ioport: Switch dispatching to memory core layer
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 <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jan Kiszka
Paolo Bonzini
parent
962b03fcf5
commit
b40acf99be
27
exec.c
27
exec.c
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@ -1752,26 +1752,6 @@ static void core_log_global_stop(MemoryListener *listener)
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cpu_physical_memory_set_dirty_tracking(0);
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}
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static void io_region_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1);
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mrio->mr = section->mr;
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mrio->offset = section->offset_within_region;
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iorange_init(&mrio->iorange, &memory_region_iorange_ops,
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section->offset_within_address_space,
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int128_get64(section->size));
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ioport_register(&mrio->iorange);
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}
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static void io_region_del(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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isa_unassign_ioport(section->offset_within_address_space,
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int128_get64(section->size));
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}
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static MemoryListener core_memory_listener = {
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.begin = core_begin,
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.log_global_start = core_log_global_start,
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@ -1779,12 +1759,6 @@ static MemoryListener core_memory_listener = {
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.priority = 1,
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};
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static MemoryListener io_memory_listener = {
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.region_add = io_region_add,
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.region_del = io_region_del,
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.priority = 0,
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};
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static MemoryListener tcg_memory_listener = {
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.commit = tcg_commit,
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};
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@ -1826,7 +1800,6 @@ static void memory_map_init(void)
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address_space_init(&address_space_io, system_io, "I/O");
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memory_listener_register(&core_memory_listener, &address_space_memory);
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memory_listener_register(&io_memory_listener, &address_space_io);
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memory_listener_register(&tcg_memory_listener, &address_space_memory);
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}
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@ -56,7 +56,6 @@ typedef struct PortioList {
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struct MemoryRegion *address_space;
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unsigned nr;
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struct MemoryRegion **regions;
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struct MemoryRegion **aliases;
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void *opaque;
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const char *name;
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} PortioList;
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@ -119,8 +119,6 @@ static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
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void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
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int dirty_flags);
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extern const IORangeOps memory_region_iorange_ops;
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#endif
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#endif
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@ -126,10 +126,6 @@ struct MemoryRegionOps {
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bool unaligned;
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} impl;
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/* If .read and .write are not present, old_portio may be used for
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* backwards compatibility with old portio registration
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*/
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const MemoryRegionPortio *old_portio;
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/* If .read and .write are not present, old_mmio may be used for
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* backwards compatibility with old mmio registration
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*/
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@ -185,6 +181,7 @@ struct MemoryRegionPortio {
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unsigned size;
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IOPortReadFunc *read;
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IOPortWriteFunc *write;
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uint32_t base; /* private field */
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};
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#define PORTIO_END_OF_LIST() { }
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138
ioport.c
138
ioport.c
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@ -28,6 +28,7 @@
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#include "exec/ioport.h"
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#include "trace.h"
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#include "exec/memory.h"
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#include "exec/address-spaces.h"
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/***********************************************************/
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/* IO Port */
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@ -47,6 +48,12 @@
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# define LOG_IOPORT(...) do { } while (0)
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#endif
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typedef struct MemoryRegionPortioList {
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MemoryRegion mr;
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void *portio_opaque;
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MemoryRegionPortio ports[];
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} MemoryRegionPortioList;
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/* XXX: use a two level table to limit memory usage */
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static void *ioport_opaque[MAX_IOPORTS];
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@ -279,27 +286,34 @@ void cpu_outb(pio_addr_t addr, uint8_t val)
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{
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LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
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trace_cpu_out(addr, val);
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ioport_write(0, addr, val);
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address_space_write(&address_space_io, addr, &val, 1);
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}
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void cpu_outw(pio_addr_t addr, uint16_t val)
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{
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uint8_t buf[2];
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LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
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trace_cpu_out(addr, val);
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ioport_write(1, addr, val);
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stw_p(buf, val);
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address_space_write(&address_space_io, addr, buf, 2);
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}
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void cpu_outl(pio_addr_t addr, uint32_t val)
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{
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uint8_t buf[4];
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LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
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trace_cpu_out(addr, val);
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ioport_write(2, addr, val);
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stl_p(buf, val);
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address_space_write(&address_space_io, addr, buf, 4);
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}
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uint8_t cpu_inb(pio_addr_t addr)
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{
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uint8_t val;
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val = ioport_read(0, addr);
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address_space_read(&address_space_io, addr, &val, 1);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
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return val;
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@ -307,8 +321,11 @@ uint8_t cpu_inb(pio_addr_t addr)
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uint16_t cpu_inw(pio_addr_t addr)
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{
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uint8_t buf[2];
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uint16_t val;
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val = ioport_read(1, addr);
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address_space_read(&address_space_io, addr, buf, 2);
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val = lduw_p(buf);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
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return val;
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@ -316,8 +333,11 @@ uint16_t cpu_inw(pio_addr_t addr)
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uint32_t cpu_inl(pio_addr_t addr)
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{
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uint8_t buf[4];
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uint32_t val;
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val = ioport_read(2, addr);
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address_space_read(&address_space_io, addr, buf, 4);
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val = ldl_p(buf);
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trace_cpu_in(addr, val);
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LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
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return val;
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@ -336,7 +356,6 @@ void portio_list_init(PortioList *piolist,
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piolist->ports = callbacks;
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piolist->nr = 0;
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piolist->regions = g_new0(MemoryRegion *, n);
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piolist->aliases = g_new0(MemoryRegion *, n);
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piolist->address_space = NULL;
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piolist->opaque = opaque;
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piolist->name = name;
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@ -345,46 +364,96 @@ void portio_list_init(PortioList *piolist,
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void portio_list_destroy(PortioList *piolist)
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{
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g_free(piolist->regions);
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g_free(piolist->aliases);
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}
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static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio,
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uint64_t offset, unsigned size,
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bool write)
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{
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const MemoryRegionPortio *mrp;
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for (mrp = mrpio->ports; mrp->size; ++mrp) {
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if (offset >= mrp->offset && offset < mrp->offset + mrp->len &&
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size == mrp->size &&
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(write ? (bool)mrp->write : (bool)mrp->read)) {
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return mrp;
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}
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}
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return NULL;
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}
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static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size)
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{
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MemoryRegionPortioList *mrpio = opaque;
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const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false);
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uint64_t data;
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data = ((uint64_t)1 << (size * 8)) - 1;
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if (mrp) {
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data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
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} else if (size == 2) {
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mrp = find_portio(mrpio, addr, 1, false);
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assert(mrp);
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data = mrp->read(mrpio->portio_opaque, mrp->base + addr) |
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(mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8);
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}
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return data;
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}
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static void portio_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned size)
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{
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MemoryRegionPortioList *mrpio = opaque;
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const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
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if (mrp) {
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mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
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} else if (size == 2) {
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mrp = find_portio(mrpio, addr, 1, true);
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assert(mrp);
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mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
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mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
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}
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}
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static const MemoryRegionOps portio_ops = {
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.read = portio_read,
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.write = portio_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.valid.unaligned = true,
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.impl.unaligned = true,
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};
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static void portio_list_add_1(PortioList *piolist,
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const MemoryRegionPortio *pio_init,
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unsigned count, unsigned start,
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unsigned off_low, unsigned off_high)
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{
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MemoryRegionPortio *pio;
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MemoryRegionOps *ops;
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MemoryRegion *region, *alias;
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MemoryRegionPortioList *mrpio;
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unsigned i;
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/* Copy the sub-list and null-terminate it. */
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pio = g_new(MemoryRegionPortio, count + 1);
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memcpy(pio, pio_init, sizeof(MemoryRegionPortio) * count);
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memset(pio + count, 0, sizeof(MemoryRegionPortio));
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mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
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sizeof(MemoryRegionPortio) * (count + 1));
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mrpio->portio_opaque = piolist->opaque;
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memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
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memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
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/* Adjust the offsets to all be zero-based for the region. */
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for (i = 0; i < count; ++i) {
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pio[i].offset -= off_low;
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mrpio->ports[i].offset -= off_low;
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mrpio->ports[i].base = start + off_low;
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}
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ops = g_new0(MemoryRegionOps, 1);
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ops->old_portio = pio;
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region = g_new(MemoryRegion, 1);
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alias = g_new(MemoryRegion, 1);
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/*
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* Use an alias so that the callback is called with an absolute address,
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* rather than an offset relative to to start + off_low.
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*/
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memory_region_init_io(region, ops, piolist->opaque, piolist->name,
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INT64_MAX);
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memory_region_init_alias(alias, piolist->name,
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region, start + off_low, off_high - off_low);
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memory_region_init_io(&mrpio->mr, &portio_ops, mrpio, piolist->name,
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off_high - off_low);
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memory_region_add_subregion(piolist->address_space,
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start + off_low, alias);
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piolist->regions[piolist->nr] = region;
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piolist->aliases[piolist->nr] = alias;
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start + off_low, &mrpio->mr);
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piolist->regions[piolist->nr] = &mrpio->mr;
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++piolist->nr;
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}
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@ -427,19 +496,14 @@ void portio_list_add(PortioList *piolist,
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void portio_list_del(PortioList *piolist)
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{
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MemoryRegion *mr, *alias;
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MemoryRegionPortioList *mrpio;
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unsigned i;
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for (i = 0; i < piolist->nr; ++i) {
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mr = piolist->regions[i];
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alias = piolist->aliases[i];
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memory_region_del_subregion(piolist->address_space, alias);
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memory_region_destroy(alias);
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memory_region_destroy(mr);
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g_free((MemoryRegionOps *)mr->ops);
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g_free(mr);
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g_free(alias);
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mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
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memory_region_del_subregion(piolist->address_space, &mrpio->mr);
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memory_region_destroy(&mrpio->mr);
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g_free(mrpio);
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piolist->regions[i] = NULL;
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piolist->aliases[i] = NULL;
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}
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}
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88
memory.c
88
memory.c
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@ -401,94 +401,6 @@ static void access_with_adjusted_size(hwaddr addr,
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}
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}
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static const MemoryRegionPortio *find_portio(MemoryRegion *mr, uint64_t offset,
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unsigned width, bool write)
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{
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const MemoryRegionPortio *mrp;
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for (mrp = mr->ops->old_portio; mrp->size; ++mrp) {
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if (offset >= mrp->offset && offset < mrp->offset + mrp->len
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&& width == mrp->size
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&& (write ? (bool)mrp->write : (bool)mrp->read)) {
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return mrp;
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}
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}
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return NULL;
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}
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static void memory_region_iorange_read(IORange *iorange,
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uint64_t offset,
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unsigned width,
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uint64_t *data)
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{
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MemoryRegionIORange *mrio
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= container_of(iorange, MemoryRegionIORange, iorange);
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MemoryRegion *mr = mrio->mr;
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offset += mrio->offset;
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if (mr->ops->old_portio) {
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const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
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width, false);
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*data = ((uint64_t)1 << (width * 8)) - 1;
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if (mrp) {
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*data = mrp->read(mr->opaque, offset);
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} else if (width == 2) {
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mrp = find_portio(mr, offset - mrio->offset, 1, false);
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assert(mrp);
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*data = mrp->read(mr->opaque, offset) |
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(mrp->read(mr->opaque, offset + 1) << 8);
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}
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return;
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}
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*data = 0;
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access_with_adjusted_size(offset, data, width,
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mr->ops->impl.min_access_size,
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mr->ops->impl.max_access_size,
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memory_region_read_accessor, mr);
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}
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static void memory_region_iorange_write(IORange *iorange,
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uint64_t offset,
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unsigned width,
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uint64_t data)
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{
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MemoryRegionIORange *mrio
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= container_of(iorange, MemoryRegionIORange, iorange);
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MemoryRegion *mr = mrio->mr;
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offset += mrio->offset;
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if (mr->ops->old_portio) {
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const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
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width, true);
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if (mrp) {
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mrp->write(mr->opaque, offset, data);
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} else if (width == 2) {
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mrp = find_portio(mr, offset - mrio->offset, 1, true);
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assert(mrp);
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mrp->write(mr->opaque, offset, data & 0xff);
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mrp->write(mr->opaque, offset + 1, data >> 8);
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}
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return;
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}
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access_with_adjusted_size(offset, &data, width,
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mr->ops->impl.min_access_size,
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mr->ops->impl.max_access_size,
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memory_region_write_accessor, mr);
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}
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static void memory_region_iorange_destructor(IORange *iorange)
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{
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g_free(container_of(iorange, MemoryRegionIORange, iorange));
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}
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const IORangeOps memory_region_iorange_ops = {
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.read = memory_region_iorange_read,
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.write = memory_region_iorange_write,
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.destructor = memory_region_iorange_destructor,
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};
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static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
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{
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AddressSpace *as;
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