From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56478) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwDkK-0001IS-DH for qemu-devel@nongnu.org; Mon, 17 Oct 2016 15:38:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bwDkJ-0007q5-GH for qemu-devel@nongnu.org; Mon, 17 Oct 2016 15:38:52 -0400 From: Eric Auger Date: Mon, 17 Oct 2016 19:38:25 +0000 Message-Id: <1476733110-14293-4-git-send-email-eric.auger@redhat.com> In-Reply-To: <1476733110-14293-1-git-send-email-eric.auger@redhat.com> References: <1476733110-14293-1-git-send-email-eric.auger@redhat.com> Subject: [Qemu-devel] [RFC v5 3/8] memory: Add reserved_iova region type List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger@redhat.com, eric.auger.pro@gmail.com, peter.maydell@linaro.org, qemu-arm@nongnu.org, qemu-devel@nongnu.org, alex.williamson@redhat.com, pranav.sawargaonkar@gmail.com Cc: diana.craciun@freescale.com, christoffer.dall@linaro.org, drjones@redhat.com, Bharat.Bhushan@freescale.com, fkan@apm.com Introduce a new reserved_iova region type. This type of iova region is bound to be used by the kernel to map some host physical addresses (typically MSI frames). A new initializer, memory_region_init_reserved_iova is introduced, as well as a test function, memory_region_is_reserved_iova. Signed-off-by: Eric Auger --- include/exec/memory.h | 29 +++++++++++++++++++++++++++++ memory.c | 11 +++++++++++ 2 files changed, 40 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index 10d7eac..f97b1f4 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -191,6 +191,7 @@ struct MemoryRegion { /* The following fields should fit in a cache line */ bool romd_mode; bool ram; + bool reserved_iova; bool subpage; bool readonly; /* For RAM regions */ bool rom_device; @@ -385,6 +386,21 @@ void memory_region_init_ram(MemoryRegion *mr, Error **errp); /** + * memory_region_init_reserved_iova: Initialize reserved iova memory region + * + * @mr: the #MemoryRegion to be initialized. + * @owner: the object that tracks the region's reference count + * @name: the name of the region. + * @size: size of the region. + * @errp: pointer to Error*, to store an error if it happens. + */ +void memory_region_init_reserved_iova(MemoryRegion *mr, + struct Object *owner, + const char *name, + uint64_t size, + Error **errp); + +/** * memory_region_init_resizeable_ram: Initialize memory region with resizeable * RAM. Accesses into the region will * modify memory directly. Only an initial @@ -573,6 +589,19 @@ static inline bool memory_region_is_ram(MemoryRegion *mr) } /** + * memory_region_is_reserved_iova: check whether a memory region corresponds to + reserved iova + * + * Returns %true is a memory region is reserved iova + * + * @mr: the memory region being queried + */ +static inline bool memory_region_is_reserved_iova(MemoryRegion *mr) +{ + return mr->reserved_iova; +} + +/** * memory_region_is_skip_dump: check whether a memory region should not be * dumped * diff --git a/memory.c b/memory.c index 58f9269..00a0ebe 100644 --- a/memory.c +++ b/memory.c @@ -1309,6 +1309,17 @@ void memory_region_init_ram(MemoryRegion *mr, mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; } +void memory_region_init_reserved_iova(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + Error **errp) +{ + memory_region_init(mr, owner, name, size); + mr->reserved_iova = true; + mr->terminates = true; +} + void memory_region_init_resizeable_ram(MemoryRegion *mr, Object *owner, const char *name, -- 1.9.1