| Message ID | 20240503014449.1046238-7-edgar.iglesias@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | xen: Support grant mappings | expand |
On Fri, 3 May 2024, Edgar E. Iglesias wrote: > From: "Edgar E. Iglesias" <edgar.iglesias@amd.com> > > Pass the ram_addr offset to xen_map_cache. > This is in preparation for adding grant mappings that need > to compute the address within the RAMBlock. > > No functional changes. > > Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com> > --- > hw/xen/xen-mapcache.c | 16 +++++++++++----- > include/sysemu/xen-mapcache.h | 2 ++ > system/physmem.c | 9 +++++---- > 3 files changed, 18 insertions(+), 9 deletions(-) > > diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c > index ec95445696..26bc38a9e3 100644 > --- a/hw/xen/xen-mapcache.c > +++ b/hw/xen/xen-mapcache.c > @@ -167,7 +167,8 @@ static void xen_remap_bucket(MapCache *mc, > void *vaddr, > hwaddr size, > hwaddr address_index, > - bool dummy) > + bool dummy, > + ram_addr_t ram_offset) > { > uint8_t *vaddr_base; > xen_pfn_t *pfns; > @@ -266,6 +267,7 @@ static void xen_remap_bucket(MapCache *mc, > > static uint8_t *xen_map_cache_unlocked(MapCache *mc, > hwaddr phys_addr, hwaddr size, > + ram_addr_t ram_offset, > uint8_t lock, bool dma, bool is_write) > { > MapCacheEntry *entry, *pentry = NULL, > @@ -337,14 +339,16 @@ tryagain: > if (!entry) { > entry = g_new0(MapCacheEntry, 1); > pentry->next = entry; > - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); > + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, > + ram_offset); > } else if (!entry->lock) { > if (!entry->vaddr_base || entry->paddr_index != address_index || > entry->size != cache_size || > !test_bits(address_offset >> XC_PAGE_SHIFT, > test_bit_size >> XC_PAGE_SHIFT, > entry->valid_mapping)) { > - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); > + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, > + ram_offset); > } > } > > @@ -391,13 +395,15 @@ tryagain: > > uint8_t *xen_map_cache(MemoryRegion *mr, > hwaddr phys_addr, hwaddr size, > + ram_addr_t ram_addr_offset, > uint8_t lock, bool dma, > bool is_write) > { > uint8_t *p; > > mapcache_lock(mapcache); > - p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma, is_write); > + p = xen_map_cache_unlocked(mapcache, phys_addr, size, ram_addr_offset, > + lock, dma, is_write); > mapcache_unlock(mapcache); > return p; > } > @@ -632,7 +638,7 @@ static uint8_t *xen_replace_cache_entry_unlocked(MapCache *mc, > trace_xen_replace_cache_entry_dummy(old_phys_addr, new_phys_addr); > > xen_remap_bucket(mc, entry, entry->vaddr_base, > - cache_size, address_index, false); > + cache_size, address_index, false, new_phys_addr); Everything else makes sense, but I don't understand how can it be that new_phys_addr is the block->offset here? > if (!test_bits(address_offset >> XC_PAGE_SHIFT, > test_bit_size >> XC_PAGE_SHIFT, > entry->valid_mapping)) { > diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h > index 1ec9e66752..b5e3ea1bc0 100644 > --- a/include/sysemu/xen-mapcache.h > +++ b/include/sysemu/xen-mapcache.h > @@ -19,6 +19,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset, > void xen_map_cache_init(phys_offset_to_gaddr_t f, > void *opaque); > uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, > + ram_addr_t ram_addr_offset, > uint8_t lock, bool dma, > bool is_write); > ram_addr_t xen_ram_addr_from_mapcache(void *ptr); > @@ -37,6 +38,7 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f, > static inline uint8_t *xen_map_cache(MemoryRegion *mr, > hwaddr phys_addr, > hwaddr size, > + ram_addr_t ram_addr_offset, > uint8_t lock, > bool dma, > bool is_write) > diff --git a/system/physmem.c b/system/physmem.c > index b7847db1a2..33d09f7571 100644 > --- a/system/physmem.c > +++ b/system/physmem.c > @@ -2231,13 +2231,14 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr, > */ > if (xen_mr_is_memory(block->mr)) { > return xen_map_cache(block->mr, block->offset + addr, > - len, lock, lock, > - is_write); > + len, block->offset, > + lock, lock, is_write); > } > > block->host = xen_map_cache(block->mr, block->offset, > - block->max_length, 1, > - lock, is_write); > + block->max_length, > + block->offset, > + 1, lock, is_write); > } This is OK but it is really making it clear that there is a mistake in the code. OK for now but it is something to fix in the future. > return ramblock_ptr(block, addr); > -- > 2.40.1 >
On Thu, May 16, 2024 at 1:08 AM Stefano Stabellini <sstabellini@kernel.org> wrote: > > On Fri, 3 May 2024, Edgar E. Iglesias wrote: > > From: "Edgar E. Iglesias" <edgar.iglesias@amd.com> > > > > Pass the ram_addr offset to xen_map_cache. > > This is in preparation for adding grant mappings that need > > to compute the address within the RAMBlock. > > > > No functional changes. > > > > Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com> > > --- > > hw/xen/xen-mapcache.c | 16 +++++++++++----- > > include/sysemu/xen-mapcache.h | 2 ++ > > system/physmem.c | 9 +++++---- > > 3 files changed, 18 insertions(+), 9 deletions(-) > > > > diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c > > index ec95445696..26bc38a9e3 100644 > > --- a/hw/xen/xen-mapcache.c > > +++ b/hw/xen/xen-mapcache.c > > @@ -167,7 +167,8 @@ static void xen_remap_bucket(MapCache *mc, > > void *vaddr, > > hwaddr size, > > hwaddr address_index, > > - bool dummy) > > + bool dummy, > > + ram_addr_t ram_offset) > > { > > uint8_t *vaddr_base; > > xen_pfn_t *pfns; > > @@ -266,6 +267,7 @@ static void xen_remap_bucket(MapCache *mc, > > > > static uint8_t *xen_map_cache_unlocked(MapCache *mc, > > hwaddr phys_addr, hwaddr size, > > + ram_addr_t ram_offset, > > uint8_t lock, bool dma, bool is_write) > > { > > MapCacheEntry *entry, *pentry = NULL, > > @@ -337,14 +339,16 @@ tryagain: > > if (!entry) { > > entry = g_new0(MapCacheEntry, 1); > > pentry->next = entry; > > - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); > > + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, > > + ram_offset); > > } else if (!entry->lock) { > > if (!entry->vaddr_base || entry->paddr_index != address_index || > > entry->size != cache_size || > > !test_bits(address_offset >> XC_PAGE_SHIFT, > > test_bit_size >> XC_PAGE_SHIFT, > > entry->valid_mapping)) { > > - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); > > + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, > > + ram_offset); > > } > > } > > > > @@ -391,13 +395,15 @@ tryagain: > > > > uint8_t *xen_map_cache(MemoryRegion *mr, > > hwaddr phys_addr, hwaddr size, > > + ram_addr_t ram_addr_offset, > > uint8_t lock, bool dma, > > bool is_write) > > { > > uint8_t *p; > > > > mapcache_lock(mapcache); > > - p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma, is_write); > > + p = xen_map_cache_unlocked(mapcache, phys_addr, size, ram_addr_offset, > > + lock, dma, is_write); > > mapcache_unlock(mapcache); > > return p; > > } > > @@ -632,7 +638,7 @@ static uint8_t *xen_replace_cache_entry_unlocked(MapCache *mc, > > trace_xen_replace_cache_entry_dummy(old_phys_addr, new_phys_addr); > > > > xen_remap_bucket(mc, entry, entry->vaddr_base, > > - cache_size, address_index, false); > > + cache_size, address_index, false, new_phys_addr); > > Everything else makes sense, but I don't understand how can it be that > new_phys_addr is the block->offset here? > Agreed, this should be old_phys_addr propagated via phys_offset from xen_add_to_physmap(). The reason this didn't have an effect here is that we currently only use the ram_addr offset for grants, and xen_replace_cache_entry is never called for grants. Anyway, I'll fix this in the next version! > > > if (!test_bits(address_offset >> XC_PAGE_SHIFT, > > test_bit_size >> XC_PAGE_SHIFT, > > entry->valid_mapping)) { > > diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h > > index 1ec9e66752..b5e3ea1bc0 100644 > > --- a/include/sysemu/xen-mapcache.h > > +++ b/include/sysemu/xen-mapcache.h > > @@ -19,6 +19,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset, > > void xen_map_cache_init(phys_offset_to_gaddr_t f, > > void *opaque); > > uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, > > + ram_addr_t ram_addr_offset, > > uint8_t lock, bool dma, > > bool is_write); > > ram_addr_t xen_ram_addr_from_mapcache(void *ptr); > > @@ -37,6 +38,7 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f, > > static inline uint8_t *xen_map_cache(MemoryRegion *mr, > > hwaddr phys_addr, > > hwaddr size, > > + ram_addr_t ram_addr_offset, > > uint8_t lock, > > bool dma, > > bool is_write) > > diff --git a/system/physmem.c b/system/physmem.c > > index b7847db1a2..33d09f7571 100644 > > --- a/system/physmem.c > > +++ b/system/physmem.c > > @@ -2231,13 +2231,14 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr, > > */ > > if (xen_mr_is_memory(block->mr)) { > > return xen_map_cache(block->mr, block->offset + addr, > > - len, lock, lock, > > - is_write); > > + len, block->offset, > > + lock, lock, is_write); > > } > > > > block->host = xen_map_cache(block->mr, block->offset, > > - block->max_length, 1, > > - lock, is_write); > > + block->max_length, > > + block->offset, > > + 1, lock, is_write); > > } > > This is OK but it is really making it clear that there is a mistake in > the code. OK for now but it is something to fix in the future. > > > > return ramblock_ptr(block, addr); > > -- > > 2.40.1 > >
diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c index ec95445696..26bc38a9e3 100644 --- a/hw/xen/xen-mapcache.c +++ b/hw/xen/xen-mapcache.c @@ -167,7 +167,8 @@ static void xen_remap_bucket(MapCache *mc, void *vaddr, hwaddr size, hwaddr address_index, - bool dummy) + bool dummy, + ram_addr_t ram_offset) { uint8_t *vaddr_base; xen_pfn_t *pfns; @@ -266,6 +267,7 @@ static void xen_remap_bucket(MapCache *mc, static uint8_t *xen_map_cache_unlocked(MapCache *mc, hwaddr phys_addr, hwaddr size, + ram_addr_t ram_offset, uint8_t lock, bool dma, bool is_write) { MapCacheEntry *entry, *pentry = NULL, @@ -337,14 +339,16 @@ tryagain: if (!entry) { entry = g_new0(MapCacheEntry, 1); pentry->next = entry; - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, + ram_offset); } else if (!entry->lock) { if (!entry->vaddr_base || entry->paddr_index != address_index || entry->size != cache_size || !test_bits(address_offset >> XC_PAGE_SHIFT, test_bit_size >> XC_PAGE_SHIFT, entry->valid_mapping)) { - xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy); + xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy, + ram_offset); } } @@ -391,13 +395,15 @@ tryagain: uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, + ram_addr_t ram_addr_offset, uint8_t lock, bool dma, bool is_write) { uint8_t *p; mapcache_lock(mapcache); - p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma, is_write); + p = xen_map_cache_unlocked(mapcache, phys_addr, size, ram_addr_offset, + lock, dma, is_write); mapcache_unlock(mapcache); return p; } @@ -632,7 +638,7 @@ static uint8_t *xen_replace_cache_entry_unlocked(MapCache *mc, trace_xen_replace_cache_entry_dummy(old_phys_addr, new_phys_addr); xen_remap_bucket(mc, entry, entry->vaddr_base, - cache_size, address_index, false); + cache_size, address_index, false, new_phys_addr); if (!test_bits(address_offset >> XC_PAGE_SHIFT, test_bit_size >> XC_PAGE_SHIFT, entry->valid_mapping)) { diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h index 1ec9e66752..b5e3ea1bc0 100644 --- a/include/sysemu/xen-mapcache.h +++ b/include/sysemu/xen-mapcache.h @@ -19,6 +19,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset, void xen_map_cache_init(phys_offset_to_gaddr_t f, void *opaque); uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, + ram_addr_t ram_addr_offset, uint8_t lock, bool dma, bool is_write); ram_addr_t xen_ram_addr_from_mapcache(void *ptr); @@ -37,6 +38,7 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f, static inline uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size, + ram_addr_t ram_addr_offset, uint8_t lock, bool dma, bool is_write) diff --git a/system/physmem.c b/system/physmem.c index b7847db1a2..33d09f7571 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -2231,13 +2231,14 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr, */ if (xen_mr_is_memory(block->mr)) { return xen_map_cache(block->mr, block->offset + addr, - len, lock, lock, - is_write); + len, block->offset, + lock, lock, is_write); } block->host = xen_map_cache(block->mr, block->offset, - block->max_length, 1, - lock, is_write); + block->max_length, + block->offset, + 1, lock, is_write); } return ramblock_ptr(block, addr);