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authorLinus Torvalds <torvalds@linux-foundation.org>2018-12-02 20:15:55 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-02 20:15:55 (GMT)
commit292974c5acae330186cbf5a833385f666aeb12c0 (patch)
tree503003e9b7034449ac29b4f6705d7f251b14cad0 /drivers/xen
parenta234c7371fd8a71faa000745ce6ffee05e1dc07a (diff)
parent975ef94a0284648fb0137bd5e949b18cef604e33 (diff)
Merge tag 'for-linus-4.20a-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross: - A revert of a previous commit as it is no longer necessary and has shown to cause problems in some memory hotplug cases. - Some small fixes and a minor cleanup. - A patch for adding better diagnostic data in a very rare failure case. * tag 'for-linus-4.20a-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: pvcalls-front: fixes incorrect error handling Revert "xen/balloon: Mark unallocated host memory as UNUSABLE" xen: xlate_mmu: add missing header to fix 'W=1' warning xen/x86: add diagnostic printout to xen_mc_flush() in case of error x86/xen: cleanup includes in arch/x86/xen/spinlock.c
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/balloon.c65
-rw-r--r--drivers/xen/pvcalls-front.c4
-rw-r--r--drivers/xen/xlate_mmu.c1
3 files changed, 12 insertions, 58 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index fdfc64f..221b733 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;
}
}
@@ -750,8 +705,6 @@ 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/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 2f11ca7..77224d8 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -385,8 +385,8 @@ static int create_active(struct sock_mapping *map, int *evtchn)
out_error:
if (*evtchn >= 0)
xenbus_free_evtchn(pvcalls_front_dev, *evtchn);
- kfree(map->active.data.in);
- kfree(map->active.ring);
+ free_pages((unsigned long)map->active.data.in, PVCALLS_RING_ORDER);
+ free_page((unsigned long)map->active.ring);
return ret;
}
diff --git a/drivers/xen/xlate_mmu.c b/drivers/xen/xlate_mmu.c
index 23f1387..e7df65d 100644
--- a/drivers/xen/xlate_mmu.c
+++ b/drivers/xen/xlate_mmu.c
@@ -36,6 +36,7 @@
#include <asm/xen/hypervisor.h>
#include <xen/xen.h>
+#include <xen/xen-ops.h>
#include <xen/page.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>

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