From 75f01c68b5c630a9a6b21b93febf3a871a9111ba Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Sat, 15 Jan 2022 21:37:23 +0100 Subject: [PATCH] exec/memory: Extract address_space_set() from dma_memory_set() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit dma_memory_set() does a DMA barrier, set the address space with a constant value. The constant value filling code is not specific to DMA and can be used for AddressSpace. Extract it as a new helper: address_space_set(). Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Laurent Vivier Reviewed-by: Stefano Garzarella Reviewed-by: Richard Henderson [lv: rebase] Signed-off-by: Laurent Vivier Reviewed-by: David Hildenbrand Reviewed-by: Peter Xu Message-Id: <20220115203725.3834712-2-laurent@vivier.eu> --- include/exec/memory.h | 16 ++++++++++++++++ softmmu/dma-helpers.c | 15 +-------------- softmmu/physmem.c | 19 +++++++++++++++++++ 3 files changed, 36 insertions(+), 14 deletions(-) diff --git a/include/exec/memory.h b/include/exec/memory.h index 63be794a06..4d5997e6bb 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -2908,6 +2908,22 @@ address_space_write_cached(MemoryRegionCache *cache, hwaddr addr, } } +/** + * address_space_set: Fill address space with a constant byte. + * + * Return a MemTxResult indicating whether the operation succeeded + * or failed (eg unassigned memory, device rejected the transaction, + * IOMMU fault). + * + * @as: #AddressSpace to be accessed + * @addr: address within that address space + * @c: constant byte to fill the memory + * @len: the number of bytes to fill with the constant byte + * @attrs: memory transaction attributes + */ +MemTxResult address_space_set(AddressSpace *as, hwaddr addr, + uint8_t c, hwaddr len, MemTxAttrs attrs); + #ifdef NEED_CPU_H /* enum device_endian to MemOp. */ static inline MemOp devend_memop(enum device_endian end) diff --git a/softmmu/dma-helpers.c b/softmmu/dma-helpers.c index 1c6fba6a11..160095e4ba 100644 --- a/softmmu/dma-helpers.c +++ b/softmmu/dma-helpers.c @@ -23,20 +23,7 @@ MemTxResult dma_memory_set(AddressSpace *as, dma_addr_t addr, { dma_barrier(as, DMA_DIRECTION_FROM_DEVICE); -#define FILLBUF_SIZE 512 - uint8_t fillbuf[FILLBUF_SIZE]; - int l; - MemTxResult error = MEMTX_OK; - - memset(fillbuf, c, FILLBUF_SIZE); - while (len > 0) { - l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE; - error |= address_space_write(as, addr, attrs, fillbuf, l); - len -= l; - addr += l; - } - - return error; + return address_space_set(as, addr, c, len, attrs); } void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint, diff --git a/softmmu/physmem.c b/softmmu/physmem.c index 3524c04c2a..dddf70edf5 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -2927,6 +2927,25 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, } } +MemTxResult address_space_set(AddressSpace *as, hwaddr addr, + uint8_t c, hwaddr len, MemTxAttrs attrs) +{ +#define FILLBUF_SIZE 512 + uint8_t fillbuf[FILLBUF_SIZE]; + int l; + MemTxResult error = MEMTX_OK; + + memset(fillbuf, c, FILLBUF_SIZE); + while (len > 0) { + l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE; + error |= address_space_write(as, addr, attrs, fillbuf, l); + len -= l; + addr += l; + } + + return error; +} + void cpu_physical_memory_rw(hwaddr addr, void *buf, hwaddr len, bool is_write) {