This is a port to ppc of the i386 commit:
00f4d64 kvmclock: clock should count only if vm is running
We remove timebase_post_load function, and use the VM state
change handler to save and restore the guest_timebase (on stop
and continue).
We keep timebase_pre_save to reduce the clock difference on
migration like in:
6053a86 kvmclock: reduce kvmclock difference on migration
Time base offset has originally been introduced by commit
98a8b52 spapr: Add support for time base offset migration
So while VM is paused, the time is stopped. This allows to have
the same result with date (based on Time Base Register) and
hwclock (based on "get-time-of-day" RTAS call).
Moreover in TCG mode, the Time Base is always paused, so this
patch also adjust the behavior between TCG and KVM.
VM state field "time_of_the_day_ns" is now useless but we keep
it to be able to migrate to older version of the machine.
As vmstate_ppc_timebase structure (with timebase_pre_save() and
timebase_post_load() functions) was only used by vmstate_spapr,
we register the VM state change handler only in ppc_spapr_init().
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
pcr_supported is used to define the supported PCR values for a given
processor. A POWER9 processor can support 3.00, 2.07, 2.06 and 2.05
compatibility modes, thus we set this accordingly.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This logical PVR value now corresponds to ISA version 3.00 so rename it
accordingly.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xvcvhpsp: VSX Vector Convert Half Precision to Single Precision
xvcvsphp: VSX Vector Convert Single Precision to Half Precision
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xscvsdqp: VSX Scalar Convert Signed Doubleword format to
Quad-Precision format
xscvudqp: VSX Scalar Convert Unsigned Doubleword format to
Quad-Precision format
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>
xscmpoqp, xscmpuqp & xscmpexpqp were added before f128 field was
introduced in ppc_vsr_t. Now that we have it, use it instead of
generating the 128 bit float using two 64bit fields.
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>
bcdutrunc. Decimal unsigned truncate. Works like bcdtrunc. with
unsigned BCD numbers.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcdtrunc.: Decimal integer truncate. Given a BCD number in vrb and the
number of bytes to truncate in vra, the return register will have vrb
with such bits truncated.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xscvqpsdz: VSX Scalar truncate & Convert Quad-Precision format to
Signed Doubleword format
xscvqpswz: VSX Scalar truncate & Convert Quad-Precision format to
Signed Word format
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>
bcdsr.: Decimal shift and round. This instruction works like bcds.
however, when performing right shift, 1 will be added to the
result if the last digit was >= 5.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcdus.: Decimal unsigned shift. This instruction works like bcds. but
considers only unsigned BCDs (no sign in least meaning 4 bits).
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcds.: Decimal shift. Given two registers vra and vrb, this instruction
shift the vrb value by vra bits into the result register.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit fixes a warning in the code "(i * 2) ? .. : ..", which
should be better as "i ? .. : ..", and improves the BCD_DIG_BYTE
macro by placing parentheses around its argument to avoid possible
expansion issues like: BCD_DIG_BYTE(i + j).
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xscvqpdp: VSX Scalar round & Convert Quad-Precision format to
Double-Precision format
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>
xscvdpqp: VSX Scalar Convert Double-Precision format to
Quad-Precision format
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>
Once a compatiblity mode is negotiated with the guest,
h_client_architecture_support() uses run_on_cpu() to update each CPU to
the new mode. We're going to want this logic somewhere else shortly,
so make a helper function to do this global update.
We put it in target-ppc/compat.c - it makes as much sense at the CPU level
as it does at the machine level. We also move the cpu_synchronize_state()
into ppc_set_compat(), since it doesn't really make any sense to call that
without synchronizing state.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use correct FP precision when setting FPRF in FP conversion helpers
instead of always assuming float64 precision.
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>
xscvdphp: VSX Scalar round & Convert Double-Precision format to
Half-Precision format
xscvhpdp: VSX Scalar Convert Half-Precision format to
Double-Precision format
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>
Since helper_compute_fprf() works on float64 argument, rename it
to helper_compute_fprf_float64(). Also use a macro to generate
helper_compute_fprf_float64() so that float128 version of the same
helper can be introduced easily later.
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>
Replace isden() by float64_is_zero_or_denormal() so that code in
helper_compute_fprf() can be reused to work with float128 argument.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use float64 argument instead of unit64_t in helper_compute_fprf()
This allows code in helper_compute_fprf() to be reused later to
work with float128 argument too.
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>
xxinsertw: VSX Vector Insert Word
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xxextractuw: VSX Vector Extract Unsigned Word
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Current ppc_set_compat() will attempt to set any compatiblity mode
specified, regardless of whether it's available on the CPU. The caller is
expected to make sure it is setting a possible mode, which is awkwward
because most of the information to make that decision is at the CPU level.
This begins to clean this up by introducing a ppc_check_compat() function
which will determine if a given compatiblity mode is supported on a CPU
(and also whether it lies within specified minimum and maximum compat
levels, which will be useful later). It also contains an assertion that
the CPU has a "virtual hypervisor"[1], that is, that the guest isn't
permitted to execute hypervisor privilege code. Without that, the guest
would own the PCR and so could override any mode set here. Only machine
types which use a virtual hypervisor (i.e. 'pseries') should use
ppc_check_compat().
ppc_set_compat() is modified to validate the compatibility mode it is given
and fail if it's not available on this CPU.
[1] Or user-only mode, which also obviously doesn't allow access to the
hypervisor privileged PCR. We don't use that now, but could in future.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
To continue consolidation of compatibility mode information, this rewrites
the ppc_get_compat_smt_threads() function using the table of compatiblity
modes in target-ppc/compat.c.
It's not a direct replacement, the new ppc_compat_max_threads() function
has simpler semantics - it just returns the number of threads the cpu
model has, taking into account any compatiblity mode it is in.
This no longer takes into account kvmppc_smt_threads() as the previous
version did. That check wasn't useful because we check in
ppc_cpu_realizefn() that CPUs aren't instantiated with more threads
than kvm allows (or if we didn't things will already be broken and
this won't make it any worse).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
This rewrites the ppc_set_compat() function so that instead of open coding
the various compatibility modes, it reads the relevant data from a table.
This is a first step in consolidating the information on compatibility
modes scattered across the code into a single place.
It also makes one change to the logic. The old code masked the bits
to be set in the PCR (Processor Compatibility Register) by which bits
are valid on the host CPU. This made no sense, since it was done
regardless of whether our guest CPU was the same as the host CPU or
not. Furthermore, the actual PCR bits are only relevant for TCG[1] -
KVM instead uses the compatibility mode we tell it in
kvmppc_set_compat(). When using TCG host cpu information usually
isn't even present.
While we're at it, we put the new implementation in a new file to make the
enormous translate_init.c a little smaller.
[1] Actually it doesn't even do anything in TCG, but it will if / when we
get to implementing compatibility mode logic at that level.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
stxvll: Store VSX Vector Left-justified with Length
Vector (8-bit elements) in BE/LE:
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
|“T”|“h”|“i”|“s”|“ ”|“i”|“s”|“ ”|“a”|“ ”|“T”|“E”|“S”|“T”|00|00|
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
Storing 14 bytes would result in following Little/Big-endian Storage:
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
|“T”|“h”|“i”|“s”|“ ”|“i”|“s”|“ ”|“a”|“ ”|“T”|“E”|“S”|“T”|FF|FF|
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
A function to check if all digits of a given BCD number is valid is
here presented because more instructions will need to reuse the
same code.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The structure and corresponding defines and functions need to be used
outside of fpu_helper.c as well.
Add u8, u16, u32 and Int128 to the structure.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The 'cpu_version' field in PowerPCCPU is badly named. It's named after the
'cpu-version' device tree property where it is advertised, but that meaning
may not be obvious in most places it appears.
Worse, it doesn't even really correspond to that device tree property. The
property contains either the processor's PVR, or, if the CPU is running in
a compatibility mode, a special "logical PVR" representing which mode.
Rename the cpu_version field, and a number of related variables to
compat_pvr to make this clearer.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Thomas Huth <thuth@redhat.com>
The pseries machine type is a bit unusual in that it runs a paravirtualized
guest. The guest expects to interact with a hypervisor, and qemu
emulates the functions of that hypervisor directly, rather than executing
hypervisor code within the emulated system.
To implement this in TCG, we need to intercept hypercall instructions and
direct them to the machine's hypercall handlers, rather than attempting to
perform a privilege change within TCG. This is controlled by a global
hook - cpu_ppc_hypercall.
This cleanup makes the handling a little cleaner and more extensible than
a single global variable. Instead, each CPU to have hypercalls intercepted
has a pointer set to a QOM object implementing a new virtual hypervisor
interface. A method in that interface is called by TCG when it sees a
hypercall instruction. It's possible we may want to add other methods in
future.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
bcdsetsgn.: Decimal set sign. This instruction copies the register
value to the result register but adjust the signal according to
the preferred sign value.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcdcpsgn.: Decimal copy sign. Given two registers vra and vrb, it
copies the vra value with vrb sign to the result register vrt.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcdctsq.: Decimal convert to signed quadword. It is possible to
convert packed decimal values to signed quadwords.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
bcdcfsq.: Decimal convert from signed quadword. It is not possible
to convert values less than -10^31-1 or greater than 10^31-1 to be
represented in packed decimal format.
Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
[dwg: Corrected constant which should be 10^16-1 but was 10^17-1]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
stxsd: Store VSX Scalar Dword
stxssp: Store VSX Scalar SP
Moreover, DQ-Form/DS-FORM instructions shares the same primary
opcode(0x3D). For DQ-FORM bits 29:31 are used, for DS-FORM bits 30:31
are used. Common routine to decode primary opcode(0x3D) -
ds-form/dq-form instructions is required.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
lxsd: Load VSX Scalar Dword
lxssp: Load VSX Scalar Single
Moreover, DS-Form instructions shares the same primary opcode, bits
30:31 are used to decode the instruction. Use a common routine to decode
primary opcode(0x39) - ds-form instructions and branch-out depending on
bits 30:31.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
- xscmpodp & xscmpudp are missing flags reset.
- In xscmpodp, VXCC should be set only if VE is 0 for signalling NaN case
and VXCC should be set by explicitly checking for quiet NaN case.
- Comparison is being done only if the operands are not NaNs. However as
per ISA, it should be done even when operands are NaNs.
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>
Add _BIT to CRF_[GT,LT,EQ_SO] and introduce CRF_[GT,LT,EQ,SO] for usage
without shifts in the code. This would simplify the code.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Move instruction decode helpers to target-ppc/internal.h so that some
of these can be used from outside of translate.c. This movement also
helps to get rid of some duplicate helpers from target-ppc/fpu_helper.c.
Suggested-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Current migration code cannot handle some data structures such as
QTAILQ in qemu/queue.h. Here we extend the signatures of put/get
in VMStateInfo so that customized handling is supported. put now
will return int type.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jianjun Duan <duanj@linux.vnet.ibm.com>
Message-Id: <1484852453-12728-2-git-send-email-duanj@linux.vnet.ibm.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Move the generic cpu_synchronize_ functions to the common hw_accel.h header,
in order to prepare for the addition of a second hardware accelerator.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Message-Id: <f5c3cffe8d520011df1c2e5437bb814989b48332.1484045952.git.vpalatin@chromium.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
These are not needed since linux-headers/ provides up-to-date definitions.
The constants are in linux-headers/asm-powerpc/kvm.h.
The sole users, hw/intc/xics_kvm.c and target/ppc/kvm.c, include asm/kvm.h
via sysemu/kvm.h->linux/kvm.h.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Merge remote-tracking branch 'remotes/stsquad/tags/pull-tcg-common-tlb-reset-20170113-r1' into staging
This is the same as the v3 posted except a re-base and a few extra signoffs
# gpg: Signature made Fri 13 Jan 2017 14:26:46 GMT
# gpg: using RSA key 0xFBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>"
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* remotes/stsquad/tags/pull-tcg-common-tlb-reset-20170113-r1:
cputlb: drop flush_global flag from tlb_flush
cpu_common_reset: wrap TCG specific code in tcg_enabled()
qom/cpu: move tlb_flush to cpu_common_reset
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We have never has the concept of global TLB entries which would avoid
the flush so we never actually use this flag. Drop it and make clear
that tlb_flush is the sledge-hammer it has always been.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
[DG: ppc portions]
Acked-by: David Gibson <david@gibson.dropbear.id.au>
It is a common thing amongst the various cpu reset functions want to
flush the SoftMMU's TLB entries. This is done either by calling
tlb_flush directly or by way of a general memset of the CPU
structure (sometimes both).
This moves the tlb_flush call to the common reset function and
additionally ensures it is only done for the CONFIG_SOFTMMU case and
when tcg is enabled.
In some target cases we add an empty end_of_reset_fields structure to the
target vCPU structure so have a clear end point for any memset which
is resetting value in the structure before CPU_COMMON (where the TLB
structures are).
While this is a nice clean-up in general it is also a precursor for
changes coming to cputlb for MTTCG where the clearing of entries
can't be done arbitrarily across vCPUs. Currently the cpu_reset
function is usually called from the context of another vCPU as the
architectural power up sequence is run. By using the cputlb API
functions we can ensure the right behaviour in the future.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
The new typename attribute on query-cpu-definitions will be used
to help management software use device-list-properties to check
which properties can be set using -cpu or -global for the CPU
model.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1479320499-29818-1-git-send-email-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Use the new primitives for RDWINM and RLDICL.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Richard Henderson <rth@twiddle.net>
We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.
Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [crisµblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: Thomas Huth <thuth@redhat.com>
