[PATCH v2 2/8] x86/CPU/AMD: Remove amd_get_nb_id()

[Yazen Ghannam <Yazen.Ghannam@amd.com>]

From: Yazen Ghannam <yazen.ghannam@amd.com>

The Last Level Cache ID is returned by amd_get_nb_id(). In practice,
this value is the same as the AMD NodeId for callers of this function.
The NodeId is saved in struct cpuinfo_x86.node_id.

Replace calls to amd_get_nb_id() with the logical CPU's node_id and
remove the function.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20200814191449.183998-2-Yazen.Ghannam@amd.com

v1 -> v2:
* New patch.

 arch/x86/events/amd/core.c       | 2 +-
 arch/x86/include/asm/processor.h | 2 --
 arch/x86/kernel/amd_nb.c         | 4 ++--
 arch/x86/kernel/cpu/amd.c        | 6 ------
 arch/x86/kernel/cpu/cacheinfo.c  | 2 +-
 arch/x86/kernel/cpu/mce/amd.c    | 4 ++--
 arch/x86/kernel/cpu/mce/inject.c | 4 ++--
 drivers/edac/amd64_edac.c        | 4 ++--
 drivers/edac/mce_amd.c           | 2 +-
 9 files changed, 11 insertions(+), 19 deletions(-)

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 39eb276d0277..01b9b943dcf4 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -538,7 +538,7 @@ static void amd_pmu_cpu_starting(int cpu)
 	if (!x86_pmu.amd_nb_constraints)
 		return;
 
-	nb_id = amd_get_nb_id(cpu);
+	nb_id = cpu_data(cpu).node_id;
 	WARN_ON_ONCE(nb_id == BAD_APICID);
 
 	for_each_online_cpu(i) {
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index a776b7886ec0..408977a323d3 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -871,10 +871,8 @@ extern int set_tsc_mode(unsigned int val);
 DECLARE_PER_CPU(u64, msr_misc_features_shadow);
 
 #ifdef CONFIG_CPU_SUP_AMD
-extern u16 amd_get_nb_id(int cpu);
 extern u32 amd_get_nodes_per_socket(void);
 #else
-static inline u16 amd_get_nb_id(int cpu)		{ return 0; }
 static inline u32 amd_get_nodes_per_socket(void)	{ return 0; }
 #endif
 
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index 18f6b7c4bd79..2bd8abdbed8e 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -384,7 +384,7 @@ struct resource *amd_get_mmconfig_range(struct resource *res)
 
 int amd_get_subcaches(int cpu)
 {
-	struct pci_dev *link = node_to_amd_nb(amd_get_nb_id(cpu))->link;
+	struct pci_dev *link = node_to_amd_nb(cpu_data(cpu).node_id)->link;
 	unsigned int mask;
 
 	if (!amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
@@ -398,7 +398,7 @@ int amd_get_subcaches(int cpu)
 int amd_set_subcaches(int cpu, unsigned long mask)
 {
 	static unsigned int reset, ban;
-	struct amd_northbridge *nb = node_to_amd_nb(amd_get_nb_id(cpu));
+	struct amd_northbridge *nb = node_to_amd_nb(cpu_data(cpu).node_id);
 	unsigned int reg;
 	int cuid;
 
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 5eef4cc1e5b7..846367a69c4a 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -424,12 +424,6 @@ static void amd_detect_ppin(struct cpuinfo_x86 *c)
 	clear_cpu_cap(c, X86_FEATURE_AMD_PPIN);
 }
 
-u16 amd_get_nb_id(int cpu)
-{
-	return per_cpu(cpu_llc_id, cpu);
-}
-EXPORT_SYMBOL_GPL(amd_get_nb_id);
-
 u32 amd_get_nodes_per_socket(void)
 {
 	return nodes_per_socket;
diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index 81dfddae4470..8e34e90bb872 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -580,7 +580,7 @@ static void amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index)
 	if (index < 3)
 		return;
 
-	node = amd_get_nb_id(smp_processor_id());
+	node = cpu_data(smp_processor_id()).node_id;
 	this_leaf->nb = node_to_amd_nb(node);
 	if (this_leaf->nb && !this_leaf->nb->l3_cache.indices)
 		amd_calc_l3_indices(this_leaf->nb);
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 0c6b02dd744c..be96f77004ad 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -1341,7 +1341,7 @@ static int threshold_create_bank(struct threshold_bank **bp, unsigned int cpu,
 		return -ENODEV;
 
 	if (is_shared_bank(bank)) {
-		nb = node_to_amd_nb(amd_get_nb_id(cpu));
+		nb = node_to_amd_nb(cpu_data(cpu).node_id);
 
 		/* threshold descriptor already initialized on this node? */
 		if (nb && nb->bank4) {
@@ -1445,7 +1445,7 @@ static void threshold_remove_bank(struct threshold_bank *bank)
 		 * The last CPU on this node using the shared bank is going
 		 * away, remove that bank now.
 		 */
-		nb = node_to_amd_nb(amd_get_nb_id(smp_processor_id()));
+		nb = node_to_amd_nb(cpu_data(smp_processor_id()).node_id);
 		nb->bank4 = NULL;
 	}
 
diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 3a44346f2276..ba491134c326 100644
--- a/arch/x86/kernel/cpu/mce/inject.c
+++ b/arch/x86/kernel/cpu/mce/inject.c
@@ -522,8 +522,8 @@ static void do_inject(void)
 	if (boot_cpu_has(X86_FEATURE_AMD_DCM) &&
 	    b == 4 &&
 	    boot_cpu_data.x86 < 0x17) {
-		toggle_nb_mca_mst_cpu(amd_get_nb_id(cpu));
-		cpu = get_nbc_for_node(amd_get_nb_id(cpu));
+		toggle_nb_mca_mst_cpu(cpu_data(cpu).node_id);
+		cpu = get_nbc_for_node(cpu_data(cpu).node_id);
 	}
 
 	get_online_cpus();
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index fcc08bbf6945..3f91cac00fb2 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1133,7 +1133,7 @@ static int k8_early_channel_count(struct amd64_pvt *pvt)
 /* On F10h and later ErrAddr is MC4_ADDR[47:1] */
 static u64 get_error_address(struct amd64_pvt *pvt, struct mce *m)
 {
-	u16 mce_nid = amd_get_nb_id(m->extcpu);
+	u16 mce_nid = cpu_data(m->extcpu).node_id;
 	struct mem_ctl_info *mci;
 	u8 start_bit = 1;
 	u8 end_bit   = 47;
@@ -3046,7 +3046,7 @@ static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, u16 nid)
 	int cpu;
 
 	for_each_online_cpu(cpu)
-		if (amd_get_nb_id(cpu) == nid)
+		if (cpu_data(cpu).node_id == nid)
 			cpumask_set_cpu(cpu, mask);
 }
 
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 7f28edb070bd..ac9bd74c92cd 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -869,7 +869,7 @@ static void decode_mc3_mce(struct mce *m)
 static void decode_mc4_mce(struct mce *m)
 {
 	unsigned int fam = x86_family(m->cpuid);
-	int node_id = amd_get_nb_id(m->extcpu);
+	int node_id = cpu_data(m->extcpu).node_id;
 	u16 ec = EC(m->status);
 	u8 xec = XEC(m->status, 0x1f);
 	u8 offset = 0;
-- 
2.25.1