669 lines
16 KiB
C++
669 lines
16 KiB
C++
/*
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* \brief VirtualBox page manager (PGM)
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* \author Norman Feske
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* \date 2013-08-20
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*/
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/*
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* Copyright (C) 2013 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/* Genode includes */
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#include <base/log.h>
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#include <util/string.h>
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/* VirtualBox includes */
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#include "PGMInternal.h" /* enable access to pgm.s.* */
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#include "EMInternal.h"
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#include <VBox/vmm/mm.h>
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#include <VBox/vmm/vm.h>
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#include <VBox/vmm/pgm.h>
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#include <VBox/vmm/rem.h>
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#include <iprt/err.h>
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/* local includes */
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#include "util.h"
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#include "vmm_memory.h"
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#include "guest_memory.h"
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using Genode::Ram_session;
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using Genode::Rm_session;
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Vmm_memory *vmm_memory()
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{
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static Vmm_memory inst(genode_env());
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return &inst;
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}
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Guest_memory *guest_memory()
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{
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static Guest_memory inst;
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return &inst;
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}
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static DECLCALLBACK(int) romwritehandler(PVM pVM, RTGCPHYS GCPhys,
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void *pvPhys, void *pvBuf,
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size_t cbBuf,
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PGMACCESSTYPE enmAccessType,
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void *pvUser)
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{
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Assert(!"Somebody tries to write to ROM");
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return -1;
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}
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int PGMR3PhysRomRegister(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys,
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RTGCPHYS cb, const void *pvBinary, uint32_t cbBinary,
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uint32_t fFlags, const char *pszDesc)
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{
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try {
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RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
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size_t size = (size_t)cb;
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Assert(cb == size);
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void *pv = vmm_memory()->alloc_rom(size, pDevIns);
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Assert(pv);
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memcpy(pv, pvBinary, size);
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/* associate memory of VMM with guest VM */
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vmm_memory()->map_to_vm(pDevIns, GCPhys);
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guest_memory()->add_rom_mapping(GCPhys, cb, pv, pDevIns);
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bool fShadowed = fFlags & PGMPHYS_ROM_FLAGS_SHADOWED;
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Assert(!fShadowed);
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int rc = PGMR3HandlerPhysicalRegister(pVM,
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PGMPHYSHANDLERTYPE_PHYSICAL_WRITE,
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GCPhys, GCPhysLast,
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romwritehandler,
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NULL,
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NULL, NULL, 0,
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NULL, NULL, 0, pszDesc);
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Assert(rc == VINF_SUCCESS);
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#ifdef VBOX_WITH_REM
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REMR3NotifyPhysRomRegister(pVM, GCPhys, cb, NULL, fShadowed);
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#endif
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}
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catch (Guest_memory::Region_conflict) { return VERR_PGM_MAPPING_CONFLICT; }
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catch (Ram_session::Alloc_failed) { return VERR_PGM_MAPPING_CONFLICT; }
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catch (Rm_session::Attach_failed) { return VERR_PGM_MAPPING_CONFLICT; }
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return VINF_SUCCESS;
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}
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int PGMPhysWrite(PVM pVM, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite)
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{
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void *pv = guest_memory()->lookup(GCPhys, cbWrite);
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if (pv) {
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void * pvx = vmm_memory()->lookup(GCPhys, cbWrite);
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Assert(!pvx);
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memcpy(pv, pvBuf, cbWrite);
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return VINF_SUCCESS;
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}
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PFNPGMR3PHYSHANDLER pfnHandlerR3 = 0;
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void *pvUserR3 = 0;
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pv = vmm_memory()->lookup(GCPhys, cbWrite, &pfnHandlerR3, &pvUserR3);
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if (!pv || !pfnHandlerR3 || !pvUserR3) {
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Genode::error(__func__, " skipped: GCPhys=", Genode::Hex(GCPhys));
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return VERR_GENERAL_FAILURE;
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}
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int rc = pfnHandlerR3(pVM, GCPhys, 0, 0, cbWrite, PGMACCESSTYPE_WRITE,
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pvUserR3);
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if (rc != VINF_PGM_HANDLER_DO_DEFAULT) {
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Genode::error(__FUNCTION__, " unexpected return code ", rc);
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return VERR_GENERAL_FAILURE;
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}
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memcpy(pv, pvBuf, cbWrite);
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return VINF_SUCCESS;
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}
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int PGMR3PhysWriteExternal(PVM pVM, RTGCPHYS GCPhys, const void *pvBuf,
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size_t cbWrite, const char *pszWho)
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{
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VM_ASSERT_OTHER_THREAD(pVM);
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return PGMPhysWrite(pVM, GCPhys, pvBuf, cbWrite);
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}
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int PGMPhysRead(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
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{
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void *pv = guest_memory()->lookup(GCPhys, cbRead);
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if (pv) {
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void * pvx = vmm_memory()->lookup(GCPhys, cbRead);
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Assert(!pvx);
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memcpy(pvBuf, pv, cbRead);
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return VINF_SUCCESS;
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}
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PFNPGMR3PHYSHANDLER pfnHandlerR3 = 0;
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void *pvUserR3 = 0;
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pv = vmm_memory()->lookup(GCPhys, cbRead, &pfnHandlerR3, &pvUserR3);
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if (!pv || !pfnHandlerR3 || !pvUserR3) {
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Genode::error("PGMPhysRead skipped: GCPhys=", Genode::Hex(GCPhys));
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return VERR_GENERAL_FAILURE;
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}
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memcpy(pvBuf, pv, cbRead);
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return VINF_SUCCESS;
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}
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int PGMR3PhysReadExternal(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
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{
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VM_ASSERT_OTHER_THREAD(pVM);
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return PGMPhysRead(pVM, GCPhys, pvBuf, cbRead);
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}
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int PGMR3PhysMMIO2Register(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion,
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RTGCPHYS cb, uint32_t fFlags, void **ppv, const char
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*pszDesc)
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{
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*ppv = vmm_memory()->alloc((size_t)cb, pDevIns, iRegion);
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return VINF_SUCCESS;
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}
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int PGMR3PhysMMIO2Deregister(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion)
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{
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Genode::warning(__func__, ": pDevIns ", pDevIns, " iRegion=", iRegion);
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return VINF_SUCCESS;
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}
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int PGMR3PhysMMIO2Map(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion,
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RTGCPHYS GCPhys)
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{
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size_t cb = vmm_memory()->map_to_vm(pDevIns, GCPhys, iRegion);
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if (cb == 0) {
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Genode::error(__func__, ": lookup for pDevIns=", pDevIns, " iRegion=",
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iRegion, " failed");
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Assert(cb);
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}
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#ifdef VBOX_WITH_REM
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REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_MMIO2);
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#endif
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return VINF_SUCCESS;
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}
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int PGMR3PhysMMIO2Unmap(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion,
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RTGCPHYS GCPhys)
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{
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RTGCPHYS GCPhysStart = GCPhys;
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Genode::size_t size = 1;
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bool io = vmm_memory()->lookup_range(GCPhysStart, size);
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Assert(io);
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Assert(GCPhysStart == GCPhys);
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bool INVALIDATE = true;
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bool ok = vmm_memory()->unmap_from_vm(GCPhys, size, INVALIDATE);
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Assert(ok);
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#ifdef VBOX_WITH_REM
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REMR3NotifyPhysRamDeregister(pVM, GCPhysStart, size);
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#endif
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return VINF_SUCCESS;
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}
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bool PGMR3PhysMMIO2IsBase(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys)
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{
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return vmm_memory()->lookup(GCPhys, 1);
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}
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int PGMR3HandlerPhysicalRegister(PVM pVM, PGMPHYSHANDLERTYPE enmType,
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RTGCPHYS GCPhys, RTGCPHYS GCPhysLast,
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PFNPGMR3PHYSHANDLER pfnHandlerR3,
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void *pvUserR3, const char *pszModR0,
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const char *pszHandlerR0, RTR0PTR pvUserR0,
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const char *pszModRC,
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const char *pszHandlerRC,
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RTRCPTR pvUserRC, const char *pszDesc)
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{
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bool ok = vmm_memory()->add_handler(GCPhys, GCPhysLast - GCPhys + 1,
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pfnHandlerR3, pvUserR3, enmType);
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Assert(ok);
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#ifdef VBOX_WITH_REM
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REMR3NotifyHandlerPhysicalRegister(pVM, enmType, GCPhys, GCPhysLast -
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GCPhys + 1, !!pfnHandlerR3);
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#endif
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return VINF_SUCCESS;
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}
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int PGMHandlerPhysicalDeregister(PVM pVM, RTGCPHYS GCPhys)
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{
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Genode::size_t size = 1;
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#ifdef VBOX_WITH_REM
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PFNPGMR3PHYSHANDLER pfnHandlerR3 = 0;
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PGMPHYSHANDLERTYPE enmType = PGMPHYSHANDLERTYPE_MMIO;
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void * pv = vmm_memory()->lookup(GCPhys, size, &pfnHandlerR3, 0, &enmType);
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Assert(pv);
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#endif
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bool ok = vmm_memory()->add_handler(GCPhys, size, 0, 0);
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Assert(ok);
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#ifdef VBOX_WITH_REM
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bool fRestoreAsRAM = pfnHandlerR3 && enmType != PGMPHYSHANDLERTYPE_MMIO;
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/* GCPhysstart and size gets written ! */
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RTGCPHYS GCPhysStart = GCPhys;
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bool io = vmm_memory()->lookup_range(GCPhysStart, size);
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Assert(io);
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REMR3NotifyHandlerPhysicalDeregister(pVM, enmType, GCPhysStart, size,
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!!pfnHandlerR3, fRestoreAsRAM);
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#endif
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return VINF_SUCCESS;
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}
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int PGMR3PhysRegisterRam(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb,
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const char *pszDesc)
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{
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try {
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/*
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* XXX Is this function the right place for the allocation?
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* The lack of allocation-related VERR_PGM_ error codes suggests
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* so.
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*/
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size_t size = (size_t)cb;
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Assert(cb == size);
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void *pv = vmm_memory()->alloc_ram(size);
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guest_memory()->add_ram_mapping(GCPhys, cb, pv);
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#ifdef VBOX_WITH_REM
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REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_RAM);
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#endif
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}
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catch (Guest_memory::Region_conflict) {
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return VERR_PGM_MAPPING_CONFLICT; }
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catch (Ram_session::Alloc_failed) {
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return VERR_PGM_MAPPING_CONFLICT; /* XXX use a better error code? */ }
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catch (Rm_session::Attach_failed) {
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return VERR_PGM_MAPPING_CONFLICT; /* XXX use a better error code? */ }
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return VINF_SUCCESS;
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}
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int PGMMapSetPage(PVM pVM, RTGCPTR GCPtr, uint64_t cb, uint64_t fFlags)
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{
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return VINF_SUCCESS;
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}
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RTHCPHYS PGMGetHyperCR3(PVMCPU pVCpu)
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{
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return 1;
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}
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int PGMR3Init(PVM pVM)
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{
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/*
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* Satisfy assertion in VMMR3Init. Normally called via:
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*
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* PGMR3Init -> pgmR3InitPaging -> pgmR3ModeDataInit -> InitData -> MapCR3
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*/
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for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++) {
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PVMCPU pVCpu = &pVM->aCpus[idCpu];
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CPUMSetHyperCR3(pVCpu, PGMGetHyperCR3(pVCpu));
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pVCpu->pgm.s.fA20Enabled = true;
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pVCpu->pgm.s.GCPhysA20Mask = ~((RTGCPHYS)!pVCpu->pgm.s.fA20Enabled << 20);
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}
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int rc = PDMR3CritSectInit(pVM, &pVM->pgm.s.CritSectX, RT_SRC_POS, "PGM");
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AssertRCReturn(rc, rc);
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return VINF_SUCCESS;
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}
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int PGMR3Term(PVM pVM) { return VINF_SUCCESS; }
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int PGMPhysGCPtr2CCPtrReadOnly(PVMCPU pVCpu, RTGCPTR GCPtr, void const **ppv,
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PPGMPAGEMAPLOCK pLock)
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{
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Genode::error(__func__, " not implemented - caller ",
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__builtin_return_address(0));
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Assert(!"not implemented");
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return VERR_GENERAL_FAILURE;
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}
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int PGMR3PhysTlbGCPhys2Ptr(PVM pVM, RTGCPHYS GCPhys, bool fWritable, void **ppv)
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{
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size_t const size = 1;
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PFNPGMR3PHYSHANDLER pfnHandlerR3 = 0;
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void *pvUserR3 = 0;
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PGMPHYSHANDLERTYPE enmType;
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void * pv = vmm_memory()->lookup(GCPhys, size, &pfnHandlerR3, &pvUserR3,
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&enmType);
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if (!pv) {
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/* It could be ordinary guest memory - look it up. */
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pv = guest_memory()->lookup(GCPhys, size);
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if (!pv) {
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Genode::error(__func__, ": lookup for GCPhys=",
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Genode::Hex(GCPhys), " failed");
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return VERR_PGM_PHYS_TLB_UNASSIGNED;
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}
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*ppv = pv;
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return VINF_SUCCESS;
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}
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/* pv valid - check handlers next */
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if (!pfnHandlerR3 && !pvUserR3) {
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*ppv = pv;
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return VINF_SUCCESS;
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}
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if (enmType == PGMPHYSHANDLERTYPE_PHYSICAL_WRITE) {
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*ppv = pv;
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return VINF_PGM_PHYS_TLB_CATCH_WRITE;
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}
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Genode::error(__func__, ": denied access - handlers set - GCPhys=",
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Genode::Hex(GCPhys));
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return VERR_PGM_PHYS_TLB_CATCH_ALL;
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}
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void PGMR3PhysSetA20(PVMCPU pVCpu, bool fEnable)
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{
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if (!pVCpu->pgm.s.fA20Enabled != fEnable) {
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pVCpu->pgm.s.fA20Enabled = fEnable;
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#ifdef VBOX_WITH_REM
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REMR3A20Set(pVCpu->pVMR3, pVCpu, fEnable);
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#endif
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}
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return;
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}
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bool PGMPhysIsA20Enabled(PVMCPU pVCpu)
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{
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return pVCpu->pgm.s.fA20Enabled;
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}
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template <typename T>
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static void PGMR3PhysWrite(PVM pVM, RTGCPHYS GCPhys, T value)
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{
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VM_ASSERT_EMT(pVM);
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void *pv = guest_memory()->lookup(GCPhys, sizeof(value));
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if (!pv) {
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Genode::error(__func__, ": invalid write attempt GCPhys=",
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Genode::Hex(GCPhys));
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return;
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}
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/* sanity check */
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void * pvx = vmm_memory()->lookup(GCPhys, sizeof(value));
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Assert(!pvx);
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*reinterpret_cast<T *>(pv) = value;
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}
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void PGMR3PhysWriteU8(PVM pVM, RTGCPHYS GCPhys, uint8_t value)
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{
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PGMR3PhysWrite(pVM, GCPhys, value);
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}
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void PGMR3PhysWriteU16(PVM pVM, RTGCPHYS GCPhys, uint16_t value)
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{
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PGMR3PhysWrite(pVM, GCPhys, value);
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}
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void PGMR3PhysWriteU32(PVM pVM, RTGCPHYS GCPhys, uint32_t value)
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{
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PGMR3PhysWrite(pVM, GCPhys, value);
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}
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template <typename T>
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static T PGMR3PhysRead(PVM pVM, RTGCPHYS GCPhys)
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{
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void *pv = guest_memory()->lookup(GCPhys, sizeof(T));
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if (!pv) {
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Genode::error(__func__, ": invalid read attempt GCPhys=",
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Genode::Hex(GCPhys));
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return 0;
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}
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/* sanity check */
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void * pvx = vmm_memory()->lookup(GCPhys, sizeof(T));
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Assert(!pvx);
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return *reinterpret_cast<T *>(pv);
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}
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uint64_t PGMR3PhysReadU64(PVM pVM, RTGCPHYS GCPhys)
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{
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return PGMR3PhysRead<uint64_t>(pVM, GCPhys);
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}
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uint32_t PGMR3PhysReadU32(PVM pVM, RTGCPHYS GCPhys)
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{
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return PGMR3PhysRead<uint32_t>(pVM, GCPhys);
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}
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int PGMPhysGCPhys2CCPtrReadOnly(PVM pVM, RTGCPHYS GCPhys, void const **ppv,
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PPGMPAGEMAPLOCK pLock)
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{
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void *pv = guest_memory()->lookup(GCPhys, 0x1000);
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if (!pv) {
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Genode::error("unknown address GCPhys=", Genode::Hex(GCPhys));
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guest_memory()->dump();
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return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
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}
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*ppv = pv;
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return VINF_SUCCESS;
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}
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int PGMHandlerPhysicalReset(PVM, RTGCPHYS GCPhys)
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{
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size_t size = 1;
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if (!vmm_memory()->unmap_from_vm(GCPhys, size))
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Genode::warning(__func__, ": unbacked region - GCPhys ",
|
|
Genode::Hex(GCPhys));
|
|
|
|
return VINF_SUCCESS;
|
|
}
|
|
|
|
|
|
extern "C" int MMIO2_MAPPED_SYNC(PVM pVM, RTGCPHYS GCPhys, size_t cbWrite,
|
|
void **ppv, Genode::Flexpage_iterator &fli,
|
|
bool &writeable)
|
|
{
|
|
using Genode::Flexpage_iterator;
|
|
using Genode::addr_t;
|
|
|
|
/* DON'T USE normal printf in this function - corrupts unsaved UTCB !!! */
|
|
|
|
PFNPGMR3PHYSHANDLER pfnHandlerR3 = 0;
|
|
void *pvUserR3 = 0;
|
|
|
|
void * pv = vmm_memory()->lookup(GCPhys, cbWrite, &pfnHandlerR3, &pvUserR3);
|
|
|
|
if (!pv)
|
|
return VERR_PGM_PHYS_TLB_UNASSIGNED;
|
|
|
|
fli = Flexpage_iterator((addr_t)pv, cbWrite, GCPhys, cbWrite, GCPhys);
|
|
|
|
if (!pfnHandlerR3 && !pvUserR3) {
|
|
*ppv = pv;
|
|
/* you may map it */
|
|
return VINF_SUCCESS;
|
|
}
|
|
|
|
if (pfnHandlerR3 && pvUserR3) {
|
|
int rc = pfnHandlerR3(pVM, GCPhys, 0, 0, cbWrite, PGMACCESSTYPE_WRITE,
|
|
pvUserR3);
|
|
|
|
if (rc == VINF_PGM_HANDLER_DO_DEFAULT) {
|
|
*ppv = pv;
|
|
/* you may map it */
|
|
return VINF_SUCCESS;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
RTGCPHYS map_start = GCPhys;
|
|
Genode::size_t map_size = 1;
|
|
|
|
bool io = vmm_memory()->lookup_range(map_start, map_size);
|
|
Assert(io);
|
|
|
|
pv = vmm_memory()->lookup(map_start, map_size);
|
|
Assert(pv);
|
|
|
|
fli = Flexpage_iterator((addr_t)pv, map_size, map_start, map_size, map_start);
|
|
|
|
*ppv = pv;
|
|
|
|
writeable = false;
|
|
|
|
return VINF_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Resets a virtual CPU when unplugged.
|
|
*
|
|
* @param pVM Pointer to the VM.
|
|
* @param pVCpu Pointer to the VMCPU.
|
|
*/
|
|
VMMR3DECL(void) PGMR3ResetCpu(PVM pVM, PVMCPU pVCpu)
|
|
{
|
|
int rc = PGMR3ChangeMode(pVM, pVCpu, PGMMODE_REAL);
|
|
AssertRC(rc);
|
|
|
|
/*
|
|
* Re-init other members.
|
|
*/
|
|
pVCpu->pgm.s.fA20Enabled = true;
|
|
pVCpu->pgm.s.GCPhysA20Mask = ~((RTGCPHYS)!pVCpu->pgm.s.fA20Enabled << 20);
|
|
|
|
/*
|
|
* Clear the FFs PGM owns.
|
|
*/
|
|
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL);
|
|
}
|
|
|
|
|
|
void PGMR3Reset(PVM pVM)
|
|
{
|
|
VM_ASSERT_EMT(pVM);
|
|
|
|
for (VMCPUID i = 0; i < pVM->cCpus; i++)
|
|
{
|
|
// int rc = PGMR3ChangeMode(pVM, &pVM->aCpus[i], PGMMODE_REAL);
|
|
// AssertRC(rc);
|
|
}
|
|
|
|
for (VMCPUID i = 0; i < pVM->cCpus; i++)
|
|
{
|
|
PVMCPU pVCpu = &pVM->aCpus[i];
|
|
|
|
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL);
|
|
|
|
VMCPU_FF_SET(pVCpu, VMCPU_FF_TLB_FLUSH);
|
|
|
|
if (!pVCpu->pgm.s.fA20Enabled)
|
|
{
|
|
pVCpu->pgm.s.fA20Enabled = true;
|
|
pVCpu->pgm.s.GCPhysA20Mask = ~((RTGCPHYS)!pVCpu->pgm.s.fA20Enabled << 20);
|
|
#ifdef PGM_WITH_A20
|
|
pVCpu->pgm.s.fSyncFlags |= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
|
|
VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
|
|
HMFlushTLB(pVCpu);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
vmm_memory()->revoke_all();
|
|
}
|
|
|
|
|
|
int PGMR3MappingsSize(PVM pVM, uint32_t *pcb)
|
|
{
|
|
*pcb = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void PGMR3MemSetup(PVM pVM, bool fAtReset) { }
|
|
|
|
|
|
VMMDECL(bool) PGMIsLockOwner(PVM pVM)
|
|
{
|
|
return PDMCritSectIsOwner(&pVM->pgm.s.CritSectX);
|
|
}
|
|
|
|
|
|
VMM_INT_DECL(void) PGMNotifyNxeChanged(PVMCPU pVCpu, bool fNxe) { }
|