- Detect a broken EL2 virtual timer in the bcm2712 SoC boards (RPi5) and

fallback to the physical one instead
 
 - Fix a build error with ARM rpc_defconfig and function tracer enabled
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Merge tag 'timers_urgent_for_v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fixes from Borislav Petkov:

 - Detect a broken EL2 virtual timer in the bcm2712 SoC boards (RPi5)
   and fallback to the physical one instead

 - Fix a build error with ARM rpc_defconfig and function tracer enabled

* tag 'timers_urgent_for_v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/arm_arch_timer: Workaround bcm2712 broken EL2 virtual timer
  tick: Include ktime.h and jiffies.h in linux/tick.h

drivers/clocksource/arm_arch_timer.c

@@ -1090,6 +1090,27 @@ static int __init arch_timer_common_init(void)
 	return arch_timer_arch_init();
 }
 
+static bool __init has_broken_el2_vtimer(void)
+{
+	/*
+	 * SoCs described here have been found to be broken, though no
+	 * explanation has been volunteered by the vendor. Let the user know
+	 * we're papering over the vendor's lack of communication.
+	 */
+	static const char * const broken_el2_vtimer[] __initconst = {
+		"brcm,bcm2712",
+		NULL
+	};
+
+	if (of_machine_compatible_match(broken_el2_vtimer)) {
+		add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK);
+		pr_warn_once(HW_ERR "Known broken EL2 virtual timer, ignoring it\n");
+		return true;
+	}
+
+	return false;
+}
+
 /**
  * arch_timer_select_ppi() - Select suitable PPI for the current system.
  *
@@ -1115,7 +1136,8 @@ static int __init arch_timer_common_init(void)
 static enum arch_timer_ppi_nr __init arch_timer_select_ppi(void)
 {
 	if (is_kernel_in_hyp_mode()) {
-		if (arch_timer_ppi[ARCH_TIMER_HYP_VIRT_PPI])
+		if (arch_timer_ppi[ARCH_TIMER_HYP_VIRT_PPI] &&
+		    !has_broken_el2_vtimer())
 			return ARCH_TIMER_HYP_VIRT_PPI;
 
 		pr_warn_once(FW_BUG "VHE-capable CPU without EL2 virtual timer interrupt\n");

include/linux/tick.h

@@ -7,6 +7,8 @@
 
 #include <linux/clockchips.h>
 #include <linux/irqflags.h>
+#include <linux/jiffies.h>
+#include <linux/ktime.h>
 #include <linux/percpu.h>
 #include <linux/context_tracking_state.h>
 #include <linux/cpumask.h>