linux-kernel - Re: [PATCHv7 01/16] x86/acpi: Extract ACPI MADT wakeup code into a separate file

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Message-ID: <a2cmua3qhbmhgzdxl5mszuvatnkyf4nwxjciurguhgbulrhin4@gvswvfats5er>
Date: Mon, 19 Feb 2024 12:08:26 +0200
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: Baoquan He <bhe@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	"Rafael J. Wysocki" <rafael@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>, Elena Reshetova <elena.reshetova@...el.com>, 
	Jun Nakajima <jun.nakajima@...el.com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	Tom Lendacky <thomas.lendacky@....com>, "Kalra, Ashish" <ashish.kalra@....com>, 
	Sean Christopherson <seanjc@...gle.com>, "Huang, Kai" <kai.huang@...el.com>, kexec@...ts.infradead.org, 
	linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv7 01/16] x86/acpi: Extract ACPI MADT wakeup code into a
 separate file

On Mon, Feb 19, 2024 at 12:45:31PM +0800, Baoquan He wrote:
> Do we need add the entry printing for ACPI_MADT_TYPE_MULTIPROC_WAKEUP
> now in acpi_table_print_madt_entry()? Surely it's not related to this
> patch.

Good catch. See patch below. Does it look okay?

> FWIW, 
> 
> Reviewed-by: Baoquan He <bhe@...hat.com>

Thanks!

>From 23b7f9856a3d6b91c702def1e03872a60ae07d0e Mon Sep 17 00:00:00 2001
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Date: Mon, 19 Feb 2024 11:58:19 +0200
Subject: [PATCH] ACPI: tables: Print MULTIPROC_WAKEUP when MADT is parse

When MADT is parsed, print MULTIPROC_WAKEUP information:

ACPI: MP Wakeup (version[1], mailbox[0x7fffd000], reset[0x7fffe068])

This debug information will be very helpful during bring up.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 drivers/acpi/tables.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index b07f7d091d13..c59a3617bca7 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -198,6 +198,20 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
 		}
 		break;
 
+	case ACPI_MADT_TYPE_MULTIPROC_WAKEUP:
+		{
+			struct acpi_madt_multiproc_wakeup *p =
+				(struct acpi_madt_multiproc_wakeup *)header;
+			u64 reset_vector = 0;
+
+			if (p->version >= ACPI_MADT_MP_WAKEUP_VERSION_V1)
+				reset_vector = p->reset_vector;
+
+			pr_debug("MP Wakeup (version[%d], mailbox[%#llx], reset[%#llx])\n",
+				 p->version, p->mailbox_address, reset_vector);
+		}
+		break;
+
 	case ACPI_MADT_TYPE_CORE_PIC:
 		{
 			struct acpi_madt_core_pic *p = (struct acpi_madt_core_pic *)header;
-- 
2.43.0

-- 
  Kiryl Shutsemau / Kirill A. Shutemov