diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2023-07-05 22:06:30 +1000 |
|---|---|---|
| committer | Daniel Henrique Barboza <danielhb413@gmail.com> | 2023-07-07 04:47:49 -0300 |
| commit | 934676c7b726fe9cccac02a7a4fa23c1e6a4c91e (patch) | |
| tree | 224301f5dc2250ebf9ae9eea6644e4c0bd35beaa /hw/ppc/pnv.c | |
| parent | 9cdfd1b9f7eb5ecd1267bbd68330a11dcb8aa8f2 (diff) | |
ppc/pnv: SMT support for powernv
Set the TIR default value with the SMT thread index, and place some
standard limits on SMT configurations. Now powernv is able to boot
skiboot and Linux with a SMT topology, including booting a KVM guest.
There are several SPRs and other features (e.g., broadcast msgsnd)
that are not implemented, but not used by OPAL or Linux and can be
added incrementally.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20230705120631.27670-4-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'hw/ppc/pnv.c')
| -rw-r--r-- | hw/ppc/pnv.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index 5f25fe985a..23740f9d07 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -887,6 +887,18 @@ static void pnv_init(MachineState *machine) pnv->num_chips = machine->smp.max_cpus / (machine->smp.cores * machine->smp.threads); + + if (machine->smp.threads > 8) { + error_report("Cannot support more than 8 threads/core " + "on a powernv machine"); + exit(1); + } + if (!is_power_of_2(machine->smp.threads)) { + error_report("Cannot support %d threads/core on a powernv" + "machine because it must be a power of 2", + machine->smp.threads); + exit(1); + } /* * TODO: should we decide on how many chips we can create based * on #cores and Venice vs. Murano vs. Naples chip type etc..., |