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nubus: add trace-events for empty slot accesses

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Increase the max_access_size to 4 bytes for empty Nubus slot and super slot
accesses to allow tracing of the Nubus enumeration process by the guest OS.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210924073808.1041-8-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2021-09-24 08:37:55 +01:00 • committed by Laurent Vivier
parent c0ad4eaf44
commit ce0e6a2c55
4 changed files with 16 additions and 3 deletions
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10
hw/nubus/nubus-bus.c
View file

@ -19,6 +19,7 @@
#include "qemu/osdep.h"
#include "hw/nubus/nubus.h"
#include "qapi/error.h"
#include "trace.h"
static NubusBus *nubus_find(void)
@ -31,12 +32,13 @@ static void nubus_slot_write(void *opaque, hwaddr addr, uint64_t val,
unsigned int size)
{
/* read only */
trace_nubus_slot_write(addr, val, size);
}
static uint64_t nubus_slot_read(void *opaque, hwaddr addr,
unsigned int size)
{
trace_nubus_slot_read(addr, size);
return 0;
}
@ -46,7 +48,7 @@ static const MemoryRegionOps nubus_slot_ops = {
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
.max_access_size = 4,
},
};
@ -54,11 +56,13 @@ static void nubus_super_slot_write(void *opaque, hwaddr addr, uint64_t val,
unsigned int size)
{
/* read only */
trace_nubus_super_slot_write(addr, val, size);
}
static uint64_t nubus_super_slot_read(void *opaque, hwaddr addr,
unsigned int size)
{
trace_nubus_super_slot_read(addr, size);
return 0;
}
@ -68,7 +72,7 @@ static const MemoryRegionOps nubus_super_slot_ops = {
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
.max_access_size = 4,
},
};