Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* device_del fix (Julia)
* FXAM fix (myself)
* memdev refactoring (Igor)
* memory region API cleanups (Peter, Philippe)
* ioeventfd optimization (Stefan)
* new WHPX maintainer (Sunil)
* Large guest startup optimizations (Chen)

# gpg: Signature made Tue 25 Feb 2020 12:42:24 GMT
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (104 commits)
  WHPX: Assigning maintainer for Windows Hypervisor Platform
  accel/kvm: Check ioctl(KVM_SET_USER_MEMORY_REGION) return value
  target/i386: check for empty register in FXAM
  qdev-monitor: Forbid repeated device_del
  mem-prealloc: optimize large guest startup
  memory: batch allocate ioeventfds[] in address_space_update_ioeventfds()
  Avoid cpu_physical_memory_rw() with a constant is_write argument
  Let cpu_[physical]_memory() calls pass a boolean 'is_write' argument
  exec: Let cpu_[physical]_memory API use a boolean 'is_write' argument
  Avoid address_space_rw() with a constant is_write argument
  Let address_space_rw() calls pass a boolean 'is_write' argument
  exec: Let address_space_unmap() use a boolean 'is_write' argument
  hw/virtio: Let vhost_memory_map() use a boolean 'is_write' argument
  hw/virtio: Let virtqueue_map_iovec() use a boolean 'is_write' argument
  hw/ide: Let the DMAIntFunc prototype use a boolean 'is_write' argument
  hw/ide/internal: Remove unused DMARestartFunc typedef
  Remove unnecessary cast when using the cpu_[physical]_memory API
  exec: Let the cpu_[physical]_memory API use void pointer arguments
  Remove unnecessary cast when using the address_space API
  hw/net: Avoid casting non-const pointer, use address_space_write()
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 42 insertions, 89 deletions

diff --git a/exec.c b/exec.c
index c930040f83..231d6e5641 100644
--- a/exec.c
+++ b/exec.c
@@ -1668,59 +1668,18 @@ static int find_max_backend_pagesize(Object *obj, void *opaque)
 long qemu_minrampagesize(void)
 {
     long hpsize = LONG_MAX;
-    long mainrampagesize;
-    Object *memdev_root;
-    MachineState *ms = MACHINE(qdev_get_machine());
-
-    mainrampagesize = qemu_mempath_getpagesize(mem_path);
-
-    /* it's possible we have memory-backend objects with
-     * hugepage-backed RAM. these may get mapped into system
-     * address space via -numa parameters or memory hotplug
-     * hooks. we want to take these into account, but we
-     * also want to make sure these supported hugepage
-     * sizes are applicable across the entire range of memory
-     * we may boot from, so we take the min across all
-     * backends, and assume normal pages in cases where a
-     * backend isn't backed by hugepages.
-     */
-    memdev_root = object_resolve_path("/objects", NULL);
-    if (memdev_root) {
-        object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize);
-    }
-    if (hpsize == LONG_MAX) {
-        /* No additional memory regions found ==> Report main RAM page size */
-        return mainrampagesize;
-    }
-
-    /* If NUMA is disabled or the NUMA nodes are not backed with a
-     * memory-backend, then there is at least one node using "normal" RAM,
-     * so if its page size is smaller we have got to report that size instead.
-     */
-    if (hpsize > mainrampagesize &&
-        (ms->numa_state == NULL ||
-         ms->numa_state->num_nodes == 0 ||
-         ms->numa_state->nodes[0].node_memdev == NULL)) {
-        static bool warned;
-        if (!warned) {
-            error_report("Huge page support disabled (n/a for main memory).");
-            warned = true;
-        }
-        return mainrampagesize;
-    }
+    Object *memdev_root = object_resolve_path("/objects", NULL);
 
+    object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize);
     return hpsize;
 }
 
 long qemu_maxrampagesize(void)
 {
-    long pagesize = qemu_mempath_getpagesize(mem_path);
+    long pagesize = 0;
     Object *memdev_root = object_resolve_path("/objects", NULL);
 
-    if (memdev_root) {
-        object_child_foreach(memdev_root, find_max_backend_pagesize,
-                             &pagesize);
-    }
+    object_child_foreach(memdev_root, find_max_backend_pagesize, &pagesize);
     return pagesize;
 }
 #else
@@ -1843,8 +1802,6 @@ static void *file_ram_alloc(RAMBlock *block,
                             bool truncate,
                             Error **errp)
 {
-    Error *err = NULL;
-    MachineState *ms = MACHINE(qdev_get_machine());
     void *area;
 
     block->page_size = qemu_fd_getpagesize(fd);
@@ -1900,15 +1857,6 @@ static void *file_ram_alloc(RAMBlock *block,
         return NULL;
     }
 
-    if (mem_prealloc) {
-        os_mem_prealloc(fd, area, memory, ms->smp.cpus, &err);
-        if (err) {
-            error_propagate(errp, err);
-            qemu_ram_munmap(fd, area, memory);
-            return NULL;
-        }
-    }
-
     block->fd = fd;
     return area;
 }
@@ -2356,9 +2304,9 @@ RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr,
     size = HOST_PAGE_ALIGN(size);
     file_size = get_file_size(fd);
     if (file_size > 0 && file_size < size) {
-        error_setg(errp, "backing store %s size 0x%" PRIx64
+        error_setg(errp, "backing store size 0x%" PRIx64
                    " does not match 'size' option 0x" RAM_ADDR_FMT,
-                   mem_path, file_size, size);
+                   file_size, size);
         return NULL;
     }
 
@@ -2788,9 +2736,9 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
 }
 
 static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
-                                 MemTxAttrs attrs, uint8_t *buf, hwaddr len);
+                                 MemTxAttrs attrs, void *buf, hwaddr len);
 static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
-                                  const uint8_t *buf, hwaddr len);
+                                  const void *buf, hwaddr len);
 static bool flatview_access_valid(FlatView *fv, hwaddr addr, hwaddr len,
                                   bool is_write, MemTxAttrs attrs);
 
@@ -3027,11 +2975,12 @@ MemoryRegion *get_system_io(void)
 /* physical memory access (slow version, mainly for debug) */
 #if defined(CONFIG_USER_ONLY)
 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
-                        uint8_t *buf, target_ulong len, int is_write)
+                        void *ptr, target_ulong len, bool is_write)
 {
     int flags;
     target_ulong l, page;
     void * p;
+    uint8_t *buf = ptr;
 
     while (len > 0) {
         page = addr & TARGET_PAGE_MASK;
@@ -3155,14 +3104,15 @@ static bool prepare_mmio_access(MemoryRegion *mr)
 /* Called within RCU critical section.  */
 static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
                                            MemTxAttrs attrs,
-                                           const uint8_t *buf,
+                                           const void *ptr,
                                            hwaddr len, hwaddr addr1,
                                            hwaddr l, MemoryRegion *mr)
 {
-    uint8_t *ptr;
+    uint8_t *ram_ptr;
     uint64_t val;
     MemTxResult result = MEMTX_OK;
     bool release_lock = false;
+    const uint8_t *buf = ptr;
 
     for (;;) {
         if (!memory_access_is_direct(mr, true)) {
@@ -3175,8 +3125,8 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
                                                    size_memop(l), attrs);
         } else {
             /* RAM case */
-            ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
-            memcpy(ptr, buf, l);
+            ram_ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
+            memcpy(ram_ptr, buf, l);
             invalidate_and_set_dirty(mr, addr1, l);
         }
 
@@ -3202,7 +3152,7 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
 
 /* Called from RCU critical section.  */
 static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
-                                  const uint8_t *buf, hwaddr len)
+                                  const void *buf, hwaddr len)
 {
     hwaddr l;
     hwaddr addr1;
@@ -3219,14 +3169,15 @@ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
 
 /* Called within RCU critical section.  */
 MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
-                                   MemTxAttrs attrs, uint8_t *buf,
+                                   MemTxAttrs attrs, void *ptr,
                                    hwaddr len, hwaddr addr1, hwaddr l,
                                    MemoryRegion *mr)
 {
-    uint8_t *ptr;
+    uint8_t *ram_ptr;
     uint64_t val;
     MemTxResult result = MEMTX_OK;
     bool release_lock = false;
+    uint8_t *buf = ptr;
 
     for (;;) {
         if (!memory_access_is_direct(mr, false)) {
@@ -3238,8 +3189,8 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
             stn_he_p(buf, l, val);
         } else {
             /* RAM case */
-            ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
-            memcpy(buf, ptr, l);
+            ram_ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
+            memcpy(buf, ram_ptr, l);
         }
 
         if (release_lock) {
@@ -3264,7 +3215,7 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
 
 /* Called from RCU critical section.  */
 static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
-                                 MemTxAttrs attrs, uint8_t *buf, hwaddr len)
+                                 MemTxAttrs attrs, void *buf, hwaddr len)
 {
     hwaddr l;
     hwaddr addr1;
@@ -3277,7 +3228,7 @@ static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
 }
 
 MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
-                                    MemTxAttrs attrs, uint8_t *buf, hwaddr len)
+                                    MemTxAttrs attrs, void *buf, hwaddr len)
 {
     MemTxResult result = MEMTX_OK;
     FlatView *fv;
@@ -3293,7 +3244,7 @@ MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
 
 MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
                                 MemTxAttrs attrs,
-                                const uint8_t *buf, hwaddr len)
+                                const void *buf, hwaddr len)
 {
     MemTxResult result = MEMTX_OK;
     FlatView *fv;
@@ -3308,7 +3259,7 @@ MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
 }
 
 MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
-                             uint8_t *buf, hwaddr len, bool is_write)
+                             void *buf, hwaddr len, bool is_write)
 {
     if (is_write) {
         return address_space_write(as, addr, attrs, buf, len);
@@ -3317,8 +3268,8 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
     }
 }
 
-void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
-                            hwaddr len, int is_write)
+void cpu_physical_memory_rw(hwaddr addr, void *buf,
+                            hwaddr len, bool is_write)
 {
     address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED,
                      buf, len, is_write);
@@ -3332,14 +3283,15 @@ enum write_rom_type {
 static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
                                                            hwaddr addr,
                                                            MemTxAttrs attrs,
-                                                           const uint8_t *buf,
+                                                           const void *ptr,
                                                            hwaddr len,
                                                            enum write_rom_type type)
 {
     hwaddr l;
-    uint8_t *ptr;
+    uint8_t *ram_ptr;
     hwaddr addr1;
     MemoryRegion *mr;
+    const uint8_t *buf = ptr;
 
     RCU_READ_LOCK_GUARD();
     while (len > 0) {
@@ -3351,14 +3303,14 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
             l = memory_access_size(mr, l, addr1);
         } else {
             /* ROM/RAM case */
-            ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
+            ram_ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
             switch (type) {
             case WRITE_DATA:
-                memcpy(ptr, buf, l);
+                memcpy(ram_ptr, buf, l);
                 invalidate_and_set_dirty(mr, addr1, l);
                 break;
             case FLUSH_CACHE:
-                flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l);
+                flush_icache_range((uintptr_t)ram_ptr, (uintptr_t)ram_ptr + l);
                 break;
             }
         }
@@ -3372,7 +3324,7 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
 /* used for ROM loading : can write in RAM and ROM */
 MemTxResult address_space_write_rom(AddressSpace *as, hwaddr addr,
                                     MemTxAttrs attrs,
-                                    const uint8_t *buf, hwaddr len)
+                                    const void *buf, hwaddr len)
 {
     return address_space_write_rom_internal(as, addr, attrs,
                                             buf, len, WRITE_DATA);
@@ -3602,11 +3554,11 @@ void *address_space_map(AddressSpace *as,
 }
 
 /* Unmaps a memory region previously mapped by address_space_map().
- * Will also mark the memory as dirty if is_write == 1.  access_len gives
+ * Will also mark the memory as dirty if is_write is true.  access_len gives
  * the amount of memory that was actually read or written by the caller.
  */
 void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
-                         int is_write, hwaddr access_len)
+                         bool is_write, hwaddr access_len)
 {
     if (buffer != bounce.buffer) {
         MemoryRegion *mr;
@@ -3636,14 +3588,14 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
 
 void *cpu_physical_memory_map(hwaddr addr,
                               hwaddr *plen,
-                              int is_write)
+                              bool is_write)
 {
     return address_space_map(&address_space_memory, addr, plen, is_write,
                              MEMTXATTRS_UNSPECIFIED);
 }
 
 void cpu_physical_memory_unmap(void *buffer, hwaddr len,
-                               int is_write, hwaddr access_len)
+                               bool is_write, hwaddr access_len)
 {
     return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len);
 }
@@ -3794,10 +3746,11 @@ address_space_write_cached_slow(MemoryRegionCache *cache, hwaddr addr,
 
 /* virtual memory access for debug (includes writing to ROM) */
 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
-                        uint8_t *buf, target_ulong len, int is_write)
+                        void *ptr, target_ulong len, bool is_write)
 {
     hwaddr phys_addr;
     target_ulong l, page;
+    uint8_t *buf = ptr;
 
     cpu_synchronize_state(cpu);
     while (len > 0) {
@@ -3818,8 +3771,8 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
             address_space_write_rom(cpu->cpu_ases[asidx].as, phys_addr,
                                     attrs, buf, l);
         } else {
-            address_space_rw(cpu->cpu_ases[asidx].as, phys_addr,
-                             attrs, buf, l, 0);
+            address_space_read(cpu->cpu_ases[asidx].as, phys_addr, attrs, buf,
+                               l);
         }
         len -= l;
         buf += l;