@@ -228,6 +228,7 @@
* VSD and is only meant to be used in indirect mode !
*/
#define VSD_MODE PPC_BITMASK(0, 1)
+#define VSD_MODE_INVALID 0
#define VSD_MODE_SHARED 1
#define VSD_MODE_EXCLUSIVE 2
#define VSD_MODE_FORWARD 3
@@ -225,6 +225,11 @@ static uint64_t pnv_xive_vst_addr(PnvXive *xive, uint32_t type, uint8_t blk,
/* Remote VST access */
if (GETFIELD(VSD_MODE, vsd) == VSD_MODE_FORWARD) {
+ if (type != VST_TSEL_VPDT) {
+ xive_error(xive, "VST: invalid access on remote VST %s %x/%x !?",
+ info->name, blk, idx);
+ return 0;
+ }
xive = pnv_xive_get_remote(blk);
return xive ? pnv_xive_vst_addr(xive, type, blk, idx) : 0;
@@ -275,12 +280,26 @@ static int pnv_xive_vst_write(PnvXive *xive, uint32_t type, uint8_t blk,
static int pnv_xive_get_end(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveEND *end)
{
+ PnvXive *xive = PNV_XIVE(xrtr);
+
+ if (pnv_xive_block_id(xive) != blk) {
+ xive_error(xive, "VST: END %x/%x is remote !?", blk, idx);
+ return -1;
+ }
+
return pnv_xive_vst_read(PNV_XIVE(xrtr), VST_TSEL_EQDT, blk, idx, end);
}
static int pnv_xive_write_end(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveEND *end, uint8_t word_number)
{
+ PnvXive *xive = PNV_XIVE(xrtr);
+
+ if (pnv_xive_block_id(xive) != blk) {
+ xive_error(xive, "VST: END %x/%x is remote !?", blk, idx);
+ return -1;
+ }
+
return pnv_xive_vst_write(PNV_XIVE(xrtr), VST_TSEL_EQDT, blk, idx, end,
word_number);
}
@@ -1349,6 +1368,50 @@ static const MemoryRegionOps pnv_xive_ic_reg_ops = {
#define PNV_XIVE_SYNC_PUSH 0xf00 /* Sync push context */
#define PNV_XIVE_SYNC_VPC 0xf80 /* Sync remove VPC store */
+static void pnv_xive_end_notify(XiveRouter *xrtr, XiveEAS *eas)
+{
+ PnvXive *xive = PNV_XIVE(xrtr);
+ uint8_t end_blk = xive_get_field64(EAS_END_BLOCK, eas->w);
+ uint32_t end_idx = xive_get_field64(EAS_END_INDEX, eas->w);
+ uint32_t end_data = xive_get_field64(EAS_END_DATA, eas->w);
+ uint64_t end_vsd = xive->vsds[VST_TSEL_EQDT][end_blk];
+
+ switch (GETFIELD(VSD_MODE, end_vsd)) {
+ case VSD_MODE_EXCLUSIVE:
+ /* Perform the END notification on the local IC. */
+ xive_router_end_notify(xrtr, eas);
+ break;
+
+ case VSD_MODE_FORWARD: {
+ MemTxResult result;
+ uint64_t notif_port = end_vsd & VSD_ADDRESS_MASK;
+ uint64_t data = XIVE_TRIGGER_END | XIVE_TRIGGER_PQ |
+ be64_to_cpu(eas->w);
+
+ /* Forward the store on the remote IC notify page. */
+ address_space_stq_be(&address_space_memory, notif_port, data,
+ MEMTXATTRS_UNSPECIFIED, &result);
+ if (result != MEMTX_OK) {
+ xive_error(xive, "IC: Forward notif END %x/%x [%x] failed @%"
+ HWADDR_PRIx, end_blk, end_idx, end_data, notif_port);
+ return;
+ }
+ break;
+ }
+
+ case VSD_MODE_INVALID:
+ default:
+ /* Set FIR */
+ xive_error(xive, "IC: Invalid END VSD for block %x", end_blk);
+ return;
+ }
+}
+
+/*
+ * The notify page can either be used to receive trigger events from
+ * the HW controllers (PHB, PSI) or to reroute interrupts between
+ * Interrupt controllers.
+ */
static void pnv_xive_ic_hw_trigger(PnvXive *xive, hwaddr addr, uint64_t val)
{
uint8_t blk;
@@ -1357,8 +1420,8 @@ static void pnv_xive_ic_hw_trigger(PnvXive *xive, hwaddr addr, uint64_t val)
trace_pnv_xive_ic_hw_trigger(addr, val);
if (val & XIVE_TRIGGER_END) {
- xive_error(xive, "IC: END trigger at @0x%"HWADDR_PRIx" data 0x%"PRIx64,
- addr, val);
+ val = cpu_to_be64(val);
+ pnv_xive_end_notify(XIVE_ROUTER(xive), (XiveEAS *) &val);
return;
}
@@ -1998,6 +2061,7 @@ static void pnv_xive_class_init(ObjectClass *klass, void *data)
xrc->get_nvt = pnv_xive_get_nvt;
xrc->write_nvt = pnv_xive_write_nvt;
xrc->get_block_id = pnv_xive_get_block_id;
+ xrc->end_notify = pnv_xive_end_notify;
xnc->notify = pnv_xive_notify;
xpc->match_nvt = pnv_xive_match_nvt;
The notify page of the interrupt controller can either be used to receive trigger events from the HW controllers (PHB, PSI) or to reroute interrupts between Interrupt Controller. In which case, the VSD table is used to determine the address of the notify page of the remote IC and the store data is forwarded. Today, our model grabs the remote VSD (EAS, END, NVT) address using pnv_xive_get_remote() helper but this is incorrect. EAS accesses should always be local and END triggers should be rerouted using a store on the remote IC notify page. We still have a shortcut in the model for the NVT accesses. It will be addressed later when we model the PC mmio operations. Signed-off-by: Cédric Le Goater <clg@kaod.org> --- hw/intc/pnv_xive_regs.h | 1 + hw/intc/pnv_xive.c | 68 +++++++++++++++++++++++++++++++++++++++-- 2 files changed, 67 insertions(+), 2 deletions(-)