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Message-ID: <20220602015710.GA15220@bhelgaas>
Date: Wed, 1 Jun 2022 20:57:10 -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 06:47:40PM -0500, Mario Limonciello wrote:
> On 6/1/22 17:30, Bjorn Helgaas wrote:
> > 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>
Acked-by: Bjorn Helgaas <bhelgaas@...gle.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.
>
> It seemed like it was more oriented to be sorted by the macro definition
> than the ID.
Yeah, it's kind of a mess. Not really clear which way.
> > 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.
>
> I suppose you weren't on CC for patch 2/2 in this series (thanks
> scripts/get_maintainer.pl), so it's not obvious to you that this ID is used
> in a second place in patch 2. I didn't want to ping pong in/out from
> amd_nb.c in the series.
>
> Here is a lore link to it:
> https://lore.kernel.org/linux-kernel/20220601172121.18612-2-mario.limonciello@amd.com/
>
> >
> > > #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
> > >
>
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