x86/apic: Nuke unused apic::inquire_remote_apic()

KAGA-KOKO · hansendc · commit 1d90c9f73130 · 2023-08-09T11:58:18.000-07:00
Put it to the other historical leftovers.

Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Signed-off-by: Dave Hansen &lt;dave.hansen@linux.intel.com&gt;
Acked-by: Peter Zijlstra (Intel) &lt;peterz@infradead.org&gt;
Tested-by: Michael Kelley &lt;mikelley@microsoft.com&gt;
Tested-by: Sohil Mehta &lt;sohil.mehta@intel.com&gt;
Tested-by: Juergen Gross &lt;jgross@suse.com&gt; # Xen PV (dom0 and unpriv. guest)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
@@ -66,20 +66,6 @@ enum apic_intr_mode_id {
 	APIC_SYMMETRIC_IO_NO_ROUTING
 };
 
-#ifdef CONFIG_SMP
-extern void __inquire_remote_apic(int apicid);
-#else /* CONFIG_SMP */
-static inline void __inquire_remote_apic(int apicid)
-{
-}
-#endif /* CONFIG_SMP */
-
-static inline void default_inquire_remote_apic(int apicid)
-{
-	if (apic_verbosity >= APIC_DEBUG)
-		__inquire_remote_apic(apicid);
-}
-
 /*
  * With 82489DX we can't rely on apic feature bit
  * retrieved via cpuid but still have to deal with
@@ -330,8 +316,6 @@ struct apic {
 	/* wakeup secondary CPU using 64-bit wakeup point */
 	int	(*wakeup_secondary_cpu_64)(int apicid, unsigned long start_eip);
 
-	void	(*inquire_remote_apic)(int apicid);
-
 #ifdef CONFIG_X86_32
 	/*
 	 * Called very early during boot from get_smp_config().  It should
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
@@ -139,8 +139,6 @@ static struct apic apic_flat __ro_after_init = {
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.inquire_remote_apic		= default_inquire_remote_apic,
-
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
 	.eoi_write			= native_apic_mem_write,
@@ -230,8 +228,6 @@ static struct apic apic_physflat __ro_after_init = {
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.inquire_remote_apic		= default_inquire_remote_apic,
-
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
 	.eoi_write			= native_apic_mem_write,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
@@ -125,8 +125,6 @@ struct apic apic_noop __ro_after_init = {
 
 	.wakeup_secondary_cpu		= noop_wakeup_secondary_cpu,
 
-	.inquire_remote_apic		= NULL,
-
 	.read				= noop_apic_read,
 	.write				= noop_apic_write,
 	.eoi_write			= noop_apic_write,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
@@ -273,7 +273,6 @@ static const struct apic apic_numachip1 __refconst = {
 	.send_IPI_self			= numachip_send_IPI_self,
 
 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
-	.inquire_remote_apic		= NULL, /* REMRD not supported */
 
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
@@ -320,7 +319,6 @@ static const struct apic apic_numachip2 __refconst = {
 	.send_IPI_self			= numachip_send_IPI_self,
 
 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
-	.inquire_remote_apic		= NULL, /* REMRD not supported */
 
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
@@ -153,8 +153,6 @@ static struct apic apic_bigsmp __ro_after_init = {
 	.send_IPI_all			= bigsmp_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.inquire_remote_apic		= default_inquire_remote_apic,
-
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
 	.eoi_write			= native_apic_mem_write,
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
@@ -95,8 +95,6 @@ static struct apic apic_default __ro_after_init = {
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.inquire_remote_apic		= default_inquire_remote_apic,
-
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
 	.eoi_write			= native_apic_mem_write,
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -265,8 +265,6 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.inquire_remote_apic		= NULL,
-
 	.read				= native_apic_msr_read,
 	.write				= native_apic_msr_write,
 	.eoi_write			= native_apic_msr_eoi_write,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
@@ -189,8 +189,6 @@ static struct apic apic_x2apic_phys __ro_after_init = {
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.inquire_remote_apic		= NULL,
-
 	.read				= native_apic_msr_read,
 	.write				= native_apic_msr_write,
 	.eoi_write			= native_apic_msr_eoi_write,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -862,7 +862,6 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
 	.send_IPI_self			= uv_send_IPI_self,
 
 	.wakeup_secondary_cpu		= uv_wakeup_secondary,
-	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
 	.write				= native_apic_msr_write,
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
@@ -774,44 +774,6 @@ static void impress_friends(void)
 	pr_debug("Before bogocount - setting activated=1\n");
 }
 
-void __inquire_remote_apic(int apicid)
-{
-	unsigned i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
-	const char * const names[] = { "ID", "VERSION", "SPIV" };
-	int timeout;
-	u32 status;
-
-	pr_info("Inquiring remote APIC 0x%x...\n", apicid);
-
-	for (i = 0; i < ARRAY_SIZE(regs); i++) {
-		pr_info("... APIC 0x%x %s: ", apicid, names[i]);
-
-		/*
-		 * Wait for idle.
-		 */
-		status = safe_apic_wait_icr_idle();
-		if (status)
-			pr_cont("a previous APIC delivery may have failed\n");
-
-		apic_icr_write(APIC_DM_REMRD | regs[i], apicid);
-
-		timeout = 0;
-		do {
-			udelay(100);
-			status = apic_read(APIC_ICR) & APIC_ICR_RR_MASK;
-		} while (status == APIC_ICR_RR_INPROG && timeout++ < 1000);
-
-		switch (status) {
-		case APIC_ICR_RR_VALID:
-			status = apic_read(APIC_RRR);
-			pr_cont("%08x\n", status);
-			break;
-		default:
-			pr_cont("failed\n");
-		}
-	}
-}
-
 /*
  * The Multiprocessor Specification 1.4 (1997) example code suggests
  * that there should be a 10ms delay between the BSP asserting INIT
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
@@ -129,10 +129,6 @@ static void xen_noop(void)
 {
 }
 
-static void xen_silent_inquire(int apicid)
-{
-}
-
 static int xen_cpu_present_to_apicid(int cpu)
 {
 	if (cpu_present(cpu))
@@ -173,9 +169,6 @@ static struct apic xen_pv_apic = {
 	.send_IPI_all 			= xen_send_IPI_all,
 	.send_IPI_self 			= xen_send_IPI_self,
 #endif
-	/* .wait_for_init_deassert- used  by AP bootup - smp_callin which we don't use */
-	.inquire_remote_apic		= xen_silent_inquire,
-
 	.read				= xen_apic_read,
 	.write				= xen_apic_write,
 	.eoi_write			= xen_apic_write,

Original file line number	Diff line number	Diff line change
`@@ -129,10 +129,6 @@ static void xen_noop(void)`
`129`	`129`	`{`
`130`	`130`	`}`
`131`	`131`
`132`		`-static void xen_silent_inquire(int apicid)`
`133`		`-{`
`134`		`-}`
`135`		`-`
`136`	`132`	`static int xen_cpu_present_to_apicid(int cpu)`
`137`	`133`	`{`
`138`	`134`	`if (cpu_present(cpu))`
`@@ -173,9 +169,6 @@ static struct apic xen_pv_apic = {`
`173`	`169`	`.send_IPI_all = xen_send_IPI_all,`
`174`	`170`	`.send_IPI_self = xen_send_IPI_self,`
`175`	`171`	`#endif`
`176`		`- /* .wait_for_init_deassert- used by AP bootup - smp_callin which we don't use */`
`177`		`- .inquire_remote_apic = xen_silent_inquire,`
`178`		`-`
`179`	`172`	`.read = xen_apic_read,`
`180`	`173`	`.write = xen_apic_write,`
`181`	`174`	`.eoi_write = xen_apic_write,`