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memory: tune last param of iommu_ops.translate() 

This patch converts the old "is_write" bool into IOMMUAccessFlags. The
difference is that "is_write" can only express either read/write, but
sometimes what we really want is "none" here (neither read nor write).
Replay is an good example - during replay, we should not check any RW
permission bits since thats not an actual IO at all.

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Peter Xu 2017-05-19 11:19:40 +08:00 committed by Michael S. Tsirkin
parent 9964e96dc9
commit bf55b7afce
11 changed files with 22 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
exec.c
View File

@ -486,7 +486,8 @@ static MemoryRegionSection address_space_do_translate(AddressSpace *as,
break;
}
iotlb = mr->iommu_ops->translate(mr, addr, is_write);
iotlb = mr->iommu_ops->translate(mr, addr, is_write ?
IOMMU_WO : IOMMU_RO);
addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
| (addr & iotlb.addr_mask));
*plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1);

2
hw/alpha/typhoon.c
View File

@ -664,7 +664,7 @@ static bool window_translate(TyphoonWindow *win, hwaddr addr,
/* TODO: A translation failure here ought to set PCI error codes on the
Pchip and generate a machine check interrupt. */
static IOMMUTLBEntry typhoon_translate_iommu(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
TyphoonPchip *pchip = container_of(iommu, TyphoonPchip, iommu);
IOMMUTLBEntry ret;

2
hw/dma/rc4030.c
View File

@ -489,7 +489,7 @@ static const MemoryRegionOps jazzio_ops = {
};
static IOMMUTLBEntry rc4030_dma_translate(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
rc4030State *s = container_of(iommu, rc4030State, dma_mr);
IOMMUTLBEntry ret = {

4
hw/i386/amd_iommu.c
View File

@ -988,7 +988,7 @@ static inline bool amdvi_is_interrupt_addr(hwaddr addr)
}
static IOMMUTLBEntry amdvi_translate(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
AMDVIAddressSpace *as = container_of(iommu, AMDVIAddressSpace, iommu);
AMDVIState *s = as->iommu_state;
@ -1017,7 +1017,7 @@ static IOMMUTLBEntry amdvi_translate(MemoryRegion *iommu, hwaddr addr,
return ret;
}
amdvi_do_translate(as, addr, is_write, &ret);
amdvi_do_translate(as, addr, flag & IOMMU_WO, &ret);
trace_amdvi_translation_result(as->bus_num, PCI_SLOT(as->devfn),
PCI_FUNC(as->devfn), addr, ret.translated_addr);
return ret;

4
hw/i386/intel_iommu.c
View File

@ -2221,7 +2221,7 @@ static void vtd_mem_write(void *opaque, hwaddr addr,
}
static IOMMUTLBEntry vtd_iommu_translate(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu);
IntelIOMMUState *s = vtd_as->iommu_state;
@ -2243,7 +2243,7 @@ static IOMMUTLBEntry vtd_iommu_translate(MemoryRegion *iommu, hwaddr addr,
}
vtd_do_iommu_translate(vtd_as, vtd_as->bus, vtd_as->devfn, addr,
is_write, &ret);
flag & IOMMU_WO, &ret);
VTD_DPRINTF(MMU,
"bus %"PRIu8 " slot %"PRIu8 " func %"PRIu8 " devfn %"PRIu8
" iova 0x%"PRIx64 " hpa 0x%"PRIx64, pci_bus_num(vtd_as->bus),

2
hw/pci-host/apb.c
View File

@ -209,7 +209,7 @@ static AddressSpace *pbm_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
/* Called from RCU critical section */
static IOMMUTLBEntry pbm_translate_iommu(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
IOMMUState *is = container_of(iommu, IOMMUState, iommu);
hwaddr baseaddr, offset;

2
hw/ppc/spapr_iommu.c
View File

@ -111,7 +111,7 @@ static void spapr_tce_free_table(uint64_t *table, int fd, uint32_t nb_table)
/* Called from RCU critical section */
static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu);
uint64_t tce;

2
hw/s390x/s390-pci-bus.c
View File

@ -357,7 +357,7 @@ out:
}
static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *mr, hwaddr addr,
bool is_write)
IOMMUAccessFlags flag)
{
uint64_t pte;
uint32_t flags;

2
hw/s390x/s390-pci-inst.c
View File

@ -624,7 +624,7 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
mr = &iommu->iommu_mr;
while (start < end) {
entry = mr->iommu_ops->translate(mr, start, 0);
entry = mr->iommu_ops->translate(mr, start, IOMMU_NONE);
if (!entry.translated_addr) {
pbdev->state = ZPCI_FS_ERROR;

10
include/exec/memory.h
View File

@ -185,8 +185,14 @@ struct MemoryRegionOps {
typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps;
struct MemoryRegionIOMMUOps {
/* Return a TLB entry that contains a given address. */
IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write);
/*
* Return a TLB entry that contains a given address. Flag should
* be the access permission of this translation operation. We can
* set flag to IOMMU_NONE to mean that we don't need any
* read/write permission checks, like, when for region replay.
*/
IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr,
IOMMUAccessFlags flag);
/* Returns minimum supported page size */
uint64_t (*get_min_page_size)(MemoryRegion *iommu);
/* Called when IOMMU Notifier flag changed */

3
memory.c
View File

@ -1625,6 +1625,7 @@ void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
{
hwaddr addr, granularity;
IOMMUTLBEntry iotlb;
IOMMUAccessFlags flag = is_write ? IOMMU_WO : IOMMU_RO;
/* If the IOMMU has its own replay callback, override */
if (mr->iommu_ops->replay) {
@ -1635,7 +1636,7 @@ void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
granularity = memory_region_iommu_get_min_page_size(mr);
for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
iotlb = mr->iommu_ops->translate(mr, addr, is_write);
iotlb = mr->iommu_ops->translate(mr, addr, flag);
if (iotlb.perm != IOMMU_NONE) {
n->notify(n, &iotlb);
}