[PATCH 0/6] hw/mips/gt64120: Minor fixes

[PATCH 0/6] hw/mips/gt64120: Minor fixes

[Philippe Mathieu-Daudé]

Trivial fixes extracted from another series which became too big,
so I prefer to send them in a previous step.

Philippe Mathieu-Daudé (6):
  hw/mips/gt64xxx: Initialize ISD I/O memory region in DeviceRealize()
  hw/mips/gt64xxx: Simplify ISD MemoryRegion read/write handlers
  hw/mips/gt64xxx: Fix typos in qemu_log_mask() formats
  hw/mips/gt64xxx: Rename trace events related to interrupt registers
  hw/mips/gt64xxx: Trace accesses to ISD registers
  hw/mips/gt64xxx: Let the GT64120 manage the lower 512MiB hole

 hw/mips/gt64xxx_pci.c | 67 +++++++++++++++++++++++++++----------------
 hw/mips/malta.c       |  7 -----
 hw/mips/trace-events  |  6 ++--
 3 files changed, 47 insertions(+), 33 deletions(-)

-- 
2.26.2

[PATCH 1/6] hw/mips/gt64xxx: Initialize ISD I/O memory region in DeviceRealize()

[Philippe Mathieu-Daudé]

The ISD I/O region belongs to the TYPE_GT64120_PCI_HOST_BRIDGE,
so initialize it before it is realized, not after.
Rename the region as 'gt64120-isd' so it is clearer to realize
it belongs to the GT64120 in the memory tree view.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 588e6f99301..6eb73e77057 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -1196,6 +1196,14 @@ static void gt64120_reset(DeviceState *dev)
     gt64120_pci_mapping(s);
 }
 
+static void gt64120_realize(DeviceState *dev, Error **errp)
+{
+    GT64120State *s = GT64120_PCI_HOST_BRIDGE(dev);
+
+    memory_region_init_io(&s->ISD_mem, OBJECT(dev), &isd_mem_ops, s,
+                          "gt64120-isd", 0x1000);
+}
+
 PCIBus *gt64120_register(qemu_irq *pic)
 {
     GT64120State *d;
@@ -1214,8 +1222,6 @@ PCIBus *gt64120_register(qemu_irq *pic)
                                      get_system_io(),
                                      PCI_DEVFN(18, 0), 4, TYPE_PCI_BUS);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
-    memory_region_init_io(&d->ISD_mem, OBJECT(dev), &isd_mem_ops, d,
-                          "isd-mem", 0x1000);
 
     pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "gt64120_pci");
     return phb->bus;
@@ -1270,6 +1276,7 @@ static void gt64120_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+    dc->realize = gt64120_realize;
     dc->reset = gt64120_reset;
     dc->vmsd = &vmstate_gt64120;
 }
-- 
2.26.2

[PATCH 2/6] hw/mips/gt64xxx: Simplify ISD MemoryRegion read/write handlers

[Philippe Mathieu-Daudé]

The ISD MemoryRegion is implemented for 32-bit accesses.
Simplify it by setting the MemoryRegionOps::impl min/max
access size fields.

Since the region is registered with a size of 0x1000 bytes,
we can remove the hwaddr mask.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 6eb73e77057..99b1690af19 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -385,13 +385,12 @@ static void gt64120_writel(void *opaque, hwaddr addr,
 {
     GT64120State *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
-    uint32_t saddr;
+    uint32_t saddr = addr >> 2;
 
     if (!(s->regs[GT_CPU] & 0x00001000)) {
         val = bswap32(val);
     }
 
-    saddr = (addr & 0xfff) >> 2;
     switch (saddr) {
 
     /* CPU Configuration */
@@ -695,9 +694,8 @@ static uint64_t gt64120_readl(void *opaque,
     GT64120State *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     uint32_t val;
-    uint32_t saddr;
+    uint32_t saddr = addr >> 2;
 
-    saddr = (addr & 0xfff) >> 2;
     switch (saddr) {
 
     /* CPU Configuration */
@@ -976,6 +974,10 @@ static const MemoryRegionOps isd_mem_ops = {
     .read = gt64120_readl,
     .write = gt64120_writel,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
 };
 
 static int gt64120_pci_map_irq(PCIDevice *pci_dev, int irq_num)
-- 
2.26.2

[PATCH 3/6] hw/mips/gt64xxx: Fix typos in qemu_log_mask() formats

[Philippe Mathieu-Daudé]

Fix the following typos:
- GT_PCI1_CFGDATA is not a timer register but a PCI one,
- zero-padding flag is out of the format

Fixes: 641ca2bfcd5 ("hw/mips/gt64xxx_pci: Use qemu_log_mask() instead of debug printf()")
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 99b1690af19..8ff31380d74 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -463,7 +463,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Read-only registers, do nothing */
         qemu_log_mask(LOG_GUEST_ERROR,
                       "gt64120: Read-only register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -473,7 +473,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Read-only registers, do nothing */
         qemu_log_mask(LOG_GUEST_ERROR,
                       "gt64120: Read-only register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -515,7 +515,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Not implemented */
         qemu_log_mask(LOG_UNIMP,
                       "gt64120: Unimplemented device register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -528,7 +528,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Read-only registers, do nothing */
         qemu_log_mask(LOG_GUEST_ERROR,
                       "gt64120: Read-only register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -565,7 +565,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Not implemented */
         qemu_log_mask(LOG_UNIMP,
                       "gt64120: Unimplemented DMA register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -578,7 +578,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* Not implemented */
         qemu_log_mask(LOG_UNIMP,
                       "gt64120: Unimplemented timer register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
 
@@ -621,8 +621,8 @@ static void gt64120_writel(void *opaque, hwaddr addr,
     case GT_PCI1_CFGDATA:
         /* not implemented */
         qemu_log_mask(LOG_UNIMP,
-                      "gt64120: Unimplemented timer register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "gt64120: Unimplemented PCI register write "
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
     case GT_PCI0_CFGADDR:
@@ -682,7 +682,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "gt64120: Illegal register write "
-                      "reg:0x03%x size:%u value:0x%0*" PRIx64 "\n",
+                      "reg:0x%03x size:%u value:0x%0*" PRIx64 "\n",
                       saddr << 2, size, size << 1, val);
         break;
     }
@@ -958,7 +958,7 @@ static uint64_t gt64120_readl(void *opaque,
         val = s->regs[saddr];
         qemu_log_mask(LOG_GUEST_ERROR,
                       "gt64120: Illegal register read "
-                      "reg:0x03%x size:%u value:0x%0*x\n",
+                      "reg:0x%03x size:%u value:0x%0*x\n",
                       saddr << 2, size, size << 1, val);
         break;
     }
-- 
2.26.2

[PATCH 4/6] hw/mips/gt64xxx: Rename trace events related to interrupt registers

[Philippe Mathieu-Daudé]

We want to trace all register accesses. First rename the current
gt64120_read / gt64120_write events with '_intreg' suffix, as they
are restricted to interrupt registers.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 16 ++++++++--------
 hw/mips/trace-events  |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 8ff31380d74..9a12d00d1e1 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -642,19 +642,19 @@ static void gt64120_writel(void *opaque, hwaddr addr,
         /* not really implemented */
         s->regs[saddr] = ~(~(s->regs[saddr]) | ~(val & 0xfffffffe));
         s->regs[saddr] |= !!(s->regs[saddr] & 0xfffffffe);
-        trace_gt64120_write("INTRCAUSE", size, val);
+        trace_gt64120_write_intreg("INTRCAUSE", size, val);
         break;
     case GT_INTRMASK:
         s->regs[saddr] = val & 0x3c3ffffe;
-        trace_gt64120_write("INTRMASK", size, val);
+        trace_gt64120_write_intreg("INTRMASK", size, val);
         break;
     case GT_PCI0_ICMASK:
         s->regs[saddr] = val & 0x03fffffe;
-        trace_gt64120_write("ICMASK", size, val);
+        trace_gt64120_write_intreg("ICMASK", size, val);
         break;
     case GT_PCI0_SERR0MASK:
         s->regs[saddr] = val & 0x0000003f;
-        trace_gt64120_write("SERR0MASK", size, val);
+        trace_gt64120_write_intreg("SERR0MASK", size, val);
         break;
 
     /* Reserved when only PCI_0 is configured. */
@@ -929,19 +929,19 @@ static uint64_t gt64120_readl(void *opaque,
     /* Interrupts */
     case GT_INTRCAUSE:
         val = s->regs[saddr];
-        trace_gt64120_read("INTRCAUSE", size, val);
+        trace_gt64120_read_intreg("INTRCAUSE", size, val);
         break;
     case GT_INTRMASK:
         val = s->regs[saddr];
-        trace_gt64120_read("INTRMASK", size, val);
+        trace_gt64120_read_intreg("INTRMASK", size, val);
         break;
     case GT_PCI0_ICMASK:
         val = s->regs[saddr];
-        trace_gt64120_read("ICMASK", size, val);
+        trace_gt64120_read_intreg("ICMASK", size, val);
         break;
     case GT_PCI0_SERR0MASK:
         val = s->regs[saddr];
-        trace_gt64120_read("SERR0MASK", size, val);
+        trace_gt64120_read_intreg("SERR0MASK", size, val);
         break;
 
     /* Reserved when only PCI_0 is configured. */
diff --git a/hw/mips/trace-events b/hw/mips/trace-events
index 915139d9811..b7e934c3933 100644
--- a/hw/mips/trace-events
+++ b/hw/mips/trace-events
@@ -1,4 +1,4 @@
 # gt64xxx_pci.c
-gt64120_read(const char *regname, unsigned size, uint64_t value) "gt64120 read %s size:%u value:0x%08" PRIx64
-gt64120_write(const char *regname, unsigned size, uint64_t value) "gt64120 write %s size:%u value:0x%08" PRIx64
+gt64120_read_intreg(const char *regname, unsigned size, uint64_t value) "gt64120 read %s size:%u value:0x%08" PRIx64
+gt64120_write_intreg(const char *regname, unsigned size, uint64_t value) "gt64120 write %s size:%u value:0x%08" PRIx64
 gt64120_isd_remap(uint64_t from_length, uint64_t from_addr, uint64_t to_length, uint64_t to_addr) "ISD: 0x%08" PRIx64 "@0x%08" PRIx64 " -> 0x%08" PRIx64 "@0x%08" PRIx64
-- 
2.26.2

[PATCH 5/6] hw/mips/gt64xxx: Trace accesses to ISD registers

[Philippe Mathieu-Daudé]

Trace all accesses to Internal Space Decode (ISD) registers.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 2 ++
 hw/mips/trace-events  | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 9a12d00d1e1..43349d6837d 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -387,6 +387,7 @@ static void gt64120_writel(void *opaque, hwaddr addr,
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     uint32_t saddr = addr >> 2;
 
+    trace_gt64120_write(addr, val);
     if (!(s->regs[GT_CPU] & 0x00001000)) {
         val = bswap32(val);
     }
@@ -966,6 +967,7 @@ static uint64_t gt64120_readl(void *opaque,
     if (!(s->regs[GT_CPU] & 0x00001000)) {
         val = bswap32(val);
     }
+    trace_gt64120_read(addr, val);
 
     return val;
 }
diff --git a/hw/mips/trace-events b/hw/mips/trace-events
index b7e934c3933..13ee731a488 100644
--- a/hw/mips/trace-events
+++ b/hw/mips/trace-events
@@ -1,4 +1,6 @@
 # gt64xxx_pci.c
+gt64120_read(uint64_t addr, uint64_t value) "gt64120 read 0x%03"PRIx64" value:0x%08" PRIx64
+gt64120_write(uint64_t addr, uint64_t value) "gt64120 write 0x%03"PRIx64" value:0x%08" PRIx64
 gt64120_read_intreg(const char *regname, unsigned size, uint64_t value) "gt64120 read %s size:%u value:0x%08" PRIx64
 gt64120_write_intreg(const char *regname, unsigned size, uint64_t value) "gt64120 write %s size:%u value:0x%08" PRIx64
 gt64120_isd_remap(uint64_t from_length, uint64_t from_addr, uint64_t to_length, uint64_t to_addr) "ISD: 0x%08" PRIx64 "@0x%08" PRIx64 " -> 0x%08" PRIx64 "@0x%08" PRIx64
-- 
2.26.2

[PATCH 6/6] hw/mips/gt64xxx: Let the GT64120 manage the lower 512MiB hole

[Philippe Mathieu-Daudé]

Per the comment in the Malta board, the [0x0000.0000-0x2000.0000]
range is decoded by the GT64120, so move the "empty_slot" there.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/mips/gt64xxx_pci.c | 8 ++++++++
 hw/mips/malta.c       | 7 -------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 43349d6837d..a3926e5cb8a 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -29,6 +29,7 @@
 #include "hw/mips/mips.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"
+#include "hw/misc/empty_slot.h"
 #include "hw/southbridge/piix.h"
 #include "migration/vmstate.h"
 #include "hw/intc/i8259.h"
@@ -1206,6 +1207,13 @@ static void gt64120_realize(DeviceState *dev, Error **errp)
 
     memory_region_init_io(&s->ISD_mem, OBJECT(dev), &isd_mem_ops, s,
                           "gt64120-isd", 0x1000);
+
+    /*
+     * The whole address space decoded by the GT-64120A doesn't generate
+     * exception when accessing invalid memory. Create an empty slot to
+     * emulate this feature.
+     */
+    empty_slot_init("GT64120", 0, 0x20000000);
 }
 
 PCIBus *gt64120_register(qemu_irq *pic)
diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index 9afc0b427bf..b2469f8ee78 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -56,7 +56,6 @@
 #include "sysemu/runstate.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
-#include "hw/misc/empty_slot.h"
 #include "sysemu/kvm.h"
 #include "hw/semihosting/semihost.h"
 #include "hw/mips/cps.h"
@@ -1396,12 +1395,6 @@ void mips_malta_init(MachineState *machine)
 
     /* Northbridge */
     pci_bus = gt64120_register(s->i8259);
-    /*
-     * The whole address space decoded by the GT-64120A doesn't generate
-     * exception when accessing invalid memory. Create an empty slot to
-     * emulate this feature.
-     */
-    empty_slot_init("GT64120", 0, 0x20000000);
 
     /* Southbridge */
     dev = piix4_create(pci_bus, &isa_bus, &smbus);
-- 
2.26.2

Re: [PATCH 0/6] hw/mips/gt64120: Minor fixes

[Philippe Mathieu-Daudé]

Hi Zoltan,

On 3/5/21 5:21 PM, Philippe Mathieu-Daudé wrote:
> Trivial fixes extracted from another series which became too big,
> so I prefer to send them in a previous step.

I just realized I meant to Cc you on this series but forgot :/
As this model is pretty close to your MV64361 one, and this
series is trivial, do you mind reviewing it? It shouldn't take
more than 5min I hope ;)

Thanks,

Phil.

> 
> Philippe Mathieu-Daudé (6):
>   hw/mips/gt64xxx: Initialize ISD I/O memory region in DeviceRealize()
>   hw/mips/gt64xxx: Simplify ISD MemoryRegion read/write handlers
>   hw/mips/gt64xxx: Fix typos in qemu_log_mask() formats
>   hw/mips/gt64xxx: Rename trace events related to interrupt registers
>   hw/mips/gt64xxx: Trace accesses to ISD registers
>   hw/mips/gt64xxx: Let the GT64120 manage the lower 512MiB hole
> 
>  hw/mips/gt64xxx_pci.c | 67 +++++++++++++++++++++++++++----------------
>  hw/mips/malta.c       |  7 -----
>  hw/mips/trace-events  |  6 ++--
>  3 files changed, 47 insertions(+), 33 deletions(-)
> 

Re: [PATCH 0/6] hw/mips/gt64120: Minor fixes

[BALATON Zoltan]

[-- Attachment #1: Type: text/plain, Size: 1431 bytes --]

On Tue, 9 Mar 2021, Philippe Mathieu-Daudé wrote:
> Hi Zoltan,
>
> On 3/5/21 5:21 PM, Philippe Mathieu-Daudé wrote:
>> Trivial fixes extracted from another series which became too big,
>> so I prefer to send them in a previous step.
>
> I just realized I meant to Cc you on this series but forgot :/
> As this model is pretty close to your MV64361 one, and this
> series is trivial, do you mind reviewing it? It shouldn't take
> more than 5min I hope ;)

Hello,

I've noticed this patch series and considered reviewing it but could not 
do it in five minutes and I've lost it since. Can you forward it to me 
again so I can reply to the patches? (It's been a while I've written the 
mv64361 model so I may need to check datasheets again.)

Regards,
BALATON Zoltan

> Thanks,
>
> Phil.
>
>>
>> Philippe Mathieu-Daudé (6):
>>   hw/mips/gt64xxx: Initialize ISD I/O memory region in DeviceRealize()
>>   hw/mips/gt64xxx: Simplify ISD MemoryRegion read/write handlers
>>   hw/mips/gt64xxx: Fix typos in qemu_log_mask() formats
>>   hw/mips/gt64xxx: Rename trace events related to interrupt registers
>>   hw/mips/gt64xxx: Trace accesses to ISD registers
>>   hw/mips/gt64xxx: Let the GT64120 manage the lower 512MiB hole
>>
>>  hw/mips/gt64xxx_pci.c | 67 +++++++++++++++++++++++++++----------------
>>  hw/mips/malta.c       |  7 -----
>>  hw/mips/trace-events  |  6 ++--
>>  3 files changed, 47 insertions(+), 33 deletions(-)
>>
>
>