x86/apic: Use u32 for APIC IDs in global data

APIC IDs are used with random data types u16, u32, int, unsigned int,
unsigned long.

Make it all consistently use u32 because that reflects the hardware
register width and fixup the most obvious usage sites of that.

The APIC callbacks will be addressed separately.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230814085112.922905727@linutronix.de

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 5af4ec1a0f71cf9e232aa394981e53ede090d088..a7ac05ce9ac5ee85605028fe80ffb178b6325895 100644 (file)
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -54,7 +54,7 @@ extern int local_apic_timer_c2_ok;
 extern bool apic_is_disabled;
 extern unsigned int lapic_timer_period;
 
-extern int cpuid_to_apicid[];
+extern u32 cpuid_to_apicid[];
 
 extern enum apic_intr_mode_id apic_intr_mode;
 enum apic_intr_mode_id {
@@ -517,9 +517,9 @@ extern void generic_bigsmp_probe(void);
 
 extern struct apic apic_noop;
 
-static inline unsigned int read_apic_id(void)
+static inline u32 read_apic_id(void)
 {
-       unsigned int reg = apic_read(APIC_ID);
+       u32 reg = apic_read(APIC_ID);
 
        return apic->get_apic_id(reg);
 }
@@ -544,7 +544,7 @@ extern int default_cpu_present_to_apicid(int mps_cpu);
 
 #else /* CONFIG_X86_LOCAL_APIC */
 
-static inline unsigned int read_apic_id(void) { return 0; }
+static inline u32 read_apic_id(void) { return 0; }
 
 #endif /* !CONFIG_X86_LOCAL_APIC */
 

diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index f46df8349e86d11d94c7f58b118aee00a881e716..4b0f98a8d338d5c56371e4af161ae335cde7528a 100644 (file)
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -37,7 +37,7 @@ extern int mp_bus_id_to_type[MAX_MP_BUSSES];
 
 extern DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
 
-extern unsigned int boot_cpu_physical_apicid;
+extern u32 boot_cpu_physical_apicid;
 extern u8 boot_cpu_apic_version;
 
 #ifdef CONFIG_X86_LOCAL_APIC

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index d529d8a9ab5ed7e5f471974326ab182b48d9edc8..ffd03123b739c51294a2af5ddc7e89f788715f40 100644 (file)
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -693,12 +693,12 @@ extern int set_tsc_mode(unsigned int val);
 
 DECLARE_PER_CPU(u64, msr_misc_features_shadow);
 
-static inline u16 per_cpu_llc_id(unsigned int cpu)
+static inline u32 per_cpu_llc_id(unsigned int cpu)
 {
        return per_cpu(cpu_info.topo.llc_id, cpu);
 }
 
-static inline u16 per_cpu_l2c_id(unsigned int cpu)
+static inline u32 per_cpu_l2c_id(unsigned int cpu)
 {
        return per_cpu(cpu_info.topo.l2c_id, cpu);
 }

diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index b291db463b1dbdf7cdf130426dedc75f99945857..eb74097f43304294152feb8698e77135daa07d5c 100644 (file)
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -18,7 +18,7 @@ DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
 
-DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
+DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
 
 struct task_struct;

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index d2b1d60c752aeafe58cc995dbe1eb34cb8905b22..41093cf20acdce9dad2d67ef420acf53bedfc7b5 100644 (file)
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -72,7 +72,7 @@ unsigned int num_processors;
 unsigned disabled_cpus;
 
 /* Processor that is doing the boot up */
-unsigned int boot_cpu_physical_apicid __ro_after_init = BAD_APICID;
+u32 boot_cpu_physical_apicid __ro_after_init = BAD_APICID;
 EXPORT_SYMBOL_GPL(boot_cpu_physical_apicid);
 
 u8 boot_cpu_apic_version __ro_after_init;
@@ -87,7 +87,7 @@ physid_mask_t phys_cpu_present_map;
  * disable_cpu_apicid=<int>, mostly used for the kdump 2nd kernel to
  * avoid undefined behaviour caused by sending INIT from AP to BSP.
  */
-static unsigned int disabled_cpu_apicid __ro_after_init = BAD_APICID;
+static u32 disabled_cpu_apicid __ro_after_init = BAD_APICID;
 
 /*
  * This variable controls which CPUs receive external NMIs.  By default,
@@ -111,7 +111,7 @@ static inline bool apic_accessible(void)
 /*
  * Map cpu index to physical APIC ID
  */
-DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid, BAD_APICID);
+DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid, BAD_APICID);
 DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX);
 EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
 EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid);
@@ -1765,7 +1765,7 @@ static void __x2apic_enable(void)
 static int __init setup_nox2apic(char *str)
 {
        if (x2apic_enabled()) {
-               int apicid = native_apic_msr_read(APIC_ID);
+               u32 apicid = native_apic_msr_read(APIC_ID);
 
                if (apicid >= 255) {
                        pr_warn("Apicid: %08x, cannot enforce nox2apic\n",
@@ -2318,11 +2318,11 @@ static int nr_logical_cpuids = 1;
 /*
  * Used to store mapping between logical CPU IDs and APIC IDs.
  */
-int cpuid_to_apicid[] = { [0 ... NR_CPUS - 1] = BAD_APICID, };
+u32 cpuid_to_apicid[] = { [0 ... NR_CPUS - 1] = BAD_APICID, };
 
 bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
 {
-       return phys_id == cpuid_to_apicid[cpu];
+       return phys_id == (u64)cpuid_to_apicid[cpu];
 }
 
 #ifdef CONFIG_SMP
@@ -2391,7 +2391,7 @@ static int allocate_logical_cpuid(int apicid)
        return nr_logical_cpuids++;
 }
 
-static void cpu_update_apic(int cpu, int apicid)
+static void cpu_update_apic(int cpu, u32 apicid)
 {
 #if defined(CONFIG_SMP) || defined(CONFIG_X86_64)
        early_per_cpu(x86_cpu_to_apicid, cpu) = apicid;
@@ -2544,7 +2544,7 @@ static struct {
         */
        int active;
        /* r/w apic fields */
-       unsigned int apic_id;
+       u32 apic_id;
        unsigned int apic_taskpri;
        unsigned int apic_ldr;
        unsigned int apic_dfr;

diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index a44ba7209ef3a854e36444af9ad53c7314772fbb..0078730a512e2b524753e06401bc6dbe2e0da93c 100644 (file)
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -281,7 +281,7 @@ void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
 }
 
 #ifdef CONFIG_SMP
-static int convert_apicid_to_cpu(int apic_id)
+static int convert_apicid_to_cpu(u32 apic_id)
 {
        int i;
 
@@ -294,7 +294,8 @@ static int convert_apicid_to_cpu(int apic_id)
 
 int safe_smp_processor_id(void)
 {
-       int apicid, cpuid;
+       u32 apicid;
+       int cpuid;
 
        if (!boot_cpu_has(X86_FEATURE_APIC))
                return 0;

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index b8ab9ee5896c191611b89ab6aa0a672304bbdb06..0ddb3bd0f1aac7cda767c240bb21bfdfbff39d62 100644 (file)
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -500,13 +500,13 @@ static bool pv_sched_yield_supported(void)
 static void __send_ipi_mask(const struct cpumask *mask, int vector)
 {
        unsigned long flags;
-       int cpu, apic_id, icr;
-       int min = 0, max = 0;
+       int cpu, min = 0, max = 0;
 #ifdef CONFIG_X86_64
        __uint128_t ipi_bitmap = 0;
 #else
        u64 ipi_bitmap = 0;
 #endif
+       u32 apic_id, icr;
        long ret;
 
        if (cpumask_empty(mask))
@@ -1028,8 +1028,8 @@ arch_initcall(activate_jump_labels);
 /* Kick a cpu by its apicid. Used to wake up a halted vcpu */
 static void kvm_kick_cpu(int cpu)
 {
-       int apicid;
        unsigned long flags = 0;
+       u32 apicid;
 
        apicid = per_cpu(x86_cpu_to_apicid, cpu);
        kvm_hypercall2(KVM_HC_KICK_CPU, flags, apicid);

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 2aadb2019b4f235b58dbbc3a2aaa54f3c2da4921..02ee0d115e710098e8c9d679e9dad89abf6590bd 100644 (file)
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -56,7 +56,7 @@ s16 __apicid_to_node[MAX_LOCAL_APIC] = {
 
 int numa_cpu_node(int cpu)
 {
-       int apicid = early_per_cpu(x86_cpu_to_apicid, cpu);
+       u32 apicid = early_per_cpu(x86_cpu_to_apicid, cpu);
 
        if (apicid != BAD_APICID)
                return __apicid_to_node[apicid];
@@ -786,7 +786,7 @@ void __init init_gi_nodes(void)
 void __init init_cpu_to_node(void)
 {
        int cpu;
-       u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);
+       u32 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);
 
        BUG_ON(cpu_to_apicid == NULL);