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spapr_iommu: Introduce page_shift in sPAPRTCETable 

At the moment only 4K pages are supported by sPAPRTCETable. Since sPAPR
spec allows other page sizes and we are going to implement them, we need
page size to be configrable.

This adds @page_shift into sPAPRTCETable and replaces SPAPR_TCE_PAGE_SHIFT
with it where it is possible.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
master
Alexey Kardashevskiy 2014-05-27 15:36:36 +10:00 committed by Alexander Graf
parent 523e7b8ab8
commit 650f33adbd
4 changed files with 49 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
hw/ppc/spapr_iommu.c
View File

@ -35,6 +35,9 @@ enum sPAPRTCEAccess {
SPAPR_TCE_RW = 3,
};
#define IOMMU_PAGE_SIZE(shift) (1ULL << (shift))
#define IOMMU_PAGE_MASK(shift) (~(IOMMU_PAGE_SIZE(shift) - 1))
static QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables;
static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn)
@ -70,12 +73,14 @@ static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr)
if (tcet->bypass) {
ret.perm = IOMMU_RW;
} else if ((addr >> SPAPR_TCE_PAGE_SHIFT) < tcet->nb_table) {
} else if ((addr >> tcet->page_shift) < tcet->nb_table) {
/* Check if we are in bound */
tce = tcet->table[addr >> SPAPR_TCE_PAGE_SHIFT];
ret.iova = addr & ~SPAPR_TCE_PAGE_MASK;
ret.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK;
ret.addr_mask = SPAPR_TCE_PAGE_MASK;
hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
tce = tcet->table[addr >> tcet->page_shift];
ret.iova = addr & page_mask;
ret.translated_addr = tce & page_mask;
ret.addr_mask = ~page_mask;
ret.perm = tce;
}
trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm,
@ -112,7 +117,7 @@ static int spapr_tce_table_realize(DeviceState *dev)
if (kvm_enabled()) {
tcet->table = kvmppc_create_spapr_tce(tcet->liobn,
tcet->nb_table <<
SPAPR_TCE_PAGE_SHIFT,
tcet->page_shift,
&tcet->fd);
}
@ -135,6 +140,7 @@ static int spapr_tce_table_realize(DeviceState *dev)
}
sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn,
uint32_t page_shift,
uint32_t nb_table)
{
sPAPRTCETable *tcet;
@ -151,6 +157,7 @@ sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn,
tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE));
tcet->liobn = liobn;
tcet->page_shift = page_shift;
tcet->nb_table = nb_table;
object_property_add_child(OBJECT(owner), "tce-table", OBJECT(tcet), NULL);
@ -196,19 +203,20 @@ static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba,
target_ulong tce)
{
IOMMUTLBEntry entry;
hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
if ((ioba >> SPAPR_TCE_PAGE_SHIFT) >= tcet->nb_table) {
if ((ioba >> tcet->page_shift) >= tcet->nb_table) {
hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x"
TARGET_FMT_lx "\n", ioba);
return H_PARAMETER;
}
tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT] = tce;
tcet->table[ioba >> tcet->page_shift] = tce;
entry.target_as = &address_space_memory,
entry.iova = ioba & ~SPAPR_TCE_PAGE_MASK;
entry.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK;
entry.addr_mask = SPAPR_TCE_PAGE_MASK;
entry.iova = ioba & page_mask;
entry.translated_addr = tce & page_mask;
entry.addr_mask = ~page_mask;
entry.perm = tce;
memory_region_notify_iommu(&tcet->iommu, entry);
@ -228,21 +236,25 @@ static target_ulong h_put_tce_indirect(PowerPCCPU *cpu,
target_ulong ret = H_PARAMETER;
sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn);
CPUState *cs = CPU(cpu);
hwaddr page_mask, page_size;
if (!tcet) {
return H_PARAMETER;
}
if (npages > 512) {
if ((npages > 512) || (tce_list & SPAPR_TCE_PAGE_MASK)) {
return H_PARAMETER;
}
ioba &= ~SPAPR_TCE_PAGE_MASK;
tce_list &= ~SPAPR_TCE_PAGE_MASK;
page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
ioba &= page_mask;
for (i = 0; i < npages; ++i, ioba += page_size) {
target_ulong off = (tce_list & ~SPAPR_TCE_RW) +
i * sizeof(target_ulong);
target_ulong tce = ldq_phys(cs->as, off);
for (i = 0; i < npages; ++i, ioba += SPAPR_TCE_PAGE_SIZE) {
target_ulong tce = ldq_phys(cs->as, tce_list +
i * sizeof(target_ulong));
ret = put_tce_emu(tcet, ioba, tce);
if (ret) {
break;
@ -269,6 +281,7 @@ static target_ulong h_stuff_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong npages = args[3];
target_ulong ret = H_PARAMETER;
sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn);
hwaddr page_mask, page_size;
if (!tcet) {
return H_PARAMETER;
@ -278,9 +291,11 @@ static target_ulong h_stuff_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
return H_PARAMETER;
}
ioba &= ~SPAPR_TCE_PAGE_MASK;
page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
ioba &= page_mask;
for (i = 0; i < npages; ++i, ioba += SPAPR_TCE_PAGE_SIZE) {
for (i = 0; i < npages; ++i, ioba += page_size) {
ret = put_tce_emu(tcet, ioba, tce_value);
if (ret) {
break;
@ -300,9 +315,11 @@ static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong ret = H_PARAMETER;
sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn);
ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1);
if (tcet) {
hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
ioba &= page_mask;
ret = put_tce_emu(tcet, ioba, tce);
}
trace_spapr_iommu_put(liobn, ioba, tce, ret);
@ -313,13 +330,13 @@ static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
static target_ulong get_tce_emu(sPAPRTCETable *tcet, target_ulong ioba,
target_ulong *tce)
{
if ((ioba >> SPAPR_TCE_PAGE_SHIFT) >= tcet->nb_table) {
if ((ioba >> tcet->page_shift) >= tcet->nb_table) {
hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x"
TARGET_FMT_lx "\n", ioba);
return H_PARAMETER;
}
*tce = tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT];
*tce = tcet->table[ioba >> tcet->page_shift];
return H_SUCCESS;
}
@ -333,9 +350,11 @@ static target_ulong h_get_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong ret = H_PARAMETER;
sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn);
ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1);
if (tcet) {
hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
ioba &= page_mask;
ret = get_tce_emu(tcet, ioba, &tce);
if (!ret) {
args[0] = tce;
@ -384,7 +403,7 @@ int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
}
return spapr_dma_dt(fdt, node_off, propname,
tcet->liobn, 0, tcet->nb_table << SPAPR_TCE_PAGE_SHIFT);
tcet->liobn, 0, tcet->nb_table << tcet->page_shift);
}
static void spapr_tce_table_class_init(ObjectClass *klass, void *data)

1
hw/ppc/spapr_pci.c
View File

@ -656,6 +656,7 @@ static void spapr_phb_finish_realize(sPAPRPHBState *sphb, Error **errp)
sPAPRTCETable *tcet;
tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn,
SPAPR_TCE_PAGE_SHIFT,
0x40000000 >> SPAPR_TCE_PAGE_SHIFT);
if (!tcet) {
error_setg(errp, "Unable to create TCE table for %s",

1
hw/ppc/spapr_vio.c
View File

@ -457,6 +457,7 @@ static int spapr_vio_busdev_init(DeviceState *qdev)
if (pc->rtce_window_size) {
uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
dev->tcet = spapr_tce_new_table(qdev, liobn,
SPAPR_TCE_PAGE_SHIFT,
pc->rtce_window_size >>
SPAPR_TCE_PAGE_SHIFT);
address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet), qdev->id);

2
include/hw/ppc/spapr.h
View File

@ -398,6 +398,7 @@ struct sPAPRTCETable {
DeviceState parent;
uint32_t liobn;
uint32_t nb_table;
uint32_t page_shift;
uint64_t *table;
bool bypass;
int fd;
@ -409,6 +410,7 @@ void spapr_events_init(sPAPREnvironment *spapr);
void spapr_events_fdt_skel(void *fdt, uint32_t epow_irq);
int spapr_h_cas_compose_response(target_ulong addr, target_ulong size);
sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn,
uint32_t page_shift,
uint32_t nb_table);
MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet);
void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass);