| Message ID | 20240711141851.406677-1-npiggin@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | ppc/pnv: Better big-core model, lpar-per-core, PC unit | expand |
Hello Nick, On 7/11/24 16:18, Nicholas Piggin wrote: > Primary motivation for this series is to improve big-core support. > > This also fixes POWER8 SMT running Linux with the msgsnd fix and > setting lpar-per-core mode (which is always true on POWER8). It does. I gave a try to the powernv8 machine with : -smp 8,sockets=1,cores=1,threads=8 -smp 8,sockets=1,cores=2,threads=4 -smp 8,sockets=1,cores=4,threads=2 -smp 8,sockets=1,cores=8,threads=1 and -smp 16,sockets=1,cores=2,threads=8 -smp 16,sockets=1,cores=4,threads=4 -smp 16,sockets=2,cores=8,threads=1 So, Tested-by: Cédric Le Goater <clg@redhat.com> However there is an issue with smt on multisocket. CPU hang. I guess POWER8 is not a priority. It would be good to improve slightly the models with properties. slightly, because I don't think adding the "big-core" and "lpar-per-core" properties to the chip and the core are much work. I am (nearly) sure it will remove a few lines of code ! Anyhow, this is not a blocker and I hope we can merge these improvements for 9.1 [*] One thing we could do also is deprecate the POWER8NVL and POWER8E chips in the 9.1 cycle. Thanks, C. [*] the SPI model and ADU, LPC PSI serirq also. I haven't seen any updates for PHB and XIVE, > > I think I accounted for all feedback from Cedric and Harsh from the > last RFC (except a couple of style suggestions from Harsh). > > Since rfc: > - Fixed POWER8 SMT so it doesn't have to be disabled. > - Fixed inadvertent spapr SMT bug. > - Renamed PnvCPUState.core pointer to pnv_core. (Harsh) > - Moved where it is initialised (clg) > - Avoided most qdev_get_machine() calls by adding a PnvMachineState > pointer from PnvChip, new patch 3 (clg). > - Rename TB state to use camel case (Harsh and clg) > - Add comment to explain SPRC/SPRD is only accessed with powernv. > - Use mc->desc for error messages and avoid splitting machine init > handlers (Harsh). > - Add max_smt_threads class attribute to avoid duplicating checks (clg) > - Rename processor_id() class method to get_pir_tir (Harsh and clg) > - Add a comment for get_pir_tir() (clg) > - Allow get_pir_tir() to be passed NULL pointers to avoid dummy > pir/tir variables (Harsh) > - Move the PPC_CPU_HAS_CORE_SIBLINGS macros to inline functions (clg) > - Invert them (test for single-thread rather than for siblings) > because the callers read a little better that way (Harsh). > - Propagate lpar and big-core options down to chip and core > levels rather than having to test machine (clg) > - Significantly split the big-core patch (clg). > - Rework big-core device-tree handling to simplify it (clg). > - Make new has_smt_siblings property bool (Harsh) > - Make the big-core timebase tod quirk a machine class property > rather than machine state (Harsh). > > Thanks, > Nick > > Nicholas Piggin (18): > target/ppc: Fix msgsnd for POWER8 > ppc/pnv: Add pointer from PnvCPUState to PnvCore > ppc/pnv: Add a pointer from PnvChip to PnvMachineState > ppc/pnv: Move timebase state into PnvCore > target/ppc: Move SPR indirect registers into PnvCore > ppc/pnv: specialise init for powernv8/9/10 machines > ppc/pnv: Extend chip_pir class method to TIR as well > ppc: Add a core_index to CPUPPCState for SMT vCPUs > target/ppc: Add helpers to check for SMT sibling threads > ppc: Add has_smt_siblings property to CPUPPCState > ppc/pnv: Add a big-core mode that joins two regular cores > ppc/pnv: Add allow for big-core differences in DT generation > ppc/pnv: Implement big-core PVR for Power9/10 > ppc/pnv: Implement Power9 CPU core thread state indirect register > ppc/pnv: Add POWER10 ChipTOD quirk for big-core > ppc/pnv: Add big-core machine property > ppc/pnv: Implement POWER10 PC xscom registers for direct controls > ppc/pnv: Add an LPAR per core machine option > > include/hw/core/cpu.h | 8 + > include/hw/ppc/pnv.h | 7 + > include/hw/ppc/pnv_chip.h | 6 +- > include/hw/ppc/pnv_core.h | 31 ++++ > target/ppc/cpu.h | 41 ++--- > hw/ppc/pnv.c | 298 ++++++++++++++++++++++++++++------- > hw/ppc/pnv_chiptod.c | 7 +- > hw/ppc/pnv_core.c | 130 +++++++++++++-- > hw/ppc/spapr_cpu_core.c | 16 +- > system/cpus.c | 10 ++ > target/ppc/cpu_init.c | 26 +-- > target/ppc/excp_helper.c | 69 ++++---- > target/ppc/misc_helper.c | 104 ++++++------ > target/ppc/timebase_helper.c | 82 +++++----- > 14 files changed, 601 insertions(+), 234 deletions(-) >