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x86/amd_nb: Simplify function 3 search

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Use the newly introduced helper function to look up "function 3". Drop
unused PCI IDs and code.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20250107222847.3300430-8-yazen.ghannam@amd.com
This commit is contained in:
Yazen Ghannam 2025-01-07 22:28:42 +00:00 committed by Borislav Petkov (AMD)
parent bc7b2e629e
commit 49b96fc0dd
1 changed files with 1 additions and 45 deletions
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46
arch/x86/kernel/amd_nb.c
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@ -29,31 +29,6 @@ static const struct pci_device_id amd_nb_misc_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M30H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M60H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_MA0H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M70H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_DF_F3) },
{ 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_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) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M00H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M20H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M60H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M70H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI200_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI300_DF_F3) },
{}
};
static const struct pci_device_id hygon_nb_misc_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_HYGON, PCI_DEVICE_ID_AMD_17H_DF_F3) },
{}
};
@ -84,17 +59,6 @@ struct amd_northbridge *node_to_amd_nb(int node)
}
EXPORT_SYMBOL_GPL(node_to_amd_nb);
static struct pci_dev *next_northbridge(struct pci_dev *dev,
const struct pci_device_id *ids)
{
do {
dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
if (!dev)
break;
} while (!pci_match_id(ids, dev));
return dev;
}
/*
* SMN accesses may fail in ways that are difficult to detect here in the called
* functions amd_smn_read() and amd_smn_write(). Therefore, callers must do
@ -183,18 +147,12 @@ EXPORT_SYMBOL_GPL(amd_smn_write);
static int amd_cache_northbridges(void)
{
const struct pci_device_id *misc_ids = amd_nb_misc_ids;
struct pci_dev *misc;
struct amd_northbridge *nb;
u16 i;
if (amd_northbridges.num)
return 0;
if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {
misc_ids = hygon_nb_misc_ids;
}
amd_northbridges.num = amd_num_nodes();
nb = kcalloc(amd_northbridges.num, sizeof(struct amd_northbridge), GFP_KERNEL);
@ -203,11 +161,9 @@ static int amd_cache_northbridges(void)
amd_northbridges.nb = nb;
misc = NULL;
for (i = 0; i < amd_northbridges.num; i++) {
node_to_amd_nb(i)->root = amd_node_get_root(i);
node_to_amd_nb(i)->misc = misc =
next_northbridge(misc, misc_ids);
node_to_amd_nb(i)->misc = amd_node_get_func(i, 3);
/*
* Each Northbridge must have a 'misc' device.