x86, apic: Replace trampoline physical addresses with defaults

The trampoline_phys_{high,low} members of struct apic are always
initialized to DEFAULT_TRAMPOLINE_PHYS_HIGH and TRAMPOLINE_PHYS_LOW,
respectively.  Hardwire the constants and remove the unneeded members.

Signed-off-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1407302348330.17503@chino.kir.corp.google.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

10 files changed, 8 insertions, 33 deletions

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 067c2f83e329..2201c262b00c 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -335,9 +335,6 @@ struct apic {
         /* wakeup_secondary_cpu */
         int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
 
-        int trampoline_phys_low;
-        int trampoline_phys_high;
-
         bool wait_for_init_deassert;
         void (*smp_callin_clear_local_apic)(void);
         void (*inquire_remote_apic)(int apicid);
@@ -480,10 +477,10 @@ static inline unsigned default_get_apic_id(unsigned long x)
 }
 
 /*
- * Warm reset vector default position:
+ * Warm reset vector position:
  */
-#define DEFAULT_TRAMPOLINE_PHYS_LOW             0x467
-#define DEFAULT_TRAMPOLINE_PHYS_HIGH            0x469
+#define TRAMPOLINE_PHYS_LOW             0x467
+#define TRAMPOLINE_PHYS_HIGH            0x469
 
 #ifdef CONFIG_X86_64
 extern void apic_send_IPI_self(int vector);
diff --git a/arch/x86/include/asm/smpboot_hooks.h b/arch/x86/include/asm/smpboot_hooks.h
index 49adfd7bb4a4..0da7409f0bec 100644
--- a/arch/x86/include/asm/smpboot_hooks.h
+++ b/arch/x86/include/asm/smpboot_hooks.h
@@ -17,11 +17,11 @@ static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
         spin_unlock_irqrestore(&rtc_lock, flags);
         local_flush_tlb();
         pr_debug("1.\n");
-        *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) =
-                                                                 start_eip >> 4;
+        *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)) =
+                                                        start_eip >> 4;
         pr_debug("2.\n");
-        *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_low)) =
-                                                         start_eip & 0xf;
+        *((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) =
+                                                        start_eip & 0xf;
         pr_debug("3.\n");
 }
 
@@ -42,7 +42,7 @@ static inline void smpboot_restore_warm_reset_vector(void)
         CMOS_WRITE(0, 0xf);
         spin_unlock_irqrestore(&rtc_lock, flags);
 
-        *((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0;
+        *((volatile u32 *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) = 0;
 }
 
 static inline void __init smpboot_setup_io_apic(void)
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 7c1b29479513..7d56b65f3ddf 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -196,8 +196,6 @@ static struct apic apic_flat =  {
         .send_IPI_all                   = flat_send_IPI_all,
         .send_IPI_self                  = apic_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = default_inquire_remote_apic,
@@ -312,8 +310,6 @@ static struct apic apic_physflat =  {
         .send_IPI_all                   = physflat_send_IPI_all,
         .send_IPI_self                  = apic_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = default_inquire_remote_apic,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 8c7c98249c20..c638efa6ad67 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -168,10 +168,6 @@ struct apic apic_noop = {
 
         .wakeup_secondary_cpu           = noop_wakeup_secondary_cpu,
 
-        /* should be safe */
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = NULL,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index a5b45df8bc88..c32f8827e3a4 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -246,8 +246,6 @@ static const struct apic apic_numachip __refconst = {
         .send_IPI_self                  = numachip_send_IPI_self,
 
         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = NULL, /* REMRD not supported */
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index e4840aa7a255..74ffd3eb681e 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -196,9 +196,6 @@ static struct apic apic_bigsmp = {
         .send_IPI_all                   = bigsmp_send_IPI_all,
         .send_IPI_self                  = default_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
         .wait_for_init_deassert         = true,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = default_inquire_remote_apic,
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index cceb352c968c..64248c7149e3 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -116,9 +116,6 @@ static struct apic apic_default = {
         .send_IPI_all                   = default_send_IPI_all,
         .send_IPI_self                  = default_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
         .wait_for_init_deassert         = true,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = default_inquire_remote_apic,
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index e66766bf1641..8b3200cc57e3 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -277,8 +277,6 @@ static struct apic apic_x2apic_cluster = {
         .send_IPI_all                   = x2apic_send_IPI_all,
         .send_IPI_self                  = x2apic_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = NULL,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index 6d600ebf6c12..14c189151910 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -131,8 +131,6 @@ static struct apic apic_x2apic_phys = {
         .send_IPI_all                   = x2apic_send_IPI_all,
         .send_IPI_self                  = x2apic_send_IPI_self,
 
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = NULL,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 293b41df54ef..58f098880058 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -394,8 +394,6 @@ static struct apic __refdata apic_x2apic_uv_x = {
         .send_IPI_self                  = uv_send_IPI_self,
 
         .wakeup_secondary_cpu           = uv_wakeup_secondary,
-        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
-        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
         .wait_for_init_deassert         = false,
         .smp_callin_clear_local_apic    = NULL,
         .inquire_remote_apic            = NULL,