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-rw-r--r--arch/x86/xen/enlighten.c78
-rw-r--r--arch/x86/xen/setup.c6
-rw-r--r--drivers/xen/balloon.c65
-rw-r--r--include/xen/balloon.h5
4 files changed, 13 insertions, 141 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 67b2f31a1265..aa1cc483bd2a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -10,7 +10,6 @@
#include <xen/xen.h>
#include <xen/features.h>
#include <xen/page.h>
-#include <xen/interface/memory.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
@@ -346,80 +345,3 @@ void xen_arch_unregister_cpu(int num)
}
EXPORT_SYMBOL(xen_arch_unregister_cpu);
#endif
-
-#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
-void __init arch_xen_balloon_init(struct resource *hostmem_resource)
-{
- struct xen_memory_map memmap;
- int rc;
- unsigned int i, last_guest_ram;
- phys_addr_t max_addr = PFN_PHYS(max_pfn);
- struct e820_table *xen_e820_table;
- const struct e820_entry *entry;
- struct resource *res;
-
- if (!xen_initial_domain())
- return;
-
- xen_e820_table = kmalloc(sizeof(*xen_e820_table), GFP_KERNEL);
- if (!xen_e820_table)
- return;
-
- memmap.nr_entries = ARRAY_SIZE(xen_e820_table->entries);
- set_xen_guest_handle(memmap.buffer, xen_e820_table->entries);
- rc = HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap);
- if (rc) {
- pr_warn("%s: Can't read host e820 (%d)\n", __func__, rc);
- goto out;
- }
-
- last_guest_ram = 0;
- for (i = 0; i < memmap.nr_entries; i++) {
- if (xen_e820_table->entries[i].addr >= max_addr)
- break;
- if (xen_e820_table->entries[i].type == E820_TYPE_RAM)
- last_guest_ram = i;
- }
-
- entry = &xen_e820_table->entries[last_guest_ram];
- if (max_addr >= entry->addr + entry->size)
- goto out; /* No unallocated host RAM. */
-
- hostmem_resource->start = max_addr;
- hostmem_resource->end = entry->addr + entry->size;
-
- /*
- * Mark non-RAM regions between the end of dom0 RAM and end of host RAM
- * as unavailable. The rest of that region can be used for hotplug-based
- * ballooning.
- */
- for (; i < memmap.nr_entries; i++) {
- entry = &xen_e820_table->entries[i];
-
- if (entry->type == E820_TYPE_RAM)
- continue;
-
- if (entry->addr >= hostmem_resource->end)
- break;
-
- res = kzalloc(sizeof(*res), GFP_KERNEL);
- if (!res)
- goto out;
-
- res->name = "Unavailable host RAM";
- res->start = entry->addr;
- res->end = (entry->addr + entry->size < hostmem_resource->end) ?
- entry->addr + entry->size : hostmem_resource->end;
- rc = insert_resource(hostmem_resource, res);
- if (rc) {
- pr_warn("%s: Can't insert [%llx - %llx) (%d)\n",
- __func__, res->start, res->end, rc);
- kfree(res);
- goto out;
- }
- }
-
- out:
- kfree(xen_e820_table);
-}
-#endif /* CONFIG_XEN_BALLOON_MEMORY_HOTPLUG */
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 1163e33121fb..075ed47993bb 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -808,6 +808,7 @@ char * __init xen_memory_setup(void)
addr = xen_e820_table.entries[0].addr;
size = xen_e820_table.entries[0].size;
while (i < xen_e820_table.nr_entries) {
+ bool discard = false;
chunk_size = size;
type = xen_e820_table.entries[i].type;
@@ -823,10 +824,11 @@ char * __init xen_memory_setup(void)
xen_add_extra_mem(pfn_s, n_pfns);
xen_max_p2m_pfn = pfn_s + n_pfns;
} else
- type = E820_TYPE_UNUSABLE;
+ discard = true;
}
- xen_align_and_add_e820_region(addr, chunk_size, type);
+ if (!discard)
+ xen_align_and_add_e820_region(addr, chunk_size, type);
addr += chunk_size;
size -= chunk_size;
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index e12bb256036f..7ab6caef599c 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -251,25 +251,10 @@ static void release_memory_resource(struct resource *resource)
kfree(resource);
}
-/*
- * Host memory not allocated to dom0. We can use this range for hotplug-based
- * ballooning.
- *
- * It's a type-less resource. Setting IORESOURCE_MEM will make resource
- * management algorithms (arch_remove_reservations()) look into guest e820,
- * which we don't want.
- */
-static struct resource hostmem_resource = {
- .name = "Host RAM",
-};
-
-void __attribute__((weak)) __init arch_xen_balloon_init(struct resource *res)
-{}
-
static struct resource *additional_memory_resource(phys_addr_t size)
{
- struct resource *res, *res_hostmem;
- int ret = -ENOMEM;
+ struct resource *res;
+ int ret;
res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res)
@@ -278,42 +263,13 @@ static struct resource *additional_memory_resource(phys_addr_t size)
res->name = "System RAM";
res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
- res_hostmem = kzalloc(sizeof(*res), GFP_KERNEL);
- if (res_hostmem) {
- /* Try to grab a range from hostmem */
- res_hostmem->name = "Host memory";
- ret = allocate_resource(&hostmem_resource, res_hostmem,
- size, 0, -1,
- PAGES_PER_SECTION * PAGE_SIZE, NULL, NULL);
- }
-
- if (!ret) {
- /*
- * Insert this resource into iomem. Because hostmem_resource
- * tracks portion of guest e820 marked as UNUSABLE noone else
- * should try to use it.
- */
- res->start = res_hostmem->start;
- res->end = res_hostmem->end;
- ret = insert_resource(&iomem_resource, res);
- if (ret < 0) {
- pr_err("Can't insert iomem_resource [%llx - %llx]\n",
- res->start, res->end);
- release_memory_resource(res_hostmem);
- res_hostmem = NULL;
- res->start = res->end = 0;
- }
- }
-
- if (ret) {
- ret = allocate_resource(&iomem_resource, res,
- size, 0, -1,
- PAGES_PER_SECTION * PAGE_SIZE, NULL, NULL);
- if (ret < 0) {
- pr_err("Cannot allocate new System RAM resource\n");
- kfree(res);
- return NULL;
- }
+ ret = allocate_resource(&iomem_resource, res,
+ size, 0, -1,
+ PAGES_PER_SECTION * PAGE_SIZE, NULL, NULL);
+ if (ret < 0) {
+ pr_err("Cannot allocate new System RAM resource\n");
+ kfree(res);
+ return NULL;
}
#ifdef CONFIG_SPARSEMEM
@@ -325,7 +281,6 @@ static struct resource *additional_memory_resource(phys_addr_t size)
pr_err("New System RAM resource outside addressable RAM (%lu > %lu)\n",
pfn, limit);
release_memory_resource(res);
- release_memory_resource(res_hostmem);
return NULL;
}
}
@@ -747,8 +702,6 @@ static int __init balloon_init(void)
set_online_page_callback(&xen_online_page);
register_memory_notifier(&xen_memory_nb);
register_sysctl_table(xen_root);
-
- arch_xen_balloon_init(&hostmem_resource);
#endif
#ifdef CONFIG_XEN_PV
diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index 61f410fd74e4..4914b93a23f2 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -44,8 +44,3 @@ static inline void xen_balloon_init(void)
{
}
#endif
-
-#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
-struct resource;
-void arch_xen_balloon_init(struct resource *hostmem_resource);
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 11:46:44 +0100