Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into for-2.6.21

6 files changed, 95 insertions, 41 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5f80f0b828f..0b6325a77c7 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -492,6 +492,7 @@ config PPC_MAPLE
 	select PPC_NATIVE
 	select PPC_RTAS
 	select MMIO_NVRAM
+	select ATA_NONSTANDARD if ATA
 	default n
 	help
           This option enables support for the Maple 970FX Evaluation Board.
@@ -533,12 +534,15 @@ config PPC_IBM_CELL_BLADE
 	select UDBG_RTAS_CONSOLE
 
 config PPC_PS3
-	bool "Sony PS3"
+	bool "Sony PS3 (incomplete)"
 	depends on PPC_MULTIPLATFORM && PPC64
 	select PPC_CELL
 	help
 	  This option enables support for the Sony PS3 game console
 	  and other platforms using the PS3 hypervisor.
+	  Support for this platform is not yet complete, so
+	  enabling this will not result in a bootable kernel on a
+	  PS3 system.
 
 config PPC_CELLEB
 	bool "Toshiba's Cell Reference Set 'Celleb' Architecture"
@@ -1202,7 +1206,7 @@ source "arch/powerpc/oprofile/Kconfig"
 
 config KPROBES
 	bool "Kprobes (EXPERIMENTAL)"
-	depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES
+	depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
 	help
 	  Kprobes allows you to trap at almost any kernel address and
 	  execute a callback function.  register_kprobe() establishes
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 4657563f881..dd2886f97e9 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -46,8 +46,8 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
 	if ((unsigned long)p->addr & 0x03) {
 		printk("Attempt to register kprobe at an unaligned address\n");
 		ret = -EINVAL;
-	} else if (IS_MTMSRD(insn) || IS_RFID(insn)) {
-		printk("Cannot register a kprobe on rfid or mtmsrd\n");
+	} else if (IS_MTMSRD(insn) || IS_RFID(insn) || IS_RFI(insn)) {
+		printk("Cannot register a kprobe on rfi/rfid or mtmsr[d]\n");
 		ret = -EINVAL;
 	}
 
@@ -483,8 +483,12 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	memcpy(&kcb->jprobe_saved_regs, regs, sizeof(struct pt_regs));
 
 	/* setup return addr to the jprobe handler routine */
+#ifdef CONFIG_PPC64
 	regs->nip = (unsigned long)(((func_descr_t *)jp->entry)->entry);
 	regs->gpr[2] = (unsigned long)(((func_descr_t *)jp->entry)->toc);
+#else
+	regs->nip = (unsigned long)jp->entry;
+#endif
 
 	return 1;
 }
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index b6d08738180..6828df4afd9 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -1429,7 +1429,7 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
 
 	for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
 		bus = pci_bus_b(ln);
-		if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
+		if (in_bus >= bus->number && in_bus <= bus->subordinate)
 			break;
 		bus = NULL;
 	}
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 6915b91868b..dcc6f159fd9 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -535,34 +535,40 @@ static void emulate_single_step(struct pt_regs *regs)
 	}
 }
 
-static void parse_fpe(struct pt_regs *regs)
+static inline int __parse_fpscr(unsigned long fpscr)
 {
-	int code = 0;
-	unsigned long fpscr;
-
-	flush_fp_to_thread(current);
-
-	fpscr = current->thread.fpscr.val;
+	int ret = 0;
 
 	/* Invalid operation */
 	if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX))
-		code = FPE_FLTINV;
+		ret = FPE_FLTINV;
 
 	/* Overflow */
 	else if ((fpscr & FPSCR_OE) && (fpscr & FPSCR_OX))
-		code = FPE_FLTOVF;
+		ret = FPE_FLTOVF;
 
 	/* Underflow */
 	else if ((fpscr & FPSCR_UE) && (fpscr & FPSCR_UX))
-		code = FPE_FLTUND;
+		ret = FPE_FLTUND;
 
 	/* Divide by zero */
 	else if ((fpscr & FPSCR_ZE) && (fpscr & FPSCR_ZX))
-		code = FPE_FLTDIV;
+		ret = FPE_FLTDIV;
 
 	/* Inexact result */
 	else if ((fpscr & FPSCR_XE) && (fpscr & FPSCR_XX))
-		code = FPE_FLTRES;
+		ret = FPE_FLTRES;
+
+	return ret;
+}
+
+static void parse_fpe(struct pt_regs *regs)
+{
+	int code = 0;
+
+	flush_fp_to_thread(current);
+
+	code = __parse_fpscr(current->thread.fpscr.val);
 
 	_exception(SIGFPE, regs, code, regs->nip);
 }
@@ -739,20 +745,7 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 	extern int do_mathemu(struct pt_regs *regs);
 
 	/* We can now get here via a FP Unavailable exception if the core
-	 * has no FPU, in that case no reason flags will be set */
-#ifdef CONFIG_MATH_EMULATION
-	/* (reason & REASON_ILLEGAL) would be the obvious thing here,
-	 * but there seems to be a hardware bug on the 405GP (RevD)
-	 * that means ESR is sometimes set incorrectly - either to
-	 * ESR_DST (!?) or 0.  In the process of chasing this with the
-	 * hardware people - not sure if it can happen on any illegal
-	 * instruction or only on FP instructions, whether there is a
-	 * pattern to occurences etc. -dgibson 31/Mar/2003 */
-	if (!(reason & REASON_TRAP) && do_mathemu(regs) == 0) {
-		emulate_single_step(regs);
-		return;
-	}
-#endif /* CONFIG_MATH_EMULATION */
+	 * has no FPU, in that case the reason flags will be 0 */
 
 	if (reason & REASON_FP) {
 		/* IEEE FP exception */
@@ -778,6 +771,31 @@ void __kprobes program_check_exception(struct pt_regs *regs)
 
 	local_irq_enable();
 
+#ifdef CONFIG_MATH_EMULATION
+	/* (reason & REASON_ILLEGAL) would be the obvious thing here,
+	 * but there seems to be a hardware bug on the 405GP (RevD)
+	 * that means ESR is sometimes set incorrectly - either to
+	 * ESR_DST (!?) or 0.  In the process of chasing this with the
+	 * hardware people - not sure if it can happen on any illegal
+	 * instruction or only on FP instructions, whether there is a
+	 * pattern to occurences etc. -dgibson 31/Mar/2003 */
+	switch (do_mathemu(regs)) {
+	case 0:
+		emulate_single_step(regs);
+		return;
+	case 1: {
+			int code = 0;
+			code = __parse_fpscr(current->thread.fpscr.val);
+			_exception(SIGFPE, regs, code, regs->nip);
+			return;
+		}
+	case -EFAULT:
+		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+		return;
+	}
+	/* fall through on any other errors */
+#endif /* CONFIG_MATH_EMULATION */
+
 	/* Try to emulate it if we should. */
 	if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) {
 		switch (emulate_instruction(regs)) {
@@ -891,18 +909,39 @@ void SoftwareEmulation(struct pt_regs *regs)
 
 #ifdef CONFIG_MATH_EMULATION
 	errcode = do_mathemu(regs);
+
+	switch (errcode) {
+	case 0:
+		emulate_single_step(regs);
+		return;
+	case 1: {
+			int code = 0;
+			code = __parse_fpscr(current->thread.fpscr.val);
+			_exception(SIGFPE, regs, code, regs->nip);
+			return;
+		}
+	case -EFAULT:
+		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+		return;
+	default:
+		_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+		return;
+	}
+
 #else
 	errcode = Soft_emulate_8xx(regs);
-#endif
-	if (errcode) {
-		if (errcode > 0)
-			_exception(SIGFPE, regs, 0, 0);
-		else if (errcode == -EFAULT)
-			_exception(SIGSEGV, regs, 0, 0);
-		else
-			_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
-	} else
+	switch (errcode) {
+	case 0:
 		emulate_single_step(regs);
+		return;
+	case 1:
+		_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+		return;
+	case -EFAULT:
+		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
+		return;
+	}
+#endif
 }
 #endif /* CONFIG_8xx */
 
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index a4b28c73bba..ae0ede19879 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -284,6 +284,13 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	 * pages though
 	 */
 	vma->vm_flags = VM_READ|VM_EXEC|VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC;
+	/*
+	 * Make sure the vDSO gets into every core dump.
+	 * Dumping its contents makes post-mortem fully interpretable later
+	 * without matching up the same kernel and hardware config to see
+	 * what PC values meant.
+	 */
+	vma->vm_flags |= VM_ALWAYSDUMP;
 	vma->vm_flags |= mm->def_flags;
 	vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
 	vma->vm_ops = &vdso_vmops;
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index e2d414160c8..4b1ba49fbd9 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -16,11 +16,11 @@ obj-$(CONFIG_PPC64)	+= checksum_64.o copypage_64.o copyuser_64.o \
 			   strcase.o
 obj-$(CONFIG_QUICC_ENGINE) += rheap.o
 obj-$(CONFIG_XMON)	+= sstep.o
+obj-$(CONFIG_KPROBES)	+= sstep.o
 obj-$(CONFIG_NOT_COHERENT_CACHE)	+= dma-noncoherent.o
 
 ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_SMP)	+= locks.o
-obj-$(CONFIG_DEBUG_KERNEL) += sstep.o
 endif
 
 # Temporary hack until we have migrated to asm-powerpc