[PATCH v3 18/18] pnv/xive2: Add support for 8bits thread id

[Cédric Le Goater]

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/xive2.h | 1 +
 hw/intc/pnv_xive2.c    | 5 +++++
 hw/intc/xive2.c        | 3 ++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/hw/ppc/xive2.h b/include/hw/ppc/xive2.h
index 88c3e393162d..001388ccea7a 100644
--- a/include/hw/ppc/xive2.h
+++ b/include/hw/ppc/xive2.h
@@ -31,6 +31,7 @@ OBJECT_DECLARE_TYPE(Xive2Router, Xive2RouterClass, 
XIVE2_ROUTER);
 
 #define XIVE2_GEN1_TIMA_OS      0x00000001
 #define XIVE2_VP_SAVE_RESTORE   0x00000002
+#define XIVE2_THREADID_8BITS    0x00000004
 
 typedef struct Xive2RouterClass {
     SysBusDeviceClass parent;
diff --git a/hw/intc/pnv_xive2.c b/hw/intc/pnv_xive2.c
index 6f0a63cd3d2f..5aaccaf78934 100644
--- a/hw/intc/pnv_xive2.c
+++ b/hw/intc/pnv_xive2.c
@@ -438,6 +438,11 @@ static uint32_t pnv_xive2_get_config(Xive2Router *xrtr)
         cfg |= XIVE2_VP_SAVE_RESTORE;
     }
 
+    if (GETFIELD(CQ_XIVE_CFG_HYP_HARD_RANGE,
+              xive->cq_regs[CQ_XIVE_CFG >> 3]) == CQ_XIVE_CFG_THREADID_8BITS) {
+        cfg |= XIVE2_THREADID_8BITS;
+    }
+
     return cfg;
 }
 
diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c
index 978a0e3972e1..6b46f7021b46 100644
--- a/hw/intc/xive2.c
+++ b/hw/intc/xive2.c
@@ -458,7 +458,8 @@ static uint32_t xive2_tctx_hw_cam_line(XivePresenter *xptr, 
XiveTCTX *tctx)
     CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env;
     uint32_t pir = env->spr_cb[SPR_PIR].default_value;
     uint8_t blk = xive2_router_get_block_id(xrtr);
-    uint8_t tid_shift = 7;
+    uint8_t tid_shift =
+        xive2_router_get_config(xrtr) & XIVE2_THREADID_8BITS ? 8 : 7;
     uint8_t tid_mask = (1 << tid_shift) - 1;
 
     return xive2_nvp_cam_line(blk, 1 << tid_shift | (pir & tid_mask));
-- 
2.31.1