Commit Graph

82 Commits

Author SHA1 Message Date
Daniel Henrique Barboza
cb76bbc43f target/ppc: add PPC_INTERRUPT_EBB and EBB exceptions
PPC_INTERRUPT_EBB is a new interrupt that will be used to deliver EBB
exceptions that had to be postponed because the thread wasn't in problem
state at the time the event-based branch was supposed to occur.

ISA 3.1 also defines two EBB exceptions: Performance Monitor EBB
exception and External EBB exception. They are being added as
POWERPC_EXCP_PERFM_EBB and POWERPC_EXCP_EXTERNAL_EBB.

PPC_INTERRUPT_EBB will check BESCR bits to see the EBB type that
occurred and trigger the appropriate exception. Both exceptions are
doing the same thing in this first implementation: clear BESCR_GE and
enter the branch with env->nip retrieved from SPR_EBBHR.

The checks being done by the interrupt code are msr_pr and BESCR_GE
states. All other checks (EBB facility check, BESCR_PME bit, specific
bits related to the event type) must be done beforehand.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220225101140.1054160-4-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-03-02 06:51:36 +01:00
Daniel Henrique Barboza
33edcde7c8 target/ppc: make power8-pmu.c CONFIG_TCG only
This is an exclusive TCG helper. Gating it with CONFIG_TCG and changing
meson.build accordingly will prevent problems --disable-tcg and
--disable-linux-user later on.

We're also changing the uses of !kvm_enabled() to tcg_enabled() to avoid
adding "defined(CONFIG_TCG)" ifdefs, since tcg_enabled() will be
defaulted to false with --disable-tcg and the block will always be
skipped.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220225101140.1054160-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-03-02 06:51:36 +01:00
Fabiano Rosas
65e0446c86 target/ppc: Move common SPR functions out of cpu_init
Let's leave cpu_init with just generic CPU initialization and
QOM-related functions.

The rest of the SPR registration functions will be moved in the
following patches along with the code that uses them. These are only
the commonly used ones.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-28-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
b58fd0c39b target/ppc: cpu_init: Move check_pow and QOM macros to a header
These will need to be accessed from other files once we move the CPUs
code to separate files.

The check_pow_hid0 and check_pow_hid0_74xx are too specific to be
moved to a header so I'll deal with them later when splitting this
code between the multiple CPU families.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-27-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
565873b380 target/ppc: cpu_init: Move SPR registration macros to a header
Put the SPR registration macros in a header that is accessible outside
of cpu_init.c. The following patches will move CPU-specific code to
separate files and will need to access it.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-26-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
917ea4381a target/ppc: cpu_init: Expose some SPR registration helpers
The following patches will move CPU-specific code into separate files,
so expose the most used SPR registration functions:

register_sdr1_sprs         | 22 callers
register_low_BATs          | 20 callers
register_non_embedded_sprs | 19 callers
register_high_BATs         | 10 callers
register_thrm_sprs         | 8 callers
register_usprgh_sprs       | 6 callers
register_6xx_7xx_soft_tlb  | only 3 callers, but it helps to
                             keep the soft TLB code consistent.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-25-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
99e964ef95 target/ppc: Rename spr_tcg.h to spr_common.h
Initial intent for the spr_tcg header was to expose the spr_read|write
callbacks that are only used by TCG code. However, although these
routines are TCG-specific, the KVM code needs access to env->sprs
which creation is currently coupled to the callback registration.

We are probably not going to decouple SPR creation and TCG callback
registration any time soon, so let's rename the header to spr_common
to accomodate the register_*_sprs functions that will be moved out of
cpu_init.c in the following patches.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-24-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
2a48d83dfd target/ppc: cpu_init: Remove register_usprg3_sprs
This function registers just one SPR and has only two callers, so open
code it.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-23-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
217781afde target/ppc: cpu_init: Rename register_ne_601_sprs
The important part of this function is that it applies to non-embedded
CPUs, not that it also applies to the 601. We removed support for the
601 anyway, so rename this function.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-22-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
c1f2157728 target/ppc: cpu_init: Reuse init_proc_745 for the 755
The init_proc_755 function is identical to the 745 one except for the
755-specific registers. I think it is worth it to make them share
code.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-21-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
0df0ca16b4 target/ppc: cpu_init: Reuse init_proc_604 for the 604e
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-20-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
9f33f3d876 target/ppc: cpu_init: Reuse init_proc_603 for the e300
init_proc_603 is defined after init_proc_e300, so I had to move some
code around to make it work.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-19-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
3b18ec7687 target/ppc: cpu_init: Move 604e SPR registration into a function
This is done to improve init_proc readability and to make subsequent
patches that touch this code a bit cleaner.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-18-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
a3a2767488 target/ppc: cpu_init: Move e300 SPR registration into a function
This is done to improve init_proc readability and to make subsequent
patches that touch this code a bit cleaner.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-17-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
28930245a8 target/ppc: cpu_init: Move 755 L2 cache SPRs into a function
This is just to have 755-specific registers contained into a function,
intead of leaving them open-coded in init_proc_755. It makes init_proc
easier to read and keeps later patches that touch this code a bit
cleaner.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-16-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
0301b39c78 target/ppc: cpu_init: Deduplicate 7xx SPR registration
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-15-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
a5d1120b1d target/ppc: cpu_init: Deduplicate 745/755 SPR registration
The 745 and 755 can share the HID registration, so move it all into
register_755_sprs, which applies for both CPUs.

Also rename that function to register_745_sprs, since the 745 is the
earliest of the two. This will help with separating 755-specific
registers in a subsequent patch.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-14-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
20f6fb99b2 target/ppc: cpu_init: Deduplicate 604 SPR registration
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-13-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
d2b29d0ade target/ppc: cpu_init: Deduplicate 603 SPR registration
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-12-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
49ed82b29a target/ppc: cpu_init: Deduplicate 440 SPR registration
Move some of the 440 registers that are being repeated in the 440*
CPUs to register_440_sprs.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-11-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:15 +01:00
Fabiano Rosas
674f45096f target/ppc: cpu_init: Decouple 74xx SPR registration from 7xx
We're considering these two to be from different CPU families, so
duplicate some code to keep them separate.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-10-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
1a71c5d158 target/ppc: cpu_init: Decouple G2 SPR registration from 755
We're considering these two to be in different CPU families (6xx and
7xx), so keep their SPR registration separate.

The code was copied into register_G2_sprs and the common function was
renamed to apply only to the 755.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-9-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
e599bcedf9 target/ppc: cpu_init: Move G2 SPRs into register_G2_sprs
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-8-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
acd1f78870 target/ppc: cpu_init: Move 405 SPRs into register_405_sprs
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-7-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
4ffb8c5e43 target/ppc: cpu_init: Avoid nested SPR register functions
Make sure that every register_*_sprs function only has calls to
spr_register* to register individual SPRs. Do not allow nesting. This
makes the code easier to follow and a look at init_proc_* should
suffice to know what SPRs a CPU has.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-6-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
024b40e0ae target/ppc: cpu_init: Move Timebase registration into the common function
Now that the 601 was removed, all of our CPUs have a timebase, so that
can be moved into the common function.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-5-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
e78280a237 target/ppc: cpu_init: Group registration of generic SPRs
The top level init_proc calls register_generic_sprs but also registers
some other SPRs outside of that function. Let's group everything into
a single place.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-4-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
363bd7d0d5 target/ppc: cpu_init: Remove G2LE init code
The G2LE CPU initialization code is the same as the G2. Use the latter
for both.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-3-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
acf629eb7a target/ppc: cpu_init: Remove not implemented comments
The /* XXX : not implemented */ comments all over cpu_init are
confusing and ambiguous.

Do they mean not implemented by QEMU, not implemented in a specific
access mode? Not implemented by the CPU? Do they apply to just the
register right after or to a whole block? Do they mean we have an
action to take in the future to implement these?  Are they only
informative?

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
Fabiano Rosas
fd7dc4bb78 target/ppc: Merge 7x5 and 7x0 exception model IDs
Since we've split the exception code by exception model, the exception
model IDs are becoming less useful. These two can be merged.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220204173430.1457358-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-09 09:08:56 +01:00
Fabiano Rosas
9323650f97 target/ppc: Merge exception model IDs for 6xx CPUs
We don't need three separate exception model IDs for the 603, 604 and
G2.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220203200957.1434641-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-09 09:08:55 +01:00
Cédric Le Goater
005b69fdcc target/ppc: Remove PowerPC 601 CPUs
The PowerPC 601 processor is the first generation of processors to
implement the PowerPC architecture. It was designed as a bridge
processor and also could execute most of the instructions of the
previous POWER architecture. It was found on the first Macs and IBM
RS/6000 workstations.

There is not much interest in keeping the CPU model of this
POWER-PowerPC bridge processor. We have the 603 and 604 CPU models of
the 60x family which implement the complete PowerPC instruction set.

Cc: "Hervé Poussineau" <hpoussin@reactos.org>
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220203142756.1302515-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-09 09:08:55 +01:00
Fabiano Rosas
84f54da513 target/ppc: Remove 440x4 CPU
This CPU was partially removed due to lack of support in 2017 by commit
aef7796057 ("ppc: remove non implemented cpu models").

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220128221611.1221715-1-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-09 09:08:55 +01:00
Cédric Le Goater
4537d62dce target/ppc: Remove support for the PowerPC 602 CPU
The 602 was derived from the PowerPC 603, for the gaming market it
seems. It was hardly used and no firmware supporting the CPU could be
found. Drop support.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-28 21:38:17 +01:00
Fabiano Rosas
301e5d48b1 target/ppc: 405: Add missing MSR_ME bit
The 405 MSR has the Machine Check Enable bit. We're making use of it
when dispatching Machine Check, so add the bit to the msr_mask.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220118184448.852996-3-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-28 13:15:03 +01:00
Fabiano Rosas
645d843ca5 target/ppc: 405: Rename MSR_POW to MSR_WE
Bit 13 is the Wait State Enable bit. Give it its proper name.

As far as I can see we don't do anything with MSR_POW for the 405, so
this change has no effect.

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220118184448.852996-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-28 13:15:03 +01:00
Cédric Le Goater
91137619c6 target/ppc: Add extra float instructions to POWER5P processors
ISA v2.03 introduced Floating Round to Integer instructions : frin,
friz, frip, and frim. Add them to POWER5+.

The PPC_FLOAT_EXT flag also includes the fre (Floating Reciprocal
Estimate) instruction which was introduced in ISA v2.0x. The
architecture document says its optional and that might be the reason
why it has been kept under the PPC_FLOAT_EXT flag. This means 970 CPUs
can not use it under QEMU, which doesn't seem to be a problem.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-12 11:28:26 +01:00
Cédric Le Goater
23ab6d8813 target/ppc: Add popcntb instruction to POWER5+ processors
popcntb instruction was added in ISA v2.02. Add support for POWER5+
processors since they implement ISA v2.03.

PPC970 CPUs implement v2.01 and do not support popcntb.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220105095142.3990430-2-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-12 11:28:26 +01:00
Richard Henderson
6e8b990354 target/ppc: Cache per-pmc insn and cycle count settings
This is the combination of frozen bit and counter type, on a per
counter basis. So far this is only used by HFLAGS_INSN_CNT, but
will be used more later.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[danielhb: fixed PMC4 cyc_cnt shift, insn run latch code,
           MMCR0_FC handling, "PMC[1-6]" comment]
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220103224746.167831-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-04 07:55:34 +01:00
Cédric Le Goater
fbe08667c5 ppc/ppc405: Dump specific registers
Rework slightly ppc_cpu_dump_state() to replace the various 'if'
statements with a 'switch'.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211222064025.1541490-9-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220103063441.3424853-10-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-04 07:55:34 +01:00
Cédric Le Goater
dd69d140ce ppc/ppc405: Introduce a store helper for SPR_40x_PID
The PID SPR of the 405 CPU contains the translation ID of the TLB
which is a 8-bit field. Enforce the mask with a store helper.

Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211222064025.1541490-8-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220103063441.3424853-9-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-04 07:55:34 +01:00
Cédric Le Goater
cbd8f17d16 ppc/ppc405: Restore TCR and STR write handlers
The 405 timers were broken when booke support was added. Assumption
was made that the register numbers were the same but it's not :

    SPR_BOOKE_TSR         (0x150)
    SPR_BOOKE_TCR         (0x154)
    SPR_40x_TSR           (0x3D8)
    SPR_40x_TCR           (0x3DA)

Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Fixes: ddd1055b07 ("PPC: booke timers")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211222064025.1541490-5-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220103063441.3424853-6-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-01-04 07:55:34 +01:00
Daniel Henrique Barboza
7aeac354a6 target/ppc/power8-pmu.c: add PM_RUN_INST_CMPL (0xFA) event
PM_RUN_INST_CMPL, instructions completed with the run latch set, is
the architected PowerISA v3.1 event defined with PMC4SEL = 0xFA.

Implement it by checking for the CTRL RUN bit before incrementing the
counter. To make this work properly we also need to force a new
translation block each time SPR_CTRL is written. A small tweak in
pmu_increment_insns() is then needed to only increment this event
if the thread has the run latch.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211201151734.654994-8-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Daniel Henrique Barboza
a6f91249e0 target/ppc: PMU: update counters on MMCR1 write
MMCR1 determines the events to be sampled by the PMU. Updating the
counters at every MMCR1 write ensures that we're not sampling more
or less events by looking only at MMCR0 and the PMCs.

It is worth noticing that both the Book3S PowerPC PMU, and this IBM
Power8+ PMU that we're modeling, also uses MMCRA, MMCR2 and MMCR3 to
control the PMU. These three registers aren't being handled in this
initial implementation, so for now we're controlling all the PMU
aspects using MMCR0, MMCR1 and the PMCs.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211201151734.654994-5-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Daniel Henrique Barboza
308b9fad2a target/ppc: PMU: update counters on PMCs r/w
Calling pmu_update_cycles() on every PMC read/write operation ensures
that the values being fetched are up to date with the current PMU state.

In theory we can get away by just trapping PMCs reads, but we're going
to trap PMC writes to deal with counter overflow logic later on.  Let's
put the required wiring for that and make our lives a bit easier in the
next patches.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211201151734.654994-4-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Daniel Henrique Barboza
c2eff582a3 target/ppc: PMU basic cycle count for pseries TCG
This patch adds the barebones of the PMU logic by enabling cycle
counting. The overall logic goes as follows:

- MMCR0 reg initial value is set to 0x80000000 (MMCR0_FC set) to avoid
having to spin the PMU right at system init;

- to retrieve the events that are being profiled, pmc_get_event() will
check the current MMCR0 and MMCR1 value and return the appropriate
PMUEventType. For PMCs 1-4, event 0x2 is the implementation dependent
value of PMU_EVENT_INSTRUCTIONS and event 0x1E is the implementation
dependent value of PMU_EVENT_CYCLES. These events are supported by IBM
Power chips since Power8, at least, and the Linux Perf driver makes use
of these events until kernel v5.15. For PMC1, event 0xF0 is the
architected PowerISA event for cycles. Event 0xFE is the architected
PowerISA event for instructions;

- if the counter is frozen, either via the global MMCR0_FC bit or its
individual frozen counter bits, PMU_EVENT_INACTIVE is returned;

- pmu_update_cycles() will go through each counter and update the
values of all PMCs that are counting cycles. This function will be
called every time a MMCR0 update is done to keep counters values
up to date. Upcoming patches will use this function to allow the
counters to be properly updated during read/write of the PMCs
and MMCR1 writes.

Given that the base CPU frequency is fixed at 1Ghz for both powernv and
pseries clock, cycle calculation assumes that 1 nanosecond equals 1 CPU
cycle. Cycle value is then calculated by adding the elapsed time, in
nanoseconds, of the last cycle update done via pmu_update_cycles().

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211201151734.654994-3-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Daniel Henrique Barboza
8f2e9d4003 target/ppc: introduce PMUEventType and PMU overflow timers
This patch starts an IBM Power8+ compatible PMU implementation by adding
the representation of PMU events that we are going to sample,
PMUEventType. This enum represents a Perf event that is being sampled by
a specific counter 'sprn'. Events that aren't available (i.e. no event
was set in MMCR1) will be of type 'PMU_EVENT_INVALID'. Events that are
inactive due to frozen counter bits state are of type
'PMU_EVENT_INACTIVE'. Other types added in this patch are
PMU_EVENT_CYCLES and PMU_EVENT_INSTRUCTIONS.  More types will be added
later on.

Let's also add the required PMU cycle overflow timers. They will be used
to trigger cycle overflows when cycle events are being sampled. This
timer will call cpu_ppc_pmu_timer_cb(), which in turn calls
fire_PMC_interrupt().  Both functions are stubs that will be implemented
later on when EBB support is added.

Two new helper files are created to host this new logic.
cpu_ppc_pmu_init() will init all overflow timers during CPU init time.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211201151734.654994-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Fabiano Rosas
7fc1dc8313 target/ppc: Fix e6500 boot
When Altivec support was added to the e6500 kernel in 2012[1], the
QEMU code was not changed, so we don't register the VPU/VPUA
exceptions for the e6500:

  qemu: fatal: Raised an exception without defined vector 73

Note that the error message says 73, instead of 32, which is the IVOR
for VPU. This is because QEMU knows only knows about the VPU interrupt
for the 7400s. In theory, we should not be raising _that_ VPU
interrupt, but instead another one specific for the e6500.

We unfortunately cannot register e6500-specific VPU/VPUA interrupts
because the SPEU/EFPDI interrupts also use IVOR32/33. These are
present only in the e500v1/2 versions. From the user manual:

e500v1, e500v2: only SPEU/EFPDI/EFPRI
e500mc, e5500:  no SPEU/EFPDI/EFPRI/VPU/VPUA
e6500:          only VPU/VPUA

So I'm leaving IVOR32/33 as SPEU/EFPDI, but altering the dispatch code
to convert the VPU #73 to a #32 when we're in the e6500. Since the
handling for SPEU and VPU is the same this is the only change that's
needed. The EFPDI is not implemented and will cause an abort. I don't
think it worth it changing the error message to take VPUA into
consideration, so I'm not changing anything there.

This bug was discussed in the thread:
https://lists.gnu.org/archive/html/qemu-ppc/2021-06/msg00222.html

1- https://git.kernel.org/torvalds/c/cd66cc2ee52

Reported-by: <mario@locati.it>
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211213133542.2608540-1-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:18 +01:00
Cédric Le Goater
c8f49e6b93 target/ppc: remove 401/403 CPUs
They have been there since 2007 without any board using them, most
were protected by a TODO define. Drop support.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20211202191108.1291515-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:16 +01:00
Fabiano Rosas
84835acbbf target/ppc: Set 601v exception model id
The exception model id for 601v has been removed without mention
why. I assume it was inadvertent and restore it here.

Fixes: b632a148b6 ("target-ppc: Use QOM method dispatch for MMU fault handling")
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211208123029.2052625-4-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:16 +01:00