--- old/usr/src/uts/i86xpv/os/mach_kdi.c	Fri Aug 10 23:19:21 2018
+++ /dev/null	Fri Aug 10 23:19:21 2018
@@ -1,262 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
-/*
- * Kernel/Debugger Interface (KDI) routines.  Called during debugger under
- * various system states (boot, while running, while the debugger has control).
- * Functions intended for use while the debugger has control may not grab any
- * locks or perform any functions that assume the availability of other system
- * services.
- */
-
-#include <sys/systm.h>
-#include <sys/x86_archext.h>
-#include <sys/kdi_impl.h>
-#include <sys/smp_impldefs.h>
-#include <sys/psm_types.h>
-#include <sys/segments.h>
-#include <sys/archsystm.h>
-#include <sys/controlregs.h>
-#include <sys/trap.h>
-#include <sys/kobj.h>
-#include <sys/kobj_impl.h>
-#include <sys/hypervisor.h>
-#include <sys/bootconf.h>
-#include <sys/bootinfo.h>
-#include <sys/promif.h>
-#include <sys/evtchn_impl.h>
-#include <sys/cpu.h>
-#include <vm/kboot_mmu.h>
-#include <vm/hat_pte.h>
-
-static volatile int kdi_slaves_go;
-
-/*
- * These are not safe against dropping into kmdb when fbt::: is active. This is
- * also broken on i86pc...
- */
-
-void
-kdi_idtr_write(desctbr_t *idtr)
-{
-	gate_desc_t *idt = (gate_desc_t *)idtr->dtr_base;
-	uint_t nidt = (idtr->dtr_limit + 1) / sizeof (*idt);
-	uint_t vec;
-
-	for (vec = 0; vec < nidt; vec++, idt++)
-		xen_idt_write(idt, vec);
-}
-
-void
-kdi_idt_write(gate_desc_t *gate, uint_t vec)
-{
-	gate_desc_t *idt = CPU->cpu_m.mcpu_idt;
-
-	/*
-	 * See kdi_idtr_set().
-	 */
-	if (idt != NULL)
-		idt[vec] = *gate;
-
-	xen_idt_write(gate, vec);
-}
-
-ulong_t
-kdi_dreg_get(int reg)
-{
-	return (__hypercall1(__HYPERVISOR_get_debugreg, (long)reg));
-}
-
-void
-kdi_dreg_set(int reg, ulong_t value)
-{
-	(void) __hypercall2(__HYPERVISOR_set_debugreg, (long)reg, value);
-}
-
-void
-kdi_flush_caches(void)
-{
-}
-
-/*
- * To avoid domains sucking up CPU while sitting in kmdb, we make all the slave
- * CPUs wait for a wake-up evtchn.  The master CPU, meanwhile, sleeps for
- * console activity.
- */
-
-extern void kdi_slave_entry(void);
-
-void
-kdi_stop_slaves(int cpu, int doxc)
-{
-	if (doxc)
-		kdi_xc_others(cpu, kdi_slave_entry);
-	kdi_slaves_go = 0;
-}
-
-void
-kdi_start_slaves(void)
-{
-	int c;
-
-	kdi_slaves_go = 1;
-
-	for (c = 0; c < NCPU; c++) {
-		if (cpu[c] == NULL || !(cpu[c]->cpu_flags & CPU_READY))
-			continue;
-		ec_try_ipi(XC_CPUPOKE_PIL, c);
-	}
-}
-
-/*ARGSUSED*/
-static int
-check_slave(void *arg)
-{
-	return (kdi_slaves_go == 1);
-}
-
-void
-kdi_slave_wait(void)
-{
-	if (!(cpu[CPU->cpu_id]->cpu_flags & CPU_READY))
-		return;
-
-	ec_wait_on_ipi(XC_CPUPOKE_PIL, check_slave, NULL);
-}
-
-/*
- * Caution.
- * These routines are called -extremely- early, during kmdb initialization.
- *
- * Many common kernel functions assume that %gs has been initialized,
- * and fail horribly if it hasn't.  At this point, the boot code has
- * reserved a descriptor for us (KMDBGS_SEL) in it's GDT; arrange for it
- * to point at a dummy cpu_t, temporarily at least.
- *
- * Note that kmdb entry relies on the fake cpu_t having zero cpu_idt/cpu_id.
- */
-
-#if defined(__amd64)
-
-void *
-boot_kdi_tmpinit(void)
-{
-	cpu_t *cpu = kobj_zalloc(sizeof (*cpu), KM_TMP);
-	user_desc_t *bgdt;
-	uint64_t gdtpa;
-	ulong_t ma[1];
-
-	cpu->cpu_self = cpu;
-
-	/*
-	 * (Note that we had better switch to a -new- GDT before
-	 * we discard the KM_TMP mappings, or disaster will ensue.)
-	 */
-	bgdt = kobj_zalloc(PAGESIZE, KM_TMP);
-	ASSERT(((uintptr_t)bgdt & PAGEOFFSET) == 0);
-
-	init_boot_gdt(bgdt);
-
-	gdtpa = pfn_to_pa(va_to_pfn(bgdt));
-	ma[0] = (ulong_t)(pa_to_ma(gdtpa) >> PAGESHIFT);
-	kbm_read_only((uintptr_t)bgdt, gdtpa);
-	if (HYPERVISOR_set_gdt(ma, PAGESIZE / sizeof (user_desc_t)))
-		panic("boot_kdi_tmpinit:HYPERVISOR_set_gdt() failed");
-
-	load_segment_registers(B64CODE_SEL, 0, 0, B32DATA_SEL);
-
-	/*
-	 * Now point %gsbase to our temp cpu structure.
-	 */
-	xen_set_segment_base(SEGBASE_GS_KERNEL, (ulong_t)cpu);
-	return (0);
-}
-
-/*ARGSUSED*/
-void
-boot_kdi_tmpfini(void *old)
-{
-	/*
-	 * This breaks, why do we need it anyway?
-	 */
-#if 0	/* XXPV */
-	load_segment_registers(B64CODE_SEL, 0, KMDBGS_SEL, B32DATA_SEL);
-#endif
-}
-
-#elif defined(__i386)
-
-/*
- * Sigh.  We're called before we've initialized the kernels GDT, living
- * off the hypervisor's default GDT.  For kmdb's sake, we switch now to
- * a GDT that looks like dboot's GDT; very shortly we'll initialize and
- * switch to the kernel's GDT.
- */
-
-void *
-boot_kdi_tmpinit(void)
-{
-	cpu_t *cpu = kobj_zalloc(sizeof (*cpu), KM_TMP);
-	user_desc_t *bgdt;
-	uint64_t gdtpa;
-	ulong_t ma[1];
-
-	cpu->cpu_self = cpu;
-
-	/*
-	 * (Note that we had better switch to a -new- GDT before
-	 * we discard the KM_TMP mappings, or disaster will ensue.)
-	 */
-	bgdt = kobj_zalloc(PAGESIZE, KM_TMP);
-
-	ASSERT(((uintptr_t)bgdt & PAGEOFFSET) == 0);
-	gdtpa = pfn_to_pa(va_to_pfn(bgdt));
-
-	init_boot_gdt(bgdt);
-
-	set_usegd(&bgdt[GDT_BGSTMP],
-	    cpu, sizeof (*cpu), SDT_MEMRWA, SEL_KPL, SDP_BYTES, SDP_OP32);
-
-	ma[0] = (ulong_t)(pa_to_ma(gdtpa) >> PAGESHIFT);
-	kbm_read_only((uintptr_t)bgdt, gdtpa);
-	if (HYPERVISOR_set_gdt(ma, PAGESIZE / sizeof (user_desc_t)))
-		panic("boot_kdi_tmpinit:HYPERVISOR_set_gdt() failed");
-
-	load_segment_registers(B32CODE_SEL, B32DATA_SEL, B32DATA_SEL, 0,
-	    KMDBGS_SEL, B32DATA_SEL);
-	return (0);
-}
-
-/*ARGSUSED*/
-void
-boot_kdi_tmpfini(void *old)
-{
-	load_segment_registers(B32CODE_SEL, B32DATA_SEL, B32DATA_SEL, 0,
-	    0, B32DATA_SEL);
-}
-
-#endif	/* __i386 */
