This commit was generated mechanically by coccinelle from the following
semantic patch:
@@
expression val;
@@
- (ffs(val) - 1)
+ ctz32(val)
The call sites have been audited to ensure the ffs(0) - 1 == -1 case
never occurs (due to input validation, asserts, etc). Therefore we
don't need to worry about the fact that ctz32(0) == 32.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1427124571-28598-5-git-send-email-stefanha@redhat.com
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch adds basic support for the VTB.
PowerISA:
The Virtual Time Base (VTB) is a 64-bit incrementing counter.
Virtual Time Base increments at the same rate as the Time Base until its value
becomes 0xFFFF_FFFF_FFFF_FFFF (2 64 - 1); at the next increment its value
becomes 0x0000_0000_0000_0000. There is no interrupt or other indication when
this occurs.
The operation of the Virtual Time Base has the following additional
properties.
1. Loading a GPR from the Virtual Time Base has no effect on the accuracy of
the Virtual Time Base.
2. Copying the contents of a GPR to the Virtual Time Base replaces the
contents of the Virtual Time Base with the contents of the GPR.
Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
We look at two sizes specified in ISA (4K, 64K). If not found matching,
we consider it 16MB.
Without this patch we would fail to lookup address above 16MB range.
Below 16MB happened to work before because the kernel have a liner
mapping and we always looked up hash for 0xc000000000000000. The
actual real address was computed by using the 16MB offset
with the real address found with the above hash.
Without Fix:
(gdb) x/16x 0xc000000001000000
0xc000000001000000 <list_entries+453208>: Cannot access memory at address 0xc000000001000000
(gdb)
With Fix:
(gdb) x/16x 0xc000000001000000
0xc000000001000000 <list_entries+453208>: 0x00000000 0x00000000 0x00000000 0x00000000
0xc000000001000010 <list_entries+453224>: 0x00000000 0x00000000 0x00000000 0x00000000
0xc000000001000020 <list_entries+453240>: 0x00000000 0x00000000 0x00000000 0x00000000
0xc000000001000030 <list_entries+453256>: 0x00000000 0x00000000 0x00000000 0x00000000
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
The TARGET_HAS_ICE #define is intended to indicate whether a target-*
guest CPU implementation supports the breakpoint handling. However,
all our guest CPUs have that support (the only two which do not
define TARGET_HAS_ICE are unicore32 and openrisc, and in both those
cases the bp support is present and the lack of the #define is just
a bug). So remove the #define entirely: all new guest CPU support
should include breakpoint handling as part of the basic implementation.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1420484960-32365-1-git-send-email-peter.maydell@linaro.org
New year's release. This time's highlights:
- E500: More RAM support
- pseries: New SLOF release
- Migration fixes
- Simplify USB spawning logic, removes support for explicit usb=off
- TCG: Simple untansactional TM emulation
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Merge remote-tracking branch 'remotes/agraf/tags/signed-ppc-for-upstream' into staging
Patch queue for ppc - 2015-01-07
New year's release. This time's highlights:
- E500: More RAM support
- pseries: New SLOF release
- Migration fixes
- Simplify USB spawning logic, removes support for explicit usb=off
- TCG: Simple untansactional TM emulation
# gpg: Signature made Wed 07 Jan 2015 15:19:37 GMT using RSA key ID 03FEDC60
# gpg: Good signature from "Alexander Graf <agraf@suse.de>"
# gpg: aka "Alexander Graf <alex@csgraf.de>"
* remotes/agraf/tags/signed-ppc-for-upstream: (37 commits)
hw/ppc/mac_newworld: simplify usb controller creation logic
hw/ppc/spapr: simplify usb controller creation logic
hw/ppc/mac_newworld: QOMified mac99 machines
hw/usb: simplified usb_enabled
hw/machine: added machine_usb wrapper
hw/ppc: modified the condition for usb controllers to be created for some ppc machines
target-ppc: Cast ssize_t to size_t before printing with %zx
target-ppc: Mark SR() and gen_sync_exception() as !CONFIG_USER_ONLY
PPC: e500: Fix GPIO controller interrupt number
target-ppc: Introduce Privileged TM Noops
target-ppc: Introduce tcheck
target-ppc: Introduce TM Noops
target-ppc: Introduce tbegin
target-ppc: Introduce TEXASRU Bit Fields
target-ppc: Power8 Supports Transactional Memory
target-ppc: Introduce tm_enabled Bit to CPU State
target-ppc: Introduce Feature Flag for Transactional Memory
target-ppc: Introduce Instruction Type for Transactional Memory
pseries: Update SLOF firmware image to 20141202
PPC: Fix crash on spapr_tce_table_finalize()
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Define mnemonics for the various bit fields in the Transaction
EXception And Summary Register (TEXASR).
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Add a flag (POWERPC_FLAG_TM) for the Transactional Memory
Facility introduced in Power ISA 2.07.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Add a category (PPC2_TM) for the Transactional Memory instructions
introduced in Power ISA 2.07.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Define and use macros instead of direct numbers wherever
possible in ppc opcodes table handling code.
This doesn't change any code functionality.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch remove limitation for fc[tf]id[*] on 32 bits targets and
add a new insn flag for signed integer 64 conversion PPC2_FP_CVT_S64
Signed-off-by: Pierre Mallard <mallard.pierre@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The device endianness is the cpu endianness at device reset time.
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Decimal Floating Point is emulated, so add it the mask. This will
fix the erroneous message:
Warning: Disabling some instructions which are not emulated by TCG (0x0, 0x4)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds handling of the RESOURCE_ADDR_TRANS_MODE resource from
the H_SET_MODE, for POWER8 (PowerISA 2.07) only.
This defines AIL flags for LPCR special register.
This changes @excp_prefix according to the mode, takes effect in TCG.
This turns support of a new capability PPC2_ISA207S flag for TCG.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
POWER8 supports Event-Based Branch Facility (EBB). It is controlled via
set of SPRs access to which should generate an "Facility Unavailable"
interrupt if the facilities are not enabled in FSCR for problem state.
This adds EBB SPRs.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds migration support for registers saved before Transactional
Memory (TM) transaction started.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds TM (Transactional Memory) SPRs.
This adds generic spr_read_prev_upper32()/spr_write_prev_upper32() to
handle upper half SPRs such as TEXASRU which is upper half of TEXASR.
Since this is not the only register like that and their numbers go
consequently, it makes sense to generalize the helpers.
This adds a gen_msr_facility_check() helper which purpose is to generate
the Facility Unavailable exception if the facility is disabled.
It is a copy of gen_fscr_facility_check() but it checks for enabled
facility in MSR rather than FSCR/HFSCR. It still sets the interrupt cause
in FSCR/HFSCR (whichever is passed to the helper).
This adds spr_read_tm/spr_write_tm/spr_read_tm_upper32/spr_write_tm_upper32
which are used for TM SPRs.
This adds TM-relates MSR bits definitions. This enables TM in POWER8 CPU class'
msr_mask.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds POWER8 specific PMU MMCR2/MMCRS SPRs.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds an FSCR (Facility Status and Control Register) SPR. This defines
names for FSCR bits.
This defines new exception type - POWERPC_EXCP_FU - "facility unavailable" (FU).
This registers an interrupt vector for it at 0xF60 as PowerISA defines.
This adds a TCG helper_fscr_facility_check() helper to raise an exception
if the facility is not enabled. It updates the interrupt cause field
in FSCR. This adds a TCG translation block generation code. The helper
may be used for HFSCR too as it has the same format.
The helper raising FU exceptions is not used by this patch but will be
in the next ones.
This adds gen_update_current_nip() to update NIP in DisasContext.
This helper is not used now and will be called before checking for
a condition for throwing an FU exception.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds TIR (Thread Identification Register) SPR first defined for server
CPUs in PowerISA 2.07.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Previously LPCR was registered for the 970 class which was wrong as
it does not have LPCR. Instead, HID4 is used which this patch registers.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Compared to PowerISA-compliant CPUs, 970 family has most of them plus
PMC7/8 which are only present on 970 but not on POWER5 and later CPUs.
Since we are changing SPRs for Book3s/970 families, let's add them too.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Since we started adding "POWER" prefix to 64bit PMU SPRs, let's finish
the transition and fix MMCRA and define a supermode version of it.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This stops using 7xx common SPRs init function and adds separate set
of helpers for 970.
This does not copy ICTC SPR as neither 970 manual nor PowerISA mention it.
This defines 970/book3s PMU SPRs constants as they differs from the ones
used for 7XX.
This creates 2 helpers for PMU SPRs, one for supermode privileged SPRs and
one for user privileged SPRs as "sup" versions can be shared across
the family while "user" versions will behave different starting POWER8
(which will be addressed later).
This allows writing to Uxxxx SPRs from supermode. spr_write_ureg() is
implemented for this as a copy of already existing spr_read_ureg().
This allows writing to supervisor's SIAR - it used to be disabled
when gen_spr_7xx() was used.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
The differences between classes were:
1. SLB size, was 32 for 970 and 64 for others, should be 64 for all;
2. check_pow() callback, HID0 format is the same so should be the same
0x01C00000 which means "deep nap", "doze" and "nap" bits set;
3. LPCR - 970 does not have it but 970MP had one (by mistake).
This fixes wrong differences and makes one 970 class.
This fixes wrong registration of LPCR which is not present on 970.
This defines HID0 bits and uses them in check_pow_970().
This does not copy MSR_SHV (Hypervisor State, HV) bit from 970FX to
970 class as we do not emulate hypervisor in QEMU anyway.
This does not remove check_pow_970FX now as it is still used by POWER5+
class, this will be addressed later.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
As defined in Linux kernel, PMC*, SIAR, MMCR0/1 have different numbers
for 32 and 64 bit POWERPC. We are going to support 64bit versions too so
let's rename 32bit ones to avoid confusion.
This is a mechanical patch so it does not fix obvious mistake with these
registers in POWER7 yet, this will be fixed later.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Today we have a lot of conditional code in the SPE emulation depending on
whether we have 64bit GPRs or not.
Unfortunately the assumption that we can just recycle the 64bit GPR
implementation is wrong. Normal SPE implementations maintain the upper 32 bits
on all non-SPE instructions which then only modify the low 32 bits. However
all instructions we model that adhere to the normal SF based switching don't
care whether they operate on 32 or 64 bit registers and just always use the full
64 bits.
So let's remove that dubious SPE optimization and revert everything to the same
code path the 32bit target code was taking. That way we get rid of differences
between the two implementations, but will get a slight performance hit when
emulating SPE instructions.
This fixes SPE emulation with qemu-system-ppc64 for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
This puts a limit to the number of threads per core based on the current
compatibility mode. Although PowerISA specs do not specify the maximum
threads per core number, the linux guest still expects that
PowerISA2.05-compatible CPU supports only 2 threads per core as this
is what POWER6 (2.05 compliant CPU) implements, the same is for
POWER7 (2.06, 4 threads) and POWER8 (2.07, 8 threads).
This calls spapr_fixup_cpu_smt_dt() with the maximum allowed number of
threads which affects ibm,ppc-interrupt-server#s and
ibm,ppc-interrupt-gserver#s properties.
The number of CPU nodesremains unchanged.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
This adds basic support for the "compat" CPU option. By specifying
the compat property, the user can manually switch guest CPU mode from
"raw" to "architected".
This defines feature disable bits which are not used yet as, for example,
PowerISA 2.07 says if 2.06 mode is selected, the TM bit does not matter -
transactional memory (TM) will be disabled because 2.06 does not define
it at all. The same is true for VSX and 2.05 mode. So just setting a mode
must be ok.
This does not change the existing behavior as the actual compatibility
mode support is coming in next patches.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[agraf: fix compilation on 32bit hosts]
Signed-off-by: Alexander Graf <agraf@suse.de>
There are 2 L1 cache control registers - one for data (L1CSR0) and
one for instructions (L1CSR1).
Emulate both of them well enough to give the guest the illusion that
it could actually do anything about its caches.
Signed-off-by: Alexander Graf <agraf@suse.de>
In addition to the L1 data cache configuration register L1CFG0 there is
also another one for the L1 instruction cache called L1CFG1.
Emulate that one with the same values as the data one.
Signed-off-by: Alexander Graf <agraf@suse.de>
On the x86, some devices need access to the CPU reset pin (INIT#).
Provide a generic service to do this, using one of the internal
cpu_interrupt targets. Generalize the PPC-specific code for
CPU_INTERRUPT_RESET to other targets.
Since PPC does not support migration across QEMU versions (its
machine types are not versioned yet), I picked the value that
is used on x86, CPU_INTERRUPT_TGT_INT_1. Consequently, TGT_INT_2
and TGT_INT_3 are shifted down by one while keeping their value.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There are 3 different variants of the decrementor for BookE and BookS.
The BookE variant sets TSR[DIS] to 1 when the DEC value becomes 1 or 0. TSR[DIS]
is then the indicator whether the decrementor interrupt line is asserted or not.
The old BookS variant treats DEC as an edge interrupt that gets triggered when
the DEC value's top bit turns 1 from 0.
The new BookS variant maintains the assertion bit inside DEC itself. Whenever
the DEC value becomes negative (top bit set) the DEC interrupt line is asserted.
So far we implemented mostly the old BookS variant. Let's do them all properly.
This fixes booting pseries ppc64 guest images in TCG mode for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
This flag will be used to decide whether to emulate some bits of
H_SET_MODE hypercall because some are POWER8-only.
While we are here, add 2.05 flag to POWER8 family too. POWER7/7+ already
have it.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This resets SPR values to defaults on CPU reset. This should help
with little-endian guests reboot issues.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Note that while such functions may exist both for *-user and softmmu,
only *-user uses the CPUState hook, while softmmu reuses the prototype
for calling it directly.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Default to false.
Tidy variable naming and inline cast uses while at it.
Tested-by: Jia Liu <proljc@gmail.com> (or32)
Signed-off-by: Andreas Färber <afaerber@suse.de>
Normally CPUState::cpu_index is used to pick the right CPU for various
operations. However default consecutive numbering does not always work
for POWERPC.
These indexes are reflected in /proc/device-tree/cpus/PowerPC,POWER7@XX
and used to call KVM VCPU's ioctls. In order to achieve this,
kvmppc_fixup_cpu() was introduced. Roughly speaking, it multiplies
cpu_index by the number of threads per core.
This approach has disadvantages such as:
1. NUMA configuration stays broken after the fixup;
2. CPU-targeted commands from the QEMU Monitor do not work properly as
CPU indexes have been fixed and there is no clear way for the user to
know what the new CPU indexes are.
This introduces a @cpu_dt_id field in the CPUPPCState struct which
is initialized from @cpu_index by default and can be fixed later
to meet the device tree requirements.
This adds an API to handle @cpu_dt_id.
This removes kvmppc_fixup_cpu() as it is not more needed, @cpu_dt_id
is calculated in ppc_cpu_realize().
This will be used later in machine code.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Mike Day <ncmike@ncultra.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Correctly update the htab_mask using the return value of
KVM_PPC_ALLOCATE_HTAB ioctl. Also we don't update sdr1
on GET_SREGS for HV. We check for external htab and if
found true, we don't need to update sdr1
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[ fixed pte group offset computation in ppc_hash64_htab_lookup() that
caused TCG to fail, Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch updates the ppc_avr_t data structure to include elements for
signed 64-bit integers and (conditionally) unsigned 128 bit integers.
These elements will be in instructions models later on in this patch series.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds a flag that will be used to tag the Altivec instructions
introduced in Power ISA Version 2.07.
The flag is added to Power8 model since P8 supports these instructions.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds the Load Quadword and Reserve (lqarx) instruction,
which is new in Power ISA 2.07.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds a flag to identify the load/store quadword instructions
that are introduced with Power ISA 2.07.
The flag is added to the Power8 model since P8 supports these
instructions.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds support for the Target Address Register (TAR) to the Power8
model.
Because supported SPRs are typically identified in an init_proc_*()
function and because the Power8 model is currently just using the
init_proc_POWER7() function, a new init_proc_POWER8() function
is added and plugged into the P8 model.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds a flag for the bctar instruction. This instruction
is being introduced via Power ISA 2.07.
Also, the flag is added to the Power8 machine model since the P8
processor supports this instruction.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds a flag for Floating Point Test instructions that were
introduced in Power ISA V2.06B.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
