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Message-ID: <20230427053338.16653-2-mario.limonciello@amd.com>
Date: Thu, 27 Apr 2023 00:33:36 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Hans de Goede <hdegoede@...hat.com>,
Shyam Sundar S K <Shyam-sundar.S-k@....com>,
Sanket Goswami <Sanket.Goswami@....com>
CC: Richard gong <richard.gong@....com>,
Mario Limonciello <mario.limonciello@....com>,
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>,
"H. Peter Anvin" <hpa@...or.com>, <linux-kernel@...r.kernel.org>,
<linux-pci@...r.kernel.org>
Subject: [PATCH 1/2] amd_nb: Add PCI ID for family 19h model 78h
s2idle previously worked on this system, but it regressed in kernel
6.4 due to commit 310e782a99c7 ("platform/x86/amd: pmc: Utilize SMN
index 0 for driver probe").
The reason for the regression is that before this commit the SMN
communication was hardcoded, but after amd_smn_read() is used which
relies upon the misc PCI ID used by DF function 3 being included in
a table. The ID was missing for model 78h, so this meant that the
amd_smn_read() wouldn't work.
Add the missing ID into amd_nb, restoring s2idle on this system.
Fixes: 310e782a99c7 ("platform/x86/amd: pmc: Utilize SMN index 0 for driver probe")
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
arch/x86/kernel/amd_nb.c | 2 ++
include/linux/pci_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index 4266b64631a4..7e331e8f3692 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -36,6 +36,7 @@
#define PCI_DEVICE_ID_AMD_19H_M50H_DF_F4 0x166e
#define PCI_DEVICE_ID_AMD_19H_M60H_DF_F4 0x14e4
#define PCI_DEVICE_ID_AMD_19H_M70H_DF_F4 0x14f4
+#define PCI_DEVICE_ID_AMD_19H_M78H_DF_F4 0x12fc
/* Protect the PCI config register pairs used for SMN. */
static DEFINE_MUTEX(smn_mutex);
@@ -79,6 +80,7 @@ static const struct pci_device_id amd_nb_misc_ids[] = {
{ 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_M60H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M70H_DF_F3) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M78H_DF_F3) },
{}
};
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 45c3d62e616d..95f33dadb2be 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -567,6 +567,7 @@
#define PCI_DEVICE_ID_AMD_19H_M50H_DF_F3 0x166d
#define PCI_DEVICE_ID_AMD_19H_M60H_DF_F3 0x14e3
#define PCI_DEVICE_ID_AMD_19H_M70H_DF_F3 0x14f3
+#define PCI_DEVICE_ID_AMD_19H_M78H_DF_F3 0x12fb
#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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