accel/tcg: Don't treat invalid TLB entries as needing recheck
  accel/tcg: Correct "is this a TLB miss" check in get_page_addr_code()
  tcg: Define and use new tlb_hit() and tlb_hit_page() functions
  translate-all: fix locking of TBs whose two pages share the same physical page

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 17:57:46 +01:00
Peter Maydell
e14dcc9cda seabios: update to release 1.11.2, add/update configuration.
vgabios: remove (old unused lgpl'ed vgabios).
 ramfb,bochs-display: use new vgabios roms.
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Merge remote-tracking branch 'remotes/kraxel/tags/seabios-1.11.2-20180702-pull-request' into staging

seabios: update to release 1.11.2, add/update configuration.
vgabios: remove (old unused lgpl'ed vgabios).
ramfb,bochs-display: use new vgabios roms.

# gpg: Signature made Mon 02 Jul 2018 16:42:06 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/seabios-1.11.2-20180702-pull-request:
  ramfb: enable vgabios
  bochs-display: enable vgabios
  seabios: update bios and vgabios binaries
  vgabios: remove submodule and build rules.
  seabios: enable ide dma
  seabios: add vga configs for bochs-display and ramfb
  seabios: update submodule to release 1.11.2

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 17:04:20 +01:00
Gerd Hoffmann
9f5d9c19c7 ramfb: enable vgabios
Add vgabios binary to fw_cfg vgaroms.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:21:52 +02:00
Gerd Hoffmann
7c538789da bochs-display: enable vgabios
Add vgabios binary to pci rom bar.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:21:52 +02:00
Gerd Hoffmann
cd1bfd5ef3 seabios: update bios and vgabios binaries
Adds two new vgabios binaries, for ramfb and bochs-display.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:20:54 +02:00
Gerd Hoffmann
91b8eba9ec vgabios: remove submodule and build rules.
It's the old, lgpl vgabios implementation.

Was left in as fallback when we switched to seavgabios, so we could
easily switch back in case we see regressions.  It's unused since years
now, reportedly doesn't even build, and lacks support for recently (and
not so recently) added display devices.

Zap it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:20:54 +02:00
Gerd Hoffmann
eda553a442 seabios: enable ide dma
QNX reportedly requires this to boot.
Should also speed up booting other guests.

Note: Upstream seabios defaults this to 'n' to due to known problems
on physical hardware (qemu not affected), and wouldn't flip the default
to 'y'.  So we adjust our local build config accordingly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:20:54 +02:00
Gerd Hoffmann
75056cef41 seabios: add vga configs for bochs-display and ramfb
Both bochs-display and ramfb are devices with a simple framebuffer and
no vga emulation or text mode.  seavgabios has support for text mode
emulation (at vgabios call level), we are using that to provide some
vga compatibility support for these devices.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:20:54 +02:00
Gerd Hoffmann
429d3ae2c8 seabios: update submodule to release 1.11.2
git shortlog rel-1.11.1..rel-1.11.2
-----------------------------------

Gerd Hoffmann (11):
      optionrom: enable non-vga display devices
      cbvga: factor out cbvga_setup_modes()
      qemu: add bochs-display support
      cbvga_setup_modes: use real mode number instead of 0x140
      cbvga_list_modes: don't list current mode twice
      cbvga_set_mode: disable clearmem in windows x86 emulator.
      bochs_display_setup: return error on failure
      pmm: use tmp zone on oom
      vgasrc: add allocate_pmm()
      qemu: add qemu ramfb support
      cbvga_set_mode: refine clear display logic

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-07-02 17:20:30 +02:00
Richard Henderson
9c8c334b06 cpu: Assert asidx_from_attrs return value in range
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:09:49 -07:00
Richard Henderson
68fea03855 accel/tcg: Avoid caching overwritten tlb entries
When installing a TLB entry, remove any cached version of the
same page in the VTLB.  If the existing TLB entry matches, do
not copy into the VTLB, but overwrite it.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:05:16 -07:00
Peter Maydell
4b1a3e1e34 accel/tcg: Don't treat invalid TLB entries as needing recheck
In get_page_addr_code() when we check whether the TLB entry
is marked as TLB_RECHECK, we should not go down that code
path if the TLB entry is not valid at all (ie the TLB_INVALID
bit is set).

Tested-by: Laurent Vivier <laurent@vivier.eu>
Reported-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180629161731.16239-1-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00
Peter Maydell
e4c967a720 accel/tcg: Correct "is this a TLB miss" check in get_page_addr_code()
In commit 71b9a45330 we changed the condition we use
to determine whether we need to refill the TLB in
get_page_addr_code() to
    if (unlikely(env->tlb_table[mmu_idx][index].addr_code !=
                 (addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK)))) {

This isn't the right check (it will falsely fail if the
input addr happens to have the low bit corresponding to
TLB_INVALID_MASK set, for instance). Replace it with a
use of the new tlb_hit() function, which is the correct test.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180629162122.19376-3-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00
Peter Maydell
334692bce7 tcg: Define and use new tlb_hit() and tlb_hit_page() functions
The condition to check whether an address has hit against a particular
TLB entry is not completely trivial. We do this in various places, and
in fact in one place (get_page_addr_code()) we have got the condition
wrong. Abstract it out into new tlb_hit() and tlb_hit_page() inline
functions (one for a known-page-aligned address and one for an
arbitrary address), and use them in all the places where we had the
condition correct.

This is a no-behaviour-change patch; we leave fixing the buggy
code in get_page_addr_code() to a subsequent patch.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180629162122.19376-2-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00
Emilio G. Cota
a688e73ba8 translate-all: fix locking of TBs whose two pages share the same physical page
Commit 0b5c91f ("translate-all: use per-page locking in !user-mode",
2018-06-15) introduced per-page locking. It assumed that the physical
pages corresponding to a TB (at most two pages) are always distinct,
which is wrong. For instance, an xtensa test provided by Max Filippov
is broken by the commit, since the test maps two virtual pages
to the same physical page:

	virt1: 7fff, virt2: 8000
	phys1 6000fff, phys2 6000000

Fix it by removing the assumption from page_lock_pair.
If the two physical page addresses are equal, we only lock
the PageDesc once. Note that the two callers of page_lock_pair,
namely page_unlock_tb and tb_link_page, are also updated so that
we do not try to unlock the same PageDesc twice.

Fixes: 0b5c91f74f
Reported-by: Max Filippov <jcmvbkbc@gmail.com>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1529944302-14186-1-git-send-email-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00
Peter Maydell
7320bb2cb0 s390x updates:
- add bpb/ppa15 features to default cpu model for z196 and later
 - rework TOD handling and fix cpu hotplug under tcg
 - various fixes
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Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20180702' into staging

s390x updates:
- add bpb/ppa15 features to default cpu model for z196 and later
- rework TOD handling and fix cpu hotplug under tcg
- various fixes

# gpg: Signature made Mon 02 Jul 2018 12:09:40 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20180702:
  s390x/tcg: fix locking problem with tcg_s390_tod_updated
  s390x/kvm: indicate alignment in legacy_s390_alloc()
  s390x/kvm: legacy_s390_alloc() only supports one allocation
  s390x/tcg: fix CPU hotplug with single-threaded TCG
  s390x/tcg: rearm the CKC timer during migration
  s390x/tcg: implement SET CLOCK
  s390x/tcg: SET CLOCK COMPARATOR can clear CKC interrupts
  s390x/tcg: properly implement the TOD
  s390x/tcg: drop tod_basetime
  s390x/tod: factor out TOD into separate device
  s390x/kvm: pass values instead of pointers to kvm_s390_set_clock_*()
  s390x/tcg: avoid overflows in time2tod/tod2time
  s390x/cpumodel: default enable bpb and ppa15 for z196 and later
  loader: Check access size when calling rom_ptr() to avoid crashes
  s390/ipl: fix ipl with -no-reboot

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 14:57:43 +01:00
Peter Maydell
2d58e33ec1 Fix move16 instruction disassembly
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Merge remote-tracking branch 'remotes/vivier/tags/m68k-for-3.0-pull-request' into staging

Fix move16 instruction disassembly

# gpg: Signature made Mon 02 Jul 2018 11:25:51 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>"
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier/tags/m68k-for-3.0-pull-request:
  target/m68k: correctly disassemble move16

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 13:43:10 +01:00
Philippe Mathieu-Daudé
646f34fa54 tcg: Fix --disable-tcg build breakage
Fix the --disable-tcg breakage introduced by 8bca9a03ec:

    $ configure --disable-tcg
    [...]
    $ make -C i386-softmmu exec.o
    make: Entering directory 'i386-softmmu'
      CC      exec.o
    In file included from source/qemu/exec.c:62:0:
    source/qemu/include/exec/ram_addr.h:96:6: error: conflicting types for ‘tb_invalidate_phys_range’
     void tb_invalidate_phys_range(ram_addr_t start, ram_addr_t end);
          ^~~~~~~~~~~~~~~~~~~~~~~~
    In file included from source/qemu/exec.c:24:0:
    source/qemu/include/exec/exec-all.h:309:6: note: previous declaration of ‘tb_invalidate_phys_range’ was here
     void tb_invalidate_phys_range(target_ulong start, target_ulong end);
          ^~~~~~~~~~~~~~~~~~~~~~~~
    source/qemu/exec.c:1043:6: error: conflicting types for ‘tb_invalidate_phys_addr’
     void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
          ^~~~~~~~~~~~~~~~~~~~~~~
    In file included from source/qemu/exec.c:24:0:
    source/qemu/include/exec/exec-all.h:308:6: note: previous declaration of ‘tb_invalidate_phys_addr’ was here
     void tb_invalidate_phys_addr(target_ulong addr);
          ^~~~~~~~~~~~~~~~~~~~~~~
    make: *** [source/qemu/rules.mak:69: exec.o] Error 1
    make: Leaving directory 'i386-softmmu'

Tested to build x86_64-softmmu and i386-softmmu targets.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180629200710.27626-1-f4bug@amsat.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 13:42:05 +01:00
Laurent Vivier
d9345f1e1b target/m68k: correctly disassemble move16
"move16 %a0@+,%a1@" and "fmovel (cpid=3) %a0@-,%fpcr"
share the same opcode.

To fix that, backport the fix from binutils:

  2005-11-10  Andreas Schwab  <schwab@suse.de>

     * m68k-dis.c (print_insn_m68k): Only match FPU insns with
     coprocessor ID 1.

Reported-by: Thomas Huth <huth@tuxfamily.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Tested-by: Thomas Huth <huth@tuxfamily.org>
Message-Id: <20180625203559.21370-2-laurent@vivier.eu>
2018-07-02 12:02:00 +02:00
Gerd Hoffmann
3b84967c19 audio/hda: drop atomics
Doesn't build on 32bit clang.  And because we run under qemu mutex
anyway they are not needed.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180627111936.31019-1-kraxel@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 10:48:49 +01:00
David Hildenbrand
30c8db0e21 s390x/tcg: fix locking problem with tcg_s390_tod_updated
tcg_s390_tod_updated() is always called with the iothread being locked
(e.g. from S390TODClass->set() e.g. via HELPER(sck) or on incoming
migration). The helper we call takes the lock itself - bad.

Let's change that by factoring out updating the ckc timer. This now looks
much nicer than having to call a helper from another function.

While touching it we also make sure that env->ckc is updated even if the
new value is -1ULL, for now it would not have been modified in that case.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180629170520.13671-1-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
d44444b074 s390x/kvm: indicate alignment in legacy_s390_alloc()
Let's do this for completeness reason, although we don't support e.g.
PCDIMM/NVDIMM, which would use the alignment for placing the memory
region in guest physical memory. But maybe someday we would want to
support something like this - then we don't forget about this if
allowing multiple allocations in legacy_s390_alloc().

Use the same alignment as we would set in qemu_anon_ram_alloc(). Our
fixed address satisfies this alignment (1MB). This implicitly sets the
alignment of the underlying memory region.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180628113817.30814-3-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
8151942151 s390x/kvm: legacy_s390_alloc() only supports one allocation
We always allocate at a fixed address, a second allocation can therefore
of course never work. We would simply overwrite mappings.

This can e.g. happen in s390_memory_init(), if trying to allocate more
than > 8TB. Let's just bail out, as there is no need for supporting it
(legacy handling for z/VM).

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180628113817.30814-2-david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
d66b43c896 s390x/tcg: fix CPU hotplug with single-threaded TCG
run_on_cpu() doesn't seem to work reliably until the CPU has been fully
created if the single-threaded TCG main loop is already running.

Therefore, hotplugging a CPU under single-threaded TCG does currently
not work. We should use the direct call instead of going via
run_on_cpu().

So let's use run_on_cpu() for KVM only - KVM requires it due to the initial
CPU reset ioctl. As a nice side effect, we get rid of the ifdef.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-10-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
7c12f710ba s390x/tcg: rearm the CKC timer during migration
If the CPU data is migrated after the TOD clock, the CKC timer of a CPU
is not rearmed. Let's rearm it when loading the CPU state.

Introduce tcg-stub.c just like kvm-stub.c for tcg specific stubs.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-9-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
9dc6753718 s390x/tcg: implement SET CLOCK
This allows a guest to change its TOD. We already take care of updating
all CKC timers from within S390TODClass.

Use MO_ALIGN to load the operand manually - this will properly trigger a
SPECIFICATION exception.

Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-8-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
345f1ab96e s390x/tcg: SET CLOCK COMPARATOR can clear CKC interrupts
Let's stop the timer and delete any pending CKC IRQ before doing
anything else.

While at it, add a comment why the check for ckc == -1ULL is needed.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-7-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
7de3b1cdc6 s390x/tcg: properly implement the TOD
Right now, each CPU has its own TOD. Especially, the TOD will differ
based on creation time of a CPU - e.g. when hotplugging a CPU the times
will differ quite a lot, resulting in stall warnings in the guest.

Let's use a single TOD by implementing our new TOD device. Prepare it
for TOD-clock epoch extension.

Most importantly, whenever we set the TOD, we have to update the CKC
timer.

Introduce "tcg_s390x.h" just like "kvm_s390x.h" for tcg specific
function declarations that should not go into cpu.h.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-6-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
f777b20544 s390x/tcg: drop tod_basetime
Never set to anything but 0.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-5-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
8046f374a6 s390x/tod: factor out TOD into separate device
Let's treat this like a separate device. TCG will have to store the
actual state/time later on.

Include cpu-qom.h in kvm_s390x.h (due to S390CPU) to compile tod-kvm.c.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
4ab6a1feac s390x/kvm: pass values instead of pointers to kvm_s390_set_clock_*()
We are going to factor out the TOD into a separate device and use const
pointers for device class functions where possible. We are passing right
now ordinary pointers that should never be touched when setting the TOD.
Let's just pass the values directly.

Note that s390_set_clock() will be removed in a follow-on patch and
therefore its calling convention is not changed.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-3-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
David Hildenbrand
14055ce53c s390x/tcg: avoid overflows in time2tod/tod2time
Big values for the TOD/ns clock can result in some overflows that can be
avoided. Not all overflows can be handled however, as the conversion either
multiplies by 4.096 or divided by 4.096.

Apply the trick used in the Linux kernel in arch/s390/include/asm/timex.h
for tod_to_ns() and use the same trick also for the conversion in the
other direction.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
Christian Borntraeger
8727315111 s390x/cpumodel: default enable bpb and ppa15 for z196 and later
Most systems and host kernels provide the necessary building blocks for
bpb and ppa15. We can reverse the logic and default enable those
features, while still allowing to disable it via cpu model.

So let us add bpb and ppa15 to z196 and later default CPU model for the
qemu 3.0 machine. (like -cpu z13).  Older machine types (e.g.
s390-ccw-virtio-2.12) will retain the old value and not provide those
bits in the default model.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20180626123830.18282-1-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
Thomas Huth
0f0f8b611e loader: Check access size when calling rom_ptr() to avoid crashes
The rom_ptr() function allows direct access to the ROM blobs that we
load during startup. However, there are currently no checks for the
size of the accesses, so it's currently possible to crash QEMU for
example with:

$ echo "Insane in the mainframe" > /tmp/test.txt
$ s390x-softmmu/qemu-system-s390x -kernel /tmp/test.txt -append xyz
Segmentation fault (core dumped)
$ s390x-softmmu/qemu-system-s390x -kernel /tmp/test.txt -initrd /tmp/test.txt
Segmentation fault (core dumped)
$ echo -n HdrS > /tmp/hdr.txt
$ sparc64-softmmu/qemu-system-sparc64 -kernel /tmp/hdr.txt -initrd /tmp/hdr.txt
Segmentation fault (core dumped)

We need a possibility to check the size of the ROM area that we want
to access, thus let's add a size parameter to the rom_ptr() function
to avoid these problems.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1530005740-25254-1-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
Christian Borntraeger
76ed4b18de s390/ipl: fix ipl with -no-reboot
kexec/kdump as well as the bootloader use a subcode of diagnose 308
that is supposed to reset the I/O subsystem but not comprise a full
"reboot". With the latest refactoring this is now broken when
-no-reboot is used or when libvirt acts on a reboot QMP event, for
example a virt-install from iso images.

We need to mark these "subsystem resets" as special.

Fixes: a30fb811cb (s390x: refactor reset/reipl handling)
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180622102928.173420-1-borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
Peter Maydell
281bd28122 target/xtensa updates:
- add diagnostic for zero-overhead loop alignment;
 - convert to TranslatorOps;
 - don't call get_page_addr_code() from helper functions.
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Merge remote-tracking branch 'remotes/xtensa/tags/20180630-xtensa' into staging

target/xtensa updates:

- add diagnostic for zero-overhead loop alignment;
- convert to TranslatorOps;
- don't call get_page_addr_code() from helper functions.

# gpg: Signature made Sat 30 Jun 2018 22:16:30 BST
# gpg:                using RSA key 51F9CC91F83FA044
# gpg: Good signature from "Max Filippov <filippov@cadence.com>"
# gpg:                 aka "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"
# Primary key fingerprint: 2B67 854B 98E5 327D CDEB  17D8 51F9 CC91 F83F A044

* remotes/xtensa/tags/20180630-xtensa:
  xtensa: Avoid calling get_page_addr_code() from helper function
  target/xtensa: Convert to TranslatorOps
  target/xtensa: Change gen_intermediate_code dc to pointer
  target/xtensa: Convert to DisasContextBase
  target/xtensa: Replace DISAS_UPDATE with DISAS_NORETURN
  target/xtensa: check zero overhead loop alignment

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-30 22:23:51 +01:00
Peter Maydell
0f02251a30 xtensa: Avoid calling get_page_addr_code() from helper function
The xtensa frontend calls get_page_addr_code() from its
itlb_hit_test helper function. This function is really part
of the TCG core's internals, and calling it from a target
helper makes it awkward to make changes to that core code.
It also means that we don't pass the correct retaddr to
tlb_fill(), so we won't correctly handle the case where
an exception is generated.

The helper is used for the instructions IHI, IHU and IPFL.

Change it to call cpu_ldb_code_ra() instead.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-30 12:00:17 -07:00
Richard Henderson
9c509ff94e target/xtensa: Convert to TranslatorOps
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-06-30 12:00:17 -07:00
Richard Henderson
1d38a7011f target/xtensa: Change gen_intermediate_code dc to pointer
This will reduce the size of the patch in the next patch,
where the context will have to be a pointer.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-06-30 12:00:17 -07:00
Richard Henderson
3cc18eec0a target/xtensa: Convert to DisasContextBase
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-06-30 12:00:14 -07:00
Richard Henderson
f3531da588 target/xtensa: Replace DISAS_UPDATE with DISAS_NORETURN
The usage of DISAS_UPDATE is after noreturn helpers.
It is thus indistinguishable from DISAS_NORETURN.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-06-30 11:58:03 -07:00
Max Filippov
f40385c959 target/xtensa: check zero overhead loop alignment
ISA book documents that the first instruction of zero overhead loop
must fit completely into naturally aligned region of an instruction
fetch unit size. Check that condition and log a message if it's
violated.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-06-30 11:58:02 -07:00
Peter Maydell
e3800998e6 Monitor patches for 2018-06-30
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Merge remote-tracking branch 'remotes/armbru/tags/pull-monitor-2018-06-30' into staging

Monitor patches for 2018-06-30

# gpg: Signature made Sat 30 Jun 2018 17:22:12 BST
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-monitor-2018-06-30:
  docs: mention shared state protect for OOB
  tests: iotests: drop some stderr line
  monitor: flush qmp responses when CLOSED
  monitor: rename *_pop_one to *_pop_any
  chardev: comment details for CLOSED event

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-30 17:30:09 +01:00
Peter Xu
4bfa7974d9 docs: mention shared state protect for OOB
Out-Of-Band handlers need to protect shared state if there is any.
Mention it in the document.  Meanwhile, touch up some other places too,
either with better English, or reordering of bullets.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-6-peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-30 17:50:48 +02:00
Peter Xu
cbc4ae2d1a tests: iotests: drop some stderr line
In my Out-Of-Band test, "check -qcow2 060" fail with this:

  --- /home/peterx/git/qemu/tests/qemu-iotests/060.out
  +++ /home/peterx/git/qemu/bin/tests/qemu-iotests/060.out.bad
  @@ -427,8 +427,8 @@
  QMP_VERSION
  {"return": {}}
  qcow2: Image is corrupt: L2 table offset 0x2a2a2a00 unaligned (L1
  index: 0); further non-fatal corruption events will be suppressed
  -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_IMAGE_CORRUPTED", "data": {"device": "", "msg": "L2 table offset 0x2a2a2a0
  0 unaligned (L1 index: 0)", "node-name": "drive", "fatal": false}}
  read failed: Input/output error
  +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_IMAGE_CORRUPTED", "data": {"device": "", "msg": "L2 table offset 0x2a2a2a0
  0 unaligned (L1 index: 0)", "node-name": "drive", "fatal": false}}
  {"return": ""}
  {"return": {}}
  {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP},
  "event": "SHUTDOWN", "data": {"guest": false}}

The order of the event and the in/out error line is swapped.  I didn't
dig up the reason, but AFAIU what we want to verify is the event rather
than stderr.  Let's drop the stderr line directly for this test.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-5-peterx@redhat.com>
[Commit message touched up]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-30 17:50:48 +02:00
Peter Xu
c73a843b4a monitor: flush qmp responses when CLOSED
Previously we clean up the queues when we got CLOSED event.  It was used
to make sure we won't send leftover replies/events of a old client to a
new client which makes perfect sense. However this will also drop the
replies/events even if the output port of the previous chardev backend
is still open, which can lead to missing of the last replies/events.
Now this patch does an extra operation to flush the response queue
before cleaning up.

In most cases, a QMP session will be based on a bidirectional channel (a
TCP port, for example, we read/write to the same socket handle), so in
port and out port of the backend chardev are fundamentally the same
port. In these cases, it does not really matter much on whether we'll
flush the response queue since flushing will fail anyway.  However there
can be cases where in & out ports of the QMP monitor's backend chardev
are separated.  Here is an example:

  cat $QMP_COMMANDS | qemu -qmp stdio ... | filter_commands

In this case, the backend is fd-typed, and it is connected to stdio
where in port is stdin and out port is stdout.  Now if we drop all the
events on the response queue then filter_command process might miss some
events that it might expect.  The thing is that, when stdin closes,
stdout might still be there alive!

In practice, I encountered SHUTDOWN event missing when running test with
iotest 087 with Out-Of-Band enabled.  Here is one of the ways that this
can happen (after "quit" command is executed and QEMU quits the main
loop):

1. [main thread] QEMU queues a SHUTDOWN event into response queue.

2. "cat" terminates (to distinguish it from the animal, I quote it).

3. [monitor iothread] QEMU's monitor iothread reads EOF from stdin.

4. [monitor iothread] QEMU's monitor iothread calls the CLOSED event
   hook for the monitor, which will destroy the response queue of the
   monitor, then the SHUTDOWN event is dropped.

5. [main thread] QEMU's main thread cleans up the monitors in
   monitor_cleanup().  When trying to flush pending responses, it sees
   nothing.  SHUTDOWN is lost forever.

Note that before the monitor iothread was introduced, step [4]/[5] could
never happen since the main loop was the only place to detect the EOF
event of stdin and run the CLOSED event hooks.  Now things can happen in
parallel in the iothread.

Without this patch, iotest 087 will have ~10% chance to miss the
SHUTDOWN event and fail when with Out-Of-Band enabled:

  --- /home/peterx/git/qemu/tests/qemu-iotests/087.out
  +++ /home/peterx/git/qemu/bin/tests/qemu-iotests/087.out.bad
  @@ -8,7 +8,6 @@
  {"return": {}}
  {"error": {"class": "GenericError", "desc": "'node-name' must be
  specified for the root node"}}
  {"return": {}}
  -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}

  === Duplicate ID ===
  @@ -53,7 +52,6 @@
  {"return": {}}
  {"return": {}}
  {"return": {}}

  -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}

This patch fixes the problem.

Fixes: 6d2d563f8c ("qmp: cleanup qmp queues properly", 2018-03-27)
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-4-peterx@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message and a comment touched up]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-30 17:50:48 +02:00
Peter Xu
40687eb741 monitor: rename *_pop_one to *_pop_any
The old names are confusing since both of the old functions are popping
an item from multiple queues rather than a single queue.  In that
sense, *_pop_any() suites better than *_pop_one().

Since at it, touch up the function monitor_qmp_response_pop_any() a bit
to let the callers pass in a QMPResponse struct instead of returning a
struct.  Change the return value to boolean to mark whether we have
popped a valid response instead.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-3-peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-30 17:50:48 +02:00
Peter Xu
d88610111b chardev: comment details for CLOSED event
It was unclear before on what does the CLOSED event mean.  Meanwhile we
add a TODO to fix up the CLOSED event in the future when the in/out
ports are different for a chardev.

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "Marc-André Lureau" <marcandre.lureau@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-2-peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-06-30 17:50:48 +02:00