source: vbox/trunk/src/VBox/Runtime/r0drv/solaris/initterm-r0drv-solaris.c@ 41628

/* $Id: initterm-r0drv-solaris.c 40972 2012-04-18 13:30:14Z vboxsync $ */
/** @file
 * IPRT - Initialization & Termination, Ring-0 Driver, Solaris.
 */

/*
 * Copyright (C) 2006-2010 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include "the-solaris-kernel.h"
#include "internal/iprt.h"

#include <iprt/assert.h>
#include <iprt/err.h>
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
#include "internal/initterm.h"


/*******************************************************************************
*   Global Variables                                                           *
*******************************************************************************/
/** Kernel debug info handle. */
RTDBGKRNLINFO               g_hKrnlDbgInfo;
/** Indicates that the spl routines (and therefore a bunch of other ones too)
 * will set EFLAGS::IF and break code that disables interrupts.  */
bool g_frtSolSplSetsEIF                                    = false;
/** timeout_generic address. */
PFNSOL_timeout_generic      g_pfnrtR0Sol_timeout_generic   = NULL;
/** untimeout_generic address. */
PFNSOL_untimeout_generic    g_pfnrtR0Sol_untimeout_generic = NULL;
/** cyclic_reprogram address. */
PFNSOL_cyclic_reprogram     g_pfnrtR0Sol_cyclic_reprogram  = NULL;
/** Whether to use the kernel page freelist. */
bool                        g_frtSolUseKflt                = false;
/** Whether we've completed R0 initialization. */
bool                        g_frtSolInitDone               = false;
/** Whether to use old-style xc_call interface. */
bool                        g_frtSolOldIPI                 = false;
/** Whether to use old-style xc_call interface using one ulong_t as the CPU set
 *  representation. */
bool                        g_frtSolOldIPIUlong            = false;
/** The xc_call callout table structure. */
RTR0FNSOLXCCALL             g_rtSolXcCall;
/** Thread preemption offset. */
size_t                      g_offrtSolThreadPreempt;
/** Host scheduler preemption offset. */
size_t                      g_offrtSolCpuPreempt;
/** Host scheduler force preemption offset. */
size_t                      g_offrtSolCpuForceKernelPreempt;
/* Resolve using dl_lookup (remove if no longer relevant for supported S10 versions) */
extern void contig_free(void *addr, size_t size);
#pragma weak contig_free
/** contig_free address. */
PFNSOL_contig_free          g_pfnrtR0Sol_contig_free       = contig_free;

DECLHIDDEN(int) rtR0InitNative(void)
{
    /*
     * IPRT has not yet been initialized at this point, so use Solaris' native cmn_err() for logging.
     */
    int rc = RTR0DbgKrnlInfoOpen(&g_hKrnlDbgInfo, 0 /* fFlags */);
    if (RT_SUCCESS(rc))
    {
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
        /*
         * Detect whether spl*() is preserving the interrupt flag or not.
         * This is a problem on S10.
         */
        RTCCUINTREG uOldFlags = ASMIntDisableFlags();
        int iOld = splr(DISP_LEVEL);
        if (ASMIntAreEnabled())
            g_frtSolSplSetsEIF = true;
        splx(iOld);
        if (ASMIntAreEnabled())
            g_frtSolSplSetsEIF = true;
        ASMSetFlags(uOldFlags);
#else
        /* PORTME: See if the amd64/x86 problem applies to this architecture. */
#endif

        /*
         * Mandatory: Preemption offsets.
         */
        rc = RTR0DbgKrnlInfoQueryMember(g_hKrnlDbgInfo, "cpu_t", "cpu_runrun", &g_offrtSolCpuPreempt);
        if (RT_FAILURE(rc))
        {
            cmn_err(CE_NOTE, "Failed to find cpu_t::cpu_runrun!\n");
            goto errorbail;
        }

        rc = RTR0DbgKrnlInfoQueryMember(g_hKrnlDbgInfo, "cpu_t", "cpu_kprunrun", &g_offrtSolCpuForceKernelPreempt);
        if (RT_FAILURE(rc))
        {
            cmn_err(CE_NOTE, "Failed to find cpu_t::cpu_kprunrun!\n");
            goto errorbail;
        }

        rc = RTR0DbgKrnlInfoQueryMember(g_hKrnlDbgInfo, "kthread_t", "t_preempt", &g_offrtSolThreadPreempt);
        if (RT_FAILURE(rc))
        {
            cmn_err(CE_NOTE, "Failed to find kthread_t::t_preempt!\n");
            goto errorbail;
        }
        cmn_err(CE_CONT, "!cpu_t::cpu_runrun @ 0x%lx\n",    g_offrtSolCpuPreempt);
        cmn_err(CE_CONT, "!cpu_t::cpu_kprunrun @ 0x%lx\n",  g_offrtSolCpuForceKernelPreempt);
        cmn_err(CE_CONT, "!kthread_t::t_preempt @ 0x%lx\n", g_offrtSolThreadPreempt);

        /*
         * Mandatory: CPU cross call infrastructure. Refer the-solaris-kernel.h for details.
         */
        rc = RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "xc_init_cpu", NULL /* ppvSymbol */);
        if (RT_SUCCESS(rc))
        {
            if (ncpus > IPRT_SOL_NCPUS)
            {
                cmn_err(CE_NOTE, "rtR0InitNative: CPU count mismatch! ncpus=%d IPRT_SOL_NCPUS=%d\n", ncpus, IPRT_SOL_NCPUS);
                rc = VERR_NOT_SUPPORTED;
                goto errorbail;
            }
            g_rtSolXcCall.u.pfnSol_xc_call = (void *)xc_call;
        }
        else
        {
            g_frtSolOldIPI = true;
            g_rtSolXcCall.u.pfnSol_xc_call_old = (void *)xc_call;
            if (max_cpuid + 1 == sizeof(ulong_t) * 8)
            {
                g_frtSolOldIPIUlong = true;
                g_rtSolXcCall.u.pfnSol_xc_call_old_ulong = (void *)xc_call;
            }
            else if (max_cpuid + 1 != IPRT_SOL_NCPUS)
            {
                cmn_err(CE_NOTE, "rtR0InitNative: cpuset_t size mismatch! max_cpuid=%d IPRT_SOL_NCPUS=%d\n", max_cpuid, IPRT_SOL_NCPUS);
                rc = VERR_NOT_SUPPORTED;
                goto errorbail;
            }
        }

        /*
         * Optional: Timeout hooks.
         */
        RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "timeout_generic", (void **)&g_pfnrtR0Sol_timeout_generic);
        RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "untimeout_generic", (void **)&g_pfnrtR0Sol_untimeout_generic);
        if ((g_pfnrtR0Sol_timeout_generic == NULL) != (g_pfnrtR0Sol_untimeout_generic == NULL))
        {
            static const char *s_apszFn[2] = { "timeout_generic", "untimeout_generic" };
            bool iMissingFn = g_pfnrtR0Sol_timeout_generic == NULL;
            cmn_err(CE_NOTE, "rtR0InitNative: Weird! Found %s but not %s!\n", s_apszFn[!iMissingFn], s_apszFn[iMissingFn]);
            g_pfnrtR0Sol_timeout_generic   = NULL;
            g_pfnrtR0Sol_untimeout_generic = NULL;
        }
        RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "cyclic_reprogram", (void **)&g_pfnrtR0Sol_cyclic_reprogram);

        /*
         * Optional: Kernel page freelist (kflt)
         *
         * Only applicable to 64-bit Solaris kernels. Use kflt flags to get pages from kernel page freelists
         * while allocating physical pages, once the userpages are exhausted. snv_161+, see @bugref{5632}.
         */
        rc = RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "kflt_init", NULL /* ppvSymbol */);
        if (RT_SUCCESS(rc))
        {
            int *pKfltDisable = NULL;
            rc = RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "kflt_disable", (void **)&pKfltDisable);
            if (RT_SUCCESS(rc) && pKfltDisable && *pKfltDisable == 0)
                g_frtSolUseKflt = true;
        }

        /*
         * Weak binding failures: contig_free
         */
        if (g_pfnrtR0Sol_contig_free == NULL)
        {
            rc = RTR0DbgKrnlInfoQuerySymbol(g_hKrnlDbgInfo, NULL /* pszModule */, "contig_free", (void **)&g_pfnrtR0Sol_contig_free);
            if (RT_FAILURE(rc))
            {
                cmn_err(CE_NOTE, "rtR0InitNative: failed to find contig_free!\n");
                goto errorbail;
            }
        }

        g_frtSolInitDone = true;
        return VINF_SUCCESS;
    }
    else
    {
        cmn_err(CE_NOTE, "RTR0DbgKrnlInfoOpen failed. rc=%d\n", rc);
        return rc;
    }

errorbail:
    RTR0DbgKrnlInfoRelease(g_hKrnlDbgInfo);
    return rc;
}


DECLHIDDEN(void) rtR0TermNative(void)
{
    RTR0DbgKrnlInfoRelease(g_hKrnlDbgInfo);
    g_frtSolInitDone = false;
}