Merge tag 'x86_platform_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 platform updates from Borislav Petkov:

 - Make sure PCI function 4 IDs of AMD family 0x19, models 0x60-0x7f are
   actually used in the amd_nb.c enumeration

 - Add support for extracting NUMA information from devicetree for
   Hyper-V usages

 - Add PCI device IDs for the new AMD MI300 AI accelerators

 - Annotate an array in struct uv_rtc_timer_head with the new
   __counted_by attribute

 - Rework UV's NMI action parameter handling

* tag 'x86_platform_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/amd_nb: Use Family 19h Models 60h-7Fh Function 4 IDs
  x86/numa: Add Devicetree support
  x86/of: Move the x86_flattree_get_config() call out of x86_dtb_init()
  x86/amd_nb: Add AMD Family MI300 PCI IDs
  x86/platform/uv: Annotate struct uv_rtc_timer_head with __counted_by
  x86/platform/uv: Rework NMI "action" modparam handling

Author: torvalds

arch/x86/Kconfig

@@ -1534,6 +1534,7 @@ config NUMA
 	depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP)
 	default y if X86_BIGSMP
 	select USE_PERCPU_NUMA_NODE_ID
+	select OF_NUMA if OF
 	help
 	  Enable NUMA (Non-Uniform Memory Access) support.
 

arch/x86/include/asm/prom.h

@@ -31,6 +31,11 @@ static inline void x86_dtb_init(void) { }
 #define of_ioapic 0
 #endif
 
+#ifdef CONFIG_OF_EARLY_FLATTREE
+void x86_flattree_get_config(void);
+#else
+static inline void x86_flattree_get_config(void) { }
+#endif
 extern char cmd_line[COMMAND_LINE_SIZE];
 
 #endif /* __ASSEMBLY__ */

arch/x86/kernel/amd_nb.c

@@ -27,6 +27,7 @@
 #define PCI_DEVICE_ID_AMD_1AH_M00H_ROOT		0x153a
 #define PCI_DEVICE_ID_AMD_1AH_M20H_ROOT		0x1507
 #define PCI_DEVICE_ID_AMD_MI200_ROOT		0x14bb
+#define PCI_DEVICE_ID_AMD_MI300_ROOT		0x14f8
 
 #define PCI_DEVICE_ID_AMD_17H_DF_F4		0x1464
 #define PCI_DEVICE_ID_AMD_17H_M10H_DF_F4	0x15ec
@@ -43,6 +44,7 @@
 #define PCI_DEVICE_ID_AMD_19H_M78H_DF_F4	0x12fc
 #define PCI_DEVICE_ID_AMD_1AH_M00H_DF_F4	0x12c4
 #define PCI_DEVICE_ID_AMD_MI200_DF_F4		0x14d4
+#define PCI_DEVICE_ID_AMD_MI300_DF_F4		0x152c
 
 /* Protect the PCI config register pairs used for SMN. */
 static DEFINE_MUTEX(smn_mutex);
@@ -62,6 +64,7 @@ static const struct pci_device_id amd_root_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M00H_ROOT) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M20H_ROOT) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI200_ROOT) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI300_ROOT) },
 	{}
 };
 
@@ -93,6 +96,7 @@ static const struct pci_device_id amd_nb_misc_ids[] = {
 	{ 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_MI200_DF_F3) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI300_DF_F3) },
 	{}
 };
 
@@ -112,9 +116,13 @@ 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_M60H_DF_F4) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M70H_DF_F4) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_19H_M78H_DF_F4) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CNB17H_F4) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_1AH_M00H_DF_F4) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI200_DF_F4) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_MI300_DF_F4) },
 	{}
 };
 

arch/x86/kernel/devicetree.c

@@ -278,7 +278,7 @@ static void __init dtb_apic_setup(void)
 }
 
 #ifdef CONFIG_OF_EARLY_FLATTREE
-static void __init x86_flattree_get_config(void)
+void __init x86_flattree_get_config(void)
 {
 	u32 size, map_len;
 	void *dt;
@@ -300,14 +300,10 @@ static void __init x86_flattree_get_config(void)
 	unflatten_and_copy_device_tree();
 	early_memunmap(dt, map_len);
 }
-#else
-static inline void x86_flattree_get_config(void) { }
 #endif
 
 void __init x86_dtb_init(void)
 {
-	x86_flattree_get_config();
-
 	if (!of_have_populated_dt())
 		return;
 

arch/x86/kernel/setup.c

@@ -1217,6 +1217,8 @@ void __init setup_arch(char **cmdline_p)
 
 	early_acpi_boot_init();
 
+	x86_flattree_get_config();
+
 	initmem_init();
 	dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
 

arch/x86/mm/numa.c

@@ -3,6 +3,7 @@
 #include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/of.h>
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/memblock.h>
@@ -733,6 +734,8 @@ void __init x86_numa_init(void)
 		if (!numa_init(amd_numa_init))
 			return;
 #endif
+		if (acpi_disabled && !numa_init(of_numa_init))
+			return;
 	}
 
 	numa_init(dummy_numa_init);

arch/x86/platform/uv/uv_nmi.c

@@ -17,6 +17,7 @@
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 #include <linux/clocksource.h>
 
 #include <asm/apic.h>
@@ -178,65 +179,67 @@ module_param_named(debug, uv_nmi_debug, int, 0644);
 	} while (0)
 
 /* Valid NMI Actions */
-#define	ACTION_LEN	16
-static struct nmi_action {
-	char	*action;
-	char	*desc;
-} valid_acts[] = {
-	{	"kdump",	"do kernel crash dump"			},
-	{	"dump",		"dump process stack for each cpu"	},
-	{	"ips",		"dump Inst Ptr info for each cpu"	},
-	{	"kdb",		"enter KDB (needs kgdboc= assignment)"	},
-	{	"kgdb",		"enter KGDB (needs gdb target remote)"	},
-	{	"health",	"check if CPUs respond to NMI"		},
+enum action_t {
+	nmi_act_kdump,
+	nmi_act_dump,
+	nmi_act_ips,
+	nmi_act_kdb,
+	nmi_act_kgdb,
+	nmi_act_health,
+	nmi_act_max
 };
-typedef char action_t[ACTION_LEN];
-static action_t uv_nmi_action = { "dump" };
+
+static const char * const actions[nmi_act_max] = {
+	[nmi_act_kdump] = "kdump",
+	[nmi_act_dump] = "dump",
+	[nmi_act_ips] = "ips",
+	[nmi_act_kdb] = "kdb",
+	[nmi_act_kgdb] = "kgdb",
+	[nmi_act_health] = "health",
+};
+
+static const char * const actions_desc[nmi_act_max] = {
+	[nmi_act_kdump] = "do kernel crash dump",
+	[nmi_act_dump] = "dump process stack for each cpu",
+	[nmi_act_ips] = "dump Inst Ptr info for each cpu",
+	[nmi_act_kdb] = "enter KDB (needs kgdboc= assignment)",
+	[nmi_act_kgdb] = "enter KGDB (needs gdb target remote)",
+	[nmi_act_health] = "check if CPUs respond to NMI",
+};
+
+static enum action_t uv_nmi_action = nmi_act_dump;
 
 static int param_get_action(char *buffer, const struct kernel_param *kp)
 {
-	return sprintf(buffer, "%s\n", uv_nmi_action);
+	return sprintf(buffer, "%s\n", actions[uv_nmi_action]);
 }
 
 static int param_set_action(const char *val, const struct kernel_param *kp)
 {
-	int i;
-	int n = ARRAY_SIZE(valid_acts);
-	char arg[ACTION_LEN];
-
-	/* (remove possible '\n') */
-	strscpy(arg, val, strnchrnul(val, sizeof(arg)-1, '\n') - val + 1);
-
-	for (i = 0; i < n; i++)
-		if (!strcmp(arg, valid_acts[i].action))
-			break;
+	int i, n = ARRAY_SIZE(actions);
 
-	if (i < n) {
-		strscpy(uv_nmi_action, arg, sizeof(uv_nmi_action));
-		pr_info("UV: New NMI action:%s\n", uv_nmi_action);
+	i = sysfs_match_string(actions, val);
+	if (i >= 0) {
+		uv_nmi_action = i;
+		pr_info("UV: New NMI action:%s\n", actions[i]);
 		return 0;
 	}
 
-	pr_err("UV: Invalid NMI action:%s, valid actions are:\n", arg);
+	pr_err("UV: Invalid NMI action. Valid actions are:\n");
 	for (i = 0; i < n; i++)
-		pr_err("UV: %-8s - %s\n",
-			valid_acts[i].action, valid_acts[i].desc);
+		pr_err("UV: %-8s - %s\n", actions[i], actions_desc[i]);
+
 	return -EINVAL;
 }
 
 static const struct kernel_param_ops param_ops_action = {
 	.get = param_get_action,
 	.set = param_set_action,
 };
-#define param_check_action(name, p) __param_check(name, p, action_t)
+#define param_check_action(name, p) __param_check(name, p, enum action_t)
 
 module_param_named(action, uv_nmi_action, action, 0644);
 
-static inline bool uv_nmi_action_is(const char *action)
-{
-	return (strncmp(uv_nmi_action, action, strlen(action)) == 0);
-}
-
 /* Setup which NMI support is present in system */
 static void uv_nmi_setup_mmrs(void)
 {
@@ -727,10 +730,10 @@ static void uv_nmi_dump_state_cpu(int cpu, struct pt_regs *regs)
 	if (cpu == 0)
 		uv_nmi_dump_cpu_ip_hdr();
 
-	if (current->pid != 0 || !uv_nmi_action_is("ips"))
+	if (current->pid != 0 || uv_nmi_action != nmi_act_ips)
 		uv_nmi_dump_cpu_ip(cpu, regs);
 
-	if (uv_nmi_action_is("dump")) {
+	if (uv_nmi_action == nmi_act_dump) {
 		pr_info("UV:%sNMI process trace for CPU %d\n", dots, cpu);
 		show_regs(regs);
 	}
@@ -798,7 +801,7 @@ static void uv_nmi_dump_state(int cpu, struct pt_regs *regs, int master)
 		int saved_console_loglevel = console_loglevel;
 
 		pr_alert("UV: tracing %s for %d CPUs from CPU %d\n",
-			uv_nmi_action_is("ips") ? "IPs" : "processes",
+			uv_nmi_action == nmi_act_ips ? "IPs" : "processes",
 			atomic_read(&uv_nmi_cpus_in_nmi), cpu);
 
 		console_loglevel = uv_nmi_loglevel;
@@ -874,7 +877,7 @@ static inline int uv_nmi_kdb_reason(void)
 static inline int uv_nmi_kdb_reason(void)
 {
 	/* Ensure user is expecting to attach gdb remote */
-	if (uv_nmi_action_is("kgdb"))
+	if (uv_nmi_action == nmi_act_kgdb)
 		return 0;
 
 	pr_err("UV: NMI error: KDB is not enabled in this kernel\n");
@@ -950,28 +953,35 @@ static int uv_handle_nmi(unsigned int reason, struct pt_regs *regs)
 	master = (atomic_read(&uv_nmi_cpu) == cpu);
 
 	/* If NMI action is "kdump", then attempt to do it */
-	if (uv_nmi_action_is("kdump")) {
+	if (uv_nmi_action == nmi_act_kdump) {
 		uv_nmi_kdump(cpu, master, regs);
 
 		/* Unexpected return, revert action to "dump" */
 		if (master)
-			strscpy(uv_nmi_action, "dump", sizeof(uv_nmi_action));
+			uv_nmi_action = nmi_act_dump;
 	}
 
 	/* Pause as all CPU's enter the NMI handler */
 	uv_nmi_wait(master);
 
 	/* Process actions other than "kdump": */
-	if (uv_nmi_action_is("health")) {
+	switch (uv_nmi_action) {
+	case nmi_act_health:
 		uv_nmi_action_health(cpu, regs, master);
-	} else if (uv_nmi_action_is("ips") || uv_nmi_action_is("dump")) {
+		break;
+	case nmi_act_ips:
+	case nmi_act_dump:
 		uv_nmi_dump_state(cpu, regs, master);
-	} else if (uv_nmi_action_is("kdb") || uv_nmi_action_is("kgdb")) {
+		break;
+	case nmi_act_kdb:
+	case nmi_act_kgdb:
 		uv_call_kgdb_kdb(cpu, regs, master);
-	} else {
+		break;
+	default:
 		if (master)
-			pr_alert("UV: unknown NMI action: %s\n", uv_nmi_action);
+			pr_alert("UV: unknown NMI action: %d\n", uv_nmi_action);
 		uv_nmi_sync_exit(master);
+		break;
 	}
 
 	/* Clear per_cpu "in_nmi" flag */

arch/x86/platform/uv/uv_time.c

@@ -53,7 +53,7 @@ struct uv_rtc_timer_head {
 	struct {
 		int	lcpu;		/* systemwide logical cpu number */
 		u64	expires;	/* next timer expiration for this cpu */
-	} cpu[];
+	} cpu[] __counted_by(ncpus);
 };
 
 /*

include/linux/pci_ids.h

@@ -579,6 +579,7 @@
 #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_MI200_DF_F3	0x14d3
+#define PCI_DEVICE_ID_AMD_MI300_DF_F3	0x152b
 #define PCI_DEVICE_ID_AMD_CNB17H_F3	0x1703
 #define PCI_DEVICE_ID_AMD_LANCE		0x2000
 #define PCI_DEVICE_ID_AMD_LANCE_HOME	0x2001