VMMRCTestTestWriteMsr(PVM pVM, uint32_t uMsr, uint32_t u32ValueLow, uint32_t u32ValueHi,
uint64_t *puValueBefore, uint64_t *puValueAfter)
{
AssertPtrReturn(puValueBefore, VERR_INVALID_POINTER);
AssertPtrReturn(puValueAfter, VERR_INVALID_POINTER);
ASMIntDisable();
RT_NOREF_PV(pVM);
int rc = VINF_SUCCESS;
uint64_t uValueBefore = UINT64_MAX;
uint64_t uValueAfter = UINT64_MAX;
if (vmmRCSafeMsrRead(uMsr, &uValueBefore))
{
if (!vmmRCSafeMsrWrite(uMsr, RT_MAKE_U64(u32ValueLow, u32ValueHi)))
rc = VERR_WRITE_PROTECT;
if (!vmmRCSafeMsrRead(uMsr, &uValueAfter) && RT_SUCCESS(rc))
rc = VERR_READ_ERROR;
vmmRCSafeMsrWrite(uMsr, uValueBefore);
}
else
rc = VERR_ACCESS_DENIED;
*puValueBefore = uValueBefore;
*puValueAfter = uValueAfter;
return rc;
}
VMMRCTestReadMsrs(PVM pVM, uint32_t uMsr, uint32_t cMsrs, PVMMTESTMSRENTRY paResults)
{
AssertReturn(cMsrs <= 16384, VERR_INVALID_PARAMETER);
AssertPtrReturn(paResults, VERR_INVALID_POINTER);
ASMIntEnable(); /* Run with interrupts enabled, so we can query more MSRs in one block. */
for (uint32_t i = 0; i < cMsrs; i++, uMsr++)
{
if (vmmRCSafeMsrRead(uMsr, &paResults[i].uValue))
paResults[i].uMsr = uMsr;
else
paResults[i].uMsr = UINT64_MAX;
}
ASMIntDisable();
return VINF_SUCCESS;
}
