[PATCH v3 00/17] hw/microblaze: Allow running cross-endian vCPUs

[PATCH v3 00/17] hw/microblaze: Allow running cross-endian vCPUs

[Philippe Mathieu-Daudé]

Missing review: 4 (new) & 10

Since v2:
- Addressed Richard's review comments

Since v1:
- Make device endianness configurable (Edgar)
- Convert more Xilinx devices
- Avoid preprocessor #if (Richard)
- Add R-b tags

Make machines endianness-agnostic, allowing to run a big-endian vCPU
on the little-endian 'qemu-system-microblazeel' binary, and a little
endian one on the big-endian 'qemu-system-microblaze' binary.

Tests added, following combinations covered:
- little-endian vCPU using little-endian binary (in-tree)
- little-endian vCPU using big-endian binary (new)
- big-endian vCPU using little-endian binary (new)
- big-endian vCPU using big-endian binary (in-tree)

To make a target endian-agnostic we need to remove the MO_TE uses.
In order to do that, we propagate the MemOp from earlier in the
call stack, or we extract it from the vCPU env (on MicroBlaze the
CPU endianness is exposed by the 'ENDI' bit).

Next step: Look at unifying binaries.

Please review,

Phil.

Philippe Mathieu-Daudé (17):
  hw/microblaze: Restrict MemoryRegionOps are implemented as 32-bit
  hw/microblaze: Propagate CPU endianness to microblaze_load_kernel()
  hw/intc/xilinx_intc: Make device endianness configurable
  RFC hw/net/xilinx_ethlite: Simplify by having configurable endianness
  RFC hw/timer/xilinx_timer: Allow down to 8-bit memory access
  hw/timer/xilinx_timer: Make device endianness configurable
  hw/char/xilinx_uartlite: Make device endianness configurable
  hw/ssi/xilinx_spi: Make device endianness configurable
  hw/ssi/xilinx_spips: Make device endianness configurable
  hw/arm/xlnx-zynqmp: Use &error_abort for programming errors
  target/microblaze: Explode MO_TExx -> MO_TE | MO_xx
  target/microblaze: Set MO_TE once in do_load() / do_store()
  target/microblaze: Introduce mo_endian() helper
  target/microblaze: Consider endianness while translating code
  hw/microblaze: Support various endianness for s3adsp1800 machines
  tests/functional: Explicit endianness of microblaze assets
  tests/functional: Add microblaze cross-endianness tests

 hw/microblaze/boot.h                          |  4 +-
 include/hw/ssi/xilinx_spips.h                 |  1 +
 target/microblaze/cpu.h                       |  7 +++
 hw/arm/xilinx_zynq.c                          |  1 +
 hw/arm/xlnx-zynqmp.c                          | 40 +++++--------
 hw/char/xilinx_uartlite.c                     | 31 ++++++----
 hw/intc/xilinx_intc.c                         | 50 ++++++++++++----
 hw/microblaze/boot.c                          |  8 +--
 hw/microblaze/petalogix_ml605_mmu.c           |  4 +-
 hw/microblaze/petalogix_s3adsp1800_mmu.c      | 58 ++++++++++++++++---
 hw/microblaze/xlnx-zynqmp-pmu.c               |  2 +-
 hw/net/xilinx_ethlite.c                       | 42 +++++++++-----
 hw/ppc/virtex_ml507.c                         |  1 +
 hw/ssi/xilinx_spi.c                           | 24 +++++---
 hw/ssi/xilinx_spips.c                         | 36 +++++++-----
 hw/timer/xilinx_timer.c                       | 33 +++++++----
 target/microblaze/translate.c                 | 49 ++++++++++------
 .../functional/test_microblaze_s3adsp1800.py  | 27 ++++++++-
 .../test_microblazeel_s3adsp1800.py           | 25 +++++++-
 19 files changed, 309 insertions(+), 134 deletions(-)

-- 
2.45.2

[PATCH v3 01/17] hw/microblaze: Restrict MemoryRegionOps are implemented as 32-bit

[Philippe Mathieu-Daudé]

All these MemoryRegionOps read() and write() handlers are
implemented expecting 32-bit accesses. Clarify that setting
.impl.min/max_access_size fields.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20241105130431.22564-8-philmd@linaro.org>
---
 hw/char/xilinx_uartlite.c | 4 ++++
 hw/intc/xilinx_intc.c     | 4 ++++
 hw/net/xilinx_ethlite.c   | 4 ++++
 hw/timer/xilinx_timer.c   | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/hw/char/xilinx_uartlite.c b/hw/char/xilinx_uartlite.c
index f325084f8b..3022b3d8ef 100644
--- a/hw/char/xilinx_uartlite.c
+++ b/hw/char/xilinx_uartlite.c
@@ -170,6 +170,10 @@ static const MemoryRegionOps uart_ops = {
     .read = uart_read,
     .write = uart_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
     .valid = {
         .min_access_size = 1,
         .max_access_size = 4
diff --git a/hw/intc/xilinx_intc.c b/hw/intc/xilinx_intc.c
index 6e5012e66e..8fb6b4f1a5 100644
--- a/hw/intc/xilinx_intc.c
+++ b/hw/intc/xilinx_intc.c
@@ -144,6 +144,10 @@ static const MemoryRegionOps pic_ops = {
     .read = pic_read,
     .write = pic_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4
diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c
index bd81290808..e84b4cdd35 100644
--- a/hw/net/xilinx_ethlite.c
+++ b/hw/net/xilinx_ethlite.c
@@ -170,6 +170,10 @@ static const MemoryRegionOps eth_ops = {
     .read = eth_read,
     .write = eth_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4
diff --git a/hw/timer/xilinx_timer.c b/hw/timer/xilinx_timer.c
index 32a9df69e0..383fc8b3c8 100644
--- a/hw/timer/xilinx_timer.c
+++ b/hw/timer/xilinx_timer.c
@@ -193,6 +193,10 @@ static const MemoryRegionOps timer_ops = {
     .read = timer_read,
     .write = timer_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4
-- 
2.45.2

[PATCH v3 02/17] hw/microblaze: Propagate CPU endianness to microblaze_load_kernel()

[Philippe Mathieu-Daudé]

Pass vCPU endianness as argument so we can load kernels
with different endianness (different from the qemu-system-binary
builtin one).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/microblaze/boot.h                     | 4 ++--
 hw/microblaze/boot.c                     | 8 ++++----
 hw/microblaze/petalogix_ml605_mmu.c      | 2 +-
 hw/microblaze/petalogix_s3adsp1800_mmu.c | 2 +-
 hw/microblaze/xlnx-zynqmp-pmu.c          | 2 +-
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/hw/microblaze/boot.h b/hw/microblaze/boot.h
index 5a8c2f7975..d179a551a6 100644
--- a/hw/microblaze/boot.h
+++ b/hw/microblaze/boot.h
@@ -2,8 +2,8 @@
 #define MICROBLAZE_BOOT_H
 
 
-void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
-                            uint32_t ramsize,
+void microblaze_load_kernel(MicroBlazeCPU *cpu, bool is_little_endian,
+                            hwaddr ddr_base, uint32_t ramsize,
                             const char *initrd_filename,
                             const char *dtb_filename,
                             void (*machine_cpu_reset)(MicroBlazeCPU *));
diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c
index ed61e483ee..3675489fa5 100644
--- a/hw/microblaze/boot.c
+++ b/hw/microblaze/boot.c
@@ -114,8 +114,8 @@ static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
     return addr - 0x30000000LL;
 }
 
-void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
-                            uint32_t ramsize,
+void microblaze_load_kernel(MicroBlazeCPU *cpu, bool is_little_endian,
+                            hwaddr ddr_base, uint32_t ramsize,
                             const char *initrd_filename,
                             const char *dtb_filename,
                             void (*machine_cpu_reset)(MicroBlazeCPU *))
@@ -144,13 +144,13 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
         /* Boots a kernel elf binary.  */
         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
                                &entry, NULL, &high, NULL,
-                               TARGET_BIG_ENDIAN, EM_MICROBLAZE, 0, 0);
+                               !is_little_endian, EM_MICROBLAZE, 0, 0);
         base32 = entry;
         if (base32 == 0xc0000000) {
             kernel_size = load_elf(kernel_filename, NULL,
                                    translate_kernel_address, NULL,
                                    &entry, NULL, NULL, NULL,
-                                   TARGET_BIG_ENDIAN, EM_MICROBLAZE, 0, 0);
+                                   !is_little_endian, EM_MICROBLAZE, 0, 0);
         }
         /* Always boot into physical ram.  */
         boot_info.bootstrap_pc = (uint32_t)entry;
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 61e47d8398..d2b2109065 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -204,7 +204,7 @@ petalogix_ml605_init(MachineState *machine)
     cpu->cfg.pvr_regs[5] = 0xc56be000;
     cpu->cfg.pvr_regs[10] = 0x0e000000; /* virtex 6 */
 
-    microblaze_load_kernel(cpu, MEMORY_BASEADDR, ram_size,
+    microblaze_load_kernel(cpu, true, MEMORY_BASEADDR, ram_size,
                            machine->initrd_filename,
                            BINARY_DEVICE_TREE_FILE,
                            NULL);
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index 6c0f5c6c65..8110be8371 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -129,7 +129,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
 
     create_unimplemented_device("xps_gpio", GPIO_BASEADDR, 0x10000);
 
-    microblaze_load_kernel(cpu, ddr_base, ram_size,
+    microblaze_load_kernel(cpu, !TARGET_BIG_ENDIAN, ddr_base, ram_size,
                            machine->initrd_filename,
                            BINARY_DEVICE_TREE_FILE,
                            NULL);
diff --git a/hw/microblaze/xlnx-zynqmp-pmu.c b/hw/microblaze/xlnx-zynqmp-pmu.c
index 567aad47bf..bdbf7328bf 100644
--- a/hw/microblaze/xlnx-zynqmp-pmu.c
+++ b/hw/microblaze/xlnx-zynqmp-pmu.c
@@ -172,7 +172,7 @@ static void xlnx_zynqmp_pmu_init(MachineState *machine)
     qdev_realize(DEVICE(pmu), NULL, &error_fatal);
 
     /* Load the kernel */
-    microblaze_load_kernel(&pmu->cpu, XLNX_ZYNQMP_PMU_RAM_ADDR,
+    microblaze_load_kernel(&pmu->cpu, true, XLNX_ZYNQMP_PMU_RAM_ADDR,
                            machine->ram_size,
                            machine->initrd_filename,
                            machine->dtb,
-- 
2.45.2

[PATCH v3 03/17] hw/intc/xilinx_intc: Make device endianness configurable

[Philippe Mathieu-Daudé]

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness for each machine using the device.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/intc/xilinx_intc.c                    | 52 +++++++++++++++++-------
 hw/microblaze/petalogix_ml605_mmu.c      |  1 +
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 3 files changed, 40 insertions(+), 14 deletions(-)

diff --git a/hw/intc/xilinx_intc.c b/hw/intc/xilinx_intc.c
index 8fb6b4f1a5..fc55c8afca 100644
--- a/hw/intc/xilinx_intc.c
+++ b/hw/intc/xilinx_intc.c
@@ -3,6 +3,9 @@
  *
  * Copyright (c) 2009 Edgar E. Iglesias.
  *
+ * https://docs.amd.com/v/u/en-US/xps_intc
+ * DS572: LogiCORE IP XPS Interrupt Controller (v2.01a)
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
@@ -49,6 +52,7 @@ struct XpsIntc
 {
     SysBusDevice parent_obj;
 
+    bool little_endian_model;
     MemoryRegion mmio;
     qemu_irq parent_irq;
 
@@ -140,18 +144,29 @@ static void pic_write(void *opaque, hwaddr addr,
     update_irq(p);
 }
 
-static const MemoryRegionOps pic_ops = {
-    .read = pic_read,
-    .write = pic_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps pic_ops[2] = {
+    [0 ... 1] = {
+        .read = pic_read,
+        .write = pic_write,
+        .endianness = DEVICE_BIG_ENDIAN,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            /*
+             * All XPS INTC registers are accessed through the PLB interface.
+             * The base address for these registers is provided by the
+             * configuration parameter, C_BASEADDR. Each register is 32 bits
+             * although some bits may be unused and is accessed on a 4-byte
+             * boundary offset from the base address.
+             */
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
     },
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static void irq_handler(void *opaque, int irq, int level)
@@ -174,13 +189,21 @@ static void xilinx_intc_init(Object *obj)
 
     qdev_init_gpio_in(DEVICE(obj), irq_handler, 32);
     sysbus_init_irq(SYS_BUS_DEVICE(obj), &p->parent_irq);
-
-    memory_region_init_io(&p->mmio, obj, &pic_ops, p, "xlnx.xps-intc",
-                          R_MAX * 4);
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &p->mmio);
 }
 
+static void xilinx_intc_realize(DeviceState *dev, Error **errp)
+{
+    XpsIntc *p = XILINX_INTC(dev);
+
+    memory_region_init_io(&p->mmio, OBJECT(dev),
+                          &pic_ops[p->little_endian_model],
+                          p, "xlnx.xps-intc",
+                          R_MAX * 4);
+}
+
 static Property xilinx_intc_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XpsIntc, little_endian_model, true),
     DEFINE_PROP_UINT32("kind-of-intr", XpsIntc, c_kind_of_intr, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
@@ -189,6 +212,7 @@ static void xilinx_intc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    dc->realize = xilinx_intc_realize;
     device_class_set_props(dc, xilinx_intc_properties);
 }
 
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index d2b2109065..64e8cadbee 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -111,6 +111,7 @@ petalogix_ml605_init(MachineState *machine)
 
 
     dev = qdev_new("xlnx.xps-intc");
+    qdev_prop_set_bit(dev, "little-endian", true);
     qdev_prop_set_uint32(dev, "kind-of-intr", 1 << TIMER_IRQ);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, INTC_BASEADDR);
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index 8110be8371..af949196d3 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -95,6 +95,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
                           64 * KiB, 1, 0x89, 0x18, 0x0000, 0x0, 1);
 
     dev = qdev_new("xlnx.xps-intc");
+    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
     qdev_prop_set_uint32(dev, "kind-of-intr",
                          1 << ETHLITE_IRQ | 1 << UARTLITE_IRQ);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
-- 
2.45.2

[RFC PATCH v3 04/17] hw/net/xilinx_ethlite: Simplify by having configurable endianness

[Philippe Mathieu-Daudé]

The Xilinx 'ethlite' device was added in commit b43848a100
("xilinx: Add ethlite emulation"), being only built back
then for a big-endian MicroBlaze target (see commit 72b675caac
"microblaze: Hook into the build-system").

I/O endianness access was then clarified in commit d48751ed4f
("xilinx-ethlite: Simplify byteswapping to/from brams"). Here
the 'fix' was to use tswap32(). Since the machine was built as
big-endian target, tswap32() use means the fix was for a little
endian host. While the datasheet (reference added in file header)
is not precise about it, we interpret such change as the device
expects accesses in big-endian order.

Instead of having a double swapping, one in the core memory layer
due to DEVICE_NATIVE_ENDIAN and a second one with the tswap calls,
allow the machine code to select the proper endianness desired,
removing the need of tswap().

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair of
DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device endianness,
defaulting to little endian.
Set the proper endianness on the single machine using the device.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
RFC until I digest Paolo's review from v1:
https://lore.kernel.org/qemu-devel/34f6fe2f-06e0-4e2a-a361-2d662f6814b5@redhat.com/
---
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 hw/net/xilinx_ethlite.c                  | 44 +++++++++++++++---------
 2 files changed, 28 insertions(+), 17 deletions(-)

diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index af949196d3..f02d343e29 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -121,6 +121,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[TIMER_IRQ]);
 
     dev = qdev_new("xlnx.xps-ethernetlite");
+    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
     qemu_configure_nic_device(dev, true, NULL);
     qdev_prop_set_uint32(dev, "tx-ping-pong", 0);
     qdev_prop_set_uint32(dev, "rx-ping-pong", 0);
diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c
index e84b4cdd35..5c27f1250d 100644
--- a/hw/net/xilinx_ethlite.c
+++ b/hw/net/xilinx_ethlite.c
@@ -3,6 +3,9 @@
  *
  * Copyright (c) 2009 Edgar E. Iglesias.
  *
+ * DS580: https://docs.amd.com/v/u/en-US/xps_ethernetlite
+ * LogiCORE IP XPS Ethernet Lite Media Access Controller
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
@@ -25,7 +28,6 @@
 #include "qemu/osdep.h"
 #include "qemu/module.h"
 #include "qom/object.h"
-#include "exec/tswap.h"
 #include "hw/sysbus.h"
 #include "hw/irq.h"
 #include "hw/qdev-properties.h"
@@ -60,6 +62,7 @@ struct xlx_ethlite
 {
     SysBusDevice parent_obj;
 
+    bool little_endian_model;
     MemoryRegion mmio;
     qemu_irq irq;
     NICState *nic;
@@ -103,9 +106,10 @@ eth_read(void *opaque, hwaddr addr, unsigned int size)
             break;
 
         default:
-            r = tswap32(s->regs[addr]);
+            r = s->regs[addr];
             break;
     }
+
     return r;
 }
 
@@ -161,23 +165,26 @@ eth_write(void *opaque, hwaddr addr,
             break;
 
         default:
-            s->regs[addr] = tswap32(value);
+            s->regs[addr] = value;
             break;
     }
 }
 
-static const MemoryRegionOps eth_ops = {
-    .read = eth_read,
-    .write = eth_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps eth_ops[2] = {
+    [0 ... 1] = {
+        .read = eth_read,
+        .write = eth_write,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
     },
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static bool eth_can_rx(NetClientState *nc)
@@ -237,6 +244,10 @@ static void xilinx_ethlite_realize(DeviceState *dev, Error **errp)
 {
     struct xlx_ethlite *s = XILINX_ETHLITE(dev);
 
+    memory_region_init_io(&s->mmio, OBJECT(dev),
+                          &eth_ops[s->little_endian_model], s,
+                          "xlnx.xps-ethernetlite", R_MAX * 4);
+
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
     s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf,
                           object_get_typename(OBJECT(dev)), dev->id,
@@ -249,13 +260,12 @@ static void xilinx_ethlite_init(Object *obj)
     struct xlx_ethlite *s = XILINX_ETHLITE(obj);
 
     sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
-
-    memory_region_init_io(&s->mmio, obj, &eth_ops, s,
-                          "xlnx.xps-ethernetlite", R_MAX * 4);
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
 static Property xilinx_ethlite_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", struct xlx_ethlite,
+                     little_endian_model, true),
     DEFINE_PROP_UINT32("tx-ping-pong", struct xlx_ethlite, c_tx_pingpong, 1),
     DEFINE_PROP_UINT32("rx-ping-pong", struct xlx_ethlite, c_rx_pingpong, 1),
     DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf),
-- 
2.45.2

Re: [RFC PATCH v3 04/17] hw/net/xilinx_ethlite: Simplify by having configurable endianness

[Paolo Bonzini]

On 11/8/24 16:43, Philippe Mathieu-Daudé wrote:
> The Xilinx 'ethlite' device was added in commit b43848a100
> ("xilinx: Add ethlite emulation"), being only built back
> then for a big-endian MicroBlaze target (see commit 72b675caac
> "microblaze: Hook into the build-system").
> 
> I/O endianness access was then clarified in commit d48751ed4f
> ("xilinx-ethlite: Simplify byteswapping to/from brams"). Here
> the 'fix' was to use tswap32(). Since the machine was built as
> big-endian target, tswap32() use means the fix was for a little
> endian host. While the datasheet (reference added in file header)
> is not precise about it, we interpret such change as the device
> expects accesses in big-endian order.
> 
> Instead of having a double swapping, one in the core memory layer
> due to DEVICE_NATIVE_ENDIAN and a second one with the tswap calls,
> allow the machine code to select the proper endianness desired,
> removing the need of tswap().
> 
> Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair of
> DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
> Add the "little-endian" property to select the device endianness,
> defaulting to little endian.
> Set the proper endianness on the single machine using the device.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
> RFC until I digest Paolo's review from v1:
> https://lore.kernel.org/qemu-devel/34f6fe2f-06e0-4e2a-a361-2d662f6814b5@redhat.com/

tl;dr: this works but would break migration compatibility with the 
previous version.  If you want to keep that, you need to add

> -            r = tswap32(s->regs[addr]);
> +            r = s->regs[addr];

if (s->little_endian_model)
	r = cpu_to_le32(r);
else
	r = cpu_to_be32(r);


> @@ -161,23 +165,26 @@ eth_write(void *opaque, hwaddr addr,
>               break;
>   
>           default:

if (s->little_endian_model)
	r = le32_to_cpu(r);
else
	r = be32_to_cpu(r);

> -            s->regs[addr] = tswap32(value);
> +            s->regs[addr] = value;
>               break;

These pairs ensure that RAM goes through an even number of swaps.  I 
don't think they are needed but you decide.

However, I am wondering if the double MemoryRegionOps are needed *at 
all*.  Since petalogix is arguably a little-endian only machine, can you 
just use DEVICE_LITTLE_ENDIAN?

Paolo

Re: [RFC PATCH v3 04/17] hw/net/xilinx_ethlite: Simplify by having configurable endianness

[Philippe Mathieu-Daudé]

On 8/11/24 16:05, Paolo Bonzini wrote:
> On 11/8/24 16:43, Philippe Mathieu-Daudé wrote:
>> The Xilinx 'ethlite' device was added in commit b43848a100
>> ("xilinx: Add ethlite emulation"), being only built back
>> then for a big-endian MicroBlaze target (see commit 72b675caac
>> "microblaze: Hook into the build-system").
>>
>> I/O endianness access was then clarified in commit d48751ed4f
>> ("xilinx-ethlite: Simplify byteswapping to/from brams"). Here
>> the 'fix' was to use tswap32(). Since the machine was built as
>> big-endian target, tswap32() use means the fix was for a little
>> endian host. While the datasheet (reference added in file header)
>> is not precise about it, we interpret such change as the device
>> expects accesses in big-endian order.
>>
>> Instead of having a double swapping, one in the core memory layer
>> due to DEVICE_NATIVE_ENDIAN and a second one with the tswap calls,
>> allow the machine code to select the proper endianness desired,
>> removing the need of tswap().
>>
>> Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair of
>> DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
>> Add the "little-endian" property to select the device endianness,
>> defaulting to little endian.
>> Set the proper endianness on the single machine using the device.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>> RFC until I digest Paolo's review from v1:
>> https://lore.kernel.org/qemu-devel/34f6fe2f-06e0-4e2a-a361-2d662f6814b5@redhat.com/
> 
> tl;dr: this works but would break migration compatibility with the 
> previous version.  If you want to keep that, you need to add
> 
>> -            r = tswap32(s->regs[addr]);
>> +            r = s->regs[addr];
> 
> if (s->little_endian_model)
>      r = cpu_to_le32(r);
> else
>      r = cpu_to_be32(r);
> 
> 
>> @@ -161,23 +165,26 @@ eth_write(void *opaque, hwaddr addr,
>>               break;
>>           default:
> 
> if (s->little_endian_model)
>      r = le32_to_cpu(r);
> else
>      r = be32_to_cpu(r);
> 
>> -            s->regs[addr] = tswap32(value);
>> +            s->regs[addr] = value;
>>               break;
> 
> These pairs ensure that RAM goes through an even number of swaps.  I 
> don't think they are needed but you decide.

Indeed; I didn't realize it was RAM.

> However, I am wondering if the double MemoryRegionOps are needed *at 
> all*.  Since petalogix is arguably a little-endian only machine, can you 
> just use DEVICE_LITTLE_ENDIAN?

1/ This petalogix machine is actually built in the big-endian binary
2/ As Edgar mentioned elsewhere, Petalogic IP can be synthetized as
    big-endian
3/ This machine is used to prove we can remove the TARGET_BIG_ENDIAN
    definition and unify big/little endian binaries in our build system.

[RFC PATCH v3 05/17] hw/timer/xilinx_timer: Allow down to 8-bit memory access

[Philippe Mathieu-Daudé]

Allow down to 8-bit access, per the datasheet (reference added
in previous commit):

 "Timer Counter registers are accessed as one of the following types:
  • Byte (8 bits)
  • Half word (2 bytes)
  • Word (4 bytes)"

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
---
RFC: This breaks the UART qtest, instead of having TX register
receiving 'T' = 0x54, it receives 0x54000000, converted to '\0'
char. It works if we use SWI instead of SBI (storing 32-bit).
---
 hw/timer/xilinx_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/timer/xilinx_timer.c b/hw/timer/xilinx_timer.c
index 383fc8b3c8..c117bff225 100644
--- a/hw/timer/xilinx_timer.c
+++ b/hw/timer/xilinx_timer.c
@@ -198,7 +198,7 @@ static const MemoryRegionOps timer_ops = {
         .max_access_size = 4,
     },
     .valid = {
-        .min_access_size = 4,
+        .min_access_size = 1,
         .max_access_size = 4
     }
 };
-- 
2.45.2

[PATCH v3 06/17] hw/timer/xilinx_timer: Make device endianness configurable

[Philippe Mathieu-Daudé]

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness for each machine using the device.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/microblaze/petalogix_ml605_mmu.c      |  1 +
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 hw/ppc/virtex_ml507.c                    |  1 +
 hw/timer/xilinx_timer.c                  | 35 +++++++++++++++---------
 4 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 64e8cadbee..f4ec983fee 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -127,6 +127,7 @@ petalogix_ml605_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 100 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_bit(dev, "little-endian", true);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 100 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index f02d343e29..10d9713150 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -114,6 +114,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
index f378e5c4a9..ea0b3a56fe 100644
--- a/hw/ppc/virtex_ml507.c
+++ b/hw/ppc/virtex_ml507.c
@@ -230,6 +230,7 @@ static void virtex_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
+    qdev_prop_set_bit(dev, "little-endian", false);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
diff --git a/hw/timer/xilinx_timer.c b/hw/timer/xilinx_timer.c
index c117bff225..5bfb7e3929 100644
--- a/hw/timer/xilinx_timer.c
+++ b/hw/timer/xilinx_timer.c
@@ -3,6 +3,9 @@
  *
  * Copyright (c) 2009 Edgar E. Iglesias.
  *
+ * DS573: https://docs.amd.com/v/u/en-US/xps_timer
+ * LogiCORE IP XPS Timer/Counter (v1.02a)
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
@@ -69,6 +72,7 @@ struct XpsTimerState
 {
     SysBusDevice parent_obj;
 
+    bool little_endian_model;
     MemoryRegion mmio;
     qemu_irq irq;
     uint8_t one_timer_only;
@@ -189,18 +193,21 @@ timer_write(void *opaque, hwaddr addr,
     timer_update_irq(t);
 }
 
-static const MemoryRegionOps timer_ops = {
-    .read = timer_read,
-    .write = timer_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps timer_ops[2] = {
+    [0 ... 1] = {
+        .read = timer_read,
+        .write = timer_write,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 1,
+            .max_access_size = 4,
+        },
     },
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static void timer_hit(void *opaque)
@@ -233,8 +240,9 @@ static void xilinx_timer_realize(DeviceState *dev, Error **errp)
         ptimer_transaction_commit(xt->ptimer);
     }
 
-    memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t, "xlnx.xps-timer",
-                          R_MAX * 4 * num_timers(t));
+    memory_region_init_io(&t->mmio, OBJECT(t),
+                          &timer_ops[t->little_endian_model], t,
+                          "xlnx.xps-timer", R_MAX * 4 * num_timers(t));
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &t->mmio);
 }
 
@@ -247,6 +255,7 @@ static void xilinx_timer_init(Object *obj)
 }
 
 static Property xilinx_timer_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XpsTimerState, little_endian_model, true),
     DEFINE_PROP_UINT32("clock-frequency", XpsTimerState, freq_hz, 62 * 1000000),
     DEFINE_PROP_UINT8("one-timer-only", XpsTimerState, one_timer_only, 0),
     DEFINE_PROP_END_OF_LIST(),
-- 
2.45.2

[PATCH v3 07/17] hw/char/xilinx_uartlite: Make device endianness configurable

[Philippe Mathieu-Daudé]

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness on the single machine using the
device.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/char/xilinx_uartlite.c                | 33 ++++++++++++++----------
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/hw/char/xilinx_uartlite.c b/hw/char/xilinx_uartlite.c
index 3022b3d8ef..a7dd30f90f 100644
--- a/hw/char/xilinx_uartlite.c
+++ b/hw/char/xilinx_uartlite.c
@@ -57,6 +57,7 @@
 struct XilinxUARTLite {
     SysBusDevice parent_obj;
 
+    bool little_endian_model;
     MemoryRegion mmio;
     CharBackend chr;
     qemu_irq irq;
@@ -166,21 +167,25 @@ uart_write(void *opaque, hwaddr addr,
     uart_update_irq(s);
 }
 
-static const MemoryRegionOps uart_ops = {
-    .read = uart_read,
-    .write = uart_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps uart_ops[2] = {
+    [0 ... 1] = {
+        .read = uart_read,
+        .write = uart_write,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 1,
+            .max_access_size = 4,
+        },
     },
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static Property xilinx_uartlite_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XilinxUARTLite, little_endian_model, true),
     DEFINE_PROP_CHR("chardev", XilinxUARTLite, chr),
     DEFINE_PROP_END_OF_LIST(),
 };
@@ -219,6 +224,9 @@ static void xilinx_uartlite_realize(DeviceState *dev, Error **errp)
 {
     XilinxUARTLite *s = XILINX_UARTLITE(dev);
 
+    memory_region_init_io(&s->mmio, OBJECT(dev),
+                          &uart_ops[s->little_endian_model],
+                          s, "xlnx.xps-uartlite", R_MAX * 4);
     qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx,
                              uart_event, NULL, s, NULL, true);
 }
@@ -228,9 +236,6 @@ static void xilinx_uartlite_init(Object *obj)
     XilinxUARTLite *s = XILINX_UARTLITE(obj);
 
     sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
-
-    memory_region_init_io(&s->mmio, obj, &uart_ops, s,
-                          "xlnx.xps-uartlite", R_MAX * 4);
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 }
 
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index 10d9713150..2d2b3c9bca 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -107,6 +107,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
     }
 
     dev = qdev_new(TYPE_XILINX_UARTLITE);
+    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
     qdev_prop_set_chr(dev, "chardev", serial_hd(0));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, UARTLITE_BASEADDR);
-- 
2.45.2

[PATCH v3 08/17] hw/ssi/xilinx_spi: Make device endianness configurable

[Philippe Mathieu-Daudé]

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness on the single machine using the
device.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/xlnx-zynqmp.c |  4 ++++
 hw/ssi/xilinx_spi.c  | 24 +++++++++++++++---------
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index ab2d50e31b..e735dbdf82 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -714,6 +714,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
         gchar *bus_name;
 
+        if (!object_property_set_bool(OBJECT(&s->spi[i])), "little-endian",
+                                      true, errp)) {
+            return;
+        }
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
             return;
         }
diff --git a/hw/ssi/xilinx_spi.c b/hw/ssi/xilinx_spi.c
index 7f1e1808c5..8926ffb927 100644
--- a/hw/ssi/xilinx_spi.c
+++ b/hw/ssi/xilinx_spi.c
@@ -83,6 +83,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(XilinxSPI, XILINX_SPI)
 struct XilinxSPI {
     SysBusDevice parent_obj;
 
+    bool little_endian_model;
     MemoryRegion mmio;
 
     qemu_irq irq;
@@ -313,14 +314,17 @@ done:
     xlx_spi_update_irq(s);
 }
 
-static const MemoryRegionOps spi_ops = {
-    .read = spi_read,
-    .write = spi_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4
-    }
+static const MemoryRegionOps spi_ops[2] = {
+    [0 ... 1] = {
+        .read = spi_read,
+        .write = spi_write,
+        .valid = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+    },
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static void xilinx_spi_realize(DeviceState *dev, Error **errp)
@@ -339,7 +343,8 @@ static void xilinx_spi_realize(DeviceState *dev, Error **errp)
         sysbus_init_irq(sbd, &s->cs_lines[i]);
     }
 
-    memory_region_init_io(&s->mmio, OBJECT(s), &spi_ops, s,
+    memory_region_init_io(&s->mmio, OBJECT(s),
+                          &spi_ops[s->little_endian_model], s,
                           "xilinx-spi", R_MAX * 4);
     sysbus_init_mmio(sbd, &s->mmio);
 
@@ -362,6 +367,7 @@ static const VMStateDescription vmstate_xilinx_spi = {
 };
 
 static Property xilinx_spi_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XilinxSPI, little_endian_model, true),
     DEFINE_PROP_UINT8("num-ss-bits", XilinxSPI, num_cs, 1),
     DEFINE_PROP_END_OF_LIST(),
 };
-- 
2.45.2

[PATCH v3 09/17] hw/ssi/xilinx_spips: Make device endianness configurable

[Philippe Mathieu-Daudé]

Replace the DEVICE_NATIVE_ENDIAN MemoryRegionOps by a pair
of DEVICE_LITTLE_ENDIAN / DEVICE_BIG_ENDIAN.
Add the "little-endian" property to select the device
endianness, defaulting to little endian.
Set the proper endianness on the single machine using the
device.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/ssi/xilinx_spips.h |  1 +
 hw/arm/xilinx_zynq.c          |  1 +
 hw/ssi/xilinx_spips.c         | 36 ++++++++++++++++++++++-------------
 3 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/include/hw/ssi/xilinx_spips.h b/include/hw/ssi/xilinx_spips.h
index 7a754bf67a..5d2cf6c7d7 100644
--- a/include/hw/ssi/xilinx_spips.h
+++ b/include/hw/ssi/xilinx_spips.h
@@ -91,6 +91,7 @@ struct XilinxSPIPS {
 struct XilinxQSPIPS {
     XilinxSPIPS parent_obj;
 
+    bool little_endian_model;
     uint8_t lqspi_buf[LQSPI_CACHE_SIZE];
     hwaddr lqspi_cached_addr;
     Error *migration_blocker;
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index fde4d946b7..bcc0022c17 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -142,6 +142,7 @@ static inline int zynq_init_spi_flashes(uint32_t base_addr, qemu_irq irq,
     int num_ss = is_qspi ? NUM_QSPI_FLASHES : NUM_SPI_FLASHES;
 
     dev = qdev_new(is_qspi ? "xlnx.ps7-qspi" : "xlnx.ps7-spi");
+    qdev_prop_set_bit(dev, "little-endian", true);
     qdev_prop_set_uint8(dev, "num-txrx-bytes", is_qspi ? 4 : 1);
     qdev_prop_set_uint8(dev, "num-ss-bits", num_ss);
     qdev_prop_set_uint8(dev, "num-busses", num_busses);
diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index aeb462c3ce..72929776e2 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -1251,18 +1251,21 @@ static MemTxResult lqspi_write(void *opaque, hwaddr offset, uint64_t value,
     return MEMTX_ERROR;
 }
 
-static const MemoryRegionOps lqspi_ops = {
-    .read_with_attrs = lqspi_read,
-    .write_with_attrs = lqspi_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
+static const MemoryRegionOps lqspi_ops[2] = {
+    [0 ... 1] = {
+        .read_with_attrs = lqspi_read,
+        .write_with_attrs = lqspi_write,
+        .impl = {
+            .min_access_size = 4,
+            .max_access_size = 4,
+        },
+        .valid = {
+            .min_access_size = 1,
+            .max_access_size = 4
+        },
     },
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 4
-    }
+    [0].endianness = DEVICE_BIG_ENDIAN,
+    [1].endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static void xilinx_spips_realize(DeviceState *dev, Error **errp)
@@ -1325,8 +1328,9 @@ static void xilinx_qspips_realize(DeviceState *dev, Error **errp)
     s->num_txrx_bytes = 4;
 
     xilinx_spips_realize(dev, errp);
-    memory_region_init_io(&s->mmlqspi, OBJECT(s), &lqspi_ops, s, "lqspi",
-                          (1 << LQSPI_ADDRESS_BITS) * 2);
+    memory_region_init_io(&s->mmlqspi, OBJECT(s),
+                          &lqspi_ops[q->little_endian_model],
+                          s, "lqspi", (1 << LQSPI_ADDRESS_BITS) * 2);
     sysbus_init_mmio(sbd, &s->mmlqspi);
 
     q->lqspi_cached_addr = ~0ULL;
@@ -1432,12 +1436,18 @@ static Property xilinx_spips_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static Property xilinx_qspips_properties[] = {
+    DEFINE_PROP_BOOL("little-endian", XilinxQSPIPS, little_endian_model, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
 
     dc->realize = xilinx_qspips_realize;
+    device_class_set_props(dc, xilinx_qspips_properties);
     xsc->reg_ops = &qspips_ops;
     xsc->reg_size = XLNX_SPIPS_R_MAX * 4;
     xsc->rx_fifo_size = RXFF_A_Q;
-- 
2.45.2

[PATCH v3 10/17] hw/arm/xlnx-zynqmp: Use &error_abort for programming errors

[Philippe Mathieu-Daudé]

When a property value is static (not provided by QMP or CLI),
error shouldn't happen, otherwise it is a programming error.
Therefore simplify and use &error_abort as this can't fail.

Reported-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/xlnx-zynqmp.c | 44 ++++++++++++++------------------------------
 1 file changed, 14 insertions(+), 30 deletions(-)

diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index e735dbdf82..1770fb5402 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -689,16 +689,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
          * - SDIO Specification Version 3.0
          * - eMMC Specification Version 4.51
          */
-        if (!object_property_set_uint(sdhci, "sd-spec-version", 3, errp)) {
-            return;
-        }
-        if (!object_property_set_uint(sdhci, "capareg", SDHCI_CAPABILITIES,
-                                      errp)) {
-            return;
-        }
-        if (!object_property_set_uint(sdhci, "uhs", UHS_I, errp)) {
-            return;
-        }
+        object_property_set_uint(sdhci, "sd-spec-version", 3, &error_abort);
+        object_property_set_uint(sdhci, "capareg", SDHCI_CAPABILITIES,
+                                 &error_abort);
+        object_property_set_uint(sdhci, "uhs", UHS_I, &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(sdhci), errp)) {
             return;
         }
@@ -714,10 +708,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
         gchar *bus_name;
 
-        if (!object_property_set_bool(OBJECT(&s->spi[i])), "little-endian",
-                                      true, errp)) {
-            return;
-        }
+        object_property_set_bool(OBJECT(&s->spi[i]), "little-endian",
+                                 true, &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
             return;
         }
@@ -767,14 +759,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     xlnx_zynqmp_create_unimp_mmio(s);
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_GDMA_CH; i++) {
-        if (!object_property_set_uint(OBJECT(&s->gdma[i]), "bus-width", 128,
-                                      errp)) {
-            return;
-        }
-        if (!object_property_set_link(OBJECT(&s->gdma[i]), "dma",
-                                      OBJECT(system_memory), errp)) {
-            return;
-        }
+        object_property_set_uint(OBJECT(&s->gdma[i]), "bus-width", 128,
+                                 &error_abort);
+        object_property_set_link(OBJECT(&s->gdma[i]), "dma",
+                                 OBJECT(system_memory), &error_abort);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gdma[i]), errp)) {
             return;
         }
@@ -815,10 +803,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi_dma), 0,
                        qdev_get_gpio_in(DEVICE(&s->qspi_irq_orgate), 0));
 
-    if (!object_property_set_link(OBJECT(&s->qspi), "stream-connected-dma",
-                                  OBJECT(&s->qspi_dma), errp)) {
-         return;
-    }
+    object_property_set_link(OBJECT(&s->qspi), "stream-connected-dma",
+                             OBJECT(&s->qspi_dma), &error_abort);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->qspi), errp)) {
         return;
     }
@@ -837,10 +823,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_USB; i++) {
-        if (!object_property_set_link(OBJECT(&s->usb[i].sysbus_xhci), "dma",
-                                      OBJECT(system_memory), errp)) {
-            return;
-        }
+        object_property_set_link(OBJECT(&s->usb[i].sysbus_xhci), "dma",
+                                 OBJECT(system_memory), &error_abort);
 
         qdev_prop_set_uint32(DEVICE(&s->usb[i].sysbus_xhci), "intrs", 4);
         qdev_prop_set_uint32(DEVICE(&s->usb[i].sysbus_xhci), "slots", 2);
-- 
2.45.2

Re: [PATCH v3 10/17] hw/arm/xlnx-zynqmp: Use &error_abort for programming errors

[Philippe Mathieu-Daudé]

ping for trivial review?

On 8/11/24 16:43, Philippe Mathieu-Daudé wrote:
> When a property value is static (not provided by QMP or CLI),
> error shouldn't happen, otherwise it is a programming error.
> Therefore simplify and use &error_abort as this can't fail.
> 
> Reported-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/arm/xlnx-zynqmp.c | 44 ++++++++++++++------------------------------
>   1 file changed, 14 insertions(+), 30 deletions(-)
> 
> diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
> index e735dbdf82..1770fb5402 100644
> --- a/hw/arm/xlnx-zynqmp.c
> +++ b/hw/arm/xlnx-zynqmp.c
> @@ -689,16 +689,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>            * - SDIO Specification Version 3.0
>            * - eMMC Specification Version 4.51
>            */
> -        if (!object_property_set_uint(sdhci, "sd-spec-version", 3, errp)) {
> -            return;
> -        }
> -        if (!object_property_set_uint(sdhci, "capareg", SDHCI_CAPABILITIES,
> -                                      errp)) {
> -            return;
> -        }
> -        if (!object_property_set_uint(sdhci, "uhs", UHS_I, errp)) {
> -            return;
> -        }
> +        object_property_set_uint(sdhci, "sd-spec-version", 3, &error_abort);
> +        object_property_set_uint(sdhci, "capareg", SDHCI_CAPABILITIES,
> +                                 &error_abort);
> +        object_property_set_uint(sdhci, "uhs", UHS_I, &error_abort);
>           if (!sysbus_realize(SYS_BUS_DEVICE(sdhci), errp)) {
>               return;
>           }
> @@ -714,10 +708,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>       for (i = 0; i < XLNX_ZYNQMP_NUM_SPIS; i++) {
>           gchar *bus_name;
>   
> -        if (!object_property_set_bool(OBJECT(&s->spi[i])), "little-endian",
> -                                      true, errp)) {
> -            return;
> -        }
> +        object_property_set_bool(OBJECT(&s->spi[i]), "little-endian",
> +                                 true, &error_abort);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
>               return;
>           }
> @@ -767,14 +759,10 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>       xlnx_zynqmp_create_unimp_mmio(s);
>   
>       for (i = 0; i < XLNX_ZYNQMP_NUM_GDMA_CH; i++) {
> -        if (!object_property_set_uint(OBJECT(&s->gdma[i]), "bus-width", 128,
> -                                      errp)) {
> -            return;
> -        }
> -        if (!object_property_set_link(OBJECT(&s->gdma[i]), "dma",
> -                                      OBJECT(system_memory), errp)) {
> -            return;
> -        }
> +        object_property_set_uint(OBJECT(&s->gdma[i]), "bus-width", 128,
> +                                 &error_abort);
> +        object_property_set_link(OBJECT(&s->gdma[i]), "dma",
> +                                 OBJECT(system_memory), &error_abort);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->gdma[i]), errp)) {
>               return;
>           }
> @@ -815,10 +803,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>       sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi_dma), 0,
>                          qdev_get_gpio_in(DEVICE(&s->qspi_irq_orgate), 0));
>   
> -    if (!object_property_set_link(OBJECT(&s->qspi), "stream-connected-dma",
> -                                  OBJECT(&s->qspi_dma), errp)) {
> -         return;
> -    }
> +    object_property_set_link(OBJECT(&s->qspi), "stream-connected-dma",
> +                             OBJECT(&s->qspi_dma), &error_abort);
>       if (!sysbus_realize(SYS_BUS_DEVICE(&s->qspi), errp)) {
>           return;
>       }
> @@ -837,10 +823,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>       }
>   
>       for (i = 0; i < XLNX_ZYNQMP_NUM_USB; i++) {
> -        if (!object_property_set_link(OBJECT(&s->usb[i].sysbus_xhci), "dma",
> -                                      OBJECT(system_memory), errp)) {
> -            return;
> -        }
> +        object_property_set_link(OBJECT(&s->usb[i].sysbus_xhci), "dma",
> +                                 OBJECT(system_memory), &error_abort);
>   
>           qdev_prop_set_uint32(DEVICE(&s->usb[i].sysbus_xhci), "intrs", 4);
>           qdev_prop_set_uint32(DEVICE(&s->usb[i].sysbus_xhci), "slots", 2);

Re: [PATCH v3 10/17] hw/arm/xlnx-zynqmp: Use &error_abort for programming errors

[Anton Johansson via]

On 04/02/25, Philippe Mathieu-Daudé wrote:
> ping for trivial review?
> 
> On 8/11/24 16:43, Philippe Mathieu-Daudé wrote:
> > When a property value is static (not provided by QMP or CLI),
> > error shouldn't happen, otherwise it is a programming error.
> > Therefore simplify and use &error_abort as this can't fail.
> > 
> > Reported-by: Richard Henderson <richard.henderson@linaro.org>
> > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> > ---
> >   hw/arm/xlnx-zynqmp.c | 44 ++++++++++++++------------------------------
> >   1 file changed, 14 insertions(+), 30 deletions(-)
> > 

Makes sense!:)

Reviewed-by: Anton Johansson <anjo@rev.ng>

[PATCH v3 11/17] target/microblaze: Explode MO_TExx -> MO_TE | MO_xx

[Philippe Mathieu-Daudé]

Extract the implicit MO_TE definition in order to replace
it by runtime variable in the next commit.

Mechanical change using:

  $ for n in UW UL UQ UO SW SL SQ; do \
      sed -i -e "s/MO_TE$n/MO_TE | MO_$n/" \
           $(git grep -l MO_TE$n target/microblaze); \
    done

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/microblaze/translate.c | 36 +++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 4beaf69e76..4c25b1e438 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -779,13 +779,13 @@ static bool trans_lbui(DisasContext *dc, arg_typeb *arg)
 static bool trans_lhu(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
 }
 
 static bool trans_lhur(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, true);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, true);
 }
 
 static bool trans_lhuea(DisasContext *dc, arg_typea *arg)
@@ -797,26 +797,26 @@ static bool trans_lhuea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUW, MMU_NOMMU_IDX, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_lhui(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
 }
 
 static bool trans_lw(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
 }
 
 static bool trans_lwr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, true);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, true);
 }
 
 static bool trans_lwea(DisasContext *dc, arg_typea *arg)
@@ -828,14 +828,14 @@ static bool trans_lwea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TEUL, MMU_NOMMU_IDX, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_lwi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
 }
 
 static bool trans_lwx(DisasContext *dc, arg_typea *arg)
@@ -845,7 +845,7 @@ static bool trans_lwx(DisasContext *dc, arg_typea *arg)
     /* lwx does not throw unaligned access errors, so force alignment */
     tcg_gen_andi_tl(addr, addr, ~3);
 
-    tcg_gen_qemu_ld_i32(cpu_res_val, addr, dc->mem_index, MO_TEUL);
+    tcg_gen_qemu_ld_i32(cpu_res_val, addr, dc->mem_index, MO_TE | MO_UL);
     tcg_gen_mov_tl(cpu_res_addr, addr);
 
     if (arg->rd) {
@@ -929,13 +929,13 @@ static bool trans_sbi(DisasContext *dc, arg_typeb *arg)
 static bool trans_sh(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
 }
 
 static bool trans_shr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, true);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, true);
 }
 
 static bool trans_shea(DisasContext *dc, arg_typea *arg)
@@ -947,26 +947,26 @@ static bool trans_shea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUW, MMU_NOMMU_IDX, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_shi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
 }
 
 static bool trans_sw(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
 }
 
 static bool trans_swr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, true);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, true);
 }
 
 static bool trans_swea(DisasContext *dc, arg_typea *arg)
@@ -978,14 +978,14 @@ static bool trans_swea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TEUL, MMU_NOMMU_IDX, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_swi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
 }
 
 static bool trans_swx(DisasContext *dc, arg_typea *arg)
@@ -1014,7 +1014,7 @@ static bool trans_swx(DisasContext *dc, arg_typea *arg)
 
     tcg_gen_atomic_cmpxchg_i32(tval, cpu_res_addr, cpu_res_val,
                                reg_for_write(dc, arg->rd),
-                               dc->mem_index, MO_TEUL);
+                               dc->mem_index, MO_TE | MO_UL);
 
     tcg_gen_brcond_i32(TCG_COND_NE, cpu_res_val, tval, swx_fail);
 
-- 
2.45.2

[PATCH v3 12/17] target/microblaze: Set MO_TE once in do_load() / do_store()

[Philippe Mathieu-Daudé]

All callers of do_load() / do_store() set MO_TE flag.
Set it once in the callees.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/microblaze/translate.c | 36 +++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 4c25b1e438..86f3c19618 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -712,6 +712,8 @@ static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
 {
     MemOp size = mop & MO_SIZE;
 
+    mop |= MO_TE;
+
     /*
      * When doing reverse accesses we need to do two things.
      *
@@ -779,13 +781,13 @@ static bool trans_lbui(DisasContext *dc, arg_typeb *arg)
 static bool trans_lhu(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_UW, dc->mem_index, false);
 }
 
 static bool trans_lhur(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, true);
+    return do_load(dc, arg->rd, addr, MO_UW, dc->mem_index, true);
 }
 
 static bool trans_lhuea(DisasContext *dc, arg_typea *arg)
@@ -797,26 +799,26 @@ static bool trans_lhuea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, MMU_NOMMU_IDX, false);
+    return do_load(dc, arg->rd, addr, MO_UW, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_lhui(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_UW, dc->mem_index, false);
 }
 
 static bool trans_lw(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_UL, dc->mem_index, false);
 }
 
 static bool trans_lwr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, true);
+    return do_load(dc, arg->rd, addr, MO_UL, dc->mem_index, true);
 }
 
 static bool trans_lwea(DisasContext *dc, arg_typea *arg)
@@ -828,14 +830,14 @@ static bool trans_lwea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, MMU_NOMMU_IDX, false);
+    return do_load(dc, arg->rd, addr, MO_UL, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_lwi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_load(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
+    return do_load(dc, arg->rd, addr, MO_UL, dc->mem_index, false);
 }
 
 static bool trans_lwx(DisasContext *dc, arg_typea *arg)
@@ -862,6 +864,8 @@ static bool do_store(DisasContext *dc, int rd, TCGv addr, MemOp mop,
 {
     MemOp size = mop & MO_SIZE;
 
+    mop |= MO_TE;
+
     /*
      * When doing reverse accesses we need to do two things.
      *
@@ -929,13 +933,13 @@ static bool trans_sbi(DisasContext *dc, arg_typeb *arg)
 static bool trans_sh(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_UW, dc->mem_index, false);
 }
 
 static bool trans_shr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, true);
+    return do_store(dc, arg->rd, addr, MO_UW, dc->mem_index, true);
 }
 
 static bool trans_shea(DisasContext *dc, arg_typea *arg)
@@ -947,26 +951,26 @@ static bool trans_shea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, MMU_NOMMU_IDX, false);
+    return do_store(dc, arg->rd, addr, MO_UW, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_shi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UW, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_UW, dc->mem_index, false);
 }
 
 static bool trans_sw(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_UL, dc->mem_index, false);
 }
 
 static bool trans_swr(DisasContext *dc, arg_typea *arg)
 {
     TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, true);
+    return do_store(dc, arg->rd, addr, MO_UL, dc->mem_index, true);
 }
 
 static bool trans_swea(DisasContext *dc, arg_typea *arg)
@@ -978,14 +982,14 @@ static bool trans_swea(DisasContext *dc, arg_typea *arg)
     return true;
 #else
     TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, MMU_NOMMU_IDX, false);
+    return do_store(dc, arg->rd, addr, MO_UL, MMU_NOMMU_IDX, false);
 #endif
 }
 
 static bool trans_swi(DisasContext *dc, arg_typeb *arg)
 {
     TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
-    return do_store(dc, arg->rd, addr, MO_TE | MO_UL, dc->mem_index, false);
+    return do_store(dc, arg->rd, addr, MO_UL, dc->mem_index, false);
 }
 
 static bool trans_swx(DisasContext *dc, arg_typea *arg)
-- 
2.45.2

[PATCH v3 13/17] target/microblaze: Introduce mo_endian() helper

[Philippe Mathieu-Daudé]

mo_endian() returns the target endianness, currently static.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/microblaze/translate.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 86f3c19618..0b466db694 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -707,12 +707,17 @@ static void record_unaligned_ess(DisasContext *dc, int rd,
 }
 #endif
 
+static inline MemOp mo_endian(DisasContext *dc)
+{
+    return MO_TE;
+}
+
 static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
                     int mem_index, bool rev)
 {
     MemOp size = mop & MO_SIZE;
 
-    mop |= MO_TE;
+    mop |= mo_endian(dc);
 
     /*
      * When doing reverse accesses we need to do two things.
@@ -847,7 +852,8 @@ static bool trans_lwx(DisasContext *dc, arg_typea *arg)
     /* lwx does not throw unaligned access errors, so force alignment */
     tcg_gen_andi_tl(addr, addr, ~3);
 
-    tcg_gen_qemu_ld_i32(cpu_res_val, addr, dc->mem_index, MO_TE | MO_UL);
+    tcg_gen_qemu_ld_i32(cpu_res_val, addr, dc->mem_index,
+                        mo_endian(dc) | MO_UL);
     tcg_gen_mov_tl(cpu_res_addr, addr);
 
     if (arg->rd) {
@@ -864,7 +870,7 @@ static bool do_store(DisasContext *dc, int rd, TCGv addr, MemOp mop,
 {
     MemOp size = mop & MO_SIZE;
 
-    mop |= MO_TE;
+    mop |= mo_endian(dc);
 
     /*
      * When doing reverse accesses we need to do two things.
@@ -1018,7 +1024,7 @@ static bool trans_swx(DisasContext *dc, arg_typea *arg)
 
     tcg_gen_atomic_cmpxchg_i32(tval, cpu_res_addr, cpu_res_val,
                                reg_for_write(dc, arg->rd),
-                               dc->mem_index, MO_TE | MO_UL);
+                               dc->mem_index, mo_endian(dc) | MO_UL);
 
     tcg_gen_brcond_i32(TCG_COND_NE, cpu_res_val, tval, swx_fail);
 
-- 
2.45.2

[PATCH v3 14/17] target/microblaze: Consider endianness while translating code

[Philippe Mathieu-Daudé]

Consider the CPU ENDI bit, swap instructions when the CPU
endianness doesn't match the binary one.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/microblaze/cpu.h       | 7 +++++++
 target/microblaze/translate.c | 5 +++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/target/microblaze/cpu.h b/target/microblaze/cpu.h
index 3e5a3e5c60..6d540713eb 100644
--- a/target/microblaze/cpu.h
+++ b/target/microblaze/cpu.h
@@ -412,6 +412,13 @@ void mb_tcg_init(void);
 /* Ensure there is no overlap between the two masks. */
 QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK);
 
+static inline bool mb_cpu_is_big_endian(CPUState *cs)
+{
+    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
+
+    return !cpu->cfg.endi;
+}
+
 static inline void cpu_get_tb_cpu_state(CPUMBState *env, vaddr *pc,
                                         uint64_t *cs_base, uint32_t *flags)
 {
diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 0b466db694..5595ae4fad 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -709,7 +709,7 @@ static void record_unaligned_ess(DisasContext *dc, int rd,
 
 static inline MemOp mo_endian(DisasContext *dc)
 {
-    return MO_TE;
+    return dc->cfg->endi ? MO_LE : MO_BE;
 }
 
 static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
@@ -1646,7 +1646,8 @@ static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
 
     dc->tb_flags_to_set = 0;
 
-    ir = translator_ldl(cpu_env(cs), &dc->base, dc->base.pc_next);
+    ir = translator_ldl_swap(cpu_env(cs), &dc->base, dc->base.pc_next,
+                             mb_cpu_is_big_endian(cs) != TARGET_BIG_ENDIAN);
     if (!decode(dc, ir)) {
         trap_illegal(dc, true);
     }
-- 
2.45.2

[PATCH v3 15/17] hw/microblaze: Support various endianness for s3adsp1800 machines

[Philippe Mathieu-Daudé]

Introduce an abstract machine parent class which defines
the 'little_endian' property. Duplicate the current machine,
which endian is tied to the binary endianness, to one big
endian and a little endian machine; updating the machine
description. Keep the current default machine for each binary.

'petalogix-s3adsp1800' machine is aliased as:
- 'petalogix-s3adsp1800-be' on big-endian binary,
- 'petalogix-s3adsp1800-le' on little-endian one.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/microblaze/petalogix_s3adsp1800_mmu.c | 62 +++++++++++++++++++-----
 1 file changed, 51 insertions(+), 11 deletions(-)

diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index 2d2b3c9bca..df123ad4cc 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -55,8 +55,17 @@
 #define ETHLITE_IRQ         1
 #define UARTLITE_IRQ        3
 
+typedef struct PetalogixS3adsp1800MachineClass {
+    MachineClass parent_obj;
+
+    bool little_endian;
+} PetalogixS3adsp1800MachineClass;
+
 #define TYPE_PETALOGIX_S3ADSP1800_MACHINE \
-            MACHINE_TYPE_NAME("petalogix-s3adsp1800")
+            MACHINE_TYPE_NAME("petalogix-s3adsp1800-common")
+DECLARE_CLASS_CHECKERS(PetalogixS3adsp1800MachineClass,
+                       PETALOGIX_S3ADSP1800_MACHINE,
+                       TYPE_PETALOGIX_S3ADSP1800_MACHINE)
 
 static void
 petalogix_s3adsp1800_init(MachineState *machine)
@@ -71,11 +80,13 @@ petalogix_s3adsp1800_init(MachineState *machine)
     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
     qemu_irq irq[32];
     MemoryRegion *sysmem = get_system_memory();
+    PetalogixS3adsp1800MachineClass *pmc;
 
+    pmc = PETALOGIX_S3ADSP1800_MACHINE_GET_CLASS(machine);
     cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
     object_property_set_str(OBJECT(cpu), "version", "7.10.d", &error_abort);
     object_property_set_bool(OBJECT(cpu), "little-endian",
-                             !TARGET_BIG_ENDIAN, &error_abort);
+                             pmc->little_endian, &error_abort);
     qdev_realize(DEVICE(cpu), NULL, &error_abort);
 
     /* Attach emulated BRAM through the LMB.  */
@@ -95,7 +106,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
                           64 * KiB, 1, 0x89, 0x18, 0x0000, 0x0, 1);
 
     dev = qdev_new("xlnx.xps-intc");
-    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
+    qdev_prop_set_bit(dev, "little-endian", pmc->little_endian);
     qdev_prop_set_uint32(dev, "kind-of-intr",
                          1 << ETHLITE_IRQ | 1 << UARTLITE_IRQ);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
@@ -107,7 +118,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
     }
 
     dev = qdev_new(TYPE_XILINX_UARTLITE);
-    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
+    qdev_prop_set_bit(dev, "little-endian", pmc->little_endian);
     qdev_prop_set_chr(dev, "chardev", serial_hd(0));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, UARTLITE_BASEADDR);
@@ -115,7 +126,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
 
     /* 2 timers at irq 2 @ 62 Mhz.  */
     dev = qdev_new("xlnx.xps-timer");
-    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
+    qdev_prop_set_bit(dev, "little-endian", pmc->little_endian);
     qdev_prop_set_uint32(dev, "one-timer-only", 0);
     qdev_prop_set_uint32(dev, "clock-frequency", 62 * 1000000);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
@@ -123,7 +134,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[TIMER_IRQ]);
 
     dev = qdev_new("xlnx.xps-ethernetlite");
-    qdev_prop_set_bit(dev, "little-endian", !TARGET_BIG_ENDIAN);
+    qdev_prop_set_bit(dev, "little-endian", pmc->little_endian);
     qemu_configure_nic_device(dev, true, NULL);
     qdev_prop_set_uint32(dev, "tx-ping-pong", 0);
     qdev_prop_set_uint32(dev, "rx-ping-pong", 0);
@@ -133,26 +144,55 @@ petalogix_s3adsp1800_init(MachineState *machine)
 
     create_unimplemented_device("xps_gpio", GPIO_BASEADDR, 0x10000);
 
-    microblaze_load_kernel(cpu, !TARGET_BIG_ENDIAN, ddr_base, ram_size,
+    microblaze_load_kernel(cpu, pmc->little_endian, ddr_base, ram_size,
                            machine->initrd_filename,
                            BINARY_DEVICE_TREE_FILE,
                            NULL);
 }
 
-static void petalogix_s3adsp1800_machine_class_init(ObjectClass *oc, void *data)
+static void petalogix_s3adsp1800_machine_class_init(ObjectClass *oc,
+                                                    bool little_endian)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
+    PetalogixS3adsp1800MachineClass *pmc = PETALOGIX_S3ADSP1800_MACHINE_CLASS(oc);
 
-    mc->desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800";
     mc->init = petalogix_s3adsp1800_init;
-    mc->is_default = true;
+    pmc->little_endian = little_endian;
+    mc->desc = little_endian
+        ? "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800 (little endian)"
+        : "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800 (big endian)";
+    if (little_endian == !TARGET_BIG_ENDIAN) {
+        mc->is_default = true;
+        mc->alias = "petalogix-s3adsp1800";
+    }
+}
+
+static void petalogix_s3adsp1800_machine_class_init_be(ObjectClass *oc, void *data)
+{
+    petalogix_s3adsp1800_machine_class_init(oc, false);
+}
+
+static void petalogix_s3adsp1800_machine_class_init_le(ObjectClass *oc, void *data)
+{
+    petalogix_s3adsp1800_machine_class_init(oc, true);
 }
 
 static const TypeInfo petalogix_s3adsp1800_machine_types[] = {
     {
         .name           = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
         .parent         = TYPE_MACHINE,
-        .class_init     = petalogix_s3adsp1800_machine_class_init,
+        .abstract       = true,
+        .class_size     = sizeof(PetalogixS3adsp1800MachineClass),
+    },
+    {
+        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-be"),
+        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
+        .class_init     = petalogix_s3adsp1800_machine_class_init_be,
+    },
+    {
+        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-le"),
+        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
+        .class_init     = petalogix_s3adsp1800_machine_class_init_le,
     },
 };
 
-- 
2.45.2

Re: [PATCH v3 15/17] hw/microblaze: Support various endianness for s3adsp1800 machines

[Thomas Huth]

On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
> Introduce an abstract machine parent class which defines
> the 'little_endian' property. Duplicate the current machine,
> which endian is tied to the binary endianness, to one big
> endian and a little endian machine; updating the machine
> description. Keep the current default machine for each binary.
> 
> 'petalogix-s3adsp1800' machine is aliased as:
> - 'petalogix-s3adsp1800-be' on big-endian binary,
> - 'petalogix-s3adsp1800-le' on little-endian one.
> 
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/microblaze/petalogix_s3adsp1800_mmu.c | 62 +++++++++++++++++++-----
>   1 file changed, 51 insertions(+), 11 deletions(-)
...
>   static const TypeInfo petalogix_s3adsp1800_machine_types[] = {
>       {
>           .name           = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>           .parent         = TYPE_MACHINE,
> -        .class_init     = petalogix_s3adsp1800_machine_class_init,
> +        .abstract       = true,
> +        .class_size     = sizeof(PetalogixS3adsp1800MachineClass),
> +    },
> +    {
> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-be"),
> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
> +        .class_init     = petalogix_s3adsp1800_machine_class_init_be,
> +    },
> +    {
> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-le"),
> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
> +        .class_init     = petalogix_s3adsp1800_machine_class_init_le,
>       },
>   };
>   

Do we really want additional machine types for this? Can't we simply let the 
user set the machine property instead? (otherwise, all tests that run for 
each machine types (see qtest_cb_for_every_machine) will now be executed 
three times instead of only once). IMHO it should be sufficient to have a 
machine property for this and add proper documentation for the machine.

  Thomas

Re: [PATCH v3 15/17] hw/microblaze: Support various endianness for s3adsp1800 machines

[Philippe Mathieu-Daudé]

On 11/11/24 07:56, Thomas Huth wrote:
> On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
>> Introduce an abstract machine parent class which defines
>> the 'little_endian' property. Duplicate the current machine,
>> which endian is tied to the binary endianness, to one big
>> endian and a little endian machine; updating the machine
>> description. Keep the current default machine for each binary.
>>
>> 'petalogix-s3adsp1800' machine is aliased as:
>> - 'petalogix-s3adsp1800-be' on big-endian binary,
>> - 'petalogix-s3adsp1800-le' on little-endian one.
>>
>> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   hw/microblaze/petalogix_s3adsp1800_mmu.c | 62 +++++++++++++++++++-----
>>   1 file changed, 51 insertions(+), 11 deletions(-)
> ...
>>   static const TypeInfo petalogix_s3adsp1800_machine_types[] = {
>>       {
>>           .name           = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>>           .parent         = TYPE_MACHINE,
>> -        .class_init     = petalogix_s3adsp1800_machine_class_init,
>> +        .abstract       = true,
>> +        .class_size     = sizeof(PetalogixS3adsp1800MachineClass),
>> +    },
>> +    {
>> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-be"),
>> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>> +        .class_init     = petalogix_s3adsp1800_machine_class_init_be,
>> +    },
>> +    {
>> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-le"),
>> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>> +        .class_init     = petalogix_s3adsp1800_machine_class_init_le,
>>       },
>>   };
> 
> Do we really want additional machine types for this? Can't we simply let 
> the user set the machine property instead? (otherwise, all tests that 
> run for each machine types (see qtest_cb_for_every_machine) will now be 
> executed three times instead of only once). IMHO it should be sufficient 
> to have a machine property for this and add proper documentation for the 
> machine.

Machine property was my first approach but then I figured when merging
the 2 binaries in one, it is confusing for the CLI users.

Having 3 more tests until we unify the endianness binary doesn't seem
a high price to pay to me. Besides, not we are not exercising the same
code path. We need to prove the tests are really duplicated so we can
merge the binaries. If you really insist I can modify qtests to skip
these machines meanwhile.

> 
>   Thomas
> 

Re: [PATCH v3 15/17] hw/microblaze: Support various endianness for s3adsp1800 machines

[Thomas Huth]

On 11/11/2024 12.59, Philippe Mathieu-Daudé wrote:
> On 11/11/24 07:56, Thomas Huth wrote:
>> On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
>>> Introduce an abstract machine parent class which defines
>>> the 'little_endian' property. Duplicate the current machine,
>>> which endian is tied to the binary endianness, to one big
>>> endian and a little endian machine; updating the machine
>>> description. Keep the current default machine for each binary.
>>>
>>> 'petalogix-s3adsp1800' machine is aliased as:
>>> - 'petalogix-s3adsp1800-be' on big-endian binary,
>>> - 'petalogix-s3adsp1800-le' on little-endian one.
>>>
>>> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>>> ---
>>>   hw/microblaze/petalogix_s3adsp1800_mmu.c | 62 +++++++++++++++++++-----
>>>   1 file changed, 51 insertions(+), 11 deletions(-)
>> ...
>>>   static const TypeInfo petalogix_s3adsp1800_machine_types[] = {
>>>       {
>>>           .name           = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>>>           .parent         = TYPE_MACHINE,
>>> -        .class_init     = petalogix_s3adsp1800_machine_class_init,
>>> +        .abstract       = true,
>>> +        .class_size     = sizeof(PetalogixS3adsp1800MachineClass),
>>> +    },
>>> +    {
>>> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-be"),
>>> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>>> +        .class_init     = petalogix_s3adsp1800_machine_class_init_be,
>>> +    },
>>> +    {
>>> +        .name           = MACHINE_TYPE_NAME("petalogix-s3adsp1800-le"),
>>> +        .parent         = TYPE_PETALOGIX_S3ADSP1800_MACHINE,
>>> +        .class_init     = petalogix_s3adsp1800_machine_class_init_le,
>>>       },
>>>   };
>>
>> Do we really want additional machine types for this? Can't we simply let 
>> the user set the machine property instead? (otherwise, all tests that run 
>> for each machine types (see qtest_cb_for_every_machine) will now be 
>> executed three times instead of only once). IMHO it should be sufficient 
>> to have a machine property for this and add proper documentation for the 
>> machine.
> 
> Machine property was my first approach but then I figured when merging
> the 2 binaries in one, it is confusing for the CLI users.
> 
> Having 3 more tests until we unify the endianness binary doesn't seem
> a high price to pay to me. Besides, not we are not exercising the same
> code path. We need to prove the tests are really duplicated so we can
> merge the binaries. If you really insist I can modify qtests to skip
> these machines meanwhile.

Ok, I don't insist, if unify the two endianness binaries into one in the 
end, that's a much bigger win, I think, so let's keep this patch as it is.

  Thomas

[PATCH v3 16/17] tests/functional: Explicit endianness of microblaze assets

[Philippe Mathieu-Daudé]

The archive used in test_microblaze_s3adsp1800.py (testing a
big-endian target) contains a big-endian kernel. Rename using
the _BE suffix.

Similarly, the archive in test_microblazeel_s3adsp1800 (testing
a little-endian target) contains a little-endian kernel. Rename
using _LE suffix.

These changes will help when adding cross-endian kernel tests.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 tests/functional/test_microblaze_s3adsp1800.py   | 6 +++---
 tests/functional/test_microblazeel_s3adsp1800.py | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/tests/functional/test_microblaze_s3adsp1800.py b/tests/functional/test_microblaze_s3adsp1800.py
index 4f692ffdb1..2b2f782270 100755
--- a/tests/functional/test_microblaze_s3adsp1800.py
+++ b/tests/functional/test_microblaze_s3adsp1800.py
@@ -17,14 +17,14 @@ class MicroblazeMachine(QemuSystemTest):
 
     timeout = 90
 
-    ASSET_IMAGE = Asset(
+    ASSET_IMAGE_BE = Asset(
         ('https://qemu-advcal.gitlab.io/qac-best-of-multiarch/download/'
          'day17.tar.xz'),
         '3ba7439dfbea7af4876662c97f8e1f0cdad9231fc166e4861d17042489270057')
 
-    def test_microblaze_s3adsp1800(self):
+    def test_microblaze_s3adsp1800_be(self):
         self.set_machine('petalogix-s3adsp1800')
-        file_path = self.ASSET_IMAGE.fetch()
+        file_path = self.ASSET_IMAGE_BE.fetch()
         archive_extract(file_path, self.workdir)
         self.vm.set_console()
         self.vm.add_args('-kernel', self.workdir + '/day17/ballerina.bin')
diff --git a/tests/functional/test_microblazeel_s3adsp1800.py b/tests/functional/test_microblazeel_s3adsp1800.py
index faa3927f2e..1aee5149fb 100755
--- a/tests/functional/test_microblazeel_s3adsp1800.py
+++ b/tests/functional/test_microblazeel_s3adsp1800.py
@@ -17,14 +17,14 @@ class MicroblazeelMachine(QemuSystemTest):
 
     timeout = 90
 
-    ASSET_IMAGE = Asset(
+    ASSET_IMAGE_LE = Asset(
         ('http://www.qemu-advent-calendar.org/2023/download/day13.tar.gz'),
         'b9b3d43c5dd79db88ada495cc6e0d1f591153fe41355e925d791fbf44de50c22')
 
-    def test_microblazeel_s3adsp1800(self):
+    def test_microblazeel_s3adsp1800_le(self):
         self.require_netdev('user')
         self.set_machine('petalogix-s3adsp1800')
-        file_path = self.ASSET_IMAGE.fetch()
+        file_path = self.ASSET_IMAGE_LE.fetch()
         archive_extract(file_path, self.workdir)
         self.vm.set_console()
         self.vm.add_args('-kernel', self.workdir + '/day13/xmaton.bin')
-- 
2.45.2

Re: [PATCH v3 16/17] tests/functional: Explicit endianness of microblaze assets

[Thomas Huth]

On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
> The archive used in test_microblaze_s3adsp1800.py (testing a
> big-endian target) contains a big-endian kernel. Rename using
> the _BE suffix.
> 
> Similarly, the archive in test_microblazeel_s3adsp1800 (testing
> a little-endian target) contains a little-endian kernel. Rename
> using _LE suffix.
> 
> These changes will help when adding cross-endian kernel tests.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   tests/functional/test_microblaze_s3adsp1800.py   | 6 +++---
>   tests/functional/test_microblazeel_s3adsp1800.py | 6 +++---
>   2 files changed, 6 insertions(+), 6 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>

[PATCH v3 17/17] tests/functional: Add microblaze cross-endianness tests

[Philippe Mathieu-Daudé]

Copy/paste the current tests, but call the opposite endianness
machines, testing:
- petalogix-s3adsp1800-le machine (little-endian CPU) on the
  qemu-system-microblaze binary (big-endian)
- petalogix-s3adsp1800-be machine (big-endian CPU) on the
  qemu-system-microblazeel binary (little-endian).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 .../functional/test_microblaze_s3adsp1800.py  | 21 +++++++++++++++++++
 .../test_microblazeel_s3adsp1800.py           | 19 +++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/tests/functional/test_microblaze_s3adsp1800.py b/tests/functional/test_microblaze_s3adsp1800.py
index 2b2f782270..7f5e8b6024 100755
--- a/tests/functional/test_microblaze_s3adsp1800.py
+++ b/tests/functional/test_microblaze_s3adsp1800.py
@@ -36,5 +36,26 @@ def test_microblaze_s3adsp1800_be(self):
         # message, that's why we don't test for a later string here. This
         # needs some investigation by a microblaze wizard one day...
 
+    ASSET_IMAGE_LE = Asset(
+        ('http://www.qemu-advent-calendar.org/2023/download/day13.tar.gz'),
+        'b9b3d43c5dd79db88ada495cc6e0d1f591153fe41355e925d791fbf44de50c22')
+
+    def test_microblaze_s3adsp1800_le(self):
+        self.require_netdev('user')
+        self.set_machine('petalogix-s3adsp1800-le')
+        file_path = self.ASSET_IMAGE_LE.fetch()
+        archive_extract(file_path, self.workdir)
+        self.vm.set_console()
+        self.vm.add_args('-kernel', self.workdir + '/day13/xmaton.bin')
+        self.vm.add_args('-nic', 'user,tftp=' + self.workdir + '/day13/')
+        self.vm.launch()
+        wait_for_console_pattern(self, 'QEMU Advent Calendar 2023')
+        time.sleep(0.1)
+        exec_command(self, 'root')
+        time.sleep(0.1)
+        exec_command_and_wait_for_pattern(self,
+                'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
+                '821cd3cab8efd16ad6ee5acc3642a8ea')
+
 if __name__ == '__main__':
     QemuSystemTest.main()
diff --git a/tests/functional/test_microblazeel_s3adsp1800.py b/tests/functional/test_microblazeel_s3adsp1800.py
index 1aee5149fb..60543009ba 100755
--- a/tests/functional/test_microblazeel_s3adsp1800.py
+++ b/tests/functional/test_microblazeel_s3adsp1800.py
@@ -38,5 +38,24 @@ def test_microblazeel_s3adsp1800_le(self):
                 'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
                 '821cd3cab8efd16ad6ee5acc3642a8ea')
 
+    ASSET_IMAGE_BE = Asset(
+        ('https://qemu-advcal.gitlab.io/qac-best-of-multiarch/download/'
+         'day17.tar.xz'),
+        '3ba7439dfbea7af4876662c97f8e1f0cdad9231fc166e4861d17042489270057')
+
+    def test_microblazeel_s3adsp1800_be(self):
+        self.set_machine('petalogix-s3adsp1800-be')
+        file_path = self.ASSET_IMAGE_BE.fetch()
+        archive_extract(file_path, self.workdir)
+        self.vm.set_console()
+        self.vm.add_args('-kernel', self.workdir + '/day17/ballerina.bin')
+        self.vm.launch()
+        wait_for_console_pattern(self, 'This architecture does not have '
+                                       'kernel memory protection')
+        # Note:
+        # The kernel sometimes gets stuck after the "This architecture ..."
+        # message, that's why we don't test for a later string here. This
+        # needs some investigation by a microblaze wizard one day...
+
 if __name__ == '__main__':
     QemuSystemTest.main()
-- 
2.45.2

Re: [PATCH v3 17/17] tests/functional: Add microblaze cross-endianness tests

[Thomas Huth]

On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
> Copy/paste the current tests, but call the opposite endianness
> machines, testing:
> - petalogix-s3adsp1800-le machine (little-endian CPU) on the
>    qemu-system-microblaze binary (big-endian)
> - petalogix-s3adsp1800-be machine (big-endian CPU) on the
>    qemu-system-microblazeel binary (little-endian).
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   .../functional/test_microblaze_s3adsp1800.py  | 21 +++++++++++++++++++
>   .../test_microblazeel_s3adsp1800.py           | 19 +++++++++++++++++
>   2 files changed, 40 insertions(+)
> 
> diff --git a/tests/functional/test_microblaze_s3adsp1800.py b/tests/functional/test_microblaze_s3adsp1800.py
> index 2b2f782270..7f5e8b6024 100755
> --- a/tests/functional/test_microblaze_s3adsp1800.py
> +++ b/tests/functional/test_microblaze_s3adsp1800.py
> @@ -36,5 +36,26 @@ def test_microblaze_s3adsp1800_be(self):
>           # message, that's why we don't test for a later string here. This
>           # needs some investigation by a microblaze wizard one day...
>   
> +    ASSET_IMAGE_LE = Asset(
> +        ('http://www.qemu-advent-calendar.org/2023/download/day13.tar.gz'),
> +        'b9b3d43c5dd79db88ada495cc6e0d1f591153fe41355e925d791fbf44de50c22')
> +
> +    def test_microblaze_s3adsp1800_le(self):
> +        self.require_netdev('user')
> +        self.set_machine('petalogix-s3adsp1800-le')
> +        file_path = self.ASSET_IMAGE_LE.fetch()
> +        archive_extract(file_path, self.workdir)
> +        self.vm.set_console()
> +        self.vm.add_args('-kernel', self.workdir + '/day13/xmaton.bin')
> +        self.vm.add_args('-nic', 'user,tftp=' + self.workdir + '/day13/')
> +        self.vm.launch()
> +        wait_for_console_pattern(self, 'QEMU Advent Calendar 2023')
> +        time.sleep(0.1)
> +        exec_command(self, 'root')
> +        time.sleep(0.1)
> +        exec_command_and_wait_for_pattern(self,
> +                'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
> +                '821cd3cab8efd16ad6ee5acc3642a8ea')
> +
>   if __name__ == '__main__':
>       QemuSystemTest.main()
> diff --git a/tests/functional/test_microblazeel_s3adsp1800.py b/tests/functional/test_microblazeel_s3adsp1800.py
> index 1aee5149fb..60543009ba 100755
> --- a/tests/functional/test_microblazeel_s3adsp1800.py
> +++ b/tests/functional/test_microblazeel_s3adsp1800.py
> @@ -38,5 +38,24 @@ def test_microblazeel_s3adsp1800_le(self):
>                   'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
>                   '821cd3cab8efd16ad6ee5acc3642a8ea')
>   
> +    ASSET_IMAGE_BE = Asset(
> +        ('https://qemu-advcal.gitlab.io/qac-best-of-multiarch/download/'
> +         'day17.tar.xz'),
> +        '3ba7439dfbea7af4876662c97f8e1f0cdad9231fc166e4861d17042489270057')
> +
> +    def test_microblazeel_s3adsp1800_be(self):
> +        self.set_machine('petalogix-s3adsp1800-be')
> +        file_path = self.ASSET_IMAGE_BE.fetch()
> +        archive_extract(file_path, self.workdir)
> +        self.vm.set_console()
> +        self.vm.add_args('-kernel', self.workdir + '/day17/ballerina.bin')
> +        self.vm.launch()
> +        wait_for_console_pattern(self, 'This architecture does not have '
> +                                       'kernel memory protection')
> +        # Note:
> +        # The kernel sometimes gets stuck after the "This architecture ..."
> +        # message, that's why we don't test for a later string here. This
> +        # needs some investigation by a microblaze wizard one day...
> +
>   if __name__ == '__main__':
>       QemuSystemTest.main()

Duplicating code is ugly. I think I'd rather prefer to merge the two files 
into one and then add that test to both targets in meson.build.

  Thomas

Re: [PATCH v3 17/17] tests/functional: Add microblaze cross-endianness tests

[Philippe Mathieu-Daudé]

On 11/11/24 07:57, Thomas Huth wrote:
> On 08/11/2024 16.43, Philippe Mathieu-Daudé wrote:
>> Copy/paste the current tests, but call the opposite endianness
>> machines, testing:
>> - petalogix-s3adsp1800-le machine (little-endian CPU) on the
>>    qemu-system-microblaze binary (big-endian)
>> - petalogix-s3adsp1800-be machine (big-endian CPU) on the
>>    qemu-system-microblazeel binary (little-endian).
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>> ---
>>   .../functional/test_microblaze_s3adsp1800.py  | 21 +++++++++++++++++++
>>   .../test_microblazeel_s3adsp1800.py           | 19 +++++++++++++++++
>>   2 files changed, 40 insertions(+)
>>
>> diff --git a/tests/functional/test_microblaze_s3adsp1800.py 
>> b/tests/functional/test_microblaze_s3adsp1800.py
>> index 2b2f782270..7f5e8b6024 100755
>> --- a/tests/functional/test_microblaze_s3adsp1800.py
>> +++ b/tests/functional/test_microblaze_s3adsp1800.py
>> @@ -36,5 +36,26 @@ def test_microblaze_s3adsp1800_be(self):
>>           # message, that's why we don't test for a later string here. 
>> This
>>           # needs some investigation by a microblaze wizard one day...
>> +    ASSET_IMAGE_LE = Asset(
>> +        
>> ('http://www.qemu-advent-calendar.org/2023/download/day13.tar.gz'),
>> +        
>> 'b9b3d43c5dd79db88ada495cc6e0d1f591153fe41355e925d791fbf44de50c22')
>> +
>> +    def test_microblaze_s3adsp1800_le(self):
>> +        self.require_netdev('user')
>> +        self.set_machine('petalogix-s3adsp1800-le')
>> +        file_path = self.ASSET_IMAGE_LE.fetch()
>> +        archive_extract(file_path, self.workdir)
>> +        self.vm.set_console()
>> +        self.vm.add_args('-kernel', self.workdir + '/day13/xmaton.bin')
>> +        self.vm.add_args('-nic', 'user,tftp=' + self.workdir + 
>> '/day13/')
>> +        self.vm.launch()
>> +        wait_for_console_pattern(self, 'QEMU Advent Calendar 2023')
>> +        time.sleep(0.1)
>> +        exec_command(self, 'root')
>> +        time.sleep(0.1)
>> +        exec_command_and_wait_for_pattern(self,
>> +                'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
>> +                '821cd3cab8efd16ad6ee5acc3642a8ea')
>> +
>>   if __name__ == '__main__':
>>       QemuSystemTest.main()
>> diff --git a/tests/functional/test_microblazeel_s3adsp1800.py 
>> b/tests/functional/test_microblazeel_s3adsp1800.py
>> index 1aee5149fb..60543009ba 100755
>> --- a/tests/functional/test_microblazeel_s3adsp1800.py
>> +++ b/tests/functional/test_microblazeel_s3adsp1800.py
>> @@ -38,5 +38,24 @@ def test_microblazeel_s3adsp1800_le(self):
>>                   'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
>>                   '821cd3cab8efd16ad6ee5acc3642a8ea')
>> +    ASSET_IMAGE_BE = Asset(
>> +        ('https://qemu-advcal.gitlab.io/qac-best-of-multiarch/download/'
>> +         'day17.tar.xz'),
>> +        
>> '3ba7439dfbea7af4876662c97f8e1f0cdad9231fc166e4861d17042489270057')
>> +
>> +    def test_microblazeel_s3adsp1800_be(self):
>> +        self.set_machine('petalogix-s3adsp1800-be')
>> +        file_path = self.ASSET_IMAGE_BE.fetch()
>> +        archive_extract(file_path, self.workdir)
>> +        self.vm.set_console()
>> +        self.vm.add_args('-kernel', self.workdir + 
>> '/day17/ballerina.bin')
>> +        self.vm.launch()
>> +        wait_for_console_pattern(self, 'This architecture does not 
>> have '
>> +                                       'kernel memory protection')
>> +        # Note:
>> +        # The kernel sometimes gets stuck after the "This 
>> architecture ..."
>> +        # message, that's why we don't test for a later string here. 
>> This
>> +        # needs some investigation by a microblaze wizard one day...
>> +
>>   if __name__ == '__main__':
>>       QemuSystemTest.main()
> 
> Duplicating code is ugly. I think I'd rather prefer to merge the two 
> files into one and then add that test to both targets in meson.build.

In v2 I mentioned I'll merge them in a following up patch. I'll try
to do that for v4.