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Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
-rw-r--r--arch/x86/kernel/apic/apic.c155
1 files changed, 74 insertions, 81 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 66fd4b2a37a3..d73ba5a7b623 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -59,6 +59,7 @@
#include <asm/time.h>
#include <asm/smp.h>
#include <asm/mce.h>
+#include <asm/msr.h>
#include <asm/tsc.h>
#include <asm/hypervisor.h>
#include <asm/cpu_device_id.h>
@@ -425,7 +426,7 @@ static int lapic_next_deadline(unsigned long delta,
weak_wrmsr_fence();
tsc = rdtsc();
- wrmsrl(MSR_IA32_TSC_DEADLINE, tsc + (((u64) delta) * TSC_DIVISOR));
+ wrmsrq(MSR_IA32_TSC_DEADLINE, tsc + (((u64) delta) * TSC_DIVISOR));
return 0;
}
@@ -440,7 +441,19 @@ static int lapic_timer_shutdown(struct clock_event_device *evt)
v = apic_read(APIC_LVTT);
v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
apic_write(APIC_LVTT, v);
- apic_write(APIC_TMICT, 0);
+
+ /*
+ * Setting APIC_LVT_MASKED (above) should be enough to tell
+ * the hardware that this timer will never fire. But AMD
+ * erratum 411 and some Intel CPU behavior circa 2024 say
+ * otherwise. Time for belt and suspenders programming: mask
+ * the timer _and_ zero the counter registers:
+ */
+ if (v & APIC_LVT_TIMER_TSCDEADLINE)
+ wrmsrq(MSR_IA32_TSC_DEADLINE, 0);
+ else
+ apic_write(APIC_TMICT, 0);
+
return 0;
}
@@ -497,19 +510,19 @@ static struct clock_event_device lapic_clockevent = {
static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
static const struct x86_cpu_id deadline_match[] __initconst = {
- X86_MATCH_VFM_STEPPINGS(INTEL_HASWELL_X, X86_STEPPINGS(0x2, 0x2), 0x3a), /* EP */
- X86_MATCH_VFM_STEPPINGS(INTEL_HASWELL_X, X86_STEPPINGS(0x4, 0x4), 0x0f), /* EX */
+ X86_MATCH_VFM_STEPS(INTEL_HASWELL_X, 0x2, 0x2, 0x3a), /* EP */
+ X86_MATCH_VFM_STEPS(INTEL_HASWELL_X, 0x4, 0x4, 0x0f), /* EX */
X86_MATCH_VFM(INTEL_BROADWELL_X, 0x0b000020),
- X86_MATCH_VFM_STEPPINGS(INTEL_BROADWELL_D, X86_STEPPINGS(0x2, 0x2), 0x00000011),
- X86_MATCH_VFM_STEPPINGS(INTEL_BROADWELL_D, X86_STEPPINGS(0x3, 0x3), 0x0700000e),
- X86_MATCH_VFM_STEPPINGS(INTEL_BROADWELL_D, X86_STEPPINGS(0x4, 0x4), 0x0f00000c),
- X86_MATCH_VFM_STEPPINGS(INTEL_BROADWELL_D, X86_STEPPINGS(0x5, 0x5), 0x0e000003),
+ X86_MATCH_VFM_STEPS(INTEL_BROADWELL_D, 0x2, 0x2, 0x00000011),
+ X86_MATCH_VFM_STEPS(INTEL_BROADWELL_D, 0x3, 0x3, 0x0700000e),
+ X86_MATCH_VFM_STEPS(INTEL_BROADWELL_D, 0x4, 0x4, 0x0f00000c),
+ X86_MATCH_VFM_STEPS(INTEL_BROADWELL_D, 0x5, 0x5, 0x0e000003),
- X86_MATCH_VFM_STEPPINGS(INTEL_SKYLAKE_X, X86_STEPPINGS(0x3, 0x3), 0x01000136),
- X86_MATCH_VFM_STEPPINGS(INTEL_SKYLAKE_X, X86_STEPPINGS(0x4, 0x4), 0x02000014),
- X86_MATCH_VFM_STEPPINGS(INTEL_SKYLAKE_X, X86_STEPPINGS(0x5, 0xf), 0),
+ X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X, 0x3, 0x3, 0x01000136),
+ X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X, 0x4, 0x4, 0x02000014),
+ X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X, 0x5, 0xf, 0),
X86_MATCH_VFM(INTEL_HASWELL, 0x22),
X86_MATCH_VFM(INTEL_HASWELL_L, 0x20),
@@ -677,7 +690,7 @@ calibrate_by_pmtimer(u32 deltapm, long *delta, long *deltatsc)
return -1;
#endif
- apic_printk(APIC_VERBOSE, "... PM-Timer delta = %u\n", deltapm);
+ apic_pr_verbose("... PM-Timer delta = %u\n", deltapm);
/* Check, if the PM timer is available */
if (!deltapm)
@@ -687,14 +700,14 @@ calibrate_by_pmtimer(u32 deltapm, long *delta, long *deltatsc)
if (deltapm > (pm_100ms - pm_thresh) &&
deltapm < (pm_100ms + pm_thresh)) {
- apic_printk(APIC_VERBOSE, "... PM-Timer result ok\n");
+ apic_pr_verbose("... PM-Timer result ok\n");
return 0;
}
res = (((u64)deltapm) * mult) >> 22;
do_div(res, 1000000);
- pr_warn("APIC calibration not consistent "
- "with PM-Timer: %ldms instead of 100ms\n", (long)res);
+ pr_warn("APIC calibration not consistent with PM-Timer: %ldms instead of 100ms\n",
+ (long)res);
/* Correct the lapic counter value */
res = (((u64)(*delta)) * pm_100ms);
@@ -707,9 +720,8 @@ calibrate_by_pmtimer(u32 deltapm, long *delta, long *deltatsc)
if (boot_cpu_has(X86_FEATURE_TSC)) {
res = (((u64)(*deltatsc)) * pm_100ms);
do_div(res, deltapm);
- apic_printk(APIC_VERBOSE, "TSC delta adjusted to "
- "PM-Timer: %lu (%ld)\n",
- (unsigned long)res, *deltatsc);
+ apic_pr_verbose("TSC delta adjusted to PM-Timer: %lu (%ld)\n",
+ (unsigned long)res, *deltatsc);
*deltatsc = (long)res;
}
@@ -792,8 +804,7 @@ static int __init calibrate_APIC_clock(void)
* in the clockevent structure and return.
*/
if (!lapic_init_clockevent()) {
- apic_printk(APIC_VERBOSE, "lapic timer already calibrated %d\n",
- lapic_timer_period);
+ apic_pr_verbose("lapic timer already calibrated %d\n", lapic_timer_period);
/*
* Direct calibration methods must have an always running
* local APIC timer, no need for broadcast timer.
@@ -802,8 +813,7 @@ static int __init calibrate_APIC_clock(void)
return 0;
}
- apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n"
- "calibrating APIC timer ...\n");
+ apic_pr_verbose("Using local APIC timer interrupts. Calibrating APIC timer ...\n");
/*
* There are platforms w/o global clockevent devices. Instead of
@@ -866,7 +876,7 @@ static int __init calibrate_APIC_clock(void)
/* Build delta t1-t2 as apic timer counts down */
delta = lapic_cal_t1 - lapic_cal_t2;
- apic_printk(APIC_VERBOSE, "... lapic delta = %ld\n", delta);
+ apic_pr_verbose("... lapic delta = %ld\n", delta);
deltatsc = (long)(lapic_cal_tsc2 - lapic_cal_tsc1);
@@ -877,22 +887,19 @@ static int __init calibrate_APIC_clock(void)
lapic_timer_period = (delta * APIC_DIVISOR) / LAPIC_CAL_LOOPS;
lapic_init_clockevent();
- apic_printk(APIC_VERBOSE, "..... delta %ld\n", delta);
- apic_printk(APIC_VERBOSE, "..... mult: %u\n", lapic_clockevent.mult);
- apic_printk(APIC_VERBOSE, "..... calibration result: %u\n",
- lapic_timer_period);
+ apic_pr_verbose("..... delta %ld\n", delta);
+ apic_pr_verbose("..... mult: %u\n", lapic_clockevent.mult);
+ apic_pr_verbose("..... calibration result: %u\n", lapic_timer_period);
if (boot_cpu_has(X86_FEATURE_TSC)) {
- apic_printk(APIC_VERBOSE, "..... CPU clock speed is "
- "%ld.%04ld MHz.\n",
- (deltatsc / LAPIC_CAL_LOOPS) / (1000000 / HZ),
- (deltatsc / LAPIC_CAL_LOOPS) % (1000000 / HZ));
+ apic_pr_verbose("..... CPU clock speed is %ld.%04ld MHz.\n",
+ (deltatsc / LAPIC_CAL_LOOPS) / (1000000 / HZ),
+ (deltatsc / LAPIC_CAL_LOOPS) % (1000000 / HZ));
}
- apic_printk(APIC_VERBOSE, "..... host bus clock speed is "
- "%u.%04u MHz.\n",
- lapic_timer_period / (1000000 / HZ),
- lapic_timer_period % (1000000 / HZ));
+ apic_pr_verbose("..... host bus clock speed is %u.%04u MHz.\n",
+ lapic_timer_period / (1000000 / HZ),
+ lapic_timer_period % (1000000 / HZ));
/*
* Do a sanity check on the APIC calibration result
@@ -911,7 +918,7 @@ static int __init calibrate_APIC_clock(void)
* available.
*/
if (!pm_referenced && global_clock_event) {
- apic_printk(APIC_VERBOSE, "... verify APIC timer\n");
+ apic_pr_verbose("... verify APIC timer\n");
/*
* Setup the apic timer manually
@@ -932,11 +939,11 @@ static int __init calibrate_APIC_clock(void)
/* Jiffies delta */
deltaj = lapic_cal_j2 - lapic_cal_j1;
- apic_printk(APIC_VERBOSE, "... jiffies delta = %lu\n", deltaj);
+ apic_pr_verbose("... jiffies delta = %lu\n", deltaj);
/* Check, if the jiffies result is consistent */
if (deltaj >= LAPIC_CAL_LOOPS-2 && deltaj <= LAPIC_CAL_LOOPS+2)
- apic_printk(APIC_VERBOSE, "... jiffies result ok\n");
+ apic_pr_verbose("... jiffies result ok\n");
else
levt->features |= CLOCK_EVT_FEAT_DUMMY;
}
@@ -1221,9 +1228,8 @@ void __init sync_Arb_IDs(void)
*/
apic_wait_icr_idle();
- apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
- apic_write(APIC_ICR, APIC_DEST_ALLINC |
- APIC_INT_LEVELTRIG | APIC_DM_INIT);
+ apic_pr_debug("Synchronizing Arb IDs.\n");
+ apic_write(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG | APIC_DM_INIT);
}
enum apic_intr_mode_id apic_intr_mode __ro_after_init;
@@ -1366,8 +1372,6 @@ void __init apic_intr_mode_init(void)
x86_64_probe_apic();
- x86_32_install_bigsmp();
-
if (x86_platform.apic_post_init)
x86_platform.apic_post_init();
@@ -1409,10 +1413,10 @@ static void lapic_setup_esr(void)
if (maxlvt > 3)
apic_write(APIC_ESR, 0);
value = apic_read(APIC_ESR);
- if (value != oldvalue)
- apic_printk(APIC_VERBOSE, "ESR value before enabling "
- "vector: 0x%08x after: 0x%08x\n",
- oldvalue, value);
+ if (value != oldvalue) {
+ apic_pr_verbose("ESR value before enabling vector: 0x%08x after: 0x%08x\n",
+ oldvalue, value);
+ }
}
#define APIC_IR_REGS APIC_ISR_NR
@@ -1599,10 +1603,10 @@ static void setup_local_APIC(void)
value = apic_read(APIC_LVT0) & APIC_LVT_MASKED;
if (!cpu && (pic_mode || !value || ioapic_is_disabled)) {
value = APIC_DM_EXTINT;
- apic_printk(APIC_VERBOSE, "enabled ExtINT on CPU#%d\n", cpu);
+ apic_pr_verbose("Enabled ExtINT on CPU#%d\n", cpu);
} else {
value = APIC_DM_EXTINT | APIC_LVT_MASKED;
- apic_printk(APIC_VERBOSE, "masked ExtINT on CPU#%d\n", cpu);
+ apic_pr_verbose("Masked ExtINT on CPU#%d\n", cpu);
}
apic_write(APIC_LVT0, value);
@@ -1669,7 +1673,6 @@ static __init void apic_read_boot_cpu_id(bool x2apic)
boot_cpu_apic_version = GET_APIC_VERSION(apic_read(APIC_LVR));
}
topology_register_boot_apic(boot_cpu_physical_apicid);
- x86_32_probe_bigsmp_early();
}
#ifdef CONFIG_X86_X2APIC
@@ -1692,7 +1695,7 @@ static bool x2apic_hw_locked(void)
x86_arch_cap_msr = x86_read_arch_cap_msr();
if (x86_arch_cap_msr & ARCH_CAP_XAPIC_DISABLE) {
- rdmsrl(MSR_IA32_XAPIC_DISABLE_STATUS, msr);
+ rdmsrq(MSR_IA32_XAPIC_DISABLE_STATUS, msr);
return (msr & LEGACY_XAPIC_DISABLED);
}
return false;
@@ -1705,12 +1708,12 @@ static void __x2apic_disable(void)
if (!boot_cpu_has(X86_FEATURE_APIC))
return;
- rdmsrl(MSR_IA32_APICBASE, msr);
+ rdmsrq(MSR_IA32_APICBASE, msr);
if (!(msr & X2APIC_ENABLE))
return;
/* Disable xapic and x2apic first and then reenable xapic mode */
- wrmsrl(MSR_IA32_APICBASE, msr & ~(X2APIC_ENABLE | XAPIC_ENABLE));
- wrmsrl(MSR_IA32_APICBASE, msr & ~X2APIC_ENABLE);
+ wrmsrq(MSR_IA32_APICBASE, msr & ~(X2APIC_ENABLE | XAPIC_ENABLE));
+ wrmsrq(MSR_IA32_APICBASE, msr & ~X2APIC_ENABLE);
printk_once(KERN_INFO "x2apic disabled\n");
}
@@ -1718,10 +1721,10 @@ static void __x2apic_enable(void)
{
u64 msr;
- rdmsrl(MSR_IA32_APICBASE, msr);
+ rdmsrq(MSR_IA32_APICBASE, msr);
if (msr & X2APIC_ENABLE)
return;
- wrmsrl(MSR_IA32_APICBASE, msr | X2APIC_ENABLE);
+ wrmsrq(MSR_IA32_APICBASE, msr | X2APIC_ENABLE);
printk_once(KERN_INFO "x2apic enabled\n");
}
@@ -1775,12 +1778,9 @@ static __init void apic_set_fixmap(bool read_apic);
static __init void x2apic_disable(void)
{
- u32 x2apic_id, state = x2apic_state;
-
- x2apic_mode = 0;
- x2apic_state = X2APIC_DISABLED;
+ u32 x2apic_id;
- if (state != X2APIC_ON)
+ if (x2apic_state < X2APIC_ON)
return;
x2apic_id = read_apic_id();
@@ -1793,6 +1793,10 @@ static __init void x2apic_disable(void)
}
__x2apic_disable();
+
+ x2apic_mode = 0;
+ x2apic_state = X2APIC_DISABLED;
+
/*
* Don't reread the APIC ID as it was already done from
* check_x2apic() and the APIC driver still is a x2APIC variant,
@@ -2008,8 +2012,8 @@ static bool __init detect_init_APIC(void)
case X86_VENDOR_HYGON:
break;
case X86_VENDOR_INTEL:
- if (boot_cpu_data.x86 == 6 || boot_cpu_data.x86 == 15 ||
- (boot_cpu_data.x86 == 5 && boot_cpu_has(X86_FEATURE_APIC)))
+ if ((boot_cpu_data.x86 == 5 && boot_cpu_has(X86_FEATURE_APIC)) ||
+ boot_cpu_data.x86_vfm >= INTEL_PENTIUM_PRO)
break;
goto no_apic;
default:
@@ -2066,8 +2070,7 @@ static __init void apic_set_fixmap(bool read_apic)
{
set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
apic_mmio_base = APIC_BASE;
- apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
- apic_mmio_base, mp_lapic_addr);
+ apic_pr_verbose("Mapped APIC to %16lx (%16lx)\n", apic_mmio_base, mp_lapic_addr);
if (read_apic)
apic_read_boot_cpu_id(false);
}
@@ -2170,18 +2173,17 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_error_interrupt)
apic_eoi();
atomic_inc(&irq_err_count);
- apic_printk(APIC_DEBUG, KERN_DEBUG "APIC error on CPU%d: %02x",
- smp_processor_id(), v);
+ apic_pr_debug("APIC error on CPU%d: %02x", smp_processor_id(), v);
v &= 0xff;
while (v) {
if (v & 0x1)
- apic_printk(APIC_DEBUG, KERN_CONT " : %s", error_interrupt_reason[i]);
+ apic_pr_debug_cont(" : %s", error_interrupt_reason[i]);
i++;
v >>= 1;
}
- apic_printk(APIC_DEBUG, KERN_CONT "\n");
+ apic_pr_debug_cont("\n");
trace_error_apic_exit(ERROR_APIC_VECTOR);
}
@@ -2201,8 +2203,7 @@ static void __init connect_bsp_APIC(void)
* PIC mode, enable APIC mode in the IMCR, i.e. connect BSP's
* local APIC to INT and NMI lines.
*/
- apic_printk(APIC_VERBOSE, "leaving PIC mode, "
- "enabling APIC mode.\n");
+ apic_pr_verbose("Leaving PIC mode, enabling APIC mode.\n");
imcr_pic_to_apic();
}
#endif
@@ -2227,8 +2228,7 @@ void disconnect_bsp_APIC(int virt_wire_setup)
* IPIs, won't work beyond this point! The only exception are
* INIT IPIs.
*/
- apic_printk(APIC_VERBOSE, "disabling APIC mode, "
- "entering PIC mode.\n");
+ apic_pr_verbose("Disabling APIC mode, entering PIC mode.\n");
imcr_apic_to_pic();
return;
}
@@ -2580,19 +2580,12 @@ int apic_is_clustered_box(void)
/*
* APIC command line parameters
*/
-static int __init setup_disableapic(char *arg)
+static int __init setup_nolapic(char *arg)
{
apic_is_disabled = true;
setup_clear_cpu_cap(X86_FEATURE_APIC);
return 0;
}
-early_param("disableapic", setup_disableapic);
-
-/* same as disableapic, for compatibility */
-static int __init setup_nolapic(char *arg)
-{
- return setup_disableapic(arg);
-}
early_param("nolapic", setup_nolapic);
static int __init parse_lapic_timer_c2_ok(char *arg)
generated by cgit (git 2.34.1) at 2025-07-27 01:29:51 +0000