/**
* Performs a GMMR0AllocatePages request.
*
* This will call VMSetError on failure.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param pReq Pointer to the request (returned by GMMR3AllocatePagesPrepare).
*/
GMMR3DECL(int) GMMR3AllocatePagesPerform(PVM pVM, PGMMALLOCATEPAGESREQ pReq)
{
for (unsigned i = 0; ; i++)
{
int rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_ALLOCATE_PAGES, 0, &pReq->Hdr);
if (RT_SUCCESS(rc))
{
#ifdef LOG_ENABLED
for (uint32_t iPage = 0; iPage < pReq->cPages; iPage++)
Log3(("GMMR3AllocatePagesPerform: idPage=%#x HCPhys=%RHp\n",
pReq->aPages[iPage].idPage, pReq->aPages[iPage].HCPhysGCPhys));
#endif
return rc;
}
if (rc != VERR_GMM_SEED_ME)
return VMSetError(pVM, rc, RT_SRC_POS,
N_("GMMR0AllocatePages failed to allocate %u pages"),
pReq->cPages);
Assert(i < pReq->cPages);
/*
* Seed another chunk.
*/
void *pvChunk;
rc = SUPR3PageAlloc(GMM_CHUNK_SIZE >> PAGE_SHIFT, &pvChunk);
if (RT_FAILURE(rc))
return VMSetError(pVM, rc, RT_SRC_POS,
N_("Out of memory (SUPR3PageAlloc) seeding a %u pages allocation request"),
pReq->cPages);
rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_SEED_CHUNK, (uintptr_t)pvChunk, NULL);
if (RT_FAILURE(rc))
return VMSetError(pVM, rc, RT_SRC_POS, N_("GMM seeding failed"));
}
}
/**
* Initializes the tracing.
*
* @returns VBox status code
* @param pVM The cross context VM structure.
*/
int dbgfR3TraceInit(PVM pVM)
{
/*
* Initialize the trace buffer handles.
*/
Assert(NIL_RTTRACEBUF == (RTTRACEBUF)NULL);
pVM->hTraceBufR3 = NIL_RTTRACEBUF;
pVM->hTraceBufRC = NIL_RTRCPTR;
pVM->hTraceBufR0 = NIL_RTR0PTR;
/*
* Check the config and enable tracing if requested.
*/
PCFGMNODE pDbgfNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGF");
#if defined(DEBUG) || defined(RTTRACE_ENABLED)
bool const fDefault = false;
const char * const pszConfigDefault = "";
#else
bool const fDefault = false;
const char * const pszConfigDefault = "";
#endif
bool fTracingEnabled;
int rc = CFGMR3QueryBoolDef(pDbgfNode, "TracingEnabled", &fTracingEnabled, fDefault);
AssertRCReturn(rc, rc);
if (fTracingEnabled)
{
rc = dbgfR3TraceEnable(pVM, 0, 0);
if (RT_SUCCESS(rc))
{
if (pDbgfNode)
{
char *pszTracingConfig;
rc = CFGMR3QueryStringAllocDef(pDbgfNode, "TracingConfig", &pszTracingConfig, pszConfigDefault);
if (RT_SUCCESS(rc))
{
rc = DBGFR3TraceConfig(pVM, pszTracingConfig);
if (RT_FAILURE(rc))
rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" -> %Rrc", pszTracingConfig, rc);
MMR3HeapFree(pszTracingConfig);
}
}
else
{
rc = DBGFR3TraceConfig(pVM, pszConfigDefault);
if (RT_FAILURE(rc))
rc = VMSetError(pVM, rc, RT_SRC_POS, "TracingConfig=\"%s\" (default) -> %Rrc", pszConfigDefault, rc);
}
}
}
/*
* Register a debug info item that will dump the trace buffer content.
*/
if (RT_SUCCESS(rc))
rc = DBGFR3InfoRegisterInternal(pVM, "tracebuf", "Display the trace buffer content. No arguments.", dbgfR3TraceInfo);
return rc;
}
/**
* Performs a GMMR0FreePages request.
* This will call VMSetError on failure.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param pReq Pointer to the request (returned by GMMR3FreePagesPrepare).
* @param cActualPages The number of pages actually freed.
*/
GMMR3DECL(int) GMMR3FreePagesPerform(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t cActualPages)
{
/*
* Adjust the request if we ended up with fewer pages than anticipated.
*/
if (cActualPages != pReq->cPages)
{
AssertReturn(cActualPages < pReq->cPages, VERR_GMM_ACTUAL_PAGES_IPE);
if (!cActualPages)
return VINF_SUCCESS;
pReq->cPages = cActualPages;
pReq->Hdr.cbReq = RT_OFFSETOF(GMMFREEPAGESREQ, aPages[cActualPages]);
}
/*
* Do the job.
*/
int rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_FREE_PAGES, 0, &pReq->Hdr);
if (RT_SUCCESS(rc))
return rc;
AssertRC(rc);
return VMSetError(pVM, rc, RT_SRC_POS,
N_("GMMR0FreePages failed to free %u pages"),
pReq->cPages);
}
/**
* Changes the halt method.
*
* @returns VBox status code.
* @param pUVM Pointer to the user mode VM structure.
* @param enmHaltMethod The new halt method.
* @thread EMT.
*/
int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod)
{
PVM pVM = pUVM->pVM; Assert(pVM);
VM_ASSERT_EMT(pVM);
AssertReturn(enmHaltMethod > VMHALTMETHOD_INVALID && enmHaltMethod < VMHALTMETHOD_END, VERR_INVALID_PARAMETER);
/*
* Resolve default (can be overridden in the configuration).
*/
if (enmHaltMethod == VMHALTMETHOD_DEFAULT)
{
uint32_t u32;
int rc = CFGMR3QueryU32(CFGMR3GetChild(CFGMR3GetRoot(pVM), "VM"), "HaltMethod", &u32);
if (RT_SUCCESS(rc))
{
enmHaltMethod = (VMHALTMETHOD)u32;
if (enmHaltMethod <= VMHALTMETHOD_INVALID || enmHaltMethod >= VMHALTMETHOD_END)
return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Invalid VM/HaltMethod value %d"), enmHaltMethod);
}
else if (rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_CHILD_NOT_FOUND)
return VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to Query VM/HaltMethod as uint32_t"));
else
enmHaltMethod = VMHALTMETHOD_GLOBAL_1;
//enmHaltMethod = VMHALTMETHOD_1;
//enmHaltMethod = VMHALTMETHOD_OLD;
}
LogRel(("VM: Halt method %s (%d)\n", vmR3GetHaltMethodName(enmHaltMethod), enmHaltMethod));
/*
* Find the descriptor.
*/
unsigned i = 0;
while ( i < RT_ELEMENTS(g_aHaltMethods)
&& g_aHaltMethods[i].enmHaltMethod != enmHaltMethod)
i++;
AssertReturn(i < RT_ELEMENTS(g_aHaltMethods), VERR_INVALID_PARAMETER);
/*
* This needs to be done while the other EMTs are not sleeping or otherwise messing around.
*/
return VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, vmR3SetHaltMethodCallback, (void *)(uintptr_t)i);
}
/**
* Allocates a page from the page pool.
*
* @returns Pointer to allocated page(s).
* @returns NULL on failure.
* @param pPool Pointer to the page pool.
* @thread The Emulation Thread.
*/
DECLINLINE(void *) mmR3PagePoolAlloc(PMMPAGEPOOL pPool)
{
VM_ASSERT_EMT(pPool->pVM);
STAM_COUNTER_INC(&pPool->cAllocCalls);
/*
* Walk free list.
*/
if (pPool->pHeadFree)
{
PMMPAGESUBPOOL pSub = pPool->pHeadFree;
/* decrement free count and unlink if no more free entries. */
if (!--pSub->cPagesFree)
pPool->pHeadFree = pSub->pNextFree;
#ifdef VBOX_WITH_STATISTICS
pPool->cFreePages--;
#endif
/* find free spot in bitmap. */
#ifdef USE_INLINE_ASM_BIT_OPS
const int iPage = ASMBitFirstClear(pSub->auBitmap, pSub->cPages);
if (iPage >= 0)
{
Assert(!ASMBitTest(pSub->auBitmap, iPage));
ASMBitSet(pSub->auBitmap, iPage);
return (uint8_t *)pSub->pvPages + PAGE_SIZE * iPage;
}
#else
unsigned *pu = &pSub->auBitmap[0];
unsigned *puEnd = &pSub->auBitmap[pSub->cPages / (sizeof(pSub->auBitmap) * 8)];
while (pu < puEnd)
{
unsigned u;
if ((u = *pu) != ~0U)
{
unsigned iBit = 0;
unsigned uMask = 1;
while (iBit < sizeof(pSub->auBitmap[0]) * 8)
{
if (!(u & uMask))
{
*pu |= uMask;
return (uint8_t *)pSub->pvPages
+ PAGE_SIZE * (iBit + ((uint8_t *)pu - (uint8_t *)&pSub->auBitmap[0]) * 8);
}
iBit++;
uMask <<= 1;
}
STAM_COUNTER_INC(&pPool->cErrors);
AssertMsgFailed(("how odd, expected to find a free bit in %#x, but didn't\n", u));
}
/* next */
pu++;
}
#endif
STAM_COUNTER_INC(&pPool->cErrors);
#ifdef VBOX_WITH_STATISTICS
pPool->cFreePages++;
#endif
AssertMsgFailed(("how strange, expected to find a free bit in %p, but didn't (%d pages supposed to be free!)\n", pSub, pSub->cPagesFree + 1));
}
/*
* Allocate new subpool.
*/
unsigned cPages = !pPool->fLow ? 128 : 32;
PMMPAGESUBPOOL pSub;
int rc = MMHyperAlloc(pPool->pVM,
RT_OFFSETOF(MMPAGESUBPOOL, auBitmap[cPages / (sizeof(pSub->auBitmap[0]) * 8)])
+ (sizeof(SUPPAGE) + sizeof(MMPPLOOKUPHCPHYS)) * cPages
+ sizeof(MMPPLOOKUPHCPTR),
0,
MM_TAG_MM_PAGE,
(void **)&pSub);
if (RT_FAILURE(rc))
return NULL;
PSUPPAGE paPhysPages = (PSUPPAGE)&pSub->auBitmap[cPages / (sizeof(pSub->auBitmap[0]) * 8)];
Assert((uintptr_t)paPhysPages >= (uintptr_t)&pSub->auBitmap[1]);
if (!pPool->fLow)
{
rc = SUPR3PageAllocEx(cPages,
0 /* fFlags */,
&pSub->pvPages,
NULL,
paPhysPages);
if (RT_FAILURE(rc))
rc = VMSetError(pPool->pVM, rc, RT_SRC_POS,
N_("Failed to lock host %zd bytes of memory (out of memory)"), (size_t)cPages << PAGE_SHIFT);
}
else
rc = SUPR3LowAlloc(cPages, &pSub->pvPages, NULL, paPhysPages);
if (RT_SUCCESS(rc))
{
/*
* Setup the sub structure and allocate the requested page.
*/
pSub->cPages = cPages;
pSub->cPagesFree= cPages - 1;
pSub->paPhysPages = paPhysPages;
memset(pSub->auBitmap, 0, cPages / 8);
/* allocate first page. */
pSub->auBitmap[0] |= 1;
/* link into free chain. */
pSub->pNextFree = pPool->pHeadFree;
pPool->pHeadFree= pSub;
/* link into main chain. */
pSub->pNext = pPool->pHead;
pPool->pHead = pSub;
/* update pool statistics. */
pPool->cSubPools++;
pPool->cPages += cPages;
#ifdef VBOX_WITH_STATISTICS
pPool->cFreePages += cPages - 1;
#endif
/*
* Initialize the physical pages with backpointer to subpool.
*/
unsigned i = cPages;
while (i-- > 0)
{
AssertMsg(paPhysPages[i].Phys && !(paPhysPages[i].Phys & PAGE_OFFSET_MASK),
("i=%d Phys=%d\n", i, paPhysPages[i].Phys));
paPhysPages[i].uReserved = (RTHCUINTPTR)pSub;
}
/*
* Initialize the physical lookup record with backpointers to the physical pages.
*/
PMMPPLOOKUPHCPHYS paLookupPhys = (PMMPPLOOKUPHCPHYS)&paPhysPages[cPages];
i = cPages;
while (i-- > 0)
{
paLookupPhys[i].pPhysPage = &paPhysPages[i];
paLookupPhys[i].Core.Key = paPhysPages[i].Phys;
RTAvlHCPhysInsert(&pPool->pLookupPhys, &paLookupPhys[i].Core);
}
/*
* And the one record for virtual memory lookup.
*/
PMMPPLOOKUPHCPTR pLookupVirt = (PMMPPLOOKUPHCPTR)&paLookupPhys[cPages];
pLookupVirt->pSubPool = pSub;
pLookupVirt->Core.Key = pSub->pvPages;
RTAvlPVInsert(&pPool->pLookupVirt, &pLookupVirt->Core);
/* return allocated page (first). */
return pSub->pvPages;
}
MMHyperFree(pPool->pVM, pSub);
STAM_COUNTER_INC(&pPool->cErrors);
if (pPool->fLow)
VMSetError(pPool->pVM, rc, RT_SRC_POS,
N_("Failed to expand page pool for memory below 4GB. Current size: %d pages"),
pPool->cPages);
AssertMsgFailed(("Failed to expand pool%s. rc=%Rrc poolsize=%d\n",
pPool->fLow ? " (<4GB)" : "", rc, pPool->cPages));
return NULL;
}
