From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45756) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bpgiJ-00027B-QE for qemu-devel@nongnu.org; Thu, 29 Sep 2016 15:09:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bpgiE-0007p9-89 for qemu-devel@nongnu.org; Thu, 29 Sep 2016 15:09:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49474) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bpgiD-0007ou-Sh for qemu-devel@nongnu.org; Thu, 29 Sep 2016 15:09:42 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7A24790E58 for ; Thu, 29 Sep 2016 19:09:41 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" Date: Thu, 29 Sep 2016 20:09:37 +0100 Message-Id: <1475176178-4873-2-git-send-email-dgilbert@redhat.com> In-Reply-To: <1475176178-4873-1-git-send-email-dgilbert@redhat.com> References: <1475176178-4873-1-git-send-email-dgilbert@redhat.com> Subject: [Qemu-devel] [PATCH 1/2] RAMBlocks: Store page size List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, pbonzini@redhat.com, quintela@redhat.com, amit.shah@redhat.com From: "Dr. David Alan Gilbert" Store the page size in each RAMBlock, we need it later. Signed-off-by: Dr. David Alan Gilbert --- exec.c | 17 +++++++++++------ include/exec/cpu-common.h | 1 + include/exec/ram_addr.h | 1 + 3 files changed, 13 insertions(+), 6 deletions(-) diff --git a/exec.c b/exec.c index c8389f9..e111323 100644 --- a/exec.c +++ b/exec.c @@ -1201,7 +1201,6 @@ static void *file_ram_alloc(RAMBlock *block, char *c; void *area = MAP_FAILED; int fd = -1; - int64_t page_size; if (kvm_enabled() && !kvm_has_sync_mmu()) { error_setg(errp, @@ -1256,17 +1255,17 @@ static void *file_ram_alloc(RAMBlock *block, */ } - page_size = qemu_fd_getpagesize(fd); - block->mr->align = MAX(page_size, QEMU_VMALLOC_ALIGN); + block->page_size = qemu_fd_getpagesize(fd); + block->mr->align = MAX(block->page_size, QEMU_VMALLOC_ALIGN); - if (memory < page_size) { + if (memory < block->page_size) { error_setg(errp, "memory size 0x" RAM_ADDR_FMT " must be equal to " "or larger than page size 0x%" PRIx64, - memory, page_size); + memory, block->page_size); goto error; } - memory = ROUND_UP(memory, page_size); + memory = ROUND_UP(memory, block->page_size); /* * ftruncate is not supported by hugetlbfs in older @@ -1421,6 +1420,11 @@ void qemu_ram_unset_idstr(RAMBlock *block) } } +size_t qemu_ram_pagesize(RAMBlock *rb) +{ + return rb->page_size; +} + static int memory_try_enable_merging(void *addr, size_t len) { if (!machine_mem_merge(current_machine)) { @@ -1660,6 +1664,7 @@ RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size, new_block->max_length = max_size; assert(max_size >= size); new_block->fd = -1; + new_block->page_size = getpagesize(); new_block->host = host; if (host) { new_block->flags |= RAM_PREALLOC; diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 869ba41..cffdc13 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -63,6 +63,7 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); +size_t qemu_ram_pagesize(RAMBlock *block); void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, int len, int is_write); diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index 2a9465d..54d7108 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -36,6 +36,7 @@ struct RAMBlock { /* RCU-enabled, writes protected by the ramlist lock */ QLIST_ENTRY(RAMBlock) next; int fd; + size_t page_size; }; static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset) -- 2.7.4