[PATCH for-5.0 v5 18/23] ppc/xive: Move the TIMA operations to the controller model

[Cédric Le Goater]

On the P9 Processor, the thread interrupt context registers of a CPU
can be accessed "directly" when by load/store from the CPU or
"indirectly" by the IC through an indirect TIMA page. This requires to
configure first the PC_TCTXT_INDIRx registers.

Today, we rely on the get_tctx() handler to deduce from the CPU PIR
the chip from which the TIMA access is being done. By handling the
TIMA memory ops under the interrupt controller model of each machine,
we can uniformize the TIMA direct and indirect ops under PowerNV. We
can also check that the CPUs have been enabled in the XIVE controller.

This prepares ground for the future versions of XIVE.

Signed-off-by: Cédric Le Goater <address@hidden>
---
 include/hw/ppc/xive.h |  1 -
 hw/intc/pnv_xive.c    | 35 ++++++++++++++++++++++++++++++++++-
 hw/intc/spapr_xive.c  | 33 +++++++++++++++++++++++++++++++--
 hw/intc/xive.c        | 29 -----------------------------
 4 files changed, 65 insertions(+), 33 deletions(-)

diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index 97bbcddb381d..dcf897451589 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -462,7 +462,6 @@ typedef struct XiveENDSource {
 #define XIVE_TM_OS_PAGE         0x2
 #define XIVE_TM_USER_PAGE       0x3
 
-extern const MemoryRegionOps xive_tm_ops;
 void xive_tctx_tm_write(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,
                         uint64_t value, unsigned size);
 uint64_t xive_tctx_tm_read(XivePresenter *xptr, XiveTCTX *tctx, hwaddr offset,
diff --git a/hw/intc/pnv_xive.c b/hw/intc/pnv_xive.c
index d75053d0baad..4501c671d8df 100644
--- a/hw/intc/pnv_xive.c
+++ b/hw/intc/pnv_xive.c
@@ -1473,6 +1473,39 @@ static const MemoryRegionOps xive_tm_indirect_ops = {
     },
 };
 
+static void pnv_xive_tm_write(void *opaque, hwaddr offset,
+                              uint64_t value, unsigned size)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(current_cpu);
+    PnvXive *xive = pnv_xive_tm_get_xive(cpu);
+    XiveTCTX *tctx = XIVE_TCTX(pnv_cpu_state(cpu)->intc);
+
+    xive_tctx_tm_write(XIVE_PRESENTER(xive), tctx, offset, value, size);
+}
+
+static uint64_t pnv_xive_tm_read(void *opaque, hwaddr offset, unsigned size)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(current_cpu);
+    PnvXive *xive = pnv_xive_tm_get_xive(cpu);
+    XiveTCTX *tctx = XIVE_TCTX(pnv_cpu_state(cpu)->intc);
+
+    return xive_tctx_tm_read(XIVE_PRESENTER(xive), tctx, offset, size);
+}
+
+const MemoryRegionOps pnv_xive_tm_ops = {
+    .read = pnv_xive_tm_read,
+    .write = pnv_xive_tm_write,
+    .endianness = DEVICE_BIG_ENDIAN,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 8,
+    },
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 8,
+    },
+};
+
 /*
  * Interrupt controller XSCOM region.
  */
@@ -1845,7 +1878,7 @@ static void pnv_xive_realize(DeviceState *dev, Error 
**errp)
                           "xive-pc", PNV9_XIVE_PC_SIZE);
 
     /* Thread Interrupt Management Area (Direct) */
-    memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops,
+    memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &pnv_xive_tm_ops,
                           xive, "xive-tima", PNV9_XIVE_TM_SIZE);
 
     qemu_register_reset(pnv_xive_reset, dev);
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index bb3b2dfdb77f..6292da58f62c 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -205,6 +205,35 @@ void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool 
enable)
     memory_region_set_enabled(&xive->end_source.esb_mmio, false);
 }
 
+static void spapr_xive_tm_write(void *opaque, hwaddr offset,
+                          uint64_t value, unsigned size)
+{
+    XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx;
+
+    xive_tctx_tm_write(XIVE_PRESENTER(opaque), tctx, offset, value, size);
+}
+
+static uint64_t spapr_xive_tm_read(void *opaque, hwaddr offset, unsigned size)
+{
+    XiveTCTX *tctx = spapr_cpu_state(POWERPC_CPU(current_cpu))->tctx;
+
+    return xive_tctx_tm_read(XIVE_PRESENTER(opaque), tctx, offset, size);
+}
+
+const MemoryRegionOps spapr_xive_tm_ops = {
+    .read = spapr_xive_tm_read,
+    .write = spapr_xive_tm_write,
+    .endianness = DEVICE_BIG_ENDIAN,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 8,
+    },
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 8,
+    },
+};
+
 static void spapr_xive_end_reset(XiveEND *end)
 {
     memset(end, 0, sizeof(*end));
@@ -314,8 +343,8 @@ static void spapr_xive_realize(DeviceState *dev, Error 
**errp)
     qemu_register_reset(spapr_xive_reset, dev);
 
     /* TIMA initialization */
-    memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops, xive,
-                          "xive.tima", 4ull << TM_SHIFT);
+    memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &spapr_xive_tm_ops,
+                          xive, "xive.tima", 4ull << TM_SHIFT);
     sysbus_init_mmio(SYS_BUS_DEVICE(xive), &xive->tm_mmio);
 
     /*
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index a9298783e7d2..ab779c4c2a0f 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -523,35 +523,6 @@ uint64_t xive_tctx_tm_read(XivePresenter *xptr, XiveTCTX 
*tctx, hwaddr offset,
     return xive_tm_raw_read(tctx, offset, size);
 }
 
-static void xive_tm_write(void *opaque, hwaddr offset,
-                          uint64_t value, unsigned size)
-{
-    XiveTCTX *tctx = xive_router_get_tctx(XIVE_ROUTER(opaque), current_cpu);
-
-    xive_tctx_tm_write(XIVE_PRESENTER(opaque), tctx, offset, value, size);
-}
-
-static uint64_t xive_tm_read(void *opaque, hwaddr offset, unsigned size)
-{
-    XiveTCTX *tctx = xive_router_get_tctx(XIVE_ROUTER(opaque), current_cpu);
-
-    return xive_tctx_tm_read(XIVE_PRESENTER(opaque), tctx, offset, size);
-}
-
-const MemoryRegionOps xive_tm_ops = {
-    .read = xive_tm_read,
-    .write = xive_tm_write,
-    .endianness = DEVICE_BIG_ENDIAN,
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 8,
-    },
-    .impl = {
-        .min_access_size = 1,
-        .max_access_size = 8,
-    },
-};
-
 static char *xive_tctx_ring_print(uint8_t *ring)
 {
     uint32_t w2 = xive_tctx_word2(ring);
-- 
2.21.0