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Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU
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From: |
Michael S. Tsirkin |
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Subject: |
Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU |
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Date: |
Wed, 9 Sep 2015 10:59:39 +0300 |
On Wed, Sep 09, 2015 at 12:45:10PM +0500, Valentine Sinitsyn wrote:
> On 09.09.2015 12:30, David kiarie wrote:
> ...snip...
>
> >>>+static void amd_iommu_cmdbuf_exec(AMDIOMMUState *s)
> >>>+{
> >>>+ unsigned type;
> >>>+ uint8_t cmd[IOMMU_COMMAND_SIZE];
> >>>+
> >>>+ IOMMU_DPRINTF(COMMAND, "");
> >>>+ memset(cmd, 0, IOMMU_COMMAND_SIZE);
> >>>+
> >>>+ if(dma_memory_read(&address_space_memory, s->cmdbuf + s->cmdbuf_head,
> >>>cmd, IOMMU_COMMAND_SIZE)){
> >>>+ IOMMU_DPRINTF(COMMAND, "error: fail to access memory at
> >>>0x%"PRIx64
> >>>+ " + %"PRIu8, s->cmdbuf, s->cmdbuf_head);
> >>>+ }
> >>>+
> >>>+ type = cmd[CMDBUF_ID_BYTE] >> CMDBUF_ID_RSHIFT;
> >>>+
> >>>+ switch(type){
> >>>+ case CMD_COMPLETION_WAIT:
> >>>+ /* pretend to wait for command execution to complete */
> >>>+ IOMMU_DPRINTF(COMMAND, "completion wait requested");
> >>>+ amd_iommu_completion_wait(s, cmd);
> >>>+ break;
> >>>+ case CMD_INVAL_DEVTAB_ENTRY:
> >>>+ /* Not implemented yet - should just clear device table
> >>>contents */
> >>>+ IOMMU_DPRINTF(COMMAND, "device table entries invalidated");
> >>
> >>Better make it clear that these commands are not implemented yet. An IOMMU
> >>is hardly usable without invalidators.
> >
> >I think the "debug prinft" here is misleading. AFAIK, the commands
> >listed here(there are others which I haven't listed) relate to 'cache'
> >which means this commands do nothing in the absence of cache.
> >
> >The reason why I advertise 'cache' is because the linux driver checks
> >for cache and other optional features to determine the IOMMU version
> >whereby versions 2 of IOMMU are assummed to support this features.
> Did you check how address translation is emulated in QEMU. I didn't :) But
> you return IOMMTLBEntry from your translation routine, and I'd rather ensure
> it is not cached in some other layer.
>
> Besides, omitting invalidation commands will be a problem on real hardware.
> As IOMMU emulation is mainly useful for debugging, I'd reproduce this
> behaviour in the emulator. I mean, if I forget to do CMD_INVAL_DEVTAB_ENTRY
> in my guest code, things shouldn't work properly.
That's hardly a priority. IOMMU is useful for other things besides
debugging.
> You can just copy all data structures to AMDIOMMUState and use this "cahced"
> copies, updated when you run invalidation commands. But this isn't a #1
> priority, you are right.
>
> Can you share some tests results for this code?
> >
> >>
> >>>+ break;
> >>>+ case CMD_INVAL_IOMMU_PAGES:
> >>>+ /* invalidate IOMMU cache for a particular domain */
> >>>+ IOMMU_DPRINTF(COMMAND, "IOMMU pages invalidated");
> >>>+ break;
> >>>+ case CMD_INVAL_IOTLB_PAGES:
> >>>+ /* Only present if remote IOTLB present */
> >>>+ IOMMU_DPRINTF(COMMAND, "IOTLB pages invalidated");
> >>>+ break;
> >>>+ case CMD_INVAL_INTR_TABLE:
> >>>+ /* no support for interrupt remapping yet */
> >>>+ IOMMU_DPRINTF(COMMAND, "interrupt table invalidated");
> >>>+ break;
> >>>+ default:
> >>>+ IOMMU_DPRINTF(COMMAND, "unhandled command %d", type);
> >>>+ break;
> >>>+ }
> >>>+
> >>>+}
> >>>+
> >>>+static void amd_iommu_cmdbuf_run(AMDIOMMUState *s)
> >>>+{
> >>>+ IOMMU_DPRINTF(COMMAND, "");
> >>>+
> >>>+ uint64_t *mmio_cmdbuf_head = (uint64_t*)s->mmior + MMIO_COMMAND_HEAD;
> >>>+
> >>>+ if(!s->cmdbuf_enabled){
> >>>+ IOMMU_DPRINTF(COMMAND, "Command buffer not enabled");
> >>>+ return;
> >>>+ }
> >>>+
> >>>+ while(s->cmdbuf_head != s->cmdbuf_tail) {
> >>>+ /* check if there is work to do. */
> >>>+ IOMMU_DPRINTF(COMMAND, "COMMAND BUFFER head at %x COMMAND BUFFER
> >>>tail at %x",
> >>>+ s->cmdbuf_head, s->cmdbuf_tail);
> >>>+ amd_iommu_cmdbuf_exec(s);
> >>>+ s->cmdbuf_head += CMDBUF_ENTRY_SIZE;
> >>>+
> >>>+ /* wrap head pointer */
> >>>+ if (s->cmdbuf_head >= s->cmdbuf_len * CMDBUF_ENTRY_SIZE) {
> >>>+ s->cmdbuf_head = 0;
> >>>+ }
> >>>+ }
> >>>+
> >>>+ *mmio_cmdbuf_head = cpu_to_le64(s->cmdbuf_head);
> >>>+}
> >>>+
> >>>+/* System Software might never read from some of this fields but anyways
> >>>*/
> >>>+static uint64_t amd_iommu_mmio_read(void *opaque, hwaddr addr, unsigned
> >>>size)
> >>>+{
> >>>+ AMDIOMMUState *s = opaque;
> >>>+
> >>>+ uint64_t val = -1;
> >>>+ if(addr + size > MMIO_SIZE) {
> >>>+ IOMMU_DPRINTF(MMIO, "error: addr outside region: max 0x%"PRIX64
> >>>+ ", got 0x%"PRIx64 " %d",
> >>>+ (uint64_t)MMIO_SIZE, addr, size);
> >>>+ return (uint64_t) - 1;
> >>>+ }
> >>>+
> >>>+ switch(addr & ~0x07){
> >>>+ case MMIO_DEVICE_TABLE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_DEVICE_TABLE read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>
> >>What makes these cases different, except debug printf()s? Maybe leave
> >>printf()s inside the switch, and factor out the rest. This applies to other
> >>similar cases as well.
> >>
> >>
> >>>+
> >>>+ case MMIO_COMMAND_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_BASE read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EVENT_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_BASE read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_CONTROL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_CONTROL read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EXCL_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EXCL_BASE read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EXCL_LIMIT:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EXCL_LIMIT read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_COMMAND_HEAD:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_HEAD read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_COMMAND_TAIL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_TAIL read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EVENT_HEAD:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_HEAD read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EVENT_TAIL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_TAIL read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_STATUS:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_STATUS read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EXT_FEATURES:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EXT_FEATURES read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ if(size == 2){
> >>>+ val = amd_iommu_readw(s, addr);
> >>>+ } else if(size == 4){
> >>>+ val = amd_iommu_readl(s, addr);
> >>>+ }
> >>>+ else if(size == 8){
> >>>+ val = amd_iommu_readq(s, addr);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ default:
> >>>+ IOMMU_DPRINTF(MMIO, "UNHANDLED MMIO read addr 0x%"PRIx64
> >>>+ ", size %d offset 0x%"PRIx64, addr, size,
> >>>offset);
> >>>+ }
> >>>+
> >>>+ return val;
> >>>+}
> >>>+
> >>>+static void iommu_handle_control_write(AMDIOMMUState *s)
> >>>+{
> >>>+ /* read whatever is already written incase software is writing in
> >>>chucks less than 8 bytes */
> >>>+ unsigned long control = amd_iommu_readq(s, MMIO_CONTROL);
> >>>+ s->enabled = !!(control & MMIO_CONTROL_IOMMUEN);
> >>>+
> >>>+ s->ats_enabled = !!(control & MMIO_CONTROL_HTTUNEN);
> >>>+ s->evtlog_enabled = s->enabled && !!(control &
> >>>MMIO_CONTROL_EVENTLOGEN);
> >>>+
> >>>+ s->evtlog_intr = !!(control & MMIO_CONTROL_EVENTINTEN);
> >>>+ s->completion_wait_intr = !!(control & MMIO_CONTROL_COMWAITINTEN);
> >>>+ s->cmdbuf_enabled = s->enabled && !!(control &
> >>>MMIO_CONTROL_CMDBUFLEN);
> >>>+
> >>>+ /* update the flags depending on the control register */
> >>>+ if(s->cmdbuf_enabled) {
> >>>+ (*(uint64_t*)&s->mmior[MMIO_STATUS]) |= MMIO_STATUS_CMDBUF_RUN;
> >>>+ } else {
> >>>+ (*(uint64_t*)&s->mmior[MMIO_STATUS]) &= ~MMIO_STATUS_CMDBUF_RUN;
> >>>+ }
> >>>+ if (s->evtlog_enabled) {
> >>>+ (*(uint64_t*)&s->mmior[MMIO_STATUS]) |= MMIO_STATUS_EVTLOG_RUN;
> >>>+ } else {
> >>>+ (*(uint64_t*)&s->mmior[MMIO_STATUS]) &= ~MMIO_STATUS_EVTLOG_RUN;
> >>>+ }
> >>>+
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_STATUS state 0x%"PRIx64, control);
> >>>+
> >>>+ amd_iommu_cmdbuf_run(s);
> >>
> >>Does any write to control register result in draining command buffer? To me,
> >>it looks strange, and I'd expect IOMMU to execute commands only if I change
> >>tail pointer.
> >>
> >>
> >>>+}
> >>>+
> >>>+/* FIXME: something might go wrong if System Software writes in chunks
> >>>+ * of one byte but linux writes in chunks of 4 bytes so currently it
> >>>+ * works correctly with linux but will definitely be busted if software
> >>>+ * reads/writes 8 bytes
> >>>+ */
> >>>+static void amd_iommu_mmio_write(void *opaque, hwaddr addr, uint64_t val,
> >>>unsigned size)
> >>>+{
> >>>+
> >>>+ AMDIOMMUState *s = opaque;
> >>>+ unsigned long offset = addr & 0x07;
> >>>+
> >>>+ if(addr + size > MMIO_SIZE) {
> >>>+ IOMMU_DPRINTF(MMIO, "error: addr outside region: max 0x%"PRIx64
> >>>+ ", got 0x%"PRIx64 " %d",
> >>>+ (uint64_t)MMIO_SIZE, addr, size);
> >>>+ return;
> >>>+ }
> >>>+
> >>>+ switch(addr & ~0x07){
> >>>+ case MMIO_CONTROL:
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_CONTROL write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset 0x%"PRIx64
> >>>, addr, size, val, offset);
> >>>+ iommu_handle_control_write(s);
> >>>+ break;
> >>>+
> >>>+ case MMIO_DEVICE_TABLE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_DEVICE_TABLE write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+
> >>>+ /* set device table address
> >>>+ * This also suffers from inability to tell whether software
> >>>is done writing
> >>>+ */
> >>>+ if(offset || (size == 8)){
> >>>+ unsigned long device_base = amd_iommu_readq(s,
> >>>MMIO_DEVICE_TABLE);
> >>>+ s->devtab = (dma_addr_t)(device_base &
> >>>MMIO_CMDBUF_BASE_MASK);
> >>>+ /* set device table length */
> >>>+ s->devtab_len = ((device_base & MMIO_DEVTAB_SIZE_MASK) +
> >>>1) * (MMIO_DEVTAB_SIZE_UNIT /
> >>>+ MMIO_DEVTAB_ENTRY_SIZE);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_COMMAND_HEAD:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_HEAD write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ s->cmdbuf_head = val & MMIO_CMDBUF_HEAD_MASK;
> >>>+ amd_iommu_cmdbuf_run(s);
> >>>+ break;
> >>>+
> >>>+ case MMIO_COMMAND_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_BASE write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+
> >>>+ /* FIXME - make sure System Software has finished writing
> >>>incase it writes
> >>>+ * in chucks less than 8 bytes in a robust way.As for now,
> >>>this hacks works
> >>>+ * for the linux driver
> >>>+ */
> >>>+ if(offset || (size == 8)){
> >>>+ unsigned long command_base = amd_iommu_readq(s,
> >>>MMIO_COMMAND_BASE);
> >>>+ s->cmdbuf = (dma_addr_t)(command_base &
> >>>MMIO_CMDBUF_BASE_MASK);
> >>>+ s->cmdbuf_len = 1UL << (s->mmior[MMIO_CMDBUF_SIZE_BYTE] &
> >>>MMIO_CMDBUF_SIZE_MASK);
> >>>+ s->cmdbuf_head = s->cmdbuf_tail = 0;
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_COMMAND_TAIL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_COMMAND_TAIL write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+
> >>>+ s->cmdbuf_tail = val & MMIO_CMDBUF_TAIL_MASK;
> >>>+ amd_iommu_cmdbuf_run(s);
> >>>+ break;
> >>>+
> >>>+ case MMIO_EVENT_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_BASE write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ s->evtlog = (val & MMIO_EVTLOG_BASE_MASK);
> >>>+ s->evtlog_len = 1UL <<
> >>>(*(uint64_t*)&s->mmior[MMIO_EVTLOG_SIZE_BYTE] & MMIO_EVTLOG_SIZE_MASK);
> >>>+ break;
> >>>+
> >>>+ case MMIO_EXCL_LIMIT:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EXCL_LIMIT write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ s->excl_limit = (val & MMIO_EXCL_LIMIT_MASK) |
> >>>MMIO_EXCL_LIMIT_LOW;
> >>>+ break;
> >>>+ //TODO : Event handling fixes
> >>>+
> >>>+ case MMIO_EVENT_HEAD:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_HEAD write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ case MMIO_EVENT_TAIL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_EVENT_TAIL write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ break;
> >>>+ /* PPR log base - unused for now */
> >>>+ case MMIO_PPR_BASE:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_PPR_BASE write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ break;
> >>>+ /* PPR log head - also unused for now */
> >>>+ case MMIO_PPR_HEAD:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_PPR_HEAD write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ break;
> >>>+ /* PPR log tail - unused for now */
> >>>+ case MMIO_PPR_TAIL:
> >>>+ IOMMU_DPRINTF(MMIO, "MMIO_PPR_TAIL write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ if(size == 2){
> >>>+ amd_iommu_writew(s, addr, val);
> >>>+ } else if(size == 4){
> >>>+ amd_iommu_writel(s, addr, val);
> >>>+ } else if(size == 8){
> >>>+ amd_iommu_writeq(s, addr, val);
> >>>+ }
> >>>+ break;
> >>>+
> >>>+ default:
> >>>+ IOMMU_DPRINTF(MMIO, "UNHANDLED MMIO write addr 0x%"PRIx64
> >>>+ ", size %d, val 0x%"PRIx64 ", offset
> >>>0x%"PRIx64, addr, size, val, offset);
> >>>+ ;
> >>>+ }
> >>>+
> >>>+}
> >>>+
> >>>+static void amd_iommu_log_event(AMDIOMMUState *s, AMDIOMMUEvent *evt)
> >>>+{
> >>>+ /* event logging not enabled */
> >>>+ if(!s->evtlog_enabled || *(uint64_t*)&s->mmior[MMIO_STATUS] |
> >>>MMIO_STATUS_EVTLOG_OF){
> >>>+ return;
> >>>+ }
> >>>+
> >>>+ /* event log buffer full */
> >>>+ if(s->evtlog_tail >= s->evtlog_len) {
> >>>+ *(uint64_t*)&s->mmior[MMIO_STATUS] |= MMIO_STATUS_EVTLOG_OF;
> >>>+ }
> >>>+
> >>>+ if(dma_memory_write(&address_space_memory, s->evtlog_len +
> >>>s->evtlog_tail, &evt, EVENT_LEN)){
> >>>+ //IOMMU_DPRINTF(ELOG, "error: fail to write at address 0%x"PRIu8,
> >>>s->evtlog + s->evtlog_tail);
> >>>+ }
> >>>+
> >>>+ s->evtlog_tail += EVENT_LEN;
> >>>+ *(uint64_t*)&s->mmior[MMIO_STATUS] |= MMIO_STATUS_EVTLOG_INTR;
> >>>+ /* Disable logging if Overflow ? */
> >>
> >>No, the spec details event logging restart procedure. Make sure emulated
> >>IOMMU behaves as described there.
> >>
> >>
> >>>+}
> >>>+
> >>>+static void amd_iommu_page_fault(AMDIOMMUState *s, int devfn, unsigned
> >>>domid, dma_addr_t addr, int present,
> >>>+ int is_write)
> >>>+{
> >>>+ IOMMU_DPRINTF(ELOG, "");
> >>>+
> >>>+ AMDIOMMUEvent evt;
> >>>+ unsigned info;
> >>>+ uint16_t status;
> >>>+
> >>>+ evt.devfn = cpu_to_le16(devfn);
> >>>+ evt.reserved = 0;
> >>>+ evt.domid = cpu_to_le16(domid);
> >>>+ evt.addr = cpu_to_le16(addr);
> >>>+
> >>>+ info = EVENT_IOPF;
> >>>+
> >>>+ if(present) {
> >>>+ info |= EVENT_IOPF_PR;
> >>>+ }
> >>>+
> >>>+ if (is_write) {
> >>>+ info |= EVENT_IOPF_RW;
> >>>+ }
> >>>+
> >>>+ /* log a page fault */
> >>>+ amd_iommu_log_event(s, &evt);
> >>>+
> >>>+ /* Abort the translation */
> >>>+ status = pci_get_word(s->dev.config + PCI_STATUS);
> >>>+ pci_set_word(s->dev.config + PCI_STATUS, status |
> >>>PCI_STATUS_SIG_TARGET_ABORT);
> >>>+}
> >>>+
> >>>+static inline uint64_t amd_iommu_get_perms(uint64_t entry)
> >>>+{
> >>>+ return (entry &(DEV_PERM_READ | DEV_PERM_WRITE)) >> DEV_PERM_SHIFT;
> >>>+}
> >>>+
> >>>+/* FIXME deduplication */
> >>>+AddressSpace *bridge_host_amd_iommu(PCIBus *bus, void *opaque, int devfn)
> >>>+{
> >>>+ AMDIOMMUState *s = opaque;
> >>>+ AMDIOMMUAddressSpace **iommu_as;
> >>>+ int bus_num = pci_bus_num(bus);
> >>>+
> >>>+ /* just in case */
> >>>+ assert(0 <= bus_num && bus_num <= PCI_BUS_MAX);
> >>>+ assert(0 <= devfn && devfn <= PCI_DEVFN_MAX);
> >>>+
> >>>+ iommu_as = s->address_spaces[bus_num];
> >>>+
> >>>+ /* allocate memory during the first run */
> >>>+ if(!iommu_as) {
> >>>+ iommu_as =
> >>>g_malloc0(sizeof(AMDIOMMUAddressSpace*)*PCI_DEVFN_MAX);
> >>>+ s->address_spaces[bus_num] = iommu_as;
> >>>+ }
> >>>+
> >>>+ /* set up IOMMU region */
> >>>+ if(!iommu_as[devfn]){
> >>>+ iommu_as[devfn] = g_malloc0(sizeof(AMDIOMMUAddressSpace));
> >>>+ iommu_as[devfn]->bus_num = (uint8_t)bus_num;
> >>>+ iommu_as[devfn]->devfn = (uint8_t)devfn;
> >>>+ iommu_as[devfn]->iommu_state = s;
> >>>+
> >>>+ memory_region_init_iommu(&iommu_as[devfn]->iommu, OBJECT(s),
> >>>&s->iommu_ops, "amd-iommu", UINT64_MAX);
> >>>+ address_space_init(&iommu_as[devfn]->as, &iommu_as[devfn]->iommu,
> >>>"amd-iommu");
> >>>+ }
> >>>+ return &iommu_as[devfn]->as;
> >>>+}
> >>>+
> >>>+/* validate a page table entry */
> >>>+static bool amd_iommu_validate_pte(uint64_t pte)
> >>>+{
> >>>+ return pte & DEV_VALID && pte & DEV_TRANSLATION_VALID;
> >>
> >>I'd suggest parenthesis here.
> >>
> >>
> >>>+}
> >>>+
> >>>+/* get a device table entry given the device function */
> >>>+static bool amd_iommu_get_dte(AMDIOMMUState *s, int devfn, uint64_t
> >>>*entry)
> >>>+{
> >>>+ /* Could lead to out of range accesses */
> >>>+ assert(0 < devfn && devfn < PCI_DEVFN_MAX);
> >>>+
> >>>+ uint32_t offset = devfn * DEVTAB_ENTRY_SIZE;
> >>>+ if(dma_memory_read(&address_space_memory, s->devtab + offset, entry,
> >>>32)){
> >>>+ IOMMU_DPRINTF(MMU, "error: fail to access Device Entry devtab
> >>>0x%"PRIx64
> >>>+ "offset 0x%"PRIx32, s->devtab, offset);
> >>>+ return false;
> >>>+ }
> >>>+
> >>>+ if(!amd_iommu_validate_pte(entry[0])){
> >>>+ IOMMU_DPRINTF(MMU,
> >>>+ "Pte entry at 0x%"PRIx64" is invalid", entry[0]);
> >>>+ return false;
> >>>+ }
> >>>+
> >>>+ return true;
> >>>+}
> >>>+
> >>>+static uint64_t get_pte_translation_mode(uint64_t pte)
> >>>+{
> >>>+ uint64_t level = (pte >> DEV_MODE_RSHIFT) & DEV_MODE_MASK;
> >>>+
> >>>+ if(level == 7){
> >>>+ /* reserved level - abort ? */
> >>>+ IOMMU_DPRINTF(MMU,
> >>>+ "Reserved translation level (7) detected");
> >>>+ return 0;
> >>>+ }
> >>>+
> >>>+ return level;
> >>>+}
> >>>+
> >>>+/* TODO : Mark addresses as Accessed and Dirty */
> >>>+static void amd_iommu_do_translate(AMDIOMMUAddressSpace *as, hwaddr addr,
> >>>bool is_write, IOMMUTLBEntry *ret)
> >>>+{
> >>>+ AMDIOMMUState *s = as->iommu_state;
> >>>+
> >>>+ int present;
> >>>+ dma_addr_t pte_addr;
> >>>+ uint64_t entry[4], pte, pte_perms;
> >>>+ unsigned level;
> >>>+ unsigned perms;
> >>>+
> >>>+ if(!amd_iommu_get_dte(s, as->devfn, entry)){
> >>>+ goto no_translation;
> >>>+ }
> >>>+
> >>>+ pte = entry[0];
> >>>+
> >>>+ /*
> >>>+ * It's okay to check for either read or write permissions
> >>>+ * even for memory maps, since we don't support R/W maps.
> >>>+ */
> >>>+ perms = is_write ? IOMMU_PERM_WRITE : IOMMU_PERM_READ;
> >>>+
> >>>+ if(!(level = get_pte_translation_mode(pte))){
> >>>+ goto no_translation;
> >>>+ }
> >>>+
> >>>+ while(level > 0){
> >>>+ /*
> >>>+ * check permissions: the bitwise
> >>>+ * implication perms -> entry_perms must be true. Pages must be
> >>>present
> >>>+ * and permissions on all levels must be similar
> >>>+ */
> >>>+ pte_perms = amd_iommu_get_perms(pte);
> >>>+ present = pte & 1;
> >>>+ if(!present || perms != (perms & pte_perms)){
> >>>+ amd_iommu_page_fault(s, as->devfn, entry[1] &
> >>>DEV_DOMID_ID_MASK, addr, present,
> >>>+ !!(perms & IOMMU_PERM_WRITE));
> >>>+ return;
> >>>+ }
> >>>+
> >>>+ /* go to the next lower level */
> >>>+ pte_addr = pte & DEV_PT_ROOT_MASK;
> >>>+ pte_addr += ((addr >> ( 9 * level)) & 0xff8);
> >>
> >>Does this work for six level page tables? The highest level has different
> >>bit size there IIRC.
> >>
> >>>+ pte = ldq_phys(&address_space_memory, pte_addr);
> >>>+ level = (pte >> DEV_MODE_RSHIFT) & DEV_MODE_MASK;
> >>>+ }
> >>>+
> >>>+ ret->iova = addr & IOMMU_PAGE_MASK_4K;
> >>>+ ret->translated_addr = (pte & DEV_PT_ROOT_MASK) & IOMMU_PAGE_MASK_4K;
> >>>+ ret->addr_mask = ~IOMMU_PAGE_MASK_4K;
> >>>+ ret->perm = IOMMU_RW;
> >>>+ return;
> >>>+
> >>>+no_translation:
> >>>+ ret->iova = addr;
> >>>+ ret->translated_addr = addr & IOMMU_PAGE_MASK_4K;
> >>>+ ret->addr_mask = ~IOMMU_PAGE_MASK_4K;
> >>>+ ret->perm = IOMMU_RW;
> >>>+ return;
> >>
> >>Are you sure these transactions needs to be passed through rather than
> >>target-aborted?
> >>
> >>>+}
> >>>+
> >>>+static IOMMUTLBEntry amd_iommu_translate(MemoryRegion *iommu, hwaddr
> >>>addr, bool is_write)
> >>>+{
> >>>+
> >>>+ IOMMU_DPRINTF(GENERAL, "");
> >>>+
> >>>+ AMDIOMMUAddressSpace *as = container_of(iommu, AMDIOMMUAddressSpace,
> >>>iommu);
> >>>+ AMDIOMMUState *s = as->iommu_state;
> >>>+
> >>>+ IOMMUTLBEntry ret = {
> >>>+ .target_as = &address_space_memory,
> >>>+ .iova = addr,
> >>>+ .translated_addr = 0,
> >>>+ .addr_mask = ~(hwaddr)0,
> >>>+ .perm = IOMMU_NONE,
> >>>+ };
> >>>+
> >>>+ if(!s->enabled){
> >>>+ /* IOMMU disabled - corresponds to iommu=off not failure to
> >>>provide any parameter */
> >>>+ ret.iova = addr & IOMMU_PAGE_MASK_4K;
> >>>+ ret.translated_addr = addr & IOMMU_PAGE_MASK_4K;
> >>>+ ret.addr_mask = ~IOMMU_PAGE_MASK_4K;
> >>>+ ret.perm = IOMMU_RW;
> >>>+ return ret;
> >>>+ }
> >>>+
> >>>+ amd_iommu_do_translate(as, addr, is_write, &ret);
> >>>+
> >>>+ IOMMU_DPRINTF(MMU,
> >>>+ "devid: %02x:%02x.%x gpa 0x%"PRIx64 " hpa 0x%"PRIx64,
> >>>as->bus_num,
> >>>+ PCI_SLOT(as->devfn), PCI_FUNC(as->devfn), addr,
> >>>ret.translated_addr);
> >>>+
> >>>+ return ret;
> >>>+}
> >>>+
> >>>+static const MemoryRegionOps mmio_mem_ops = {
> >>>+ .read = amd_iommu_mmio_read,
> >>>+ .write = amd_iommu_mmio_write,
> >>>+ .endianness = DEVICE_LITTLE_ENDIAN,
> >>>+ .valid = {
> >>>+ .min_access_size = 1,
> >>>+ .max_access_size = 8,
> >>>+ .unaligned = false,
> >>>+ },
> >>>+
> >>>+ .valid = {
> >>>+ .min_access_size = 8,
> >>>+ .max_access_size = 8,
> >>>+ },
> >>>+};
> >>>+
> >>>+static void amd_iommu_set_misc_capab(uint32_t host_va, uint32_t host_pa,
> >>>uint32_t guest_va, uint32_t *reg)
> >>>+{
> >>>+ *reg = 0;
> >>
> >>Redundant line.
> >>
> >>
> >>>+
> >>>+ *reg |= MAX_VA_ADDR | MAX_PH_ADDR | MAX_GVA_ADDR;
> >>>+}
> >>>+
> >>>+/* FIXME: The similar code in reset and init could be combined into a
> >>>function */
> >>>+static void amd_iommu_reset(DeviceState *dev)
> >>>+{
> >>>+ AMDIOMMUState *s = AMD_IOMMU_DEVICE(dev);
> >>>+
> >>>+ uint32_t capab_header = CAPAB_FEATURES;
> >>>+ uint32_t capab_base_addr_low = s->mmio.addr & ~(0xffff0000);
> >>>+ uint32_t capab_base_addr_high = (s->mmio.addr & ~(0xffff)) >> 16;
> >>>+ uint32_t capab_range = 0xff000000;
> >>>+ uint32_t capab_misc = 0x0;
> >>>+
> >>>+ /* reset MMIO */
> >>>+ memset(s->mmior, 0, MMIO_SIZE);
> >>>+ amd_iommu_writeq(s, MMIO_EXT_FEATURES, EXT_FEATURES);
> >>>+ /* TODO :Disable event logging and reset all buffers */
> >>>+ amd_iommu_set_misc_capab(MAX_PH_ADDR, MAX_VA_ADDR, MAX_GVA_ADDR,
> >>>&capab_misc);
> >>>+
> >>>+ /* reset IOMMU specific capabilities */
> >>>+ pci_set_long(s->dev.config + s->capab_offset, capab_header);
> >>>+ pci_set_long(s->dev.config + s->capab_offset + CAPAB_BAR_LOW,
> >>>capab_base_addr_low);
> >>>+ pci_set_long(s->dev.config + s->capab_offset + CAPAB_BAR_HIGH,
> >>>capab_base_addr_high);
> >>>+ pci_set_long(s->dev.config + s->capab_offset + CAPAB_RANGE,
> >>>capab_range);
> >>>+ pci_set_long(s->dev.config + s->capab_offset + CAPAB_MISC,
> >>>capab_misc);
> >>
> >>
> >>Do we also need to reset MSI capability block?
> >>
> >>
> >>>+
> >>>+ /* reset device ident */
> >>>+ pci_config_set_vendor_id(s->dev.config, PCI_VENDOR_ID_AMD);
> >>>+ pci_config_set_device_id(s->dev.config, PCI_DEVICE_ID_RD890_IOMMU);
> >>>+ pci_config_set_class(s->dev.config, 0x0806);
> >>>+ pci_config_set_prog_interface(s->dev.config, 00);
> >>>+}
> >>>+
> >>>+static void amd_iommu_write_capab(PCIDevice *dev, uint32_t addr, uint32_t
> >>>val, int len)
> >>>+{
> >>>+ pci_default_write_config(dev, addr, val, len);
> >>>+}
> >>>+
> >>>+/* I honestly don't know how to reserve MMIO */
> >>>+static void amd_iommu_mmio_map(AMDIOMMUState *s, hwaddr addr)
> >>>+{
> >>>+ if(s->mmio.addr == addr){
> >>>+ return;
> >>>+ }
> >>>+
> >>>+// if(s->mmio.addr != (hwaddr)-1) {
> >>>+// memory_region_del_subregion(get_system_memory(), &s->mmio);
> >>>+// }
> >>>+
> >>>+ s->mmio.addr = addr;
> >>>+ memory_region_add_subregion(get_system_memory(), addr, &s->mmio);
> >>>+
> >>>+}
> >>>+
> >>>+static int amd_iommu_pci_initfn(PCIDevice *dev)
> >>>+{
> >>>+ AMDIOMMUState *s = container_of(dev, AMDIOMMUState, dev);
> >>>+ uint32_t capab_header = CAPAB_FEATURES;
> >>>+ uint32_t capab_base_addr_low = (s->mmio.addr & ~(0xffff0000));
> >>>+ uint32_t capab_base_addr_high = (s->mmio.addr & ~(0x0000ffff) >> 16);
> >>>+ uint32_t capab_range = 0xff000000;
> >>>+ uint32_t capab_misc = 0x0;
> >>>+
> >>>+ memset(s->mmior, 0, MMIO_SIZE);
> >>>+ amd_iommu_set_misc_capab(MAX_PH_ADDR, MAX_VA_ADDR, MAX_GVA_ADDR,
> >>>&capab_misc);
> >>>+
> >>>+ s->iommu_ops.translate = amd_iommu_translate;
> >>>+ s->enabled = false;
> >>>+ s->ats_enabled = false;
> >>>+ s->cmdbuf_enabled = false;
> >>>+ s->devtab_len = 0;
> >>>+ s->cmdbuf_len = 0;
> >>>+ s->cmdbuf_head = 0;
> >>>+ s->cmdbuf_tail = 0;
> >>>+ s->evtlog_head = 0;
> >>>+ s->evtlog_tail = 0;
> >>>+ s->excl_enabled = false;
> >>>+ s->excl_allow = false;
> >>>+ s->mmio_enabled = false;
> >>>+ dev->config_write = amd_iommu_write_capab;
> >>>+
> >>>+ size_t offset;
> >>>+ /* Save offset for IVRS */
> >>>+ s->capab_offset = offset = pci_add_capability(dev, PCI_CAP_ID_SEC, 0,
> >>>CAPAB_SIZE);
> >>>+ pci_set_long(s->dev.config + offset, capab_header);
> >>>+ pci_set_long(s->dev.config + offset + CAPAB_BAR_LOW,
> >>>capab_base_addr_low);
> >>>+ pci_set_long(s->dev.config + offset + CAPAB_BAR_HIGH,
> >>>capab_base_addr_high);
> >>>+ pci_set_long(s->dev.config + offset + CAPAB_RANGE, capab_range);
> >>>+ pci_set_long(s->dev.config + offset + CAPAB_MISC, capab_misc);
> >>>+
> >>>+ /* add msi and hypertransport capabilities */
> >>>+ pci_add_capability(dev, PCI_CAP_ID_MSI, 0, CAPAB_REG_SIZE);
> >>>+ pci_add_capability(dev, PCI_CAP_ID_HT, 0, CAPAB_REG_SIZE);
> >>>+
> >>>+ /* set up MMIO */
> >>>+ memory_region_init_io(&s->mmio, OBJECT(s), &mmio_mem_ops, s,
> >>>"amd-iommu", MMIO_SIZE);
> >>>+ amd_iommu_mmio_map(s, BUS_AMD_IOMMU_ADDR);
> >>>+
> >>>+ /* reset device ident */
> >>>+ pci_config_set_vendor_id(dev->config, PCI_VENDOR_ID_AMD);
> >>>+ pci_config_set_device_id(dev->config, PCI_DEVICE_ID_RD890_IOMMU);
> >>>+
> >>>+ /* may not be necessary */
> >>>+ pci_config_set_interrupt_pin(dev->config, 0x1a);
> >>>+
> >>>+ return 0;
> >>>+}
> >>>+
> >>>+static void amd_iommu_realize(PCIDevice *dev, Error **error)
> >>>+{
> >>>+ amd_iommu_pci_initfn(dev);
> >>>+}
> >>>+
> >>>+static const VMStateDescription vmstate_amd_iommu = {
> >>>+ .name = "amd-iommu",
> >>>+ .fields = (VMStateField[]) {
> >>>+ VMSTATE_PCI_DEVICE(dev, AMDIOMMUState),
> >>>+ VMSTATE_END_OF_LIST()
> >>>+ }
> >>>+};
> >>>+
> >>>+static Property amd_iommu_properties[] = {
> >>>+ DEFINE_PROP_UINT32("version", AMDIOMMUState, version, 2),
> >>>+ DEFINE_PROP_END_OF_LIST(),
> >>>+};
> >>>+
> >>>+/* not used for now but will be when cache is added */
> >>>+static void amd_iommu_uninit(PCIDevice *dev)
> >>>+{
> >>>+ return;
> >>>+}
> >>>+
> >>>+static void amd_iommu_class_init(ObjectClass *klass, void* data)
> >>>+{
> >>>+ DeviceClass *dc = DEVICE_CLASS(klass);
> >>>+ PCIDeviceClass *pci = PCI_DEVICE_CLASS(klass);
> >>>+
> >>>+ pci->realize = amd_iommu_realize;
> >>>+ pci->exit = amd_iommu_uninit;
> >>>+
> >>>+ dc->reset = amd_iommu_reset;
> >>>+ dc->vmsd = &vmstate_amd_iommu;
> >>>+ dc->props = amd_iommu_properties;
> >>>+}
> >>>+
> >>>+static const TypeInfo amd_iommu = {
> >>>+ .name = TYPE_AMD_IOMMU_DEVICE,
> >>>+ .parent = TYPE_PCI_DEVICE,
> >>>+ .instance_size = sizeof(AMDIOMMUState),
> >>>+ .class_init = amd_iommu_class_init
> >>>+};
> >>>+
> >>>+static void amd_iommu_register_types(void)
> >>>+{
> >>>+ type_register_static(&amd_iommu);
> >>>+}
> >>>+
> >>>+type_init(amd_iommu_register_types);
> >>>diff --git a/hw/i386/amd_iommu.h b/hw/i386/amd_iommu.h
> >>>new file mode 100644
> >>>index 0000000..90309eb
> >>>--- /dev/null
> >>>+++ b/hw/i386/amd_iommu.h
> >>>@@ -0,0 +1,298 @@
> >>>+/*
> >>>+ * QEMU emulation of an AMD IOMMU (AMD-Vi)
> >>>+ *
> >>>+ * Copyright (C) 2011 Eduard-Gabriel Mateanu
> >>>+ * Copyright (C) 2015 David Kiarie, <address@hidden>
> >>>+ *
> >>>+ * This program is free software; you can redistribute it and/or modify
> >>>+ * it under the terms of the GNU General Public License as published by
> >>>+ * the Free Software Foundation; either version 2 of the License, or
> >>>+ * (at your option) any later version.
> >>>+
> >>>+ * This program is distributed in the hope that it will be useful,
> >>>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
> >>>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> >>>+ * GNU General Public License for more details.
> >>>+
> >>>+ * You should have received a copy of the GNU General Public License
> >>>along
> >>>+ * with this program; if not, see <http://www.gnu.org/licenses/>.
> >>>+ */
> >>>+
> >>>+#ifndef AMD_IOMMU_H_
> >>>+#define AMD_IOMMU_H_
> >>>+
> >>>+#include "hw/hw.h"
> >>>+#include "hw/pci/pci.h"
> >>>+#include "hw/sysbus.h"
> >>>+#include "sysemu/dma.h"
> >>>+#include "qemu/osdep.h"
> >>>+#include "qemu/event_notifier.h"
> >>>+
> >>>+/* Capability registers */
> >>>+#define CAPAB_HEADER 0x00
> >>>+#define CAPAB_REV_TYPE 0x02
> >>>+#define CAPAB_FLAGS 0x03
> >>>+#define CAPAB_BAR_LOW 0x04
> >>>+#define CAPAB_BAR_HIGH 0x08
> >>>+#define CAPAB_RANGE 0x0C
> >>>+#define CAPAB_MISC 0x10
> >>>+#define CAPAB_MISC1 0x14
> >>>+
> >>>+#define CAPAB_SIZE 0x18
> >>>+#define CAPAB_REG_SIZE 0x04
> >>>+
> >>>+/* Capability header data */
> >>>+#define CAPAB_FLAT_EXT (1 << 28)
> >>>+#define CAPAB_EFR_SUP (1 << 27)
> >>>+#define CAPAB_FLAG_NPCACHE (1 << 26)
> >>>+#define CAPAB_FLAG_HTTUNNEL (1 << 25)
> >>>+#define CAPAB_FLAG_IOTLBSUP (1 << 24)
> >>>+#define CAPAB_INIT_REV (1 << 19)
> >>>+#define CAPAB_INIT_TYPE (3 << 16)
> >>>+#define CAPAB_INIT_REV_TYPE (CAPAB_REV | CAPAB_TYPE)
> >>>+#define CAPAB_INIT_FLAGS (CAPAB_FLAG_NPCACHE |
> >>>CAPAB_FLAG_HTTUNNEL)
> >>>+#define CAPAB_INIT_MISC ((64 << 15) | (48 << 8))
> >>>+#define CAPAB_BAR_MASK (~((1UL << 14) - 1))
> >>>+
> >>>+/* MMIO registers */
> >>>+#define MMIO_DEVICE_TABLE 0x0000
> >>>+#define MMIO_COMMAND_BASE 0x0008
> >>>+#define MMIO_EVENT_BASE 0x0010
> >>>+#define MMIO_CONTROL 0x0018
> >>>+#define MMIO_EXCL_BASE 0x0020
> >>>+#define MMIO_EXCL_LIMIT 0x0028
> >>>+#define MMIO_EXT_FEATURES 0x0030
> >>>+#define MMIO_COMMAND_HEAD 0x2000
> >>>+#define MMIO_COMMAND_TAIL 0x2008
> >>>+#define MMIO_EVENT_HEAD 0x2010
> >>>+#define MMIO_EVENT_TAIL 0x2018
> >>>+#define MMIO_STATUS 0x2020
> >>>+#define MMIO_PPR_BASE 0x0038
> >>>+#define MMIO_PPR_HEAD 0x2030
> >>>+#define MMIO_PPR_TAIL 0x2038
> >>>+
> >>>+#define MMIO_SIZE 0x4000
> >>>+
> >>>+#define MMIO_DEVTAB_SIZE_MASK ((1ULL << 12) - 1)
> >>>+#define MMIO_DEVTAB_BASE_MASK (((1ULL << 52) - 1) &
> >>>~MMIO_DEVTAB_SIZE_MASK)
> >>>+#define MMIO_DEVTAB_ENTRY_SIZE 32
> >>>+#define MMIO_DEVTAB_SIZE_UNIT 4096
> >>>+
> >>>+#define MMIO_CMDBUF_SIZE_BYTE (MMIO_COMMAND_BASE + 7)
> >>>+#define MMIO_CMDBUF_SIZE_MASK 0x0F
> >>>+#define MMIO_CMDBUF_BASE_MASK MMIO_DEVTAB_BASE_MASK
> >>>+#define MMIO_CMDBUF_DEFAULT_SIZE 8
> >>>+#define MMIO_CMDBUF_HEAD_MASK (((1ULL << 19) - 1) & ~0x0F)
> >>>+#define MMIO_CMDBUF_TAIL_MASK MMIO_EVTLOG_HEAD_MASK
> >>>+
> >>>+#define MMIO_EVTLOG_SIZE_BYTE (MMIO_EVENT_BASE + 7)
> >>>+#define MMIO_EVTLOG_SIZE_MASK MMIO_CMDBUF_SIZE_MASK
> >>>+#define MMIO_EVTLOG_BASE_MASK MMIO_CMDBUF_BASE_MASK
> >>>+#define MMIO_EVTLOG_DEFAULT_SIZE MMIO_CMDBUF_DEFAULT_SIZE
> >>>+#define MMIO_EVTLOG_HEAD_MASK (((1ULL << 19) - 1) & ~0x0F)
> >>>+#define MMIO_EVTLOG_TAIL_MASK MMIO_EVTLOG_HEAD_MASK
> >>>+
> >>>+#define MMIO_EXCL_BASE_MASK MMIO_DEVTAB_BASE_MASK
> >>>+#define MMIO_EXCL_ENABLED_MASK (1ULL << 0)
> >>>+#define MMIO_EXCL_ALLOW_MASK (1ULL << 1)
> >>>+#define MMIO_EXCL_LIMIT_MASK MMIO_DEVTAB_BASE_MASK
> >>>+#define MMIO_EXCL_LIMIT_LOW 0xFFF
> >>>+
> >>>+#define MMIO_CONTROL_IOMMUEN (1ULL << 0)
> >>>+#define MMIO_CONTROL_HTTUNEN (1ULL << 1)
> >>>+#define MMIO_CONTROL_EVENTLOGEN (1ULL << 2)
> >>>+#define MMIO_CONTROL_EVENTINTEN (1ULL << 3)
> >>>+#define MMIO_CONTROL_COMWAITINTEN (1ULL << 4)
> >>>+#define MMIO_CONTROL_CMDBUFLEN (1ULL << 12)
> >>>+
> >>>+#define MMIO_STATUS_EVTLOG_OF (1ULL << 0)
> >>>+#define MMIO_STATUS_EVTLOG_INTR (1ULL << 1)
> >>>+#define MMIO_STATUS_COMWAIT_INTR (1ULL << 2)
> >>>+#define MMIO_STATUS_EVTLOG_RUN (1ULL << 3)
> >>>+#define MMIO_STATUS_CMDBUF_RUN (1ULL << 4)
> >>>+
> >>>+#define CMDBUF_ID_BYTE 0x07
> >>>+#define CMDBUF_ID_RSHIFT 4
> >>>+#define CMDBUF_ENTRY_SIZE 0x10
> >>>+
> >>>+#define CMD_COMPLETION_WAIT 0x01
> >>>+#define CMD_INVAL_DEVTAB_ENTRY 0x02
> >>>+#define CMD_INVAL_IOMMU_PAGES 0x03
> >>>+#define CMD_INVAL_IOTLB_PAGES 0x04
> >>>+#define CMD_INVAL_INTR_TABLE 0x05
> >>>+
> >>>+#define DEVTAB_ENTRY_SIZE 32
> >>>+
> >>>+/* Device table entry bits 0:63 */
> >>>+#define DEV_VALID (1ULL << 0)
> >>>+#define DEV_TRANSLATION_VALID (1ULL << 1)
> >>>+#define DEV_MODE_MASK 0x7
> >>>+#define DEV_MODE_RSHIFT 9
> >>>+#define DEV_PT_ROOT_MASK 0xFFFFFFFFFF000
> >>>+#define DEV_PT_ROOT_RSHIFT 12
> >>>+#define DEV_PERM_SHIFT 61
> >>>+#define DEV_PERM_READ (1ULL << 61)
> >>>+#define DEV_PERM_WRITE (1ULL << 62)
> >>>+
> >>>+/* Device table entry bits 64:127 */
> >>>+#define DEV_DOMID_ID_MASK ((1ULL << 16) - 1)
> >>>+#define DEV_IOTLB_SUPPORT (1ULL << 17)
> >>>+#define DEV_SUPPRESS_PF (1ULL << 18)
> >>>+#define DEV_SUPPRESS_ALL_PF (1ULL << 19)
> >>>+#define DEV_IOCTL_MASK (~3)
> >>>+#define DEV_IOCTL_RSHIFT 20
> >>>+#define DEV_IOCTL_DENY 0
> >>>+#define DEV_IOCTL_PASSTHROUGH 1
> >>>+#define DEV_IOCTL_TRANSLATE 2
> >>>+#define DEV_CACHE (1ULL << 37)
> >>>+#define DEV_SNOOP_DISABLE (1ULL << 38)
> >>>+#define DEV_EXCL (1ULL << 39)
> >>>+
> >>>+/* Event codes and flags, as stored in the info field */
> >>>+#define EVENT_ILLEGAL_DEVTAB_ENTRY (0x1U << 24)
> >>>+#define EVENT_IOPF (0x2U << 24)
> >>>+#define EVENT_IOPF_I (1U << 3)
> >>>+#define EVENT_IOPF_PR (1U << 4)
> >>>+#define EVENT_IOPF_RW (1U << 5)
> >>>+#define EVENT_IOPF_PE (1U << 6)
> >>>+#define EVENT_IOPF_RZ (1U << 7)
> >>>+#define EVENT_IOPF_TR (1U << 8)
> >>>+#define EVENT_DEV_TAB_HW_ERROR (0x3U << 24)
> >>>+#define EVENT_PAGE_TAB_HW_ERROR (0x4U << 24)
> >>>+#define EVENT_ILLEGAL_COMMAND_ERROR (0x5U << 24)
> >>>+#define EVENT_COMMAND_HW_ERROR (0x6U << 24)
> >>>+#define EVENT_IOTLB_INV_TIMEOUT (0x7U << 24)
> >>>+#define EVENT_INVALID_DEV_REQUEST (0x8U << 24)
> >>>+
> >>>+#define EVENT_LEN 16
> >>>+
> >>>+#define IOMMU_PERM_READ (1 << 0)
> >>>+#define IOMMU_PERM_WRITE (1 << 1)
> >>>+#define IOMMU_PERM_RW (IOMMU_PERM_READ | IOMMU_PERM_WRITE)
> >>>+
> >>>+/* AMD RD890 Chipset */
> >>>+#define PCI_DEVICE_ID_RD890_IOMMU 0x20
> >>>+
> >>>+#define PCI_CAP_ID_SEC 0xf /* IOMMU capability header
> >>>register */
> >>>+#define PCI_CAP_ID_MMIO_LOW 0x0 /* MMIO base address low
> >>>register */
> >>>+#define PCI_CAP_ID_MMIO_HIGH 0x0 /* MMIO base address high
> >>>register */
> >>>+#define PCI_CAP_ID_RANGE 0x0 /* Device range register
> >>>*/
> >>>+#define PCI_CAP_ID_MISC 0x0 /* miscellaneous Information
> >>>register 0 */
> >>>+#define PCI_CAP_ID_MISC1 0x0 /* miscellaneous Information
> >>>register 1 */
> >>>+
> >>>+#define FEATURE_PREFETCH (1ULL<<0)
> >>>+#define FEATURE_PPR (1ULL<<1)
> >>>+#define FEATURE_NX (1ULL<<3)
> >>>+#define FEATURE_GT (1ULL<<4)
> >>>+#define FEATURE_IA (1ULL<<6)
> >>>+#define FEATURE_GA (1ULL<<7)
> >>>+#define FEATURE_HE (1ULL<<8)
> >>>+#define FEATURE_PC (1ULL<<9)
> >>>+
> >>>+/* IOMMU paging mode */
> >>>+#define GATS_MODE (6ULL << 12)
> >>>+#define HATS_MODE (6ULL << 10)
> >>>+/* PCI SIG constants */
> >>>+#define PCI_BUS_MAX 256
> >>>+#define PCI_SLOT_MAX 32
> >>>+#define PCI_FUNC_MAX 8
> >>>+#define PCI_DEVFN_MAX 256
> >>>+
> >>>+/* extended feature support */
> >>>+#define EXT_FEATURES (FEATURE_PREFETCH | FEATURE_PPR | FEATURE_NX |
> >>>FEATURE_GT | FEATURE_IA | FEATURE_GA | FEATURE_HE | GATS_MODE | HATS_MODE )
> >>>+
> >>>+/* capabilities header */
> >>>+#define CAPAB_FEATURES (CAPAB_FLAT_EXT | CAPAB_FLAG_NPCACHE |
> >>>CAPAB_FLAG_IOTLBSUP | PCI_CAP_ID_SEC | CAPAB_INIT_TYPE |
> >>>CAPAB_FLAG_HTTUNNEL
> >>>| CAPAB_EFR_SUP)
> >>>+
> >>>+/* command constants */
> >>>+#define COM_STORE_ADDRESS_MASK 0xffffffffffff8
> >>>+#define COM_COMPLETION_STORE_MASK 0x1
> >>>+#define COM_COMPLETION_INTR 0x2
> >>>+#define COM_COMPLETION_DATA_OFF 0x8
> >>>+#define IOMMU_COMMAND_SIZE 0x10
> >>>+
> >>>+/* IOMMU default address */
> >>>+#define BUS_AMD_IOMMU_ADDR 0xfeb00000
> >>>+
> >>>+/* page management constants */
> >>>+#define IOMMU_PAGE_SHIFT 12
> >>>+#define IOMMU_PAGE_SIZE (1ULL << IOMMU_PAGE_SHIFT)
> >>>+
> >>>+#define IOMMU_PAGE_SHIFT_4K 12
> >>>+#define IOMMU_PAGE_MASK_4K (~((1ULL << IOMMU_PAGE_SHIFT_4K) - 1))
> >>>+#define IOMMU_PAGE_SHIFT_2M 21
> >>>+#define IOMMU_PAGE_MASK_2M (~((1ULL << IOMMU_PAGE_SHIFT_2M) -1))
> >>>+#define IOMMU_PAGE_SHIFT_1G 30
> >>>+#define IOMMU_PAGE_MASK_1G (~((1ULL << IOMMU_PAGE_SHIFT_1G) - 1))
> >>>+
> >>>+#define TYPE_AMD_IOMMU_DEVICE "amd-iommu"
> >>>+#define AMD_IOMMU_DEVICE(obj)\
> >>>+ OBJECT_CHECK(AMDIOMMUState, (obj), TYPE_AMD_IOMMU_DEVICE)
> >>>+
> >>>+typedef struct AMDIOMMUState AMDIOMMUState;
> >>>+
> >>>+typedef struct AMDIOMMUAddressSpace{
> >>>+ uint8_t bus_num; /* bus number
> >>>*/
> >>>+ uint8_t devfn; /* device function
> >>>*/
> >>>+ AMDIOMMUState *iommu_state; /* IOMMU - one per machine
> >>>*/
> >>>+ MemoryRegion iommu; /* Device's iommu region
> >>>*/
> >>>+ AddressSpace as; /* device's corresponding address space
> >>>*/
> >>>+}AMDIOMMUAddressSpace;
> >>>+
> >>>+struct AMDIOMMUState {
> >>>+ PCIDevice dev; /* The PCI device itself */
> >>>+
> >>>+ uint32_t version;
> >>>+
> >>>+ int capab_offset; /* capability offset pointer */
> >>>+ unsigned char *capab; /* capabilities registers */
> >>>+
> >>>+ bool enabled; /* IOMMU enabled */
> >>>+ bool ats_enabled; /* address translation enabled */
> >>>+ bool cmdbuf_enabled; /* command buffer enabled */
> >>>+ bool evtlog_enabled; /* event log enabled */
> >>>+ bool excl_enabled;
> >>>+
> >>>+ dma_addr_t devtab; /* base address device table */
> >>>+ size_t devtab_len; /* device table length */
> >>>+
> >>>+ dma_addr_t cmdbuf; /* command buffer base address */
> >>>+ uint64_t cmdbuf_len; /* command buffer length */
> >>>+ unsigned cmdbuf_head; /* current IOMMU read position */
> >>>+ unsigned cmdbuf_tail; /* next Software write position */
> >>>+ int completion_wait_intr;
> >>>+
> >>>+ dma_addr_t evtlog; /* base address event log */
> >>>+ size_t evtlog_intr;
> >>>+ size_t evtlog_len; /* event log length */
> >>>+ size_t evtlog_head; /* event log head */
> >>>+ size_t evtlog_tail; /* event log tail */
> >>>+
> >>>+ /* unused for now */
> >>>+ dma_addr_t excl_base; /* base DVA - IOMMU exclusion range */
> >>>+ dma_addr_t excl_limit; /* limit of IOMMU exclusion range */
> >>>+ bool excl_allow; /* translate accesses to the exclusion
> >>>range */
> >>>+ bool excl_enable; /* exclusion range enabled */
> >>>+
> >>>+ MemoryRegion mmio; /* MMIO region */
> >>>+ unsigned char mmior[MMIO_SIZE];
> >>>+ bool mmio_enabled;
> >>>+
> >>>+ /* IOMMU function */
> >>>+ MemoryRegionIOMMUOps iommu_ops;
> >>>+
> >>>+ /* for each served device */
> >>>+ AMDIOMMUAddressSpace **address_spaces[PCI_BUS_MAX];
> >>>+};
> >>>+
> >>>+typedef struct AMDIOMMUEvent {
> >>>+ uint16_t devfn;
> >>>+ uint16_t reserved;
> >>>+ uint16_t domid;
> >>>+ uint16_t info;
> >>>+ uint16_t addr;
> >>>+} __attribute__((packed)) AMDIOMMUEvent;
> >>>+
> >>>+AddressSpace *bridge_host_amd_iommu(PCIBus *bus, void *opaque, int
> >>>devfn);
> >>>+
> >>>+#endif
> >>>
> >>
> >>Regards,
> >>Valentine
>
> --
> С уважением,
> Синицын Валентин
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/07
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, David kiarie, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, David kiarie, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, David kiarie, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, David kiarie, 2015/09/09
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/09
Re: [Qemu-devel] [RFC 2/4] hw/i386: Introduce AMD IOMMU, Valentine Sinitsyn, 2015/09/12