linux-kernel - Re: [PATCH 1/2] x86/amd_nb: Add AMD Family 19h A0-AF IDs

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Message-ID: <20220601223056.GA10215@bhelgaas>
Date:   Wed, 1 Jun 2022 17:30:56 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Mario Limonciello <mario.limonciello@....com>
Cc:     Clemens Ladisch <clemens@...isch.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Yazen Ghannam <yazen.ghannam@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>,
        "open list:PCI SUBSYSTEM" <linux-pci@...r.kernel.org>,
        linux-hwmon@...r.kernel.org,
        Gabriel Craciunescu <nix.or.die@...glemail.com>,
        babu.moger@....com
Subject: Re: [PATCH 1/2] x86/amd_nb: Add AMD Family 19h A0-AF IDs

On Wed, Jun 01, 2022 at 12:21:18PM -0500, Mario Limonciello wrote:
> commit 4fb0abfee424 ("x86/amd_nb: Add AMD Family 19h Models (10h-1Fh)
> and (A0h-AFh) PCI IDs") had claimed to add the IDs for models A0h-AFh,
> but it appears to only have added the models 10h-1Fh.
> 
> Add the actual IDs for A0-AF which are needed for SMN communication to
> work properly in amd_nb.
> 
> Fixes: 4fb0abfee424 ("x86/amd_nb: Add AMD Family 19h Models (10h-1Fh) and (A0h-AFh) PCI IDs")
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
>  arch/x86/kernel/amd_nb.c | 5 +++++
>  include/linux/pci_ids.h  | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
> index 190e0f763375..cc8c7cfa9068 100644
> --- a/arch/x86/kernel/amd_nb.c
> +++ b/arch/x86/kernel/amd_nb.c
> @@ -25,11 +25,13 @@
>  #define PCI_DEVICE_ID_AMD_17H_M30H_DF_F4 0x1494
>  #define PCI_DEVICE_ID_AMD_17H_M60H_DF_F4 0x144c
>  #define PCI_DEVICE_ID_AMD_17H_M70H_DF_F4 0x1444
> +#define PCI_DEVICE_ID_AMD_19H_MA0H_ROOT	0x14b5
>  #define PCI_DEVICE_ID_AMD_19H_DF_F4	0x1654
>  #define PCI_DEVICE_ID_AMD_19H_M10H_DF_F4 0x14b1
>  #define PCI_DEVICE_ID_AMD_19H_M40H_ROOT	0x14b5
>  #define PCI_DEVICE_ID_AMD_19H_M40H_DF_F4 0x167d
>  #define PCI_DEVICE_ID_AMD_19H_M50H_DF_F4 0x166e
> +#define PCI_DEVICE_ID_AMD_19H_MA0H_DF_F4 0x1728
>  
>  /* Protect the PCI config register pairs used for SMN. */
>  static DEFINE_MUTEX(smn_mutex);
> @@ -43,6 +45,7 @@ static const struct pci_device_id amd_root_ids[] = {
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M60H_ROOT) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M10H_ROOT) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M40H_ROOT) },
> +	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_MA0H_ROOT) },
>  	{}
>  };
>  
> @@ -67,6 +70,7 @@ static const struct pci_device_id amd_nb_misc_ids[] = {
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M10H_DF_F3) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M40H_DF_F3) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M50H_DF_F3) },
> +	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_MA0H_DF_F3) },
>  	{}
>  };
>  
> @@ -85,6 +89,7 @@ static const struct pci_device_id amd_nb_link_ids[] = {
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M10H_DF_F4) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M40H_DF_F4) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M50H_DF_F4) },
> +	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_MA0H_DF_F4) },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CNB17H_F4) },
>  	{}
>  };
> diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
> index 0178823ce8c2..05b4c67a8a2a 100644
> --- a/include/linux/pci_ids.h
> +++ b/include/linux/pci_ids.h
> @@ -560,6 +560,7 @@
>  #define PCI_DEVICE_ID_AMD_19H_M10H_DF_F3 0x14b0
>  #define PCI_DEVICE_ID_AMD_19H_M40H_DF_F3 0x167c
>  #define PCI_DEVICE_ID_AMD_19H_M50H_DF_F3 0x166d
> +#define PCI_DEVICE_ID_AMD_19H_MA0H_DF_F3 0x1727

This file is nominally sorted by numeric device ID inside the vendor
section, but that has really deteriorated over time.

I can't quite figure out the rationale for deciding whether to put
things in amd_nb.c vs pci_ids.h.  The IDs in amd_nb.c look basically
the same as this one.

Normally we put things in pci_ids.h if they are used more than one
place.  PCI_DEVICE_ID_AMD_19H_MA0H_DF_F3 looks like it's only used in
one place.

>  #define PCI_DEVICE_ID_AMD_CNB17H_F3	0x1703
>  #define PCI_DEVICE_ID_AMD_LANCE		0x2000
>  #define PCI_DEVICE_ID_AMD_LANCE_HOME	0x2001
> -- 
> 2.34.1
>