Merge branch 'for-paulus' of git://kernel/home/michael/src/work/

arch/powerpc/Makefile

@@ -12,9 +12,6 @@
 # Rewritten by Cort Dougan and Paul Mackerras
 #
 
-# This must match PAGE_OFFSET in include/asm-powerpc/page.h.
-KERNELLOAD	:= $(CONFIG_KERNEL_START)
-
 HAS_BIARCH	:= $(call cc-option-yn, -m32)
 
 ifeq ($(CONFIG_PPC64),y)
@@ -59,7 +56,7 @@ override LD	+= -m elf$(SZ)ppc
 override CC	+= -m$(SZ)
 endif
 
-LDFLAGS_vmlinux	:= -Ttext $(KERNELLOAD) -Bstatic -e $(KERNELLOAD)
+LDFLAGS_vmlinux	:= -Bstatic
 
 # The -Iarch/$(ARCH)/include is temporary while we are merging
 CPPFLAGS	+= -Iarch/$(ARCH) -Iarch/$(ARCH)/include

arch/powerpc/kernel/head_64.S

@@ -1914,24 +1914,6 @@ _GLOBAL(hmt_start_secondary)
 	blr
 #endif
 
-#if defined(CONFIG_KEXEC) || defined(CONFIG_SMP)
-_GLOBAL(smp_release_cpus)
-	/* All secondary cpus are spinning on a common
-	 * spinloop, release them all now so they can start
-	 * to spin on their individual paca spinloops.
-	 * For non SMP kernels, the secondary cpus never
-	 * get out of the common spinloop.
-	 * XXX This does nothing useful on iSeries, secondaries are
-	 * already waiting on their paca.
-	 */
-	li	r3,1
-	LOADADDR(r5,__secondary_hold_spinloop)
-	std	r3,0(r5)
-	sync
-	blr
-#endif /* CONFIG_SMP */
-
-
 /*
  * We put a few things here that have to be page-aligned.
  * This stuff goes at the beginning of the bss, which is page-aligned.

arch/powerpc/kernel/process.c

@@ -48,8 +48,8 @@
 #include <asm/prom.h>
 #ifdef CONFIG_PPC64
 #include <asm/firmware.h>
-#include <asm/plpar_wrappers.h>
 #include <asm/time.h>
+#include <asm/machdep.h>
 #endif
 
 extern unsigned long _get_SP(void);
@@ -201,27 +201,15 @@ int dump_spe(struct pt_regs *regs, elf_vrregset_t *evrregs)
 }
 #endif /* CONFIG_SPE */
 
-static void set_dabr_spr(unsigned long val)
-{
-	mtspr(SPRN_DABR, val);
-}
-
 int set_dabr(unsigned long dabr)
 {
-	int ret = 0;
-
 #ifdef CONFIG_PPC64
-	if (firmware_has_feature(FW_FEATURE_XDABR)) {
-		/* We want to catch accesses from kernel and userspace */
-		unsigned long flags = H_DABRX_KERNEL|H_DABRX_USER;
-		ret = plpar_set_xdabr(dabr, flags);
-	} else if (firmware_has_feature(FW_FEATURE_DABR)) {
-		ret = plpar_set_dabr(dabr);
-	} else
+	if (ppc_md.set_dabr)
+		return ppc_md.set_dabr(dabr);
 #endif
-		set_dabr_spr(dabr);
 
-	return ret;
+	mtspr(SPRN_DABR, dabr);
+	return 0;
 }
 
 #ifdef CONFIG_PPC64

arch/powerpc/kernel/prom.c

@@ -1285,7 +1285,7 @@ static int __init early_init_dt_scan_memory(unsigned long node,
 
 	endp = reg + (l / sizeof(cell_t));
 
-	DBG("memory scan node %s ..., reg size %ld, data: %x %x %x %x, ...\n",
+	DBG("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
 	    uname, l, reg[0], reg[1], reg[2], reg[3]);
 
 	while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {

arch/powerpc/kernel/setup_64.c

@@ -103,8 +103,6 @@ extern void htab_initialize(void);
 extern void early_init_devtree(void *flat_dt);
 extern void unflatten_device_tree(void);
 
-extern void smp_release_cpus(void);
-
 int have_of = 1;
 int boot_cpuid = 0;
 int boot_cpuid_phys = 0;
@@ -400,6 +398,27 @@ void __init early_setup(unsigned long dt_ptr)
 }
 
 
+#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
+void smp_release_cpus(void)
+{
+	extern unsigned long __secondary_hold_spinloop;
+
+	DBG(" -> smp_release_cpus()\n");
+
+	/* All secondary cpus are spinning on a common spinloop, release them
+	 * all now so they can start to spin on their individual paca
+	 * spinloops. For non SMP kernels, the secondary cpus never get out
+	 * of the common spinloop.
+	 * This is useless but harmless on iSeries, secondaries are already
+	 * waiting on their paca spinloops. */
+
+	__secondary_hold_spinloop = 1;
+	mb();
+
+	DBG(" <- smp_release_cpus()\n");
+}
+#endif /* CONFIG_SMP || CONFIG_KEXEC */
+
 /*
  * Initialize some remaining members of the ppc64_caches and systemcfg structures
  * (at least until we get rid of them completely). This is mostly some

arch/powerpc/kernel/vmlinux.lds.S

 #include <linux/config.h>
-#ifdef CONFIG_PPC64
 #include <asm/page.h>
-#else
-#define PAGE_SIZE	4096
-#endif
 #include <asm-generic/vmlinux.lds.h>
 
+ENTRY(_stext)
+
 #ifdef CONFIG_PPC64
 OUTPUT_ARCH(powerpc:common64)
 jiffies = jiffies_64;
@@ -21,6 +19,7 @@ SECTIONS
     *(.exit.data)
   }
 
+  . = KERNELBASE;
 
   /* Read-only sections, merged into text segment: */
 #ifdef CONFIG_PPC32

arch/powerpc/platforms/pseries/iommu.c

@@ -42,13 +42,14 @@
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 #include <asm/abs_addr.h>
-#include <asm/plpar_wrappers.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/systemcfg.h>
 #include <asm/firmware.h>
 #include <asm/tce.h>
 #include <asm/ppc-pci.h>
 
+#include "plpar_wrappers.h"
+
 #define DBG(fmt...)
 
 extern int is_python(struct device_node *);

arch/powerpc/platforms/pseries/lpar.c

@@ -38,7 +38,8 @@
 #include <asm/prom.h>
 #include <asm/abs_addr.h>
 #include <asm/cputable.h>
-#include <asm/plpar_wrappers.h>
+
+#include "plpar_wrappers.h"
 
 #ifdef DEBUG
 #define DBG(fmt...) udbg_printf(fmt)
@@ -260,22 +261,18 @@ int find_udbg_vterm(void)
 void vpa_init(int cpu)
 {
 	int hwcpu = get_hard_smp_processor_id(cpu);
-	unsigned long vpa = (unsigned long)&(paca[cpu].lppaca);
+	unsigned long vpa = __pa(&paca[cpu].lppaca);
 	long ret;
-	unsigned long flags;
-
-	/* Register the Virtual Processor Area (VPA) */
-	flags = 1UL << (63 - 18);
 
 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
 		paca[cpu].lppaca.vmxregs_in_use = 1;
 
-	ret = register_vpa(flags, hwcpu, __pa(vpa));
+	ret = register_vpa(hwcpu, vpa);
 
 	if (ret)
 		printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
 				"cpu %d (hw %d) of area %lx returns %ld\n",
-				cpu, hwcpu, __pa(vpa), ret);
+				cpu, hwcpu, vpa, ret);
 }
 
 long pSeries_lpar_hpte_insert(unsigned long hpte_group,

include/asm-ppc64/plpar_wrappers.h → arch/powerpc/platforms/pseries/plpar_wrappers.h

-#ifndef _PPC64_PLPAR_WRAPPERS_H
-#define _PPC64_PLPAR_WRAPPERS_H
+#ifndef _PSERIES_PLPAR_WRAPPERS_H
+#define _PSERIES_PLPAR_WRAPPERS_H
 
 #include <asm/hvcall.h>
 
 static inline long poll_pending(void)
 {
 	unsigned long dummy;
-	return plpar_hcall(H_POLL_PENDING, 0, 0, 0, 0,
-			   &dummy, &dummy, &dummy);
+	return plpar_hcall(H_POLL_PENDING, 0, 0, 0, 0, &dummy, &dummy, &dummy);
 }
 
 static inline long prod_processor(void)
 {
 	plpar_hcall_norets(H_PROD);
-	return(0); 
+	return 0;
 }
 
 static inline long cede_processor(void)
 {
 	plpar_hcall_norets(H_CEDE);
-	return(0); 
+	return 0;
 }
 
-static inline long register_vpa(unsigned long flags, unsigned long proc,
+static inline long vpa_call(unsigned long flags, unsigned long cpu,
 		unsigned long vpa)
 {
-	return plpar_hcall_norets(H_REGISTER_VPA, flags, proc, vpa);
+	/* flags are in bits 16-18 (counting from most significant bit) */
+	flags = flags << (63 - 18);
+
+	return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
+}
+
+static inline long unregister_vpa(unsigned long cpu, unsigned long vpa)
+{
+	return vpa_call(0x5, cpu, vpa);
+}
+
+static inline long register_vpa(unsigned long cpu, unsigned long vpa)
+{
+	return vpa_call(0x1, cpu, vpa);
 }
 
-void vpa_init(int cpu);
+extern void vpa_init(int cpu);
 
-static inline long plpar_pte_remove(unsigned long flags,
-				    unsigned long ptex,
-				    unsigned long avpn,
-				    unsigned long *old_pteh_ret,
+static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
+		unsigned long avpn, unsigned long *old_pteh_ret,
 		unsigned long *old_ptel_ret)
 {
 	unsigned long dummy;
-	return plpar_hcall(H_REMOVE, flags, ptex, avpn, 0,
-			   old_pteh_ret, old_ptel_ret, &dummy);
+	return plpar_hcall(H_REMOVE, flags, ptex, avpn, 0, old_pteh_ret,
+			old_ptel_ret, &dummy);
 }
 
-static inline long plpar_pte_read(unsigned long flags,
-				  unsigned long ptex,
+static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
 		unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 {
 	unsigned long dummy;
-	return plpar_hcall(H_READ, flags, ptex, 0, 0,
-			   old_pteh_ret, old_ptel_ret, &dummy);
+	return plpar_hcall(H_READ, flags, ptex, 0, 0, old_pteh_ret,
+			old_ptel_ret, &dummy);
 }
 
-static inline long plpar_pte_protect(unsigned long flags,
-				     unsigned long ptex,
+static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
 		unsigned long avpn)
 {
 	return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 }
 
-static inline long plpar_tce_get(unsigned long liobn,
-				 unsigned long ioba,
+static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
 		unsigned long *tce_ret)
 {
 	unsigned long dummy;
-	return plpar_hcall(H_GET_TCE, liobn, ioba, 0, 0,
-			   tce_ret, &dummy, &dummy);
+	return plpar_hcall(H_GET_TCE, liobn, ioba, 0, 0, tce_ret, &dummy,
+			&dummy);
 }
 
-static inline long plpar_tce_put(unsigned long liobn,
-				 unsigned long ioba,
+static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
 		unsigned long tceval)
 {
 	return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
 }
 
 static inline long plpar_tce_put_indirect(unsigned long liobn,
-					  unsigned long ioba,
-					  unsigned long page,
-					  unsigned long count)
+		unsigned long ioba, unsigned long page, unsigned long count)
 {
 	return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
 }
 
-static inline long plpar_tce_stuff(unsigned long liobn,
-				   unsigned long ioba,
-				   unsigned long tceval,
-				   unsigned long count)
+static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
+		unsigned long tceval, unsigned long count)
 {
 	return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
 }
 
 static inline long plpar_get_term_char(unsigned long termno,
-				       unsigned long *len_ret,
-				       char *buf_ret)
+		unsigned long *len_ret, char *buf_ret)
 {
-	unsigned long *lbuf = (unsigned long *)buf_ret;  /* ToDo: alignment? */
-	return plpar_hcall(H_GET_TERM_CHAR, termno, 0, 0, 0,
-			   len_ret, lbuf+0, lbuf+1);
+	unsigned long *lbuf = (unsigned long *)buf_ret;	/* TODO: alignment? */
+	return plpar_hcall(H_GET_TERM_CHAR, termno, 0, 0, 0, len_ret,
+			lbuf + 0, lbuf + 1);
 }
 
-static inline long plpar_put_term_char(unsigned long termno,
-				       unsigned long len,
+static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
 		const char *buffer)
 {
-	unsigned long *lbuf = (unsigned long *)buffer;  /* ToDo: alignment? */
+	unsigned long *lbuf = (unsigned long *)buffer;	/* TODO: alignment? */
 	return plpar_hcall_norets(H_PUT_TERM_CHAR, termno, len, lbuf[0],
 			lbuf[1]);
 }
@@ -117,4 +117,4 @@ static inline long plpar_set_dabr(unsigned long val)
 	return plpar_hcall_norets(H_SET_DABR, val);
 }
 
-#endif /* _PPC64_PLPAR_WRAPPERS_H */
+#endif /* _PSERIES_PLPAR_WRAPPERS_H */

arch/powerpc/platforms/pseries/setup.c

@@ -58,7 +58,6 @@
 #include <asm/irq.h>
 #include <asm/time.h>
 #include <asm/nvram.h>
-#include <asm/plpar_wrappers.h>
 #include "xics.h"
 #include <asm/firmware.h>
 #include <asm/pmc.h>
@@ -67,6 +66,8 @@
 #include <asm/i8259.h>
 #include <asm/udbg.h>
 
+#include "plpar_wrappers.h"
+
 #ifdef DEBUG
 #define DBG(fmt...) udbg_printf(fmt)
 #else
@@ -350,6 +351,16 @@ static void pSeries_mach_cpu_die(void)
 	for(;;);
 }
 
+static int pseries_set_dabr(unsigned long dabr)
+{
+	if (firmware_has_feature(FW_FEATURE_XDABR)) {
+		/* We want to catch accesses from kernel and userspace */
+		return plpar_set_xdabr(dabr, H_DABRX_KERNEL | H_DABRX_USER);
+	}
+
+	return plpar_set_dabr(dabr);
+}
+
 
 /*
  * Early initialization.  Relocation is on but do not reference unbolted pages
@@ -385,6 +396,8 @@ static void __init pSeries_init_early(void)
 		DBG("Hello World !\n");
 	}
 
+	if (firmware_has_feature(FW_FEATURE_XDABR | FW_FEATURE_DABR))
+		ppc_md.set_dabr = pseries_set_dabr;
 
 	iommu_init_early_pSeries();
 

arch/powerpc/platforms/pseries/smp.c

@@ -44,10 +44,11 @@
 #include <asm/firmware.h>
 #include <asm/system.h>
 #include <asm/rtas.h>
-#include <asm/plpar_wrappers.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/mpic.h>
 
+#include "plpar_wrappers.h"
+
 #ifdef DEBUG
 #define DBG(fmt...) udbg_printf(fmt)
 #else

arch/ppc/kernel/machine_kexec.c

@@ -32,7 +32,7 @@ const extern unsigned int relocate_new_kernel_size;
  * Provide a dummy crash_notes definition while crash dump arrives to ppc.
  * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
  */
-void *crash_notes = NULL;
+note_buf_t crash_notes[NR_CPUS];
 
 void machine_shutdown(void)
 {

arch/ppc64/kernel/head.S

@@ -1914,24 +1914,6 @@ _GLOBAL(hmt_start_secondary)
 	blr
 #endif
 
-#if defined(CONFIG_KEXEC) || defined(CONFIG_SMP)
-_GLOBAL(smp_release_cpus)
-	/* All secondary cpus are spinning on a common
-	 * spinloop, release them all now so they can start
-	 * to spin on their individual paca spinloops.
-	 * For non SMP kernels, the secondary cpus never
-	 * get out of the common spinloop.
-	 * XXX This does nothing useful on iSeries, secondaries are
-	 * already waiting on their paca.
-	 */
-	li	r3,1
-	LOADADDR(r5,__secondary_hold_spinloop)
-	std	r3,0(r5)
-	sync
-	blr
-#endif /* CONFIG_SMP */
-
-
 /*
  * We put a few things here that have to be page-aligned.
  * This stuff goes at the beginning of the bss, which is page-aligned.

arch/ppc64/kernel/machine_kexec.c

@@ -244,7 +244,6 @@ static void kexec_prepare_cpus(void)
 
 static void kexec_prepare_cpus(void)
 {
-	extern void smp_release_cpus(void);
 	/*
 	 * move the secondarys to us so that we can copy
 	 * the new kernel 0-0x100 safely

include/asm-powerpc/elf.h

@@ -178,18 +178,22 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF_NVRREG32];
 static inline void ppc_elf_core_copy_regs(elf_gregset_t elf_regs,
 					    struct pt_regs *regs)
 {
-	int i;
-	int gprs = sizeof(struct pt_regs)/sizeof(ELF_GREG_TYPE);
+	int i, nregs;
 
-	if (gprs > ELF_NGREG)
-		gprs = ELF_NGREG;
+	memset((void *)elf_regs, 0, sizeof(elf_gregset_t));
 
-	for (i=0; i < gprs; i++)
-		elf_regs[i] = (elf_greg_t)((ELF_GREG_TYPE *)regs)[i];
-
-	memset((char *)(elf_regs) + sizeof(struct pt_regs), 0,  	\
-	       sizeof(elf_gregset_t) - sizeof(struct pt_regs));
+	/* Our registers are always unsigned longs, whether we're a 32 bit
+	 * process or 64 bit, on either a 64 bit or 32 bit kernel.
+	 * Don't use ELF_GREG_TYPE here. */
+	nregs = sizeof(struct pt_regs) / sizeof(unsigned long);
+	if (nregs > ELF_NGREG)
+		nregs = ELF_NGREG;
 
+	for (i = 0; i < nregs; i++) {
+		/* This will correctly truncate 64 bit registers to 32 bits
+		 * for a 32 bit process on a 64 bit kernel. */
+		elf_regs[i] = (elf_greg_t)((ELF_GREG_TYPE *)regs)[i];
+	}
 }
 #define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs);
 

include/asm-powerpc/machdep.h

@@ -80,6 +80,7 @@ struct machdep_calls {
 	void		(*iommu_dev_setup)(struct pci_dev *dev);
 	void		(*iommu_bus_setup)(struct pci_bus *bus);
 	void		(*irq_bus_setup)(struct pci_bus *bus);
+	int		(*set_dabr)(unsigned long dabr);
 #endif
 
 	int		(*probe)(int platform);

include/asm-ppc/kexec.h

-#ifndef _PPC_KEXEC_H
-#define _PPC_KEXEC_H
-
-#ifdef CONFIG_KEXEC
-
-/*
- * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
- * I.e. Maximum page that is mapped directly into kernel memory,
- * and kmap is not required.
- *
- * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
- * calculation for the amount of memory directly mappable into the
- * kernel memory space.
- */
-
-/* Maximum physical address we can use pages from */
-#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
-/* Maximum address we can reach in physical address mode */
-#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
-/* Maximum address we can use for the control code buffer */
-#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
-
-#define KEXEC_CONTROL_CODE_SIZE	4096
-
-/* The native architecture */
-#define KEXEC_ARCH KEXEC_ARCH_PPC
-
-#ifndef __ASSEMBLY__
-
-extern void *crash_notes;
-
-struct kimage;
-
-extern void machine_kexec_simple(struct kimage *image);
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* CONFIG_KEXEC */
-
-#endif /* _PPC_KEXEC_H */