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-rw-r--r--arch/arm/include/asm/xen/page.h1
-rw-r--r--arch/arm/xen/enlighten.c9
-rw-r--r--arch/x86/include/asm/xen/page.h1
-rw-r--r--drivers/xen/grant-table.c58
-rw-r--r--drivers/xen/platform-pci.c10
-rw-r--r--include/xen/grant_table.h9
6 files changed, 75 insertions, 13 deletions
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index ac6789a..709c4b4 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -118,5 +118,6 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
}
#define xen_remap(cookie, size) ioremap_cached((cookie), (size))
+#define xen_unmap(cookie) iounmap((cookie))
#endif /* _ASM_ARM_XEN_PAGE_H */
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 8550123..2162172 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -208,6 +208,7 @@ static int __init xen_guest_init(void)
const char *version = NULL;
const char *xen_prefix = "xen,xen-";
struct resource res;
+ unsigned long grant_frames;
node = of_find_compatible_node(NULL, NULL, "xen,xen");
if (!node) {
@@ -224,10 +225,10 @@ static int __init xen_guest_init(void)
}
if (of_address_to_resource(node, GRANT_TABLE_PHYSADDR, &res))
return 0;
- xen_hvm_resume_frames = res.start;
+ grant_frames = res.start;
xen_events_irq = irq_of_parse_and_map(node, 0);
pr_info("Xen %s support found, events_irq=%d gnttab_frame_pfn=%lx\n",
- version, xen_events_irq, (xen_hvm_resume_frames >> PAGE_SHIFT));
+ version, xen_events_irq, (grant_frames >> PAGE_SHIFT));
xen_domain_type = XEN_HVM_DOMAIN;
xen_setup_features();
@@ -265,6 +266,10 @@ static int __init xen_guest_init(void)
if (xen_vcpu_info == NULL)
return -ENOMEM;
+ if (gnttab_setup_auto_xlat_frames(grant_frames)) {
+ free_percpu(xen_vcpu_info);
+ return -ENOMEM;
+ }
gnttab_init();
if (!xen_initial_domain())
xenbus_probe(NULL);
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index 4a092cc..3e276eb 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -227,5 +227,6 @@ void make_lowmem_page_readonly(void *vaddr);
void make_lowmem_page_readwrite(void *vaddr);
#define xen_remap(cookie, size) ioremap((cookie), (size));
+#define xen_unmap(cookie) iounmap((cookie))
#endif /* _ASM_X86_XEN_PAGE_H */
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index e69c778..44b75cc 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -65,8 +65,7 @@ static unsigned int nr_grant_frames;
static int gnttab_free_count;
static grant_ref_t gnttab_free_head;
static DEFINE_SPINLOCK(gnttab_list_lock);
-unsigned long xen_hvm_resume_frames;
-EXPORT_SYMBOL_GPL(xen_hvm_resume_frames);
+struct grant_frames xen_auto_xlat_grant_frames;
static union {
struct grant_entry_v1 *v1;
@@ -838,6 +837,51 @@ unsigned int gnttab_max_grant_frames(void)
}
EXPORT_SYMBOL_GPL(gnttab_max_grant_frames);
+int gnttab_setup_auto_xlat_frames(unsigned long addr)
+{
+ xen_pfn_t *pfn;
+ unsigned int max_nr_gframes = __max_nr_grant_frames();
+ unsigned int i;
+ void *vaddr;
+
+ if (xen_auto_xlat_grant_frames.count)
+ return -EINVAL;
+
+ vaddr = xen_remap(addr, PAGE_SIZE * max_nr_gframes);
+ if (vaddr == NULL) {
+ pr_warn("Failed to ioremap gnttab share frames (addr=0x%08lx)!\n",
+ addr);
+ return -ENOMEM;
+ }
+ pfn = kcalloc(max_nr_gframes, sizeof(pfn[0]), GFP_KERNEL);
+ if (!pfn) {
+ xen_unmap(vaddr);
+ return -ENOMEM;
+ }
+ for (i = 0; i < max_nr_gframes; i++)
+ pfn[i] = PFN_DOWN(addr) + i;
+
+ xen_auto_xlat_grant_frames.vaddr = vaddr;
+ xen_auto_xlat_grant_frames.pfn = pfn;
+ xen_auto_xlat_grant_frames.count = max_nr_gframes;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gnttab_setup_auto_xlat_frames);
+
+void gnttab_free_auto_xlat_frames(void)
+{
+ if (!xen_auto_xlat_grant_frames.count)
+ return;
+ kfree(xen_auto_xlat_grant_frames.pfn);
+ xen_unmap(xen_auto_xlat_grant_frames.vaddr);
+
+ xen_auto_xlat_grant_frames.pfn = NULL;
+ xen_auto_xlat_grant_frames.count = 0;
+ xen_auto_xlat_grant_frames.vaddr = NULL;
+}
+EXPORT_SYMBOL_GPL(gnttab_free_auto_xlat_frames);
+
/* Handling of paged out grant targets (GNTST_eagain) */
#define MAX_DELAY 256
static inline void
@@ -1068,6 +1112,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
struct xen_add_to_physmap xatp;
unsigned int i = end_idx;
rc = 0;
+ BUG_ON(xen_auto_xlat_grant_frames.count < nr_gframes);
/*
* Loop backwards, so that the first hypercall has the largest
* index, ensuring that the table will grow only once.
@@ -1076,7 +1121,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
xatp.domid = DOMID_SELF;
xatp.idx = i;
xatp.space = XENMAPSPACE_grant_table;
- xatp.gpfn = (xen_hvm_resume_frames >> PAGE_SHIFT) + i;
+ xatp.gpfn = xen_auto_xlat_grant_frames.pfn[i];
rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp);
if (rc != 0) {
pr_warn("grant table add_to_physmap failed, err=%d\n",
@@ -1174,11 +1219,10 @@ static int gnttab_setup(void)
return -ENOSYS;
if (xen_feature(XENFEAT_auto_translated_physmap) && gnttab_shared.addr == NULL) {
- gnttab_shared.addr = xen_remap(xen_hvm_resume_frames,
- PAGE_SIZE * max_nr_gframes);
+ gnttab_shared.addr = xen_auto_xlat_grant_frames.vaddr;
if (gnttab_shared.addr == NULL) {
- pr_warn("Failed to ioremap gnttab share frames (addr=0x%08lx)!\n",
- xen_hvm_resume_frames);
+ pr_warn("gnttab share frames (addr=0x%08lx) is not mapped!\n",
+ (unsigned long)xen_auto_xlat_grant_frames.vaddr);
return -ENOMEM;
}
}
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index 2f3528e..f1947ac 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -108,6 +108,7 @@ static int platform_pci_init(struct pci_dev *pdev,
long ioaddr;
long mmio_addr, mmio_len;
unsigned int max_nr_gframes;
+ unsigned long grant_frames;
if (!xen_domain())
return -ENODEV;
@@ -154,13 +155,16 @@ static int platform_pci_init(struct pci_dev *pdev,
}
max_nr_gframes = gnttab_max_grant_frames();
- xen_hvm_resume_frames = alloc_xen_mmio(PAGE_SIZE * max_nr_gframes);
+ grant_frames = alloc_xen_mmio(PAGE_SIZE * max_nr_gframes);
+ if (gnttab_setup_auto_xlat_frames(grant_frames))
+ goto out;
ret = gnttab_init();
if (ret)
- goto out;
+ goto grant_out;
xenbus_probe(NULL);
return 0;
-
+grant_out:
+ gnttab_free_auto_xlat_frames();
out:
pci_release_region(pdev, 0);
mem_out:
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 694dcaf..5acb1e4 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -178,8 +178,15 @@ int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
grant_status_t **__shared);
void arch_gnttab_unmap(void *shared, unsigned long nr_gframes);
-extern unsigned long xen_hvm_resume_frames;
+struct grant_frames {
+ xen_pfn_t *pfn;
+ unsigned int count;
+ void *vaddr;
+};
+extern struct grant_frames xen_auto_xlat_grant_frames;
unsigned int gnttab_max_grant_frames(void);
+int gnttab_setup_auto_xlat_frames(unsigned long addr);
+void gnttab_free_auto_xlat_frames(void);
#define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr))
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