Merge branch 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers into asm-generic

Patches from David Howells <dhowells@redhat.com>:

This is to complete part of the UAPI disintegration for which the
preparatory patches were pulled recently.

Note that there are some fixup patches which are at the base of the
branch aimed at you, plus all arches get the asm-generic branch merged in too.

* 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: (Scripted) Disintegrate include/asm-generic
  UAPI: Fix conditional header installation handling (notably kvm_para.h on m68k)
  c6x: remove c6x signal.h
  UAPI: Split compound conditionals containing __KERNEL__ in Arm64
  UAPI: Fix the guards on various asm/unistd.h files

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 147 insertions, 25 deletions

diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 0ce0dd2332a..269af58497a 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -13,23 +13,14 @@
 #include <asm/pil.h>
 #include <asm/pcr.h>
 #include <asm/nmi.h>
+#include <asm/asi.h>
 #include <asm/spitfire.h>
-#include <asm/perfctr.h>
 
 /* This code is shared between various users of the performance
  * counters.  Users will be oprofile, pseudo-NMI watchdog, and the
  * perf_event support layer.
  */
 
-#define PCR_SUN4U_ENABLE	(PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE)
-#define PCR_N2_ENABLE		(PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE | \
-				 PCR_N2_TOE_OV1 | \
-				 (2 << PCR_N2_SL1_SHIFT) | \
-				 (0xff << PCR_N2_MASK1_SHIFT))
-
-u64 pcr_enable;
-unsigned int picl_shift;
-
 /* Performance counter interrupts run unmasked at PIL level 15.
  * Therefore we can't do things like wakeups and other work
  * that expects IRQ disabling to be adhered to in locking etc.
@@ -60,39 +51,144 @@ void arch_irq_work_raise(void)
 const struct pcr_ops *pcr_ops;
 EXPORT_SYMBOL_GPL(pcr_ops);
 
-static u64 direct_pcr_read(void)
+static u64 direct_pcr_read(unsigned long reg_num)
 {
 	u64 val;
 
-	read_pcr(val);
+	WARN_ON_ONCE(reg_num != 0);
+	__asm__ __volatile__("rd %%pcr, %0" : "=r" (val));
 	return val;
 }
 
-static void direct_pcr_write(u64 val)
+static void direct_pcr_write(unsigned long reg_num, u64 val)
+{
+	WARN_ON_ONCE(reg_num != 0);
+	__asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (val));
+}
+
+static u64 direct_pic_read(unsigned long reg_num)
 {
-	write_pcr(val);
+	u64 val;
+
+	WARN_ON_ONCE(reg_num != 0);
+	__asm__ __volatile__("rd %%pic, %0" : "=r" (val));
+	return val;
+}
+
+static void direct_pic_write(unsigned long reg_num, u64 val)
+{
+	WARN_ON_ONCE(reg_num != 0);
+
+	/* Blackbird errata workaround.  See commentary in
+	 * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt()
+	 * for more information.
+	 */
+	__asm__ __volatile__("ba,pt	%%xcc, 99f\n\t"
+			     " nop\n\t"
+			     ".align	64\n"
+			  "99:wr	%0, 0x0, %%pic\n\t"
+			     "rd	%%pic, %%g0" : : "r" (val));
+}
+
+static u64 direct_picl_value(unsigned int nmi_hz)
+{
+	u32 delta = local_cpu_data().clock_tick / nmi_hz;
+
+	return ((u64)((0 - delta) & 0xffffffff)) << 32;
 }
 
 static const struct pcr_ops direct_pcr_ops = {
-	.read	= direct_pcr_read,
-	.write	= direct_pcr_write,
+	.read_pcr		= direct_pcr_read,
+	.write_pcr		= direct_pcr_write,
+	.read_pic		= direct_pic_read,
+	.write_pic		= direct_pic_write,
+	.nmi_picl_value		= direct_picl_value,
+	.pcr_nmi_enable		= (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE),
+	.pcr_nmi_disable	= PCR_PIC_PRIV,
 };
 
-static void n2_pcr_write(u64 val)
+static void n2_pcr_write(unsigned long reg_num, u64 val)
 {
 	unsigned long ret;
 
+	WARN_ON_ONCE(reg_num != 0);
 	if (val & PCR_N2_HTRACE) {
 		ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
 		if (ret != HV_EOK)
-			write_pcr(val);
+			direct_pcr_write(reg_num, val);
 	} else
-		write_pcr(val);
+		direct_pcr_write(reg_num, val);
+}
+
+static u64 n2_picl_value(unsigned int nmi_hz)
+{
+	u32 delta = local_cpu_data().clock_tick / (nmi_hz << 2);
+
+	return ((u64)((0 - delta) & 0xffffffff)) << 32;
 }
 
 static const struct pcr_ops n2_pcr_ops = {
-	.read	= direct_pcr_read,
-	.write	= n2_pcr_write,
+	.read_pcr		= direct_pcr_read,
+	.write_pcr		= n2_pcr_write,
+	.read_pic		= direct_pic_read,
+	.write_pic		= direct_pic_write,
+	.nmi_picl_value		= n2_picl_value,
+	.pcr_nmi_enable		= (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE |
+				   PCR_N2_TOE_OV1 |
+				   (2 << PCR_N2_SL1_SHIFT) |
+				   (0xff << PCR_N2_MASK1_SHIFT)),
+	.pcr_nmi_disable	= PCR_PIC_PRIV,
+};
+
+static u64 n4_pcr_read(unsigned long reg_num)
+{
+	unsigned long val;
+
+	(void) sun4v_vt_get_perfreg(reg_num, &val);
+
+	return val;
+}
+
+static void n4_pcr_write(unsigned long reg_num, u64 val)
+{
+	(void) sun4v_vt_set_perfreg(reg_num, val);
+}
+
+static u64 n4_pic_read(unsigned long reg_num)
+{
+	unsigned long val;
+
+	__asm__ __volatile__("ldxa [%1] %2, %0"
+			     : "=r" (val)
+			     : "r" (reg_num * 0x8UL), "i" (ASI_PIC));
+
+	return val;
+}
+
+static void n4_pic_write(unsigned long reg_num, u64 val)
+{
+	__asm__ __volatile__("stxa %0, [%1] %2"
+			     : /* no outputs */
+			     : "r" (val), "r" (reg_num * 0x8UL), "i" (ASI_PIC));
+}
+
+static u64 n4_picl_value(unsigned int nmi_hz)
+{
+	u32 delta = local_cpu_data().clock_tick / (nmi_hz << 2);
+
+	return ((u64)((0 - delta) & 0xffffffff));
+}
+
+static const struct pcr_ops n4_pcr_ops = {
+	.read_pcr		= n4_pcr_read,
+	.write_pcr		= n4_pcr_write,
+	.read_pic		= n4_pic_read,
+	.write_pic		= n4_pic_write,
+	.nmi_picl_value		= n4_picl_value,
+	.pcr_nmi_enable		= (PCR_N4_PICNPT | PCR_N4_STRACE |
+				   PCR_N4_UTRACE | PCR_N4_TOE |
+				   (26 << PCR_N4_SL_SHIFT)),
+	.pcr_nmi_disable	= PCR_N4_PICNPT,
 };
 
 static unsigned long perf_hsvc_group;
@@ -115,6 +211,10 @@ static int __init register_perf_hsvc(void)
 			perf_hsvc_group = HV_GRP_KT_CPU;
 			break;
 
+		case SUN4V_CHIP_NIAGARA4:
+			perf_hsvc_group = HV_GRP_VT_CPU;
+			break;
+
 		default:
 			return -ENODEV;
 		}
@@ -139,6 +239,29 @@ static void __init unregister_perf_hsvc(void)
 	sun4v_hvapi_unregister(perf_hsvc_group);
 }
 
+static int __init setup_sun4v_pcr_ops(void)
+{
+	int ret = 0;
+
+	switch (sun4v_chip_type) {
+	case SUN4V_CHIP_NIAGARA1:
+	case SUN4V_CHIP_NIAGARA2:
+	case SUN4V_CHIP_NIAGARA3:
+		pcr_ops = &n2_pcr_ops;
+		break;
+
+	case SUN4V_CHIP_NIAGARA4:
+		pcr_ops = &n4_pcr_ops;
+		break;
+
+	default:
+		ret = -ENODEV;
+		break;
+	}
+
+	return ret;
+}
+
 int __init pcr_arch_init(void)
 {
 	int err = register_perf_hsvc();
@@ -148,15 +271,14 @@ int __init pcr_arch_init(void)
 
 	switch (tlb_type) {
 	case hypervisor:
-		pcr_ops = &n2_pcr_ops;
-		pcr_enable = PCR_N2_ENABLE;
-		picl_shift = 2;
+		err = setup_sun4v_pcr_ops();
+		if (err)
+			goto out_unregister;
 		break;
 
 	case cheetah:
 	case cheetah_plus:
 		pcr_ops = &direct_pcr_ops;
-		pcr_enable = PCR_SUN4U_ENABLE;
 		break;
 
 	case spitfire: