[PATCH v4 18/18] pnv/xive2: Add support for 8bits thread id

["Cédric Le Goater" <clg@kaod.org>]

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
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 296a2d949498..e9e3ea135ea6 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 b51571c6034f..87303b40641b 100644
--- a/hw/intc/pnv_xive2.c
+++ b/hw/intc/pnv_xive2.c
@@ -439,6 +439,11 @@ 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 fd9cfebd782d..b6452f14784b 100644
--- a/hw/intc/xive2.c
+++ b/hw/intc/xive2.c
@@ -459,7 +459,8 @@ 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));
-- 
2.34.1