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- Add a new PCI ID which belongs to a new AMD CPU family 0x1a

Browse Source 
- Ensure that that last level cache ID is set in all cases, in the AMD
   CPU topology parsing code, in order to prevent invalid scheduling
   domain CPU masks
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Merge tag 'x86_urgent_for_v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Add a new PCI ID which belongs to a new AMD CPU family 0x1a

 - Ensure that that last level cache ID is set in all cases, in the AMD
   CPU topology parsing code, in order to prevent invalid scheduling
   domain CPU masks

* tag 'x86_urgent_for_v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/topology/amd: Ensure that LLC ID is initialized
  x86/amd_nb: Add new PCI IDs for AMD family 0x1a
This commit is contained in:
Linus Torvalds 2024-05-12 08:54:28 -07:00
commit 775a0eca33
3 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/kernel/amd_nb.c
View File

@ -95,6 +95,7 @@ static const struct pci_device_id amd_nb_misc_ids[] = {
{ 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_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) },
{}

16
arch/x86/kernel/cpu/topology_amd.c
View File

@ -119,7 +119,7 @@ static bool parse_8000_001e(struct topo_scan *tscan, bool has_0xb)
return true;
}
static bool parse_fam10h_node_id(struct topo_scan *tscan)
static void parse_fam10h_node_id(struct topo_scan *tscan)
{
union {
struct {
@ -131,20 +131,20 @@ static bool parse_fam10h_node_id(struct topo_scan *tscan)
} nid;
if (!boot_cpu_has(X86_FEATURE_NODEID_MSR))
return false;
return;
rdmsrl(MSR_FAM10H_NODE_ID, nid.msr);
store_node(tscan, nid.nodes_per_pkg + 1, nid.node_id);
tscan->c->topo.llc_id = nid.node_id;
return true;
}
static void legacy_set_llc(struct topo_scan *tscan)
{
unsigned int apicid = tscan->c->topo.initial_apicid;
/* parse_8000_0008() set everything up except llc_id */
tscan->c->topo.llc_id = apicid >> tscan->dom_shifts[TOPO_CORE_DOMAIN];
/* If none of the parsers set LLC ID then use the die ID for it. */
if (tscan->c->topo.llc_id == BAD_APICID)
tscan->c->topo.llc_id = apicid >> tscan->dom_shifts[TOPO_CORE_DOMAIN];
}
static void topoext_fixup(struct topo_scan *tscan)
@ -187,10 +187,7 @@ static void parse_topology_amd(struct topo_scan *tscan)
return;
/* Try the NODEID MSR */
if (parse_fam10h_node_id(tscan))
return;
legacy_set_llc(tscan);
parse_fam10h_node_id(tscan);
}
void cpu_parse_topology_amd(struct topo_scan *tscan)
@ -198,6 +195,7 @@ void cpu_parse_topology_amd(struct topo_scan *tscan)
tscan->amd_nodes_per_pkg = 1;
topoext_fixup(tscan);
parse_topology_amd(tscan);
legacy_set_llc(tscan);
if (tscan->amd_nodes_per_pkg > 1)
set_cpu_cap(tscan->c, X86_FEATURE_AMD_DCM);

1
include/linux/pci_ids.h
View File

@ -580,6 +580,7 @@
#define PCI_DEVICE_ID_AMD_19H_M78H_DF_F3 0x12fb
#define PCI_DEVICE_ID_AMD_1AH_M00H_DF_F3 0x12c3
#define PCI_DEVICE_ID_AMD_1AH_M20H_DF_F3 0x16fb
#define PCI_DEVICE_ID_AMD_1AH_M70H_DF_F3 0x12bb
#define PCI_DEVICE_ID_AMD_MI200_DF_F3 0x14d3
#define PCI_DEVICE_ID_AMD_MI300_DF_F3 0x152b
#define PCI_DEVICE_ID_AMD_VANGOGH_USB 0x163a