From: Thomas Gleixner <tglx@linutronix.de>
To: Michael Ellerman <mpe@ellerman.id.au>, linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, x86@kernel.org,
dave.hansen@linux.intel.com, mingo@redhat.com, bp@alien8.de,
ldufour@linux.ibm.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 4/9] cpu/SMT: Create topology_smt_threads_supported()
Date: Sun, 11 Jun 2023 00:15:52 +0200 [thread overview]
Message-ID: <878rcr7ylj.ffs@tglx> (raw)
In-Reply-To: <20230524155630.794584-4-mpe@ellerman.id.au>
On Thu, May 25 2023 at 01:56, Michael Ellerman wrote:
> +/**
> + * topology_smt_threads_supported - Check if the given number of SMT threads
> + * is supported.
> + *
> + * @threads: The number of SMT threads.
> + */
> +bool topology_smt_threads_supported(unsigned int threads)
> +{
> + // Only support a single thread or all threads.
> + return threads == 1 || threads == smp_num_siblings;
> +}
You can make that a simple core function when cpu_smt_*_threads is
consistent along the lines of my previous reply.
static bool cpu_smt_num_threads_valid(unsigned int threads)
{
if (IS_ENABLED(CONFIG_SMT_NUM_THREADS_DYNAMIC))
return threads >= 1 && threads <= cpu_smt_max_threads;
return threads == 1 || threads == cpu_smt_max_threads;
}
Or something like that.
Thanks,
tglx
next prev parent reply other threads:[~2023-06-10 22:16 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 15:56 [PATCH 1/9] cpu/SMT: Move SMT prototypes into cpu_smt.h Michael Ellerman
2023-05-24 15:56 ` [PATCH 2/9] cpu/SMT: Move smt/control simple exit cases earlier Michael Ellerman
2023-05-24 15:56 ` [PATCH 3/9] cpu/SMT: Store the current/max number of threads Michael Ellerman
2023-06-10 21:26 ` Thomas Gleixner
2023-06-10 22:08 ` Thomas Gleixner
2023-06-13 17:16 ` Laurent Dufour
2023-06-13 18:53 ` Thomas Gleixner
2023-06-14 12:27 ` Laurent Dufour
2023-05-24 15:56 ` [PATCH 4/9] cpu/SMT: Create topology_smt_threads_supported() Michael Ellerman
2023-06-10 22:15 ` Thomas Gleixner [this message]
2023-05-24 15:56 ` [PATCH 5/9] cpu/SMT: Create topology_smt_thread_allowed() Michael Ellerman
2023-06-10 22:35 ` Thomas Gleixner
2023-05-24 15:56 ` [PATCH 6/9] cpu/SMT: Allow enabling partial SMT states via sysfs Michael Ellerman
2023-06-10 20:09 ` Thomas Gleixner
2023-06-10 20:13 ` Thomas Gleixner
2023-05-24 15:56 ` [PATCH 7/9] powerpc/pseries: Initialise CPU hotplug callbacks earlier Michael Ellerman
2023-05-24 15:56 ` [PATCH 8/9] powerpc: Add HOTPLUG_SMT support Michael Ellerman
2023-06-01 13:27 ` Laurent Dufour
2023-06-01 16:19 ` Laurent Dufour
2023-06-10 21:10 ` Thomas Gleixner
2023-06-12 15:20 ` Laurent Dufour
2023-06-12 16:34 ` Thomas Gleixner
2023-05-24 15:56 ` [PATCH 9/9] powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs Michael Ellerman
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