/**
* Rendezvous callback that will be called once.
*
* @returns VBox strict status code.
* @param pVM Pointer to the VM.
* @param pVCpu Pointer to the VMCPU of the calling EMT.
* @param pvUser Pointer to a VMCPUID with the requester's ID.
*/
static DECLCALLBACK(VBOXSTRICTRC) pgmR3SharedModuleRegRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
{
VMCPUID idCpu = *(VMCPUID *)pvUser;
/* Execute on the VCPU that issued the original request to make sure we're in the right cr3 context. */
if (pVCpu->idCpu != idCpu)
{
Assert(pVM->cCpus > 1);
return VINF_SUCCESS;
}
/* Flush all pending handy page operations before changing any shared page assignments. */
int rc = PGMR3PhysAllocateHandyPages(pVM);
AssertRC(rc);
/*
* Lock it here as we can't deal with busy locks in this ring-0 path.
*/
LogFlow(("pgmR3SharedModuleRegRendezvous: start (%d)\n", pVM->pgm.s.cSharedPages));
pgmLock(pVM);
pgmR3PhysAssertSharedPageChecksums(pVM);
rc = GMMR3CheckSharedModules(pVM);
pgmR3PhysAssertSharedPageChecksums(pVM);
pgmUnlock(pVM);
AssertLogRelRC(rc);
LogFlow(("pgmR3SharedModuleRegRendezvous: done (%d)\n", pVM->pgm.s.cSharedPages));
return rc;
}
/**
* Updates the physical page access handlers.
*
* @param pVM Pointer to the VM.
* @remark Only used when restoring a saved state.
*/
void pgmR3HandlerPhysicalUpdateAll(PVM pVM)
{
LogFlow(("pgmHandlerPhysicalUpdateAll:\n"));
/*
* Clear and set.
* (the right -> left on the setting pass is just bird speculating on cache hits)
*/
pgmLock(pVM);
RTAvlroGCPhysDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, true, pgmR3HandlerPhysicalOneClear, pVM);
RTAvlroGCPhysDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, false, pgmR3HandlerPhysicalOneSet, pVM);
pgmUnlock(pVM);
}
/**
* The '.pgmsharedmodules' command.
*
* @returns VBox status.
* @param pCmd Pointer to the command descriptor (as registered).
* @param pCmdHlp Pointer to command helper functions.
* @param pVM Pointer to the current VM (if any).
* @param paArgs Pointer to (readonly) array of arguments.
* @param cArgs Number of arguments in the array.
*/
DECLCALLBACK(int) pgmR3CmdShowSharedModules(PCDBGCCMD pCmd, PDBGCCMDHLP pCmdHlp, PVM pVM, PCDBGCVAR paArgs, unsigned cArgs)
{
NOREF(pCmd); NOREF(paArgs); NOREF(cArgs);
pgmLock(pVM);
for (unsigned i = 0; i < RT_ELEMENTS(g_apSharedModules); i++)
{
if (g_apSharedModules[i])
{
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Shared module %s (%s):\n", g_apSharedModules[i]->szName, g_apSharedModules[i]->szVersion);
for (unsigned j = 0; j < g_apSharedModules[i]->cRegions; j++)
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "--- Region %d: base %RGv size %x\n", j, g_apSharedModules[i]->aRegions[j].GCRegionAddr, g_apSharedModules[i]->aRegions[j].cbRegion);
}
}
pgmUnlock(pVM);
return VINF_SUCCESS;
}
/**
* Query the state of a page in a shared module
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
* @param GCPtrPage Page address.
* @param pfShared Shared status (out).
* @param pfPageFlags Page flags (out).
*/
VMMR3DECL(int) PGMR3SharedModuleGetPageState(PVM pVM, RTGCPTR GCPtrPage, bool *pfShared, uint64_t *pfPageFlags)
{
/* Debug only API for the page fusion testcase. */
RTGCPHYS GCPhys;
uint64_t fFlags;
pgmLock(pVM);
int rc = PGMGstGetPage(VMMGetCpu(pVM), GCPtrPage, &fFlags, &GCPhys);
switch (rc)
{
case VINF_SUCCESS:
{
PPGMPAGE pPage = pgmPhysGetPage(pVM, GCPhys);
if (pPage)
{
*pfShared = PGM_PAGE_IS_SHARED(pPage);
*pfPageFlags = fFlags;
}
else
rc = VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
break;
}
case VERR_PAGE_NOT_PRESENT:
case VERR_PAGE_TABLE_NOT_PRESENT:
case VERR_PAGE_MAP_LEVEL4_NOT_PRESENT:
case VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT:
*pfShared = false;
*pfPageFlags = 0;
rc = VINF_SUCCESS;
break;
default:
break;
}
pgmUnlock(pVM);
return rc;
}
/**
* @callback_method_impl{FNDBGCCMD, The '.pgmcheckduppages' command.}
*/
DECLCALLBACK(int) pgmR3CmdCheckDuplicatePages(PCDBGCCMD pCmd, PDBGCCMDHLP pCmdHlp, PUVM pUVM, PCDBGCVAR paArgs, unsigned cArgs)
{
unsigned cBallooned = 0;
unsigned cShared = 0;
unsigned cZero = 0;
unsigned cUnique = 0;
unsigned cDuplicate = 0;
unsigned cAllocZero = 0;
unsigned cPages = 0;
NOREF(pCmd); NOREF(paArgs); NOREF(cArgs);
PVM pVM = pUVM->pVM;
VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
pgmLock(pVM);
for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
{
PPGMPAGE pPage = &pRam->aPages[0];
RTGCPHYS GCPhys = pRam->GCPhys;
uint32_t cLeft = pRam->cb >> PAGE_SHIFT;
while (cLeft-- > 0)
{
if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM)
{
switch (PGM_PAGE_GET_STATE(pPage))
{
case PGM_PAGE_STATE_ZERO:
cZero++;
break;
case PGM_PAGE_STATE_BALLOONED:
cBallooned++;
break;
case PGM_PAGE_STATE_SHARED:
cShared++;
break;
case PGM_PAGE_STATE_ALLOCATED:
case PGM_PAGE_STATE_WRITE_MONITORED:
{
/* Check if the page was allocated, but completely zero. */
PGMPAGEMAPLOCK PgMpLck;
const void *pvPage;
int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, pPage, GCPhys, &pvPage, &PgMpLck);
if ( RT_SUCCESS(rc)
&& ASMMemIsZeroPage(pvPage))
cAllocZero++;
else if (GMMR3IsDuplicatePage(pVM, PGM_PAGE_GET_PAGEID(pPage)))
cDuplicate++;
else
cUnique++;
if (RT_SUCCESS(rc))
pgmPhysReleaseInternalPageMappingLock(pVM, &PgMpLck);
break;
}
default:
AssertFailed();
break;
}
}
/* next */
pPage++;
GCPhys += PAGE_SIZE;
cPages++;
/* Give some feedback for every processed megabyte. */
if ((cPages & 0x7f) == 0)
pCmdHlp->pfnPrintf(pCmdHlp, NULL, ".");
}
}
pgmUnlock(pVM);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "\nNumber of zero pages %08x (%d MB)\n", cZero, cZero / 256);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Number of alloczero pages %08x (%d MB)\n", cAllocZero, cAllocZero / 256);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Number of ballooned pages %08x (%d MB)\n", cBallooned, cBallooned / 256);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Number of shared pages %08x (%d MB)\n", cShared, cShared / 256);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Number of unique pages %08x (%d MB)\n", cUnique, cUnique / 256);
pCmdHlp->pfnPrintf(pCmdHlp, NULL, "Number of duplicate pages %08x (%d MB)\n", cDuplicate, cDuplicate / 256);
return VINF_SUCCESS;
}