History log of /openbmc/qemu/target/ppc/translate.c (Results 1 – 25 of 433)
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Revision tags: v9.2.0, v9.1.2, v9.1.1, v9.1.0
# 84fb165d 12-Aug-2024 Ilya Leoshkevich <iii@linux.ibm.com>

target/ppc: Make divd[u] handler method decodetree compatible

This is like commit 86e6202a57b1 ("target/ppc: Make divw[u] handler
method decodetree compatible."), but for gen_op_arith_divd().

Cc: q

target/ppc: Make divd[u] handler method decodetree compatible

This is like commit 86e6202a57b1 ("target/ppc: Make divw[u] handler
method decodetree compatible."), but for gen_op_arith_divd().

Cc: qemu-stable@nongnu.org
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
(cherry picked from commit 7b4820a3e1dfba2b81f2354e7c748fc04b275dba)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

show more ...


# 563d60e9 12-Aug-2024 Ilya Leoshkevich <iii@linux.ibm.com>

target/ppc: Set ctx->opcode for decode_insn32()

divdu (without a dot) sometimes updates cr0, even though it shouldn't.
The reason is that gen_op_arith_divd() checks Rc(ctx->opcode), which is
not ini

target/ppc: Set ctx->opcode for decode_insn32()

divdu (without a dot) sometimes updates cr0, even though it shouldn't.
The reason is that gen_op_arith_divd() checks Rc(ctx->opcode), which is
not initialized. This field is initialized only for instructions that
go through decode_legacy(), and not decodetree.

There already was a similar issue fixed in commit 86e6202a57b1
("target/ppc: Make divw[u] handler method decodetree compatible.").

It's not immediately clear what else may access the uninitialized
ctx->opcode, so instead of playing whack-a-mole and changing the check
to compute_rc0, simply initialize ctx->opcode.

Cc: qemu-stable@nongnu.org
Fixes: 99082815f17f ("target/ppc: Add infrastructure for prefixed insns")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
(cherry picked from commit c9b8a13a8841e0e23901e57e24ea98eeef16cf91)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

show more ...


# 6b829602 05-Nov-2024 Peter Maydell <peter.maydell@linaro.org>

Merge tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu into staging

* Various bug fixes
* Big cleanup of deprecated machines
* Power11 support for spapr
* XIVE improvements
* Goo

Merge tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu into staging

* Various bug fixes
* Big cleanup of deprecated machines
* Power11 support for spapr
* XIVE improvements
* Goodbye to Cedric and David as ppc reviewers, thank you both o7

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# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4E43 7DDA 5661 6F43 29B0 A795 67B3 0276 A862 1CAE

* tag 'pull-ppc-for-9.2-1-20241104' of https://gitlab.com/npiggin/qemu: (67 commits)
MAINTAINERS: Remove myself as reviewer
MAINTAINERS: Remove myself from XIVE
MAINTAINERS: Remove myself from the PowerNV machines
hw/ppc: Consolidate ppc440 initial mapping creation functions
hw/ppc: Consolidate e500 initial mapping creation functions
tests/qtest: Add XIVE tests for the powernv10 machine
pnv/xive2: TIMA CI ops using alternative offsets or byte lengths
pnv/xive2: TIMA support for 8-byte OS context push for PHYP
pnv/xive: Update PIPR when updating CPPR
pnv/xive: Add special handling for pool targets
ppc/xive2: Support "Pull Thread Context to Odd Thread Reporting Line"
ppc/xive2: Change context/ring specific functions to be generic
ppc/xive2: Support "Pull Thread Context to Register" operation
ppc/xive2: Allow 1-byte write of Target field in TIMA
ppc/xive2: Dump the VP-group and crowd tables with 'info pic'
ppc/xive2: Dump more NVP state with 'info pic'
pnv/xive2: Support for "OS LGS Push" TIMA operation
ppc/xive2: Support TIMA "Pull OS Context to Odd Thread Reporting Line"
pnv/xive2: Define OGEN field in the TIMA
pnv/xive: TIMA patch sets pre-req alignment and formatting changes
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...


# 7b4820a3 12-Aug-2024 Ilya Leoshkevich <iii@linux.ibm.com>

target/ppc: Make divd[u] handler method decodetree compatible

This is like commit 86e6202a57b1 ("target/ppc: Make divw[u] handler
method decodetree compatible."), but for gen_op_arith_divd().

Cc: q

target/ppc: Make divd[u] handler method decodetree compatible

This is like commit 86e6202a57b1 ("target/ppc: Make divw[u] handler
method decodetree compatible."), but for gen_op_arith_divd().

Cc: qemu-stable@nongnu.org
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# c9b8a13a 12-Aug-2024 Ilya Leoshkevich <iii@linux.ibm.com>

target/ppc: Set ctx->opcode for decode_insn32()

divdu (without a dot) sometimes updates cr0, even though it shouldn't.
The reason is that gen_op_arith_divd() checks Rc(ctx->opcode), which is
not ini

target/ppc: Set ctx->opcode for decode_insn32()

divdu (without a dot) sometimes updates cr0, even though it shouldn't.
The reason is that gen_op_arith_divd() checks Rc(ctx->opcode), which is
not initialized. This field is initialized only for instructions that
go through decode_legacy(), and not decodetree.

There already was a similar issue fixed in commit 86e6202a57b1
("target/ppc: Make divw[u] handler method decodetree compatible.").

It's not immediately clear what else may access the uninitialized
ctx->opcode, so instead of playing whack-a-mole and changing the check
to compute_rc0, simply initialize ctx->opcode.

Cc: qemu-stable@nongnu.org
Fixes: 99082815f17f ("target/ppc: Add infrastructure for prefixed insns")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# 08ae519a 16-Oct-2024 Peter Maydell <peter.maydell@linaro.org>

Merge tag 'single-binary-20241015' of https://github.com/philmd/qemu into staging

Remove some target-specific endianness knowledge from target/.

For MIPS, propagate endianness at the board level, u

Merge tag 'single-binary-20241015' of https://github.com/philmd/qemu into staging

Remove some target-specific endianness knowledge from target/.

For MIPS, propagate endianness at the board level, using QOM property.

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* tag 'single-binary-20241015' of https://github.com/philmd/qemu: (33 commits)
hw/mips: Have mips_cpu_create_with_clock() take an endianness argument
hw/mips/cps: Set the vCPU 'cpu-big-endian' property
target/mips: Expose MIPSCPU::is_big_endian property
target/mips: Use tcg_constant_tl() instead of tcg_gen_movi_tl()
target/mips: Use gen_op_addr_addi() when possible
target/mips: Have gen_addiupc() expand $pc during translation
target/mips: Replace MO_TE by mo_endian()
target/mips: Introduce mo_endian() helper
target/mips: Remove unused MEMOP_IDX() macro
target/mips: Rename unused sysemu argument of OP_LD_ATOMIC()
target/mips: Explode MO_TExx -> MO_TE | MO_xx
target/mips: Factor mo_endian_rev() out of MXU code
target/mips: Convert mips16e decr_and_load/store() macros to functions
target/mips: Replace MO_TE by mo_endian_env() in get_pte()
target/mips: Introduce mo_endian_env() helper
target/mips: Rename cpu_is_bigendian() -> disas_is_bigendian()
target/mips: Declare mips_env_is_bigendian() in 'internal.h'
hw/xtensa/xtfpga: Remove TARGET_BIG_ENDIAN #ifdef'ry
target/ppc: Use tcg_constant_tl() instead of tcg_gen_movi_tl()
target/tricore: Use tcg_constant_tl() instead of tcg_gen_movi_tl()
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...


# cebf9b0d 04-Oct-2024 Philippe Mathieu-Daudé <philmd@linaro.org>

target/ppc: Use tcg_constant_tl() instead of tcg_gen_movi_tl()

Directly use tcg_constant_tl() for constant integer,
this save a call to tcg_gen_movi_tl() and a temp register.

Inspired-by: Richard H

target/ppc: Use tcg_constant_tl() instead of tcg_gen_movi_tl()

Directly use tcg_constant_tl() for constant integer,
this save a call to tcg_gen_movi_tl() and a temp register.

Inspired-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241004202621.4321-4-philmd@linaro.org>

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# 93b799fa 26-Jul-2024 Richard Henderson <richard.henderson@linaro.org>

Merge tag 'pull-ppc-for-9.1-2-20240726-1' of https://gitlab.com/npiggin/qemu into staging

fixes

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Merge tag 'pull-ppc-for-9.1-2-20240726-1' of https://gitlab.com/npiggin/qemu into staging

fixes

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# Primary key fingerprint: 4E43 7DDA 5661 6F43 29B0 A795 67B3 0276 A862 1CAE

* tag 'pull-ppc-for-9.1-2-20240726-1' of https://gitlab.com/npiggin/qemu: (96 commits)
target/ppc: Remove includes from mmu-book3s-v3.h
target/ppc/mmu-radix64: Remove externally unused parts from header
target/ppc: Unexport some functions from mmu-book3s-v3.h
target/ppc/mmu-hash32.c: Move get_pteg_offset32() to the header
target/ppc/mmu-hash32.c: Inline and remove ppc_hash32_pte_raddr()
target/ppc/mmu_common.c: Remove mmu_ctx_t
target/ppc/mmu_common.c: Stop using ctx in get_bat_6xx_tlb()
target/ppc: Remove bat_size_prot()
target/ppc/mmu_common.c: Use defines instead of numeric constants
target/ppc/mmu_common.c: Rename function parameter
target/ppc/mmu_common.c: Stop using ctx in ppc6xx_tlb_check()
target/ppc/mmu_common.c: Remove key field from mmu_ctx_t
target/ppc/mmu_common.c: Init variable in function that relies on it
target/ppc/mmu-hash32.c: Inline and remove ppc_hash32_pte_prot()
target/ppc: Add function to get protection key for hash32 MMU
target/ppc/mmu_common.c: Remove ptem field from mmu_ctx_t
target/ppc/mmu_common.c: Inline and remove ppc6xx_tlb_pte_check()
target/ppc/mmu_common.c: Simplify a switch statement
target/ppc/mmu_common.c: Remove single use local variable
target/ppc/mmu_common.c: Convert local variable to bool
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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# bf15bf0a 09-Jul-2024 Chinmay Rath <rathc@linux.ibm.com>

target/ppc: Move get/set_avr64 functions to vmx-impl.c.inc.

Those functions are used to ld/st data to and from Altivec registers,
in 64 bits chunks, and are only used in vmx-impl.c.inc file,
hence t

target/ppc: Move get/set_avr64 functions to vmx-impl.c.inc.

Those functions are used to ld/st data to and from Altivec registers,
in 64 bits chunks, and are only used in vmx-impl.c.inc file,
hence the clean-up movement.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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# 29df8d95 18-Jun-2024 Chinmay Rath <rathc@linux.ibm.com>

target/ppc: Move VSX vector with length storage access insns to decodetree.

Moving the following instructions to decodetree specification :

{l, st}xvl(l) : X-form

The changes wer

target/ppc: Move VSX vector with length storage access insns to decodetree.

Moving the following instructions to decodetree specification :

{l, st}xvl(l) : X-form

The changes were verified by validating that the tcg-ops generated by those
instructions remain the same, which were captured using the '-d in_asm,op' flag.

Also added a new function do_ea_calc_ra to calculate the effective address :
EA <- (RA == 0) ? 0 : GPR[RA], which is now used by the above-said insns,
and shall be used later by (p){lx, stx}vp insns.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
[np: Fix 32-bit build]
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# 71bce0e1 23-Jul-2024 Richard Henderson <richard.henderson@linaro.org>

Merge tag 'pull-tcg-20240723' of https://gitlab.com/rth7680/qemu into staging

accel/tcg: Export set/clear_helper_retaddr
target/arm: Use set_helper_retaddr for dc_zva, sve and sme
target/ppc: Tidy d

Merge tag 'pull-tcg-20240723' of https://gitlab.com/rth7680/qemu into staging

accel/tcg: Export set/clear_helper_retaddr
target/arm: Use set_helper_retaddr for dc_zva, sve and sme
target/ppc: Tidy dcbz helpers
target/ppc: Use set_helper_retaddr for dcbz
target/s390x: Use set_helper_retaddr in mem_helper.c

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* tag 'pull-tcg-20240723' of https://gitlab.com/rth7680/qemu:
target/riscv: Simplify probing in vext_ldff
target/s390x: Use set/clear_helper_retaddr in mem_helper.c
target/s390x: Use user_or_likely in access_memmove
target/s390x: Use user_or_likely in do_access_memset
target/ppc: Improve helper_dcbz for user-only
target/ppc: Merge helper_{dcbz,dcbzep}
target/ppc: Split out helper_dbczl for 970
target/ppc: Hoist dcbz_size out of dcbz_common
target/ppc/mem_helper.c: Remove a conditional from dcbz_common()
target/arm: Use set/clear_helper_retaddr in SVE and SME helpers
target/arm: Use set/clear_helper_retaddr in helper-a64.c
accel/tcg: Move {set,clear}_helper_retaddr to cpu_ldst.h

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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# c6d84fd7 01-Jul-2024 Richard Henderson <richard.henderson@linaro.org>

target/ppc: Merge helper_{dcbz,dcbzep}

Merge the two and pass the mmu_idx directly from translation.
Swap the argument order in dcbz_common to avoid extra swaps.

Reviewed-by: Nicholas Piggin <npigg

target/ppc: Merge helper_{dcbz,dcbzep}

Merge the two and pass the mmu_idx directly from translation.
Swap the argument order in dcbz_common to avoid extra swaps.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...


# 62fe57c6 01-Jul-2024 Richard Henderson <richard.henderson@linaro.org>

target/ppc: Split out helper_dbczl for 970

We can determine at translation time whether the insn is or
is not dbczl. We must retain a runtime check against the
HID5 register, but we can move that t

target/ppc: Split out helper_dbczl for 970

We can determine at translation time whether the insn is or
is not dbczl. We must retain a runtime check against the
HID5 register, but we can move that to a separate function
that never affects other ppc models.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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# ffdd099a 24-May-2024 Richard Henderson <richard.henderson@linaro.org>

Merge tag 'pull-ppc-for-9.1-1-20240524-1' of https://gitlab.com/npiggin/qemu into staging

*** NOTE ***
This replaces the previous PR for tags/pull-ppc-for-9.1-1-20240524

* Fix an interesting TLB in

Merge tag 'pull-ppc-for-9.1-1-20240524-1' of https://gitlab.com/npiggin/qemu into staging

*** NOTE ***
This replaces the previous PR for tags/pull-ppc-for-9.1-1-20240524

* Fix an interesting TLB invalidate race
* Implement more instructions with decodetree
* Add the POWER8/9/10 BHRB facility
* Add missing instructions, registers, SMT support
* First round of a big MMU xlate cleanup

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* tag 'pull-ppc-for-9.1-1-20240524-1' of https://gitlab.com/npiggin/qemu: (72 commits)
target/ppc: Remove pp_check() and reuse ppc_hash32_pp_prot()
target/ppc: Move out BookE and related MMU functions from mmu_common.c
target/ppc: Add a function to check for page protection bit
target/ppc/mmu-radix64.c: Drop a local variable
target/ppc/mmu-hash32.c: Drop a local variable
target/ppc: Split off common embedded TLB init
target/ppc: Remove id_tlbs flag from CPU env
target/ppc: Move mmu_ctx_t type to mmu_common.c
target/ppc: Transform ppc_jumbo_xlate() into ppc_6xx_xlate()
target/ppc: Split off 40x cases from ppc_jumbo_xlate()
target/ppc: Split off real mode handling from get_physical_address_wtlb()
target/ppc: Simplify ppc_booke_xlate() part 2
target/ppc: Simplify ppc_booke_xlate() part 1
target/ppc: Split off BookE handling from ppc_jumbo_xlate()
target/ppc: Remove BookE from direct store handling
target/ppc: Don't use mmu_ctx_t in mmubooke206_get_physical_address()
target/ppc: Don't use mmu_ctx_t in mmubooke_get_physical_address()
target/ppc: Don't use mmu_ctx_t for mmu40x_get_physical_address()
target/ppc: Replace hard coded constants in ppc_jumbo_xlate()
target/ppc: Deindent ppc_jumbo_xlate()
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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# 2736432f 18-Jun-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: Implement SPRC/SPRD SPRs

This implements the POWER SPRC/SPRD SPRs, and SCRATCH0-7 registers that
can be accessed via these indirect SPRs.

SCRATCH registers only provide storage, but the

target/ppc: Implement SPRC/SPRD SPRs

This implements the POWER SPRC/SPRD SPRs, and SCRATCH0-7 registers that
can be accessed via these indirect SPRs.

SCRATCH registers only provide storage, but they are used by firmware
for low level crash and progress data, so this implementation logs
writes to the registers to help with analysis.

Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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# 4d2b0ad3 12-Jul-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: Add SMT support to PTCR SPR

PTCR is a per-core register.

Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>


# 5fa7efe4 26-May-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: add helper to write per-LPAR SPRs

An SPR can be either per-thread, per-core, or per-LPAR. Per-LPAR means
per-thread or per-core, depending on 1LPAR mode.

Reviewed-by: Glenn Miles <miles

target/ppc: add helper to write per-LPAR SPRs

An SPR can be either per-thread, per-core, or per-LPAR. Per-LPAR means
per-thread or per-core, depending on 1LPAR mode.

Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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# 1cbcbcb8 10-Sep-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: Add PPR32 SPR

PPR32 provides access to the upper half of PPR.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>


# c10c6ce0 04-Jun-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: Remove redundant MEMOP_GET_SIZE macro

There is a memop_size() function for this.

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Richard Henderson <richard.henderson@linar

target/ppc: Remove redundant MEMOP_GET_SIZE macro

There is a memop_size() function for this.

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# 21cfc36a 04-Jun-2023 Nicholas Piggin <npiggin@gmail.com>

target/ppc: larx/stcx generation need only apply DEF_MEMOP() once

Use DEF_MEMOP() consistently in larx and stcx. generation, and apply it
once when it's used rather than where the macros are expande

target/ppc: larx/stcx generation need only apply DEF_MEMOP() once

Use DEF_MEMOP() consistently in larx and stcx. generation, and apply it
once when it's used rather than where the macros are expanded, to reduce
typing.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# 6bfcf1dc 28-Mar-2024 Glenn Miles <milesg@linux.vnet.ibm.com>

target/ppc: Add clrbhrb and mfbhrbe instructions

Add support for the clrbhrb and mfbhrbe instructions.

Since neither instruction is believed to be critical to
performance, both instructions were im

target/ppc: Add clrbhrb and mfbhrbe instructions

Add support for the clrbhrb and mfbhrbe instructions.

Since neither instruction is believed to be critical to
performance, both instructions were implemented using helper
functions.

Access to both instructions is controlled by bits in the
HFSCR (for privileged state) and MMCR0 (for problem state).
A new function, helper_mmcr0_facility_check, was added for
checking MMCR0[BHRBA] and raising a facility_unavailable exception
if required.

NOTE: For P8 and P9, due to a performance issue, branch history will
not be kept, but the instructions will be allowed to execute
as normal with the exception that the mfbhrbe instruction will
always return a zero value.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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# 4de4a470 28-Mar-2024 Glenn Miles <milesg@linux.vnet.ibm.com>

target/ppc: Add recording of taken branches to BHRB

This commit continues adding support for the Branch History
Rolling Buffer (BHRB) as is provided starting with the P8
processor and continuing wit

target/ppc: Add recording of taken branches to BHRB

This commit continues adding support for the Branch History
Rolling Buffer (BHRB) as is provided starting with the P8
processor and continuing with its successors. This commit
is limited to the recording and filtering of taken branches.

The following changes were made:

- Enabled functionality on P10 processors only due to
performance impact seen with P8 and P9 where it is not
disabled for non problem state branches.
- Added a BHRB buffer for storing branch instruction and
target addresses for taken branches
- Renamed gen_update_cfar to gen_update_branch_history and
added a 'target' parameter to hold the branch target
address and 'inst_type' parameter to use for filtering
- Added TCG code to gen_update_branch_history that stores
data to the BHRB and updates the BHRB offset.
- Added BHRB resource initialization and reset functions

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# a7138e28 28-Mar-2024 Glenn Miles <milesg@linux.vnet.ibm.com>

target/ppc: Add new hflags to support BHRB

This commit is preparatory to the addition of Branch History
Rolling Buffer (BHRB) functionality, which is being provided
today starting with the P8 proces

target/ppc: Add new hflags to support BHRB

This commit is preparatory to the addition of Branch History
Rolling Buffer (BHRB) functionality, which is being provided
today starting with the P8 processor.

BHRB uses several SPR register fields to control whether or not
a branch instruction's address (and sometimes target address)
should be recorded. Checking each of these fields with each
branch instruction using jitted code would lead to a significant
decrease in performance.

Therefore, it was decided that BHRB configuration bits that are
not expected to change frequently should have their state summarized
in an hflag so that the amount of checking done by jitted code can
be reduced.

This commit contains the changes for summarizing the state of the
following register fields in the HFLAGS_BHRB_ENABLE hflag:

MMCR0[FCP] - Determines if BHRB recording is frozen in the
problem state

MMCR0[FCPC] - A modifier for MMCR0[FCP]

MMCRA[BHRBRD] - Disables all BHRB recording for a thread

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

show more ...


# 21b5f546 29-Apr-2024 Chinmay Rath <rathc@linux.ibm.com>

target/ppc: Move VMX storage access instructions to decodetree

Moving the following instructions to decodetree specification :

{l,st}ve{b,h,w}x,
{l,st}v{x,xl},
lvs{l,r} : X-form

The changes we

target/ppc: Move VMX storage access instructions to decodetree

Moving the following instructions to decodetree specification :

{l,st}ve{b,h,w}x,
{l,st}v{x,xl},
lvs{l,r} : X-form

The changes were verified by validating that the tcg ops generated by those
instructions remain the same, which were captured using the '-d in_asm,op' flag.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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# 948e257c 23-Apr-2024 Chinmay Rath <rathc@linux.ibm.com>

target/ppc: Move logical fixed-point instructions to decodetree.

Moving the below instructions to decodetree specification :

andi[s]., {ori, xori}[s] : D-form

{and, andc, nand, or, orc, nor, x

target/ppc: Move logical fixed-point instructions to decodetree.

Moving the below instructions to decodetree specification :

andi[s]., {ori, xori}[s] : D-form

{and, andc, nand, or, orc, nor, xor, eqv}[.],
exts{b, h, w}[.], cnt{l, t}z{w, d}[.],
popcnt{b, w, d}, prty{w, d}, cmp, bpermd : X-form

With this patch, all the fixed-point logical instructions have been
moved to decodetree.
The changes were verified by validating that the tcg ops generated by those
instructions remain the same, which were captured with the '-d in_asm,op' flag.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
[np: 32-bit compile fix]
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

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