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hw/xen/xen-mapcache.c: convert DPRINTF to tracepoints

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Tracing DPRINTFs to stderr might not be desired. A developer that relies
on tracepoints should be able to opt-in to each tracepoint and rely on
QEMU's log redirection, instead of stderr by default.

This commit converts DPRINTFs in this file that are used for tracing
into tracepoints.

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 2fbe1fbc59078e384761c932e97cfa4276a53d75.1706544115.git.manos.pitsidianakis@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Manos Pitsidianakis 2024-01-29 18:09:40 +02:00 committed by Peter Maydell
parent 6b4a990b42
commit 0402b96830
2 changed files with 35 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
hw/xen/trace-events
View File

@ -60,3 +60,14 @@ cpu_ioreq_config_write(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, ui
xen_map_cache(uint64_t phys_addr) "want 0x%"PRIx64
xen_remap_bucket(uint64_t index) "index 0x%"PRIx64
xen_map_cache_return(void* ptr) "%p"
xen_map_cache_init(uint64_t nr_buckets, uint64_t size) "nr_buckets = 0x%"PRIx64" size 0x%"PRIx64
xen_replace_cache_entry_dummy(uint64_t old_phys_addr, uint64_t new_phys_addr) "Replacing a dummy mapcache entry for 0x%"PRIx64" with 0x%"PRIx64
xen_invalidate_map_cache_entry_unlocked_not_found(void *p) "could not find %p"
xen_invalidate_map_cache_entry_unlocked_found(uint64_t addr, void *p) " 0x%"PRIx64" -> %p is present"
xen_invalidate_map_cache_entry_unlocked_miss(void *buffer) "Trying to unmap address %p that is not in the mapcache"
xen_replace_cache_entry_unlocked_could_not_update_entry(uint64_t old_phys_addr) "Unable to update a mapcache entry for 0x%"PRIx64
xen_ram_addr_from_mapcache_not_found(void *p) "could not find %p"
xen_ram_addr_from_mapcache_found(uint64_t addr, void *p) " 0x%"PRIx64" -> %p is present"
xen_ram_addr_from_mapcache_not_in_cache(void *p) "Trying to find address %p that is not in the mapcache"
xen_replace_cache_entry_unlocked(uint64_t old_phys_addr) "Trying to update an entry for 0x%"PRIx64" that is not in the mapcache"
xen_invalidate_map_cache(uint64_t paddr_index, void *vaddr_req) "Locked DMA mapping while invalidating mapcache 0x%"PRIx64" -> %p is present"

54
hw/xen/xen-mapcache.c
View File

@ -22,16 +22,6 @@
#include "trace.h"
//#define MAPCACHE_DEBUG
#ifdef MAPCACHE_DEBUG
# define DPRINTF(fmt, ...) do { \
fprintf(stderr, "xen_mapcache: " fmt, ## __VA_ARGS__); \
} while (0)
#else
# define DPRINTF(fmt, ...) do { } while (0)
#endif
#if HOST_LONG_BITS == 32
# define MCACHE_BUCKET_SHIFT 16
# define MCACHE_MAX_SIZE (1UL<<31) /* 2GB Cap */
@ -145,8 +135,7 @@ void xen_map_cache_init(phys_offset_to_gaddr_t f, void *opaque)
size = mapcache->nr_buckets * sizeof (MapCacheEntry);
size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1);
DPRINTF("%s, nr_buckets = %lx size %lu\n", __func__,
mapcache->nr_buckets, size);
trace_xen_map_cache_init(mapcache->nr_buckets, size);
mapcache->entry = g_malloc0(size);
}
@ -286,7 +275,9 @@ tryagain:
test_bits(address_offset >> XC_PAGE_SHIFT,
test_bit_size >> XC_PAGE_SHIFT,
mapcache->last_entry->valid_mapping)) {
trace_xen_map_cache_return(mapcache->last_entry->vaddr_base + address_offset);
trace_xen_map_cache_return(
mapcache->last_entry->vaddr_base + address_offset
);
return mapcache->last_entry->vaddr_base + address_offset;
}
@ -368,7 +359,9 @@ tryagain:
QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next);
}
trace_xen_map_cache_return(mapcache->last_entry->vaddr_base + address_offset);
trace_xen_map_cache_return(
mapcache->last_entry->vaddr_base + address_offset
);
return mapcache->last_entry->vaddr_base + address_offset;
}
@ -402,10 +395,10 @@ ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
}
}
if (!found) {
fprintf(stderr, "%s, could not find %p\n", __func__, ptr);
trace_xen_ram_addr_from_mapcache_not_found(ptr);
QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
DPRINTF(" "HWADDR_FMT_plx" -> %p is present\n", reventry->paddr_index,
reventry->vaddr_req);
trace_xen_ram_addr_from_mapcache_found(reventry->paddr_index,
reventry->vaddr_req);
}
abort();
return 0;
@ -416,7 +409,7 @@ ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
entry = entry->next;
}
if (!entry) {
DPRINTF("Trying to find address %p that is not in the mapcache!\n", ptr);
trace_xen_ram_addr_from_mapcache_not_in_cache(ptr);
raddr = 0;
} else {
raddr = (reventry->paddr_index << MCACHE_BUCKET_SHIFT) +
@ -443,9 +436,12 @@ static void xen_invalidate_map_cache_entry_unlocked(uint8_t *buffer)
}
}
if (!found) {
DPRINTF("%s, could not find %p\n", __func__, buffer);
trace_xen_invalidate_map_cache_entry_unlocked_not_found(buffer);
QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
DPRINTF(" "HWADDR_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req);
trace_xen_invalidate_map_cache_entry_unlocked_found(
reventry->paddr_index,
reventry->vaddr_req
);
}
return;
}
@ -463,7 +459,7 @@ static void xen_invalidate_map_cache_entry_unlocked(uint8_t *buffer)
entry = entry->next;
}
if (!entry) {
DPRINTF("Trying to unmap address %p that is not in the mapcache!\n", buffer);
trace_xen_invalidate_map_cache_entry_unlocked_miss(buffer);
return;
}
entry->lock--;
@ -502,9 +498,8 @@ void xen_invalidate_map_cache(void)
if (!reventry->dma) {
continue;
}
fprintf(stderr, "Locked DMA mapping while invalidating mapcache!"
" "HWADDR_FMT_plx" -> %p is present\n",
reventry->paddr_index, reventry->vaddr_req);
trace_xen_invalidate_map_cache(reventry->paddr_index,
reventry->vaddr_req);
}
for (i = 0; i < mapcache->nr_buckets; i++) {
@ -562,24 +557,23 @@ static uint8_t *xen_replace_cache_entry_unlocked(hwaddr old_phys_addr,
entry = entry->next;
}
if (!entry) {
DPRINTF("Trying to update an entry for "HWADDR_FMT_plx \
"that is not in the mapcache!\n", old_phys_addr);
trace_xen_replace_cache_entry_unlocked(old_phys_addr);
return NULL;
}
address_index = new_phys_addr >> MCACHE_BUCKET_SHIFT;
address_offset = new_phys_addr & (MCACHE_BUCKET_SIZE - 1);
fprintf(stderr, "Replacing a dummy mapcache entry for "HWADDR_FMT_plx \
" with "HWADDR_FMT_plx"\n", old_phys_addr, new_phys_addr);
trace_xen_replace_cache_entry_dummy(old_phys_addr, new_phys_addr);
xen_remap_bucket(entry, entry->vaddr_base,
cache_size, address_index, false);
if (!test_bits(address_offset >> XC_PAGE_SHIFT,
test_bit_size >> XC_PAGE_SHIFT,
entry->valid_mapping)) {
DPRINTF("Unable to update a mapcache entry for "HWADDR_FMT_plx"!\n",
old_phys_addr);
trace_xen_replace_cache_entry_unlocked_could_not_update_entry(
old_phys_addr
);
return NULL;
}