From 50c1e1491e1981ecba14a477897681d8d0602500 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 8 Feb 2012 21:36:02 +0200 Subject: [PATCH] memory: support stateless memory listeners Current memory listeners are incremental; that is, they are expected to maintain their own state, and receive callbacks for changes to that state. This patch adds support for stateless listeners; these work by receiving a ->begin() callback (which tells them that new state is coming), a sequence of ->region_add() and ->region_nop() callbacks, and then a ->commit() callback which signifies the end of the new state. They should ignore ->region_del() callbacks. Signed-off-by: Avi Kivity --- exec.c | 32 ++++++++++++++++++++++++++++++++ hw/vhost.c | 16 ++++++++++++++++ kvm-all.c | 16 ++++++++++++++++ memory.c | 5 +++++ memory.h | 3 +++ xen-all.c | 16 ++++++++++++++++ 6 files changed, 88 insertions(+) diff --git a/exec.c b/exec.c index 16973a675f..6726afd347 100644 --- a/exec.c +++ b/exec.c @@ -3488,6 +3488,14 @@ static void io_mem_init(void) "watch", UINT64_MAX); } +static void core_begin(MemoryListener *listener) +{ +} + +static void core_commit(MemoryListener *listener) +{ +} + static void core_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -3500,6 +3508,11 @@ static void core_region_del(MemoryListener *listener, cpu_register_physical_memory_log(section, false); } +static void core_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static void core_log_start(MemoryListener *listener, MemoryRegionSection *section) { @@ -3537,6 +3550,14 @@ static void core_eventfd_del(MemoryListener *listener, { } +static void io_begin(MemoryListener *listener) +{ +} + +static void io_commit(MemoryListener *listener) +{ +} + static void io_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -3551,6 +3572,11 @@ static void io_region_del(MemoryListener *listener, isa_unassign_ioport(section->offset_within_address_space, section->size); } +static void io_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static void io_log_start(MemoryListener *listener, MemoryRegionSection *section) { @@ -3587,8 +3613,11 @@ static void io_eventfd_del(MemoryListener *listener, } static MemoryListener core_memory_listener = { + .begin = core_begin, + .commit = core_commit, .region_add = core_region_add, .region_del = core_region_del, + .region_nop = core_region_nop, .log_start = core_log_start, .log_stop = core_log_stop, .log_sync = core_log_sync, @@ -3600,8 +3629,11 @@ static MemoryListener core_memory_listener = { }; static MemoryListener io_memory_listener = { + .begin = io_begin, + .commit = io_commit, .region_add = io_region_add, .region_del = io_region_del, + .region_nop = io_region_nop, .log_start = io_log_start, .log_stop = io_log_stop, .log_sync = io_log_sync, diff --git a/hw/vhost.c b/hw/vhost.c index 01f676a959..8d3ba5b608 100644 --- a/hw/vhost.c +++ b/hw/vhost.c @@ -436,6 +436,14 @@ static bool vhost_section(MemoryRegionSection *section) && memory_region_is_ram(section->mr); } +static void vhost_begin(MemoryListener *listener) +{ +} + +static void vhost_commit(MemoryListener *listener) +{ +} + static void vhost_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -476,6 +484,11 @@ static void vhost_region_del(MemoryListener *listener, } } +static void vhost_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static int vhost_virtqueue_set_addr(struct vhost_dev *dev, struct vhost_virtqueue *vq, unsigned idx, bool enable_log) @@ -756,8 +769,11 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force) hdev->features = features; hdev->memory_listener = (MemoryListener) { + .begin = vhost_begin, + .commit = vhost_commit, .region_add = vhost_region_add, .region_del = vhost_region_del, + .region_nop = vhost_region_nop, .log_start = vhost_log_start, .log_stop = vhost_log_stop, .log_sync = vhost_log_sync, diff --git a/kvm-all.c b/kvm-all.c index 15bc42fcdb..c07823df98 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -680,6 +680,14 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) } } +static void kvm_begin(MemoryListener *listener) +{ +} + +static void kvm_commit(MemoryListener *listener) +{ +} + static void kvm_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -692,6 +700,11 @@ static void kvm_region_del(MemoryListener *listener, kvm_set_phys_mem(section, false); } +static void kvm_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static void kvm_log_sync(MemoryListener *listener, MemoryRegionSection *section) { @@ -795,8 +808,11 @@ static void kvm_eventfd_del(MemoryListener *listener, } static MemoryListener kvm_memory_listener = { + .begin = kvm_begin, + .commit = kvm_commit, .region_add = kvm_region_add, .region_del = kvm_region_del, + .region_nop = kvm_region_nop, .log_start = kvm_log_start, .log_stop = kvm_log_stop, .log_sync = kvm_log_sync, diff --git a/memory.c b/memory.c index 35e1483859..6565e2e696 100644 --- a/memory.c +++ b/memory.c @@ -676,6 +676,7 @@ static void address_space_update_topology_pass(AddressSpace *as, /* In both (logging may have changed) */ if (adding) { + MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); if (frold->dirty_log_mask && !frnew->dirty_log_mask) { MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop); } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) { @@ -722,6 +723,8 @@ static void memory_region_update_topology(MemoryRegion *mr) return; } + MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); + if (address_space_memory.root) { address_space_update_topology(&address_space_memory); } @@ -729,6 +732,8 @@ static void memory_region_update_topology(MemoryRegion *mr) address_space_update_topology(&address_space_io); } + MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); + memory_region_update_pending = false; } diff --git a/memory.h b/memory.h index bc9600b402..b7bccd1968 100644 --- a/memory.h +++ b/memory.h @@ -180,8 +180,11 @@ typedef struct MemoryListener MemoryListener; * Use with memory_listener_register() and memory_listener_unregister(). */ struct MemoryListener { + void (*begin)(MemoryListener *listener); + void (*commit)(MemoryListener *listener); void (*region_add)(MemoryListener *listener, MemoryRegionSection *section); void (*region_del)(MemoryListener *listener, MemoryRegionSection *section); + void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section); void (*log_start)(MemoryListener *listener, MemoryRegionSection *section); void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section); void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section); diff --git a/xen-all.c b/xen-all.c index a58a397ca4..6a11342665 100644 --- a/xen-all.c +++ b/xen-all.c @@ -394,6 +394,14 @@ static void xen_set_memory(struct MemoryListener *listener, } } +static void xen_begin(MemoryListener *listener) +{ +} + +static void xen_commit(MemoryListener *listener) +{ +} + static void xen_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -406,6 +414,11 @@ static void xen_region_del(MemoryListener *listener, xen_set_memory(listener, section, false); } +static void xen_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static void xen_sync_dirty_bitmap(XenIOState *state, target_phys_addr_t start_addr, ram_addr_t size) @@ -500,8 +513,11 @@ static void xen_eventfd_del(MemoryListener *listener, } static MemoryListener xen_memory_listener = { + .begin = xen_begin, + .commit = xen_commit, .region_add = xen_region_add, .region_del = xen_region_del, + .region_nop = xen_region_nop, .log_start = xen_log_start, .log_stop = xen_log_stop, .log_sync = xen_log_sync, -- GitLab