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-rw-r--r--drivers/tty/hvc/hvc_xen.c19
-rw-r--r--drivers/xen/Kconfig1
-rw-r--r--drivers/xen/balloon.c6
-rw-r--r--drivers/xen/evtchn.c2
-rw-r--r--drivers/xen/grant-table.c19
-rw-r--r--drivers/xen/pci.c47
-rw-r--r--drivers/xen/platform-pci.c2
-rw-r--r--drivers/xen/swiotlb-xen.c119
8 files changed, 179 insertions, 36 deletions
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index c193af6a628f..636c9baad7a5 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -183,7 +183,7 @@ static int dom0_write_console(uint32_t vtermno, const char *str, int len)
{
int rc = HYPERVISOR_console_io(CONSOLEIO_write, len, (char *)str);
if (rc < 0)
- return 0;
+ return rc;
return len;
}
@@ -642,7 +642,22 @@ struct console xenboot_console = {
void xen_raw_console_write(const char *str)
{
- dom0_write_console(0, str, strlen(str));
+ ssize_t len = strlen(str);
+ int rc = 0;
+
+ if (xen_domain()) {
+ rc = dom0_write_console(0, str, len);
+#ifdef CONFIG_X86
+ if (rc == -ENOSYS && xen_hvm_domain())
+ goto outb_print;
+
+ } else if (xen_cpuid_base()) {
+ int i;
+outb_print:
+ for (i = 0; i < len; i++)
+ outb(str[i], 0xe9);
+#endif
+ }
}
void xen_raw_printk(const char *fmt, ...)
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 23eae5cb69c2..c794ea182140 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -140,7 +140,6 @@ config XEN_GRANT_DEV_ALLOC
config SWIOTLB_XEN
def_bool y
- depends on PCI && X86
select SWIOTLB
config XEN_TMEM
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index b232908a6192..55ea73f7c70b 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -596,7 +596,7 @@ static void __init balloon_add_region(unsigned long start_pfn,
}
}
-static int __cpuinit balloon_cpu_notify(struct notifier_block *self,
+static int balloon_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
int cpu = (long)hcpu;
@@ -616,7 +616,7 @@ static int __cpuinit balloon_cpu_notify(struct notifier_block *self,
return NOTIFY_OK;
}
-static struct notifier_block balloon_cpu_notifier __cpuinitdata = {
+static struct notifier_block balloon_cpu_notifier = {
.notifier_call = balloon_cpu_notify,
};
@@ -641,7 +641,7 @@ static int __init balloon_init(void)
balloon_stats.current_pages = xen_pv_domain()
? min(xen_start_info->nr_pages - xen_released_pages, max_pfn)
- : max_pfn;
+ : get_num_physpages();
balloon_stats.target_pages = balloon_stats.current_pages;
balloon_stats.balloon_low = 0;
balloon_stats.balloon_high = 0;
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 8b3a69a06c39..5de2063e16d3 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -305,7 +305,7 @@ static int evtchn_bind_to_user(struct per_user_data *u, int port)
if (rc < 0)
goto err;
- rc = bind_evtchn_to_irqhandler(port, evtchn_interrupt, IRQF_DISABLED,
+ rc = bind_evtchn_to_irqhandler(port, evtchn_interrupt, 0,
u->name, evtchn);
if (rc < 0)
goto err;
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index c4d2298893b1..62ccf5424ba8 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -49,6 +49,7 @@
#include <xen/grant_table.h>
#include <xen/interface/memory.h>
#include <xen/hvc-console.h>
+#include <xen/swiotlb-xen.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/interface.h>
@@ -898,8 +899,16 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
&map_ops[i].status, __func__);
- if (xen_feature(XENFEAT_auto_translated_physmap))
+ /* this is basically a nop on x86 */
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ for (i = 0; i < count; i++) {
+ if (map_ops[i].status)
+ continue;
+ set_phys_to_machine(map_ops[i].host_addr >> PAGE_SHIFT,
+ map_ops[i].dev_bus_addr >> PAGE_SHIFT);
+ }
return ret;
+ }
if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {
arch_enter_lazy_mmu_mode();
@@ -942,8 +951,14 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
if (ret)
return ret;
- if (xen_feature(XENFEAT_auto_translated_physmap))
+ /* this is basically a nop on x86 */
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ for (i = 0; i < count; i++) {
+ set_phys_to_machine(unmap_ops[i].host_addr >> PAGE_SHIFT,
+ INVALID_P2M_ENTRY);
+ }
return ret;
+ }
if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {
arch_enter_lazy_mmu_mode();
diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c
index 18fff88254eb..d15f6e80479f 100644
--- a/drivers/xen/pci.c
+++ b/drivers/xen/pci.c
@@ -26,6 +26,7 @@
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#include "../pci/pci.h"
+#include <asm/pci_x86.h>
static bool __read_mostly pci_seg_supported = true;
@@ -192,3 +193,49 @@ static int __init register_xen_pci_notifier(void)
}
arch_initcall(register_xen_pci_notifier);
+
+#ifdef CONFIG_PCI_MMCONFIG
+static int __init xen_mcfg_late(void)
+{
+ struct pci_mmcfg_region *cfg;
+ int rc;
+
+ if (!xen_initial_domain())
+ return 0;
+
+ if ((pci_probe & PCI_PROBE_MMCONF) == 0)
+ return 0;
+
+ if (list_empty(&pci_mmcfg_list))
+ return 0;
+
+ /* Check whether they are in the right area. */
+ list_for_each_entry(cfg, &pci_mmcfg_list, list) {
+ struct physdev_pci_mmcfg_reserved r;
+
+ r.address = cfg->address;
+ r.segment = cfg->segment;
+ r.start_bus = cfg->start_bus;
+ r.end_bus = cfg->end_bus;
+ r.flags = XEN_PCI_MMCFG_RESERVED;
+
+ rc = HYPERVISOR_physdev_op(PHYSDEVOP_pci_mmcfg_reserved, &r);
+ switch (rc) {
+ case 0:
+ case -ENOSYS:
+ continue;
+
+ default:
+ pr_warn("Failed to report MMCONFIG reservation"
+ " state for %s to hypervisor"
+ " (%d)\n",
+ cfg->name, rc);
+ }
+ }
+ return 0;
+}
+/*
+ * Needs to be done after acpi_init which are subsys_initcall.
+ */
+subsys_initcall_sync(xen_mcfg_late);
+#endif
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index 99db9e1eb8ba..2f3528e93cb9 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -84,7 +84,7 @@ static irqreturn_t do_hvm_evtchn_intr(int irq, void *dev_id)
static int xen_allocate_irq(struct pci_dev *pdev)
{
return request_irq(pdev->irq, do_hvm_evtchn_intr,
- IRQF_DISABLED | IRQF_NOBALANCING | IRQF_TRIGGER_RISING,
+ IRQF_NOBALANCING | IRQF_TRIGGER_RISING,
"xen-platform-pci", pdev);
}
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 1b2277c311d2..a224bc74b6b9 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -42,12 +42,31 @@
#include <xen/page.h>
#include <xen/xen-ops.h>
#include <xen/hvc-console.h>
+
+#include <asm/dma-mapping.h>
+#include <asm/xen/page-coherent.h>
+
+#include <trace/events/swiotlb.h>
/*
* Used to do a quick range check in swiotlb_tbl_unmap_single and
* swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
* API.
*/
+#ifndef CONFIG_X86
+static unsigned long dma_alloc_coherent_mask(struct device *dev,
+ gfp_t gfp)
+{
+ unsigned long dma_mask = 0;
+
+ dma_mask = dev->coherent_dma_mask;
+ if (!dma_mask)
+ dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);
+
+ return dma_mask;
+}
+#endif
+
static char *xen_io_tlb_start, *xen_io_tlb_end;
static unsigned long xen_io_tlb_nslabs;
/*
@@ -56,17 +75,17 @@ static unsigned long xen_io_tlb_nslabs;
static u64 start_dma_addr;
-static dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
+static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
return phys_to_machine(XPADDR(paddr)).maddr;
}
-static phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
+static inline phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
return machine_to_phys(XMADDR(baddr)).paddr;
}
-static dma_addr_t xen_virt_to_bus(void *address)
+static inline dma_addr_t xen_virt_to_bus(void *address)
{
return xen_phys_to_bus(virt_to_phys(address));
}
@@ -89,7 +108,7 @@ static int check_pages_physically_contiguous(unsigned long pfn,
return 1;
}
-static int range_straddles_page_boundary(phys_addr_t p, size_t size)
+static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
{
unsigned long pfn = PFN_DOWN(p);
unsigned int offset = p & ~PAGE_MASK;
@@ -126,6 +145,8 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
{
int i, rc;
int dma_bits;
+ dma_addr_t dma_handle;
+ phys_addr_t p = virt_to_phys(buf);
dma_bits = get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT) + PAGE_SHIFT;
@@ -135,9 +156,9 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
do {
rc = xen_create_contiguous_region(
- (unsigned long)buf + (i << IO_TLB_SHIFT),
+ p + (i << IO_TLB_SHIFT),
get_order(slabs << IO_TLB_SHIFT),
- dma_bits);
+ dma_bits, &dma_handle);
} while (rc && dma_bits++ < max_dma_bits);
if (rc)
return rc;
@@ -263,7 +284,6 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
void *ret;
int order = get_order(size);
u64 dma_mask = DMA_BIT_MASK(32);
- unsigned long vstart;
phys_addr_t phys;
dma_addr_t dev_addr;
@@ -278,8 +298,12 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
if (dma_alloc_from_coherent(hwdev, size, dma_handle, &ret))
return ret;
- vstart = __get_free_pages(flags, order);
- ret = (void *)vstart;
+ /* On ARM this function returns an ioremap'ped virtual address for
+ * which virt_to_phys doesn't return the corresponding physical
+ * address. In fact on ARM virt_to_phys only works for kernel direct
+ * mapped RAM memory. Also see comment below.
+ */
+ ret = xen_alloc_coherent_pages(hwdev, size, dma_handle, flags, attrs);
if (!ret)
return ret;
@@ -287,18 +311,21 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
if (hwdev && hwdev->coherent_dma_mask)
dma_mask = dma_alloc_coherent_mask(hwdev, flags);
- phys = virt_to_phys(ret);
+ /* At this point dma_handle is the physical address, next we are
+ * going to set it to the machine address.
+ * Do not use virt_to_phys(ret) because on ARM it doesn't correspond
+ * to *dma_handle. */
+ phys = *dma_handle;
dev_addr = xen_phys_to_bus(phys);
if (((dev_addr + size - 1 <= dma_mask)) &&
!range_straddles_page_boundary(phys, size))
*dma_handle = dev_addr;
else {
- if (xen_create_contiguous_region(vstart, order,
- fls64(dma_mask)) != 0) {
- free_pages(vstart, order);
+ if (xen_create_contiguous_region(phys, order,
+ fls64(dma_mask), dma_handle) != 0) {
+ xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs);
return NULL;
}
- *dma_handle = virt_to_machine(ret).maddr;
}
memset(ret, 0, size);
return ret;
@@ -319,13 +346,15 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
if (hwdev && hwdev->coherent_dma_mask)
dma_mask = hwdev->coherent_dma_mask;
- phys = virt_to_phys(vaddr);
+ /* do not use virt_to_phys because on ARM it doesn't return you the
+ * physical address */
+ phys = xen_bus_to_phys(dev_addr);
if (((dev_addr + size - 1 > dma_mask)) ||
range_straddles_page_boundary(phys, size))
- xen_destroy_contiguous_region((unsigned long)vaddr, order);
+ xen_destroy_contiguous_region(phys, order);
- free_pages((unsigned long)vaddr, order);
+ xen_free_coherent_pages(hwdev, size, vaddr, (dma_addr_t)phys, attrs);
}
EXPORT_SYMBOL_GPL(xen_swiotlb_free_coherent);
@@ -352,16 +381,25 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
* buffering it.
*/
if (dma_capable(dev, dev_addr, size) &&
- !range_straddles_page_boundary(phys, size) && !swiotlb_force)
+ !range_straddles_page_boundary(phys, size) && !swiotlb_force) {
+ /* we are not interested in the dma_addr returned by
+ * xen_dma_map_page, only in the potential cache flushes executed
+ * by the function. */
+ xen_dma_map_page(dev, page, offset, size, dir, attrs);
return dev_addr;
+ }
/*
* Oh well, have to allocate and map a bounce buffer.
*/
+ trace_swiotlb_bounced(dev, dev_addr, size, swiotlb_force);
+
map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, size, dir);
if (map == SWIOTLB_MAP_ERROR)
return DMA_ERROR_CODE;
+ xen_dma_map_page(dev, pfn_to_page(map >> PAGE_SHIFT),
+ map & ~PAGE_MASK, size, dir, attrs);
dev_addr = xen_phys_to_bus(map);
/*
@@ -384,12 +422,15 @@ EXPORT_SYMBOL_GPL(xen_swiotlb_map_page);
* whatever the device wrote there.
*/
static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir)
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
phys_addr_t paddr = xen_bus_to_phys(dev_addr);
BUG_ON(dir == DMA_NONE);
+ xen_dma_unmap_page(hwdev, paddr, size, dir, attrs);
+
/* NOTE: We use dev_addr here, not paddr! */
if (is_xen_swiotlb_buffer(dev_addr)) {
swiotlb_tbl_unmap_single(hwdev, paddr, size, dir);
@@ -412,7 +453,7 @@ void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
- xen_unmap_single(hwdev, dev_addr, size, dir);
+ xen_unmap_single(hwdev, dev_addr, size, dir, attrs);
}
EXPORT_SYMBOL_GPL(xen_swiotlb_unmap_page);
@@ -435,11 +476,15 @@ xen_swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
BUG_ON(dir == DMA_NONE);
+ if (target == SYNC_FOR_CPU)
+ xen_dma_sync_single_for_cpu(hwdev, paddr, size, dir);
+
/* NOTE: We use dev_addr here, not paddr! */
- if (is_xen_swiotlb_buffer(dev_addr)) {
+ if (is_xen_swiotlb_buffer(dev_addr))
swiotlb_tbl_sync_single(hwdev, paddr, size, dir, target);
- return;
- }
+
+ if (target == SYNC_FOR_DEVICE)
+ xen_dma_sync_single_for_cpu(hwdev, paddr, size, dir);
if (dir != DMA_FROM_DEVICE)
return;
@@ -502,16 +547,26 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
sg->length,
dir);
if (map == SWIOTLB_MAP_ERROR) {
+ dev_warn(hwdev, "swiotlb buffer is full\n");
/* Don't panic here, we expect map_sg users
to do proper error handling. */
xen_swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
attrs);
sg_dma_len(sgl) = 0;
- return DMA_ERROR_CODE;
+ return 0;
}
sg->dma_address = xen_phys_to_bus(map);
- } else
+ } else {
+ /* we are not interested in the dma_addr returned by
+ * xen_dma_map_page, only in the potential cache flushes executed
+ * by the function. */
+ xen_dma_map_page(hwdev, pfn_to_page(paddr >> PAGE_SHIFT),
+ paddr & ~PAGE_MASK,
+ sg->length,
+ dir,
+ attrs);
sg->dma_address = dev_addr;
+ }
sg_dma_len(sg) = sg->length;
}
return nelems;
@@ -533,7 +588,7 @@ xen_swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i)
- xen_unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir);
+ xen_unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir, attrs);
}
EXPORT_SYMBOL_GPL(xen_swiotlb_unmap_sg_attrs);
@@ -593,3 +648,15 @@ xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask;
}
EXPORT_SYMBOL_GPL(xen_swiotlb_dma_supported);
+
+int
+xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask)
+{
+ if (!dev->dma_mask || !xen_swiotlb_dma_supported(dev, dma_mask))
+ return -EIO;
+
+ *dev->dma_mask = dma_mask;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xen_swiotlb_set_dma_mask);