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From: "Kuppuswamy, Sathyanarayanan"  <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Rafael J Wysocki <rjw@rjwysocki.net>,
	H Peter Anvin <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>
Cc: Len Brown <lenb@kernel.org>,
	Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
	Sean Christopherson <seanjc@google.com>,
	Andi Kleen <ak@linux.intel.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	linux-acpi@vger.kernel.org,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [PATCH v7 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support
Date: Tue, 17 Aug 2021 06:55:48 -0700	[thread overview]
Message-ID: <c881e659-bb31-3d08-d7eb-0b260bb90525@linux.intel.com> (raw)
In-Reply-To: <20210720042506.2123009-1-sathyanarayanan.kuppuswamy@linux.intel.com>

Hi,

On 7/19/21 9:25 PM, Kuppuswamy Sathyanarayanan wrote:
> As per ACPI specification r6.4, sec 5.2.12.19, a new sub
> structure – multiprocessor wake-up structure - is added to the
> ACPI Multiple APIC Description Table (MADT) to describe the
> information of the mailbox. If a platform firmware produces the
> multiprocessor wake-up structure, then OS may use this new
> mailbox-based mechanism to wake up the APs.
> 
> Add ACPI MADT wake table parsing support for x86 platform and if
> MADT wake table is present, update apic->wakeup_secondary_cpu with
> new API which uses MADT wake mailbox to wake-up CPU.
> 
> Co-developed-by: Sean Christopherson<sean.j.christopherson@intel.com>
> Signed-off-by: Sean Christopherson<sean.j.christopherson@intel.com>
> Reviewed-by: Andi Kleen<ak@linux.intel.com>
> Reviewed-by: Rafael J. Wysocki<rafael.j.wysocki@intel.com>
> Signed-off-by: Kuppuswamy Sathyanarayanan<sathyanarayanan.kuppuswamy@linux.intel.com>
> ---
> 
> Changes since v6:
>   * Rebased on top of v5.14-rc1.
> 
> Changes since v5:
>   * None ( CCed ACPI list)
> 
> Changes since v4:
>   * Used smp_store_release() in place of WRITE_ONCE().
>   * Addressed some checkpatch warnings.
> 
> Changes since v3:
>   * Removed acpi_mp_wake_mailbox_init() and moved init code to
>     acpi_wakeup_cpu().
>   * Removed redundant NULL pointer check for acpi_mp_wake_mailbox.
>   * Added comments/debug prints as per Rafael's suggestion.
>   * Removed MADT/SVKL ACPI patches from this patchset. It will be
>     merged via ACPICA submission.


Gentle ping! Any comments on this patch?

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

  reply	other threads:[~2021-08-17 13:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20  4:25 [PATCH v7 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support Kuppuswamy Sathyanarayanan
2021-08-17 13:55 ` Kuppuswamy, Sathyanarayanan [this message]
2021-09-17 17:08   ` Kuppuswamy, Sathyanarayanan

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