From: Borislav Petkov <bp@alien8.de>
To: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: linux-kernel@vger.kernel.org, rafael@kernel.org, lenb@kernel.org,
linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org,
dave.hansen@linux.intel.com, tglx@linutronix.de, andi@lisas.de,
puwen@hygon.cn, mario.limonciello@amd.com, peterz@infradead.org,
rui.zhang@intel.com, gpiccoli@igalia.com,
daniel.lezcano@linaro.org, ananth.narayan@amd.com,
gautham.shenoy@amd.com, Calvin Ong <calvin.ong@amd.com>,
stable@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture
Date: Wed, 21 Sep 2022 10:47:38 +0200 [thread overview]
Message-ID: <YyrPqlo/ysCeh4qU@zn.tnic> (raw)
In-Reply-To: <20220921063638.2489-1-kprateek.nayak@amd.com>
On Wed, Sep 21, 2022 at 12:06:38PM +0530, K Prateek Nayak wrote:
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index 16a1663d02d4..18850aa2b79b 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -528,8 +528,11 @@ static int acpi_idle_bm_check(void)
> static void wait_for_freeze(void)
> {
> #ifdef CONFIG_X86
> - /* No delay is needed if we are in guest */
> - if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
> + /*
> + * No delay is needed if we are in guest or on a processor
> + * based on the Zen microarchitecture.
> + */
> + if (boot_cpu_has(X86_FEATURE_HYPERVISOR) || boot_cpu_has(X86_FEATURE_ZEN))
s/boot_cpu_has/cpu_feature_enabled/g
while at it.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2022-09-21 8:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-21 6:36 [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture K Prateek Nayak
2022-09-21 8:47 ` Borislav Petkov [this message]
2022-09-21 10:39 ` K Prateek Nayak
2022-09-21 13:10 ` Borislav Petkov
2022-09-21 14:15 ` Dave Hansen
2022-09-21 19:51 ` Borislav Petkov
2022-09-21 19:55 ` Limonciello, Mario
2022-09-22 3:58 ` Ananth Narayan
2022-09-22 5:44 ` K Prateek Nayak
[not found] ` <20220923160106.9297-1-ermorton@ericmoronsm1mbp.amd.com>
2022-09-23 16:15 ` Ananth Narayan
2022-09-21 15:00 ` Peter Zijlstra
2022-09-21 19:48 ` Borislav Petkov
2022-09-22 8:17 ` Peter Zijlstra
2022-09-22 15:21 ` Rafael J. Wysocki
2022-09-22 15:36 ` Borislav Petkov
2022-09-22 15:53 ` Rafael J. Wysocki
2022-09-22 16:36 ` Dave Hansen
2022-09-22 16:44 ` Dave Hansen
2022-09-22 16:54 ` K Prateek Nayak
2022-09-22 17:01 ` Dave Hansen
2022-09-22 17:48 ` Limonciello, Mario
2022-09-22 18:17 ` Dave Hansen
2022-09-22 18:28 ` Limonciello, Mario
2022-09-23 11:47 ` Ananth Narayan
2022-09-22 19:42 ` Andreas Mohr
2022-09-22 20:10 ` Andreas Mohr
2022-09-22 21:21 ` Dave Hansen
2022-09-22 21:38 ` Limonciello, Mario
2022-09-23 7:42 ` Peter Zijlstra
2022-09-23 7:57 ` Peter Zijlstra
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