From patchwork Sat Jun 22 06:07:04 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kiszka X-Patchwork-Id: 253349 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 0D79D2C0402 for ; Sat, 22 Jun 2013 16:12:12 +1000 (EST) Received: from localhost ([::1]:48169 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UqH3S-00071L-2P for incoming@patchwork.ozlabs.org; Sat, 22 Jun 2013 02:12:10 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44059) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UqGzA-0007bf-OG for qemu-devel@nongnu.org; Sat, 22 Jun 2013 02:07:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UqGz8-0004uL-Qm for qemu-devel@nongnu.org; Sat, 22 Jun 2013 02:07:44 -0400 Received: from mout.web.de ([212.227.17.11]:58847) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UqGz8-0004u9-GE for qemu-devel@nongnu.org; Sat, 22 Jun 2013 02:07:42 -0400 Received: from localhost.localdomain ([95.157.58.223]) by smtp.web.de (mrweb101) with ESMTPSA (Nemesis) id 0LoYjO-1UOKoL2tqs-00gU8b; Sat, 22 Jun 2013 08:07:24 +0200 From: Jan Kiszka To: qemu-devel Date: Sat, 22 Jun 2013 08:07:04 +0200 Message-Id: X-Mailer: git-send-email 1.7.3.4 In-Reply-To: References: In-Reply-To: References: X-Provags-ID: V03:K0:Tsw+9RHgGZf9Q8qMeoqmoL6BPWeOkXj8uLFAApprz3JJUceMpCG vXXl7ldoFV+ZmIgAyXChIQjEF6n7aKk9vHii+tvrFO6xKI/BW/T991UCg7uH/E+wa8/KO8M C7JeE+jCwLSEsvuY2AxwiITK8ngaOkOv1rdcwVXygF8Kfd9dJCLxcsQM6+uUwsSjbiZQ6Y5 EcCQmRJli72iCcCuDw4yg== X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 212.227.17.11 Cc: Paolo Bonzini , Liu Ping Fan , =?UTF-8?q?Herv=C3=A9=20Poussineau?= , =?UTF-8?q?Andreas=20F=C3=A4rber?= , Jan Kiszka Subject: [Qemu-devel] [PATCH v3 11/14] ioport: Switch dispatching to memory core layer X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Jan Kiszka The current ioport dispatcher is a complex beast, mostly due to the need to deal with old portio interface users. But we can overcome it without converting all portio users by embedding the required base address of a MemoryRegionPortio access into that data structure. That removes the need to have the additional MemoryRegionIORange structure in the loop on every access. To handle old portio memory ops, we simply install dispatching handlers for portio memory regions when registering them with the memory core. This removes the need for the old_portio field. We can drop the additional aliasing of ioport regions and also the special address space listener. cpu_in and cpu_out now simply call address_space_read/write. And we can concentrate portio handling in a single source file. Signed-off-by: Jan Kiszka --- exec.c | 27 -------- include/exec/ioport.h | 1 - include/exec/memory-internal.h | 2 - include/exec/memory.h | 5 +- ioport.c | 137 +++++++++++++++++++++++++++++----------- memory.c | 88 ------------------------- 6 files changed, 101 insertions(+), 159 deletions(-) diff --git a/exec.c b/exec.c index 0b0118b..87c7ef3 100644 --- a/exec.c +++ b/exec.c @@ -1760,26 +1760,6 @@ static void core_log_global_stop(MemoryListener *listener) cpu_physical_memory_set_dirty_tracking(0); } -static void io_region_add(MemoryListener *listener, - MemoryRegionSection *section) -{ - MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1); - - mrio->mr = section->mr; - mrio->offset = section->offset_within_region; - iorange_init(&mrio->iorange, &memory_region_iorange_ops, - section->offset_within_address_space, - int128_get64(section->size)); - ioport_register(&mrio->iorange); -} - -static void io_region_del(MemoryListener *listener, - MemoryRegionSection *section) -{ - isa_unassign_ioport(section->offset_within_address_space, - int128_get64(section->size)); -} - static MemoryListener core_memory_listener = { .begin = core_begin, .log_global_start = core_log_global_start, @@ -1787,12 +1767,6 @@ static MemoryListener core_memory_listener = { .priority = 1, }; -static MemoryListener io_memory_listener = { - .region_add = io_region_add, - .region_del = io_region_del, - .priority = 0, -}; - static MemoryListener tcg_memory_listener = { .commit = tcg_commit, }; @@ -1834,7 +1808,6 @@ static void memory_map_init(void) address_space_init(&address_space_io, system_io, "I/O"); memory_listener_register(&core_memory_listener, &address_space_memory); - memory_listener_register(&io_memory_listener, &address_space_io); memory_listener_register(&tcg_memory_listener, &address_space_memory); } diff --git a/include/exec/ioport.h b/include/exec/ioport.h index eb99ffe..b476857 100644 --- a/include/exec/ioport.h +++ b/include/exec/ioport.h @@ -56,7 +56,6 @@ typedef struct PortioList { struct MemoryRegion *address_space; unsigned nr; struct MemoryRegion **regions; - struct MemoryRegion **aliases; void *opaque; const char *name; } PortioList; diff --git a/include/exec/memory-internal.h b/include/exec/memory-internal.h index 26689fe..d0e0633 100644 --- a/include/exec/memory-internal.h +++ b/include/exec/memory-internal.h @@ -119,8 +119,6 @@ static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start, void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end, int dirty_flags); -extern const IORangeOps memory_region_iorange_ops; - #endif #endif diff --git a/include/exec/memory.h b/include/exec/memory.h index 3598c4f..7c1e6da 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -124,10 +124,6 @@ struct MemoryRegionOps { bool unaligned; } impl; - /* If .read and .write are not present, old_portio may be used for - * backwards compatibility with old portio registration - */ - const MemoryRegionPortio *old_portio; /* If .read and .write are not present, old_mmio may be used for * backwards compatibility with old mmio registration */ @@ -183,6 +179,7 @@ struct MemoryRegionPortio { unsigned size; IOPortReadFunc *read; IOPortWriteFunc *write; + uint32_t base; /* private field */ }; #define PORTIO_END_OF_LIST() { } diff --git a/ioport.c b/ioport.c index 56470c5..e34f6b2 100644 --- a/ioport.c +++ b/ioport.c @@ -28,6 +28,7 @@ #include "exec/ioport.h" #include "trace.h" #include "exec/memory.h" +#include "exec/address-spaces.h" /***********************************************************/ /* IO Port */ @@ -47,6 +48,12 @@ # define LOG_IOPORT(...) do { } while (0) #endif +typedef struct MemoryRegionPortioList { + MemoryRegion mr; + void *portio_opaque; + MemoryRegionPortio ports[]; +} MemoryRegionPortioList; + /* XXX: use a two level table to limit memory usage */ static void *ioport_opaque[MAX_IOPORTS]; @@ -279,27 +286,34 @@ void cpu_outb(pio_addr_t addr, uint8_t val) { LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); trace_cpu_out(addr, val); - ioport_write(0, addr, val); + address_space_write(&address_space_io, addr, &val, 1); } void cpu_outw(pio_addr_t addr, uint16_t val) { + uint8_t buf[2]; + LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); trace_cpu_out(addr, val); - ioport_write(1, addr, val); + stw_p(buf, val); + address_space_write(&address_space_io, addr, buf, 2); } void cpu_outl(pio_addr_t addr, uint32_t val) { + uint8_t buf[4]; + LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); trace_cpu_out(addr, val); - ioport_write(2, addr, val); + stl_p(buf, val); + address_space_write(&address_space_io, addr, buf, 4); } uint8_t cpu_inb(pio_addr_t addr) { uint8_t val; - val = ioport_read(0, addr); + + address_space_read(&address_space_io, addr, &val, 1); trace_cpu_in(addr, val); LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); return val; @@ -307,8 +321,11 @@ uint8_t cpu_inb(pio_addr_t addr) uint16_t cpu_inw(pio_addr_t addr) { + uint8_t buf[2]; uint16_t val; - val = ioport_read(1, addr); + + address_space_read(&address_space_io, addr, buf, 2); + val = lduw_p(buf); trace_cpu_in(addr, val); LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); return val; @@ -316,8 +333,11 @@ uint16_t cpu_inw(pio_addr_t addr) uint32_t cpu_inl(pio_addr_t addr) { + uint8_t buf[4]; uint32_t val; - val = ioport_read(2, addr); + + address_space_read(&address_space_io, addr, buf, 4); + val = ldl_p(buf); trace_cpu_in(addr, val); LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); return val; @@ -336,7 +356,6 @@ void portio_list_init(PortioList *piolist, piolist->ports = callbacks; piolist->nr = 0; piolist->regions = g_new0(MemoryRegion *, n); - piolist->aliases = g_new0(MemoryRegion *, n); piolist->address_space = NULL; piolist->opaque = opaque; piolist->name = name; @@ -345,46 +364,95 @@ void portio_list_init(PortioList *piolist, void portio_list_destroy(PortioList *piolist) { g_free(piolist->regions); - g_free(piolist->aliases); } +static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio, + uint64_t offset, unsigned size, + bool write) +{ + const MemoryRegionPortio *mrp; + + for (mrp = mrpio->ports; mrp->size; ++mrp) { + if (offset >= mrp->offset && offset < mrp->offset + mrp->len && + size == mrp->size && + (write ? (bool)mrp->write : (bool)mrp->read)) { + return mrp; + } + } + return NULL; +} + +static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size) +{ + MemoryRegionPortioList *mrpio = opaque; + const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false); + uint64_t data; + + data = ((uint64_t)1 << (size * 8)) - 1; + if (mrp) { + data = mrp->read(mrpio->portio_opaque, mrp->base + addr); + } else if (size == 2) { + mrp = find_portio(mrpio, addr, 1, false); + assert(mrp); + data = mrp->read(mrpio->portio_opaque, mrp->base + addr) | + (mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8); + } + return data; +} + +static void portio_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + MemoryRegionPortioList *mrpio = opaque; + const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true); + + if (mrp) { + mrp->write(mrpio->portio_opaque, mrp->base + addr, data); + } else if (size == 2) { + mrp = find_portio(mrpio, addr, 1, true); + assert(mrp); + mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff); + mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8); + } +} + +static const MemoryRegionOps portio_ops = { + .read = portio_read, + .write = portio_write, + .valid.unaligned = true, + .impl.unaligned = true, +}; + static void portio_list_add_1(PortioList *piolist, const MemoryRegionPortio *pio_init, unsigned count, unsigned start, unsigned off_low, unsigned off_high) { - MemoryRegionPortio *pio; - MemoryRegionOps *ops; - MemoryRegion *region, *alias; + MemoryRegionPortioList *mrpio; unsigned i; /* Copy the sub-list and null-terminate it. */ - pio = g_new(MemoryRegionPortio, count + 1); - memcpy(pio, pio_init, sizeof(MemoryRegionPortio) * count); - memset(pio + count, 0, sizeof(MemoryRegionPortio)); + mrpio = g_malloc0(sizeof(MemoryRegionPortioList) + + sizeof(MemoryRegionPortio) * (count + 1)); + mrpio->portio_opaque = piolist->opaque; + memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count); + memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio)); /* Adjust the offsets to all be zero-based for the region. */ for (i = 0; i < count; ++i) { - pio[i].offset -= off_low; + mrpio->ports[i].offset -= off_low; + mrpio->ports[i].base = start + off_low; } - ops = g_new0(MemoryRegionOps, 1); - ops->old_portio = pio; - - region = g_new(MemoryRegion, 1); - alias = g_new(MemoryRegion, 1); /* * Use an alias so that the callback is called with an absolute address, * rather than an offset relative to to start + off_low. */ - memory_region_init_io(region, ops, piolist->opaque, piolist->name, - INT64_MAX); - memory_region_init_alias(alias, piolist->name, - region, start + off_low, off_high - off_low); + memory_region_init_io(&mrpio->mr, &portio_ops, mrpio, piolist->name, + off_high - off_low); memory_region_add_subregion(piolist->address_space, - start + off_low, alias); - piolist->regions[piolist->nr] = region; - piolist->aliases[piolist->nr] = alias; + start + off_low, &mrpio->mr); + piolist->regions[piolist->nr] = &mrpio->mr; ++piolist->nr; } @@ -427,19 +495,14 @@ void portio_list_add(PortioList *piolist, void portio_list_del(PortioList *piolist) { - MemoryRegion *mr, *alias; + MemoryRegionPortioList *mrpio; unsigned i; for (i = 0; i < piolist->nr; ++i) { - mr = piolist->regions[i]; - alias = piolist->aliases[i]; - memory_region_del_subregion(piolist->address_space, alias); - memory_region_destroy(alias); - memory_region_destroy(mr); - g_free((MemoryRegionOps *)mr->ops); - g_free(mr); - g_free(alias); + mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); + memory_region_del_subregion(piolist->address_space, &mrpio->mr); + memory_region_destroy(&mrpio->mr); + g_free(mrpio); piolist->regions[i] = NULL; - piolist->aliases[i] = NULL; } } diff --git a/memory.c b/memory.c index 47b005a..df07b24 100644 --- a/memory.c +++ b/memory.c @@ -401,94 +401,6 @@ static void access_with_adjusted_size(hwaddr addr, } } -static const MemoryRegionPortio *find_portio(MemoryRegion *mr, uint64_t offset, - unsigned width, bool write) -{ - const MemoryRegionPortio *mrp; - - for (mrp = mr->ops->old_portio; mrp->size; ++mrp) { - if (offset >= mrp->offset && offset < mrp->offset + mrp->len - && width == mrp->size - && (write ? (bool)mrp->write : (bool)mrp->read)) { - return mrp; - } - } - return NULL; -} - -static void memory_region_iorange_read(IORange *iorange, - uint64_t offset, - unsigned width, - uint64_t *data) -{ - MemoryRegionIORange *mrio - = container_of(iorange, MemoryRegionIORange, iorange); - MemoryRegion *mr = mrio->mr; - - offset += mrio->offset; - if (mr->ops->old_portio) { - const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset, - width, false); - - *data = ((uint64_t)1 << (width * 8)) - 1; - if (mrp) { - *data = mrp->read(mr->opaque, offset); - } else if (width == 2) { - mrp = find_portio(mr, offset - mrio->offset, 1, false); - assert(mrp); - *data = mrp->read(mr->opaque, offset) | - (mrp->read(mr->opaque, offset + 1) << 8); - } - return; - } - *data = 0; - access_with_adjusted_size(offset, data, width, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_read_accessor, mr); -} - -static void memory_region_iorange_write(IORange *iorange, - uint64_t offset, - unsigned width, - uint64_t data) -{ - MemoryRegionIORange *mrio - = container_of(iorange, MemoryRegionIORange, iorange); - MemoryRegion *mr = mrio->mr; - - offset += mrio->offset; - if (mr->ops->old_portio) { - const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset, - width, true); - - if (mrp) { - mrp->write(mr->opaque, offset, data); - } else if (width == 2) { - mrp = find_portio(mr, offset - mrio->offset, 1, true); - assert(mrp); - mrp->write(mr->opaque, offset, data & 0xff); - mrp->write(mr->opaque, offset + 1, data >> 8); - } - return; - } - access_with_adjusted_size(offset, &data, width, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_write_accessor, mr); -} - -static void memory_region_iorange_destructor(IORange *iorange) -{ - g_free(container_of(iorange, MemoryRegionIORange, iorange)); -} - -const IORangeOps memory_region_iorange_ops = { - .read = memory_region_iorange_read, - .write = memory_region_iorange_write, - .destructor = memory_region_iorange_destructor, -}; - static AddressSpace *memory_region_to_address_space(MemoryRegion *mr) { AddressSpace *as;