ARC fixes for 5.7

- Recent DSP code regressing ARC700 platforms
 
  - Thinkos in ICCM/DCCM size checks
 
  - USB regression
 
  - other small fixes here and there
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Merge tag 'arc-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - fix recent DSP code regression on ARC700 platforms

 - fix thinkos in ICCM/DCCM size checks

 - USB regression fix

 - other small fixes here and there

* tag 'arc-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: show_regs: avoid extra line of output
  ARC: guard dsp early init against non ARCv2
  ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT
  ARC: entry: comment
  arc: remove #ifndef CONFIG_AS_CFI_SIGNAL_FRAME
  arc: ptrace: hard-code "arc" instead of UTS_MACHINE
  ARC: [plat-hsdk]: fix USB regression
  ARC: Fix ICCM & DCCM runtime size checks

arch/arc/configs/hsdk_defconfig

@@ -65,6 +65,7 @@ CONFIG_DRM_UDL=y
 CONFIG_DRM_ETNAVIV=y
 CONFIG_FB=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_HCD_PLATFORM=y
 CONFIG_USB_OHCI_HCD=y

arch/arc/include/asm/dsp-impl.h

@@ -15,12 +15,14 @@
 
 /* clobbers r5 register */
 .macro DSP_EARLY_INIT
+#ifdef CONFIG_ISA_ARCV2
 	lr	r5, [ARC_AUX_DSP_BUILD]
 	bmsk	r5, r5, 7
 	breq    r5, 0, 1f
 	mov	r5, DSP_CTRL_DISABLED_ALL
 	sr	r5, [ARC_AUX_DSP_CTRL]
 1:
+#endif
 .endm
 
 /* clobbers r10, r11 registers pair */

arch/arc/include/asm/entry-arcv2.h

@@ -233,6 +233,8 @@
 
 #ifdef CONFIG_ARC_IRQ_NO_AUTOSAVE
 	__RESTORE_REGFILE_HARD
+
+	; SP points to PC/STAT32: hw restores them despite NO_AUTOSAVE
 	add	sp, sp, SZ_PT_REGS - 8
 #else
 	add	sp, sp, PT_r0

arch/arc/kernel/Makefile

@@ -3,9 +3,6 @@
 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 #
 
-# Pass UTS_MACHINE for user_regset definition
-CFLAGS_ptrace.o		+= -DUTS_MACHINE='"$(UTS_MACHINE)"'
-
 obj-y	:= arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
 obj-y	+= signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o
 obj-$(CONFIG_ISA_ARCOMPACT)		+= entry-compact.o intc-compact.o

arch/arc/kernel/ptrace.c

@@ -253,7 +253,7 @@ static const struct user_regset arc_regsets[] = {
 };
 
 static const struct user_regset_view user_arc_view = {
-	.name		= UTS_MACHINE,
+	.name		= "arc",
 	.e_machine	= EM_ARC_INUSE,
 	.regsets	= arc_regsets,
 	.n		= ARRAY_SIZE(arc_regsets)

arch/arc/kernel/setup.c

@@ -11,6 +11,7 @@
 #include <linux/clocksource.h>
 #include <linux/console.h>
 #include <linux/module.h>
+#include <linux/sizes.h>
 #include <linux/cpu.h>
 #include <linux/of_clk.h>
 #include <linux/of_fdt.h>
@@ -424,12 +425,12 @@ static void arc_chk_core_config(void)
 	if ((unsigned int)__arc_dccm_base != cpu->dccm.base_addr)
 		panic("Linux built with incorrect DCCM Base address\n");
 
-	if (CONFIG_ARC_DCCM_SZ != cpu->dccm.sz)
+	if (CONFIG_ARC_DCCM_SZ * SZ_1K != cpu->dccm.sz)
 		panic("Linux built with incorrect DCCM Size\n");
 #endif
 
 #ifdef CONFIG_ARC_HAS_ICCM
-	if (CONFIG_ARC_ICCM_SZ != cpu->iccm.sz)
+	if (CONFIG_ARC_ICCM_SZ * SZ_1K != cpu->iccm.sz)
 		panic("Linux built with incorrect ICCM Size\n");
 #endif
 

arch/arc/kernel/troubleshoot.c

@@ -191,10 +191,9 @@ void show_regs(struct pt_regs *regs)
 	if (user_mode(regs))
 		show_faulting_vma(regs->ret); /* faulting code, not data */
 
-	pr_info("ECR: 0x%08lx EFA: 0x%08lx ERET: 0x%08lx\n",
-		regs->event, current->thread.fault_address, regs->ret);
-
-	pr_info("STAT32: 0x%08lx", regs->status32);
+	pr_info("ECR: 0x%08lx EFA: 0x%08lx ERET: 0x%08lx\nSTAT: 0x%08lx",
+		regs->event, current->thread.fault_address, regs->ret,
+		regs->status32);
 
 #define STS_BIT(r, bit)	r->status32 & STATUS_##bit##_MASK ? #bit" " : ""
 
@@ -210,11 +209,10 @@ void show_regs(struct pt_regs *regs)
 			(regs->status32 & STATUS_U_MASK) ? "U " : "K ",
 			STS_BIT(regs, DE), STS_BIT(regs, AE));
 #endif
-	pr_cont("  BTA: 0x%08lx\n", regs->bta);
-	pr_info("BLK: %pS\n SP: 0x%08lx  FP: 0x%08lx\n",
-		(void *)regs->blink, regs->sp, regs->fp);
+	pr_cont("  BTA: 0x%08lx\n  SP: 0x%08lx  FP: 0x%08lx BLK: %pS\n",
+		regs->bta, regs->sp, regs->fp, (void *)regs->blink);
 	pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",
-	       regs->lp_start, regs->lp_end, regs->lp_count);
+		regs->lp_start, regs->lp_end, regs->lp_count);
 
 	/* print regs->r0 thru regs->r12
 	 * Sequential printing was generating horrible code

arch/arc/kernel/unwind.c

@@ -1178,11 +1178,9 @@ int arc_unwind(struct unwind_frame_info *frame)
 #endif
 
 	/* update frame */
-#ifndef CONFIG_AS_CFI_SIGNAL_FRAME
 	if (frame->call_frame
 	    && !UNW_DEFAULT_RA(state.regs[retAddrReg], state.dataAlign))
 		frame->call_frame = 0;
-#endif
 	cfa = FRAME_REG(state.cfa.reg, unsigned long) + state.cfa.offs;
 	startLoc = min_t(unsigned long, UNW_SP(frame), cfa);
 	endLoc = max_t(unsigned long, UNW_SP(frame), cfa);

arch/arc/plat-eznps/Kconfig

@@ -6,6 +6,7 @@
 
 menuconfig ARC_PLAT_EZNPS
 	bool "\"EZchip\" ARC dev platform"
+	depends on ISA_ARCOMPACT
 	select CPU_BIG_ENDIAN
 	select CLKSRC_NPS if !PHYS_ADDR_T_64BIT
 	select EZNPS_GIC