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-rw-r--r--drivers/xen/Kconfig13
-rw-r--r--drivers/xen/balloon.c3
-rw-r--r--drivers/xen/events.c36
-rw-r--r--drivers/xen/privcmd.c2
-rw-r--r--drivers/xen/tmem.c98
-rw-r--r--drivers/xen/xen-acpi-processor.c82
-rw-r--r--drivers/xen/xen-pciback/pci_stub.c4
-rw-r--r--drivers/xen/xen-selfballoon.c54
-rw-r--r--drivers/xen/xenbus/xenbus_client.c5
-rw-r--r--drivers/xen/xenbus/xenbus_comms.h1
-rw-r--r--drivers/xen/xenbus/xenbus_dev_backend.c21
-rw-r--r--drivers/xen/xenbus/xenbus_probe.c27
-rw-r--r--drivers/xen/xenbus/xenbus_probe.h7
-rw-r--r--drivers/xen/xenbus/xenbus_probe_frontend.c37
14 files changed, 226 insertions, 164 deletions
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 67af155cf60..9e02d60a364 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -19,11 +19,10 @@ config XEN_SELFBALLOONING
by the current usage of anonymous memory ("committed AS") and
controlled by various sysfs-settable parameters. Configuring
FRONTSWAP is highly recommended; if it is not configured, self-
- ballooning is disabled by default but can be enabled with the
- 'selfballooning' kernel boot parameter. If FRONTSWAP is configured,
+ ballooning is disabled by default. If FRONTSWAP is configured,
frontswap-selfshrinking is enabled by default but can be disabled
- with the 'noselfshrink' kernel boot parameter; and self-ballooning
- is enabled by default but can be disabled with the 'noselfballooning'
+ with the 'tmem.selfshrink=0' kernel boot parameter; and self-ballooning
+ is enabled by default but can be disabled with the 'tmem.selfballooning=0'
kernel boot parameter. Note that systems without a sufficiently
large swap device should not enable self-ballooning.
@@ -141,13 +140,13 @@ config XEN_GRANT_DEV_ALLOC
config SWIOTLB_XEN
def_bool y
- depends on PCI
+ depends on PCI && X86
select SWIOTLB
config XEN_TMEM
- bool
+ tristate
depends on !ARM
- default y if (CLEANCACHE || FRONTSWAP)
+ default m if (CLEANCACHE || FRONTSWAP)
help
Shim to interface in-kernel Transcendent Memory hooks
(e.g. cleancache and frontswap) to Xen tmem hypercalls.
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index a56776dbe09..930fb681790 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -407,7 +407,8 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
nr_pages = ARRAY_SIZE(frame_list);
for (i = 0; i < nr_pages; i++) {
- if ((page = alloc_page(gfp)) == NULL) {
+ page = alloc_page(gfp);
+ if (page == NULL) {
nr_pages = i;
state = BP_EAGAIN;
break;
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 2647ad8e1f1..6a6bbe4ede9 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -85,8 +85,7 @@ enum xen_irq_type {
* event channel - irq->event channel mapping
* cpu - cpu this event channel is bound to
* index - type-specific information:
- * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM
- * guest, or GSI (real passthrough IRQ) of the device.
+ * PIRQ - physical IRQ, GSI, flags, and owner domain
* VIRQ - virq number
* IPI - IPI vector
* EVTCHN -
@@ -105,7 +104,6 @@ struct irq_info {
struct {
unsigned short pirq;
unsigned short gsi;
- unsigned char vector;
unsigned char flags;
uint16_t domid;
} pirq;
@@ -169,6 +167,8 @@ static void xen_irq_info_common_init(struct irq_info *info,
info->cpu = cpu;
evtchn_to_irq[evtchn] = irq;
+
+ irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
}
static void xen_irq_info_evtchn_init(unsigned irq,
@@ -211,7 +211,6 @@ static void xen_irq_info_pirq_init(unsigned irq,
unsigned short evtchn,
unsigned short pirq,
unsigned short gsi,
- unsigned short vector,
uint16_t domid,
unsigned char flags)
{
@@ -221,7 +220,6 @@ static void xen_irq_info_pirq_init(unsigned irq,
info->u.pirq.pirq = pirq;
info->u.pirq.gsi = gsi;
- info->u.pirq.vector = vector;
info->u.pirq.domid = domid;
info->u.pirq.flags = flags;
}
@@ -519,6 +517,9 @@ static void xen_free_irq(unsigned irq)
{
struct irq_info *info = irq_get_handler_data(irq);
+ if (WARN_ON(!info))
+ return;
+
list_del(&info->list);
irq_set_handler_data(irq, NULL);
@@ -714,7 +715,7 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
goto out;
}
- xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, DOMID_SELF,
+ xen_irq_info_pirq_init(irq, 0, pirq, gsi, DOMID_SELF,
shareable ? PIRQ_SHAREABLE : 0);
pirq_query_unmask(irq);
@@ -762,8 +763,7 @@ int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc)
}
int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
- int pirq, int vector, const char *name,
- domid_t domid)
+ int pirq, const char *name, domid_t domid)
{
int irq, ret;
@@ -776,7 +776,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_edge_irq,
name);
- xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, domid, 0);
+ xen_irq_info_pirq_init(irq, 0, pirq, 0, domid, 0);
ret = irq_set_msi_desc(irq, msidesc);
if (ret < 0)
goto error_irq;
@@ -876,7 +876,6 @@ int bind_evtchn_to_irq(unsigned int evtchn)
struct irq_info *info = info_for_irq(irq);
WARN_ON(info == NULL || info->type != IRQT_EVTCHN);
}
- irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
out:
mutex_unlock(&irq_mapping_update_lock);
@@ -1008,6 +1007,9 @@ static void unbind_from_irq(unsigned int irq)
int evtchn = evtchn_from_irq(irq);
struct irq_info *info = irq_get_handler_data(irq);
+ if (WARN_ON(!info))
+ return;
+
mutex_lock(&irq_mapping_update_lock);
if (info->refcnt > 0) {
@@ -1135,6 +1137,10 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
void unbind_from_irqhandler(unsigned int irq, void *dev_id)
{
+ struct irq_info *info = irq_get_handler_data(irq);
+
+ if (WARN_ON(!info))
+ return;
free_irq(irq, dev_id);
unbind_from_irq(irq);
}
@@ -1457,6 +1463,9 @@ void rebind_evtchn_irq(int evtchn, int irq)
{
struct irq_info *info = info_for_irq(irq);
+ if (WARN_ON(!info))
+ return;
+
/* Make sure the irq is masked, since the new event channel
will also be masked. */
disable_irq(irq);
@@ -1730,7 +1739,12 @@ void xen_poll_irq(int irq)
int xen_test_irq_shared(int irq)
{
struct irq_info *info = info_for_irq(irq);
- struct physdev_irq_status_query irq_status = { .irq = info->u.pirq.pirq };
+ struct physdev_irq_status_query irq_status;
+
+ if (WARN_ON(!info))
+ return -ENOENT;
+
+ irq_status.irq = info->u.pirq.pirq;
if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status))
return 0;
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index ca2b00e9d55..2cfc24d76fc 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -504,7 +504,7 @@ static void privcmd_close(struct vm_area_struct *vma)
struct page **pages = vma->vm_private_data;
int numpgs = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
- if (!xen_feature(XENFEAT_auto_translated_physmap || !numpgs || !pages))
+ if (!xen_feature(XENFEAT_auto_translated_physmap) || !numpgs || !pages)
return;
xen_unmap_domain_mfn_range(vma, numpgs, pages);
diff --git a/drivers/xen/tmem.c b/drivers/xen/tmem.c
index 3ee836d4258..0f0493c6337 100644
--- a/drivers/xen/tmem.c
+++ b/drivers/xen/tmem.c
@@ -5,16 +5,13 @@
* Author: Dan Magenheimer
*/
+#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/cleancache.h>
-
-/* temporary ifdef until include/linux/frontswap.h is upstream */
-#ifdef CONFIG_FRONTSWAP
#include <linux/frontswap.h>
-#endif
#include <xen/xen.h>
#include <xen/interface/xen.h>
@@ -23,6 +20,36 @@
#include <asm/xen/hypervisor.h>
#include <xen/tmem.h>
+#ifndef CONFIG_XEN_TMEM_MODULE
+bool __read_mostly tmem_enabled = false;
+
+static int __init enable_tmem(char *s)
+{
+ tmem_enabled = true;
+ return 1;
+}
+__setup("tmem", enable_tmem);
+#endif
+
+#ifdef CONFIG_CLEANCACHE
+static bool cleancache __read_mostly = true;
+module_param(cleancache, bool, S_IRUGO);
+static bool selfballooning __read_mostly = true;
+module_param(selfballooning, bool, S_IRUGO);
+#endif /* CONFIG_CLEANCACHE */
+
+#ifdef CONFIG_FRONTSWAP
+static bool frontswap __read_mostly = true;
+module_param(frontswap, bool, S_IRUGO);
+#else /* CONFIG_FRONTSWAP */
+#define frontswap (0)
+#endif /* CONFIG_FRONTSWAP */
+
+#ifdef CONFIG_XEN_SELFBALLOONING
+static bool selfshrinking __read_mostly = true;
+module_param(selfshrinking, bool, S_IRUGO);
+#endif /* CONFIG_XEN_SELFBALLOONING */
+
#define TMEM_CONTROL 0
#define TMEM_NEW_POOL 1
#define TMEM_DESTROY_POOL 2
@@ -128,14 +155,6 @@ static int xen_tmem_flush_object(u32 pool_id, struct tmem_oid oid)
return xen_tmem_op(TMEM_FLUSH_OBJECT, pool_id, oid, 0, 0, 0, 0, 0);
}
-bool __read_mostly tmem_enabled = false;
-
-static int __init enable_tmem(char *s)
-{
- tmem_enabled = true;
- return 1;
-}
-__setup("tmem", enable_tmem);
#ifdef CONFIG_CLEANCACHE
static int xen_tmem_destroy_pool(u32 pool_id)
@@ -227,16 +246,7 @@ static int tmem_cleancache_init_shared_fs(char *uuid, size_t pagesize)
return xen_tmem_new_pool(shared_uuid, TMEM_POOL_SHARED, pagesize);
}
-static bool __initdata use_cleancache = true;
-
-static int __init no_cleancache(char *s)
-{
- use_cleancache = false;
- return 1;
-}
-__setup("nocleancache", no_cleancache);
-
-static struct cleancache_ops __initdata tmem_cleancache_ops = {
+static struct cleancache_ops tmem_cleancache_ops = {
.put_page = tmem_cleancache_put_page,
.get_page = tmem_cleancache_get_page,
.invalidate_page = tmem_cleancache_flush_page,
@@ -353,16 +363,7 @@ static void tmem_frontswap_init(unsigned ignored)
xen_tmem_new_pool(private, TMEM_POOL_PERSIST, PAGE_SIZE);
}
-static bool __initdata use_frontswap = true;
-
-static int __init no_frontswap(char *s)
-{
- use_frontswap = false;
- return 1;
-}
-__setup("nofrontswap", no_frontswap);
-
-static struct frontswap_ops __initdata tmem_frontswap_ops = {
+static struct frontswap_ops tmem_frontswap_ops = {
.store = tmem_frontswap_store,
.load = tmem_frontswap_load,
.invalidate_page = tmem_frontswap_flush_page,
@@ -371,36 +372,53 @@ static struct frontswap_ops __initdata tmem_frontswap_ops = {
};
#endif
-static int __init xen_tmem_init(void)
+static int xen_tmem_init(void)
{
if (!xen_domain())
return 0;
#ifdef CONFIG_FRONTSWAP
- if (tmem_enabled && use_frontswap) {
+ if (tmem_enabled && frontswap) {
char *s = "";
- struct frontswap_ops old_ops =
- frontswap_register_ops(&tmem_frontswap_ops);
+ struct frontswap_ops *old_ops;
tmem_frontswap_poolid = -1;
- if (old_ops.init != NULL)
+ old_ops = frontswap_register_ops(&tmem_frontswap_ops);
+ if (IS_ERR(old_ops) || old_ops) {
+ if (IS_ERR(old_ops))
+ return PTR_ERR(old_ops);
s = " (WARNING: frontswap_ops overridden)";
+ }
printk(KERN_INFO "frontswap enabled, RAM provided by "
"Xen Transcendent Memory%s\n", s);
}
#endif
#ifdef CONFIG_CLEANCACHE
BUG_ON(sizeof(struct cleancache_filekey) != sizeof(struct tmem_oid));
- if (tmem_enabled && use_cleancache) {
+ if (tmem_enabled && cleancache) {
char *s = "";
- struct cleancache_ops old_ops =
+ struct cleancache_ops *old_ops =
cleancache_register_ops(&tmem_cleancache_ops);
- if (old_ops.init_fs != NULL)
+ if (old_ops)
s = " (WARNING: cleancache_ops overridden)";
printk(KERN_INFO "cleancache enabled, RAM provided by "
"Xen Transcendent Memory%s\n", s);
}
#endif
+#ifdef CONFIG_XEN_SELFBALLOONING
+ /*
+ * There is no point of driving pages to the swap system if they
+ * aren't going anywhere in tmem universe.
+ */
+ if (!frontswap) {
+ selfshrinking = false;
+ selfballooning = false;
+ }
+ xen_selfballoon_init(selfballooning, selfshrinking);
+#endif
return 0;
}
module_init(xen_tmem_init)
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dan Magenheimer <dan.magenheimer@oracle.com>");
+MODULE_DESCRIPTION("Shim to Xen transcendent memory");
diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index 90e34ac7e52..8abd7d57903 100644
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -25,6 +25,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/syscore_ops.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/processor.h>
@@ -51,9 +52,9 @@ static DEFINE_MUTEX(acpi_ids_mutex);
/* Which ACPI ID we have processed from 'struct acpi_processor'. */
static unsigned long *acpi_ids_done;
/* Which ACPI ID exist in the SSDT/DSDT processor definitions. */
-static unsigned long __initdata *acpi_id_present;
+static unsigned long *acpi_id_present;
/* And if there is an _CST definition (or a PBLK) for the ACPI IDs */
-static unsigned long __initdata *acpi_id_cst_present;
+static unsigned long *acpi_id_cst_present;
static int push_cxx_to_hypervisor(struct acpi_processor *_pr)
{
@@ -329,7 +330,7 @@ static unsigned int __init get_max_acpi_id(void)
* for_each_[present|online]_cpu macros which are banded to the virtual
* CPU amount.
*/
-static acpi_status __init
+static acpi_status
read_acpi_id(acpi_handle handle, u32 lvl, void *context, void **rv)
{
u32 acpi_id;
@@ -384,12 +385,16 @@ read_acpi_id(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
-static int __init check_acpi_ids(struct acpi_processor *pr_backup)
+static int check_acpi_ids(struct acpi_processor *pr_backup)
{
if (!pr_backup)
return -ENODEV;
+ if (acpi_id_present && acpi_id_cst_present)
+ /* OK, done this once .. skip to uploading */
+ goto upload;
+
/* All online CPUs have been processed at this stage. Now verify
* whether in fact "online CPUs" == physical CPUs.
*/
@@ -408,6 +413,7 @@ static int __init check_acpi_ids(struct acpi_processor *pr_backup)
read_acpi_id, NULL, NULL, NULL);
acpi_get_devices("ACPI0007", read_acpi_id, NULL, NULL);
+upload:
if (!bitmap_equal(acpi_id_present, acpi_ids_done, nr_acpi_bits)) {
unsigned int i;
for_each_set_bit(i, acpi_id_present, nr_acpi_bits) {
@@ -417,10 +423,7 @@ static int __init check_acpi_ids(struct acpi_processor *pr_backup)
(void)upload_pm_data(pr_backup);
}
}
- kfree(acpi_id_present);
- acpi_id_present = NULL;
- kfree(acpi_id_cst_present);
- acpi_id_cst_present = NULL;
+
return 0;
}
static int __init check_prereq(void)
@@ -467,10 +470,47 @@ static void free_acpi_perf_data(void)
free_percpu(acpi_perf_data);
}
-static int __init xen_acpi_processor_init(void)
+static int xen_upload_processor_pm_data(void)
{
struct acpi_processor *pr_backup = NULL;
unsigned int i;
+ int rc = 0;
+
+ pr_info(DRV_NAME "Uploading Xen processor PM info\n");
+
+ for_each_possible_cpu(i) {
+ struct acpi_processor *_pr;
+ _pr = per_cpu(processors, i /* APIC ID */);
+ if (!_pr)
+ continue;
+
+ if (!pr_backup) {
+ pr_backup = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
+ if (pr_backup)
+ memcpy(pr_backup, _pr, sizeof(struct acpi_processor));
+ }
+ (void)upload_pm_data(_pr);
+ }
+
+ rc = check_acpi_ids(pr_backup);
+ kfree(pr_backup);
+
+ return rc;
+}
+
+static void xen_acpi_processor_resume(void)
+{
+ bitmap_zero(acpi_ids_done, nr_acpi_bits);
+ xen_upload_processor_pm_data();
+}
+
+static struct syscore_ops xap_syscore_ops = {
+ .resume = xen_acpi_processor_resume,
+};
+
+static int __init xen_acpi_processor_init(void)
+{
+ unsigned int i;
int rc = check_prereq();
if (rc)
@@ -514,27 +554,12 @@ static int __init xen_acpi_processor_init(void)
goto err_out;
}
- for_each_possible_cpu(i) {
- struct acpi_processor *_pr;
- _pr = per_cpu(processors, i /* APIC ID */);
- if (!_pr)
- continue;
-
- if (!pr_backup) {
- pr_backup = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
- if (pr_backup)
- memcpy(pr_backup, _pr, sizeof(struct acpi_processor));
- }
- (void)upload_pm_data(_pr);
- }
- rc = check_acpi_ids(pr_backup);
-
- kfree(pr_backup);
- pr_backup = NULL;
-
+ rc = xen_upload_processor_pm_data();
if (rc)
goto err_unregister;
+ register_syscore_ops(&xap_syscore_ops);
+
return 0;
err_unregister:
for_each_possible_cpu(i) {
@@ -552,7 +577,10 @@ static void __exit xen_acpi_processor_exit(void)
{
int i;
+ unregister_syscore_ops(&xap_syscore_ops);
kfree(acpi_ids_done);
+ kfree(acpi_id_present);
+ kfree(acpi_id_cst_present);
for_each_possible_cpu(i) {
struct acpi_processor_performance *perf;
perf = per_cpu_ptr(acpi_perf_data, i);
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index a2278ba7fb2..4e8ba38aa0c 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -106,7 +106,7 @@ static void pcistub_device_release(struct kref *kref)
else
pci_restore_state(dev);
- if (pci_find_capability(dev, PCI_CAP_ID_MSIX)) {
+ if (dev->msix_cap) {
struct physdev_pci_device ppdev = {
.seg = pci_domain_nr(dev->bus),
.bus = dev->bus->number,
@@ -371,7 +371,7 @@ static int pcistub_init_device(struct pci_dev *dev)
if (err)
goto config_release;
- if (pci_find_capability(dev, PCI_CAP_ID_MSIX)) {
+ if (dev->msix_cap) {
struct physdev_pci_device ppdev = {
.seg = pci_domain_nr(dev->bus),
.bus = dev->bus->number,
diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c
index 2552d3e0a70..f70984a892a 100644
--- a/drivers/xen/xen-selfballoon.c
+++ b/drivers/xen/xen-selfballoon.c
@@ -53,15 +53,12 @@
* System configuration note: Selfballooning should not be enabled on
* systems without a sufficiently large swap device configured; for best
* results, it is recommended that total swap be increased by the size
- * of the guest memory. Also, while technically not required to be
- * configured, it is highly recommended that frontswap also be configured
- * and enabled when selfballooning is running. So, selfballooning
- * is disabled by default if frontswap is not configured and can only
- * be enabled with the "selfballooning" kernel boot option; similarly
- * selfballooning is enabled by default if frontswap is configured and
- * can be disabled with the "noselfballooning" kernel boot option. Finally,
- * when frontswap is configured, frontswap-selfshrinking can be disabled
- * with the "noselfshrink" kernel boot option.
+ * of the guest memory. Note, that selfballooning should be disabled by default
+ * if frontswap is not configured. Similarly selfballooning should be enabled
+ * by default if frontswap is configured and can be disabled with the
+ * "tmem.selfballooning=0" kernel boot option. Finally, when frontswap is
+ * configured, frontswap-selfshrinking can be disabled with the
+ * "tmem.selfshrink=0" kernel boot option.
*
* Selfballooning is disallowed in domain0 and force-disabled.
*
@@ -120,9 +117,6 @@ static DECLARE_DELAYED_WORK(selfballoon_worker, selfballoon_process);
/* Enable/disable with sysfs. */
static bool frontswap_selfshrinking __read_mostly;
-/* Enable/disable with kernel boot option. */
-static bool use_frontswap_selfshrink __initdata = true;
-
/*
* The default values for the following parameters were deemed reasonable
* by experimentation, may be workload-dependent, and can all be
@@ -176,35 +170,6 @@ static void frontswap_selfshrink(void)
frontswap_shrink(tgt_frontswap_pages);
}
-static int __init xen_nofrontswap_selfshrink_setup(char *s)
-{
- use_frontswap_selfshrink = false;
- return 1;
-}
-
-__setup("noselfshrink", xen_nofrontswap_selfshrink_setup);
-
-/* Disable with kernel boot option. */
-static bool use_selfballooning __initdata = true;
-
-static int __init xen_noselfballooning_setup(char *s)
-{
- use_selfballooning = false;
- return 1;
-}
-
-__setup("noselfballooning", xen_noselfballooning_setup);
-#else /* !CONFIG_FRONTSWAP */
-/* Enable with kernel boot option. */
-static bool use_selfballooning __initdata = false;
-
-static int __init xen_selfballooning_setup(char *s)
-{
- use_selfballooning = true;
- return 1;
-}
-
-__setup("selfballooning", xen_selfballooning_setup);
#endif /* CONFIG_FRONTSWAP */
#define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
@@ -537,7 +502,7 @@ int register_xen_selfballooning(struct device *dev)
}
EXPORT_SYMBOL(register_xen_selfballooning);
-static int __init xen_selfballoon_init(void)
+int xen_selfballoon_init(bool use_selfballooning, bool use_frontswap_selfshrink)
{
bool enable = false;
@@ -571,7 +536,4 @@ static int __init xen_selfballoon_init(void)
return 0;
}
-
-subsys_initcall(xen_selfballoon_init);
-
-MODULE_LICENSE("GPL");
+EXPORT_SYMBOL(xen_selfballoon_init);
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 61786be9138..ec097d6f964 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -534,7 +534,7 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
err = xenbus_map_ring(dev, gnt_ref, &node->handle, addr);
if (err)
- goto out_err;
+ goto out_err_free_ballooned_pages;
spin_lock(&xenbus_valloc_lock);
list_add(&node->next, &xenbus_valloc_pages);
@@ -543,8 +543,9 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
*vaddr = addr;
return 0;
- out_err:
+ out_err_free_ballooned_pages:
free_xenballooned_pages(1, &node->page);
+ out_err:
kfree(node);
return err;
}
diff --git a/drivers/xen/xenbus/xenbus_comms.h b/drivers/xen/xenbus/xenbus_comms.h
index c8abd3b8a6c..e74f9c1fbd8 100644
--- a/drivers/xen/xenbus/xenbus_comms.h
+++ b/drivers/xen/xenbus/xenbus_comms.h
@@ -45,6 +45,7 @@ int xb_wait_for_data_to_read(void);
int xs_input_avail(void);
extern struct xenstore_domain_interface *xen_store_interface;
extern int xen_store_evtchn;
+extern enum xenstore_init xen_store_domain_type;
extern const struct file_operations xen_xenbus_fops;
diff --git a/drivers/xen/xenbus/xenbus_dev_backend.c b/drivers/xen/xenbus/xenbus_dev_backend.c
index d7300080076..a6f42fc0140 100644
--- a/drivers/xen/xenbus/xenbus_dev_backend.c
+++ b/drivers/xen/xenbus/xenbus_dev_backend.c
@@ -70,22 +70,21 @@ static long xenbus_alloc(domid_t domid)
return err;
}
-static long xenbus_backend_ioctl(struct file *file, unsigned int cmd, unsigned long data)
+static long xenbus_backend_ioctl(struct file *file, unsigned int cmd,
+ unsigned long data)
{
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
switch (cmd) {
- case IOCTL_XENBUS_BACKEND_EVTCHN:
- if (xen_store_evtchn > 0)
- return xen_store_evtchn;
- return -ENODEV;
-
- case IOCTL_XENBUS_BACKEND_SETUP:
- return xenbus_alloc(data);
-
- default:
- return -ENOTTY;
+ case IOCTL_XENBUS_BACKEND_EVTCHN:
+ if (xen_store_evtchn > 0)
+ return xen_store_evtchn;
+ return -ENODEV;
+ case IOCTL_XENBUS_BACKEND_SETUP:
+ return xenbus_alloc(data);
+ default:
+ return -ENOTTY;
}
}
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 3325884c693..56cfaaa9d00 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -69,6 +69,9 @@ EXPORT_SYMBOL_GPL(xen_store_evtchn);
struct xenstore_domain_interface *xen_store_interface;
EXPORT_SYMBOL_GPL(xen_store_interface);
+enum xenstore_init xen_store_domain_type;
+EXPORT_SYMBOL_GPL(xen_store_domain_type);
+
static unsigned long xen_store_mfn;
static BLOCKING_NOTIFIER_HEAD(xenstore_chain);
@@ -719,17 +722,11 @@ static int __init xenstored_local_init(void)
return err;
}
-enum xenstore_init {
- UNKNOWN,
- PV,
- HVM,
- LOCAL,
-};
static int __init xenbus_init(void)
{
int err = 0;
- enum xenstore_init usage = UNKNOWN;
uint64_t v = 0;
+ xen_store_domain_type = XS_UNKNOWN;
if (!xen_domain())
return -ENODEV;
@@ -737,29 +734,29 @@ static int __init xenbus_init(void)
xenbus_ring_ops_init();
if (xen_pv_domain())
- usage = PV;
+ xen_store_domain_type = XS_PV;
if (xen_hvm_domain())
- usage = HVM;
+ xen_store_domain_type = XS_HVM;
if (xen_hvm_domain() && xen_initial_domain())
- usage = LOCAL;
+ xen_store_domain_type = XS_LOCAL;
if (xen_pv_domain() && !xen_start_info->store_evtchn)
- usage = LOCAL;
+ xen_store_domain_type = XS_LOCAL;
if (xen_pv_domain() && xen_start_info->store_evtchn)
xenstored_ready = 1;
- switch (usage) {
- case LOCAL:
+ switch (xen_store_domain_type) {
+ case XS_LOCAL:
err = xenstored_local_init();
if (err)
goto out_error;
xen_store_interface = mfn_to_virt(xen_store_mfn);
break;
- case PV:
+ case XS_PV:
xen_store_evtchn = xen_start_info->store_evtchn;
xen_store_mfn = xen_start_info->store_mfn;
xen_store_interface = mfn_to_virt(xen_store_mfn);
break;
- case HVM:
+ case XS_HVM:
err = hvm_get_parameter(HVM_PARAM_STORE_EVTCHN, &v);
if (err)
goto out_error;
diff --git a/drivers/xen/xenbus/xenbus_probe.h b/drivers/xen/xenbus/xenbus_probe.h
index bb4f92ed873..146f857a36f 100644
--- a/drivers/xen/xenbus/xenbus_probe.h
+++ b/drivers/xen/xenbus/xenbus_probe.h
@@ -47,6 +47,13 @@ struct xen_bus_type {
struct bus_type bus;
};
+enum xenstore_init {
+ XS_UNKNOWN,
+ XS_PV,
+ XS_HVM,
+ XS_LOCAL,
+};
+
extern struct device_attribute xenbus_dev_attrs[];
extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c
index 3159a37d966..a7e25073de1 100644
--- a/drivers/xen/xenbus/xenbus_probe_frontend.c
+++ b/drivers/xen/xenbus/xenbus_probe_frontend.c
@@ -29,6 +29,8 @@
#include "xenbus_probe.h"
+static struct workqueue_struct *xenbus_frontend_wq;
+
/* device/<type>/<id> => <type>-<id> */
static int frontend_bus_id(char bus_id[XEN_BUS_ID_SIZE], const char *nodename)
{
@@ -89,9 +91,40 @@ static void backend_changed(struct xenbus_watch *watch,
xenbus_otherend_changed(watch, vec, len, 1);
}
+static void xenbus_frontend_delayed_resume(struct work_struct *w)
+{
+ struct xenbus_device *xdev = container_of(w, struct xenbus_device, work);
+
+ xenbus_dev_resume(&xdev->dev);
+}
+
+static int xenbus_frontend_dev_resume(struct device *dev)
+{
+ /*
+ * If xenstored is running in this domain, we cannot access the backend
+ * state at the moment, so we need to defer xenbus_dev_resume
+ */
+ if (xen_store_domain_type == XS_LOCAL) {
+ struct xenbus_device *xdev = to_xenbus_device(dev);
+
+ if (!xenbus_frontend_wq) {
+ pr_err("%s: no workqueue to process delayed resume\n",
+ xdev->nodename);
+ return -EFAULT;
+ }
+
+ INIT_WORK(&xdev->work, xenbus_frontend_delayed_resume);
+ queue_work(xenbus_frontend_wq, &xdev->work);
+
+ return 0;
+ }
+
+ return xenbus_dev_resume(dev);
+}
+
static const struct dev_pm_ops xenbus_pm_ops = {
.suspend = xenbus_dev_suspend,
- .resume = xenbus_dev_resume,
+ .resume = xenbus_frontend_dev_resume,
.freeze = xenbus_dev_suspend,
.thaw = xenbus_dev_cancel,
.restore = xenbus_dev_resume,
@@ -440,6 +473,8 @@ static int __init xenbus_probe_frontend_init(void)
register_xenstore_notifier(&xenstore_notifier);
+ xenbus_frontend_wq = create_workqueue("xenbus_frontend");
+
return 0;
}
subsys_initcall(xenbus_probe_frontend_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-29 00:09:12 +0000