/**
* Process raw-mode specific forced actions.
*
* This function is called when any FFs in the VM_FF_HIGH_PRIORITY_PRE_RAW_MASK is pending.
*
* @returns VBox status code. May return VINF_EM_NO_MEMORY but none of the other
* EM statuses.
* @param pVM The cross context VM structure.
* @param pVCpu The cross context virtual CPU structure.
* @param pCtx Pointer to the guest CPU context.
*/
static int emR3HmForcedActions(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx)
{
/*
* Sync page directory.
*/
if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL))
{
Assert(pVCpu->em.s.enmState != EMSTATE_WAIT_SIPI);
int rc = PGMSyncCR3(pVCpu, pCtx->cr0, pCtx->cr3, pCtx->cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
if (RT_FAILURE(rc))
return rc;
#ifdef VBOX_WITH_RAW_MODE
Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT));
#endif
/* Prefetch pages for EIP and ESP. */
/** @todo This is rather expensive. Should investigate if it really helps at all. */
rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_CS, CPUMCTX2CORE(pCtx), pCtx->rip));
if (rc == VINF_SUCCESS)
rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_SS, CPUMCTX2CORE(pCtx), pCtx->rsp));
if (rc != VINF_SUCCESS)
{
if (rc != VINF_PGM_SYNC_CR3)
{
AssertLogRelMsgReturn(RT_FAILURE(rc), ("%Rrc\n", rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
return rc;
}
rc = PGMSyncCR3(pVCpu, pCtx->cr0, pCtx->cr3, pCtx->cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
if (RT_FAILURE(rc))
return rc;
}
/** @todo maybe prefetch the supervisor stack page as well */
#ifdef VBOX_WITH_RAW_MODE
Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT));
#endif
}
/*
* Allocate handy pages (just in case the above actions have consumed some pages).
*/
if (VM_FF_IS_PENDING_EXCEPT(pVM, VM_FF_PGM_NEED_HANDY_PAGES, VM_FF_PGM_NO_MEMORY))
{
int rc = PGMR3PhysAllocateHandyPages(pVM);
if (RT_FAILURE(rc))
return rc;
}
/*
* Check whether we're out of memory now.
*
* This may stem from some of the above actions or operations that has been executed
* since we ran FFs. The allocate handy pages must for instance always be followed by
* this check.
*/
if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
return VINF_EM_NO_MEMORY;
return VINF_SUCCESS;
}
/**
* Read wrapper used by selmRCGuestTSSWriteHandler.
* @returns VBox status code (appropriate for trap handling and GC return).
* @param pVM The VM handle
* @param pvDst Where to put the bits we read.
* @param pvSrc Guest address to read from.
* @param cb The number of bytes to read.
*/
DECLINLINE(int) selmRCReadTssBits(PVM pVM, void *pvDst, void const *pvSrc, size_t cb)
{
PVMCPU pVCpu = VMMGetCpu0(pVM);
int rc = MMGCRamRead(pVM, pvDst, (void *)pvSrc, cb);
if (RT_SUCCESS(rc))
return VINF_SUCCESS;
/** @todo use different fallback? */
rc = PGMPrefetchPage(pVCpu, (uintptr_t)pvSrc);
AssertMsg(rc == VINF_SUCCESS, ("PGMPrefetchPage %p failed with %Rrc\n", &pvSrc, rc));
if (rc == VINF_SUCCESS)
{
rc = MMGCRamRead(pVM, pvDst, (void *)pvSrc, cb);
AssertMsg(rc == VINF_SUCCESS, ("MMGCRamRead %p failed with %Rrc\n", &pvSrc, rc));
}
return rc;
}
