xen: bug fixes for 4.7-rc0
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJXRGqXAAoJEFxbo/MsZsTRSr8H/AwybQygAqBPoxsC2VkdSD0u csHnXuG/37ABep55A0ZgNIwq/JNK1m7K0+Xq6S6pO6UTH8gl32Fx2uPiHoXEdzmK KfwQPx8ETaVtOSrzPJdPdspXTNngEsvopTPGPRKG6VNE3JwtTiwkHcXiez6nJ8XB 2YqGjYOdKNsu/sAUo5aCrc7eCcdCu/hc6pWFNtfSBRSLhR1Eofl81B6B0BCvi5D0 5/TOX+YnZ4omNeYlxghFvZKa/HyfE/0CONbyijjVoLcd8i2EptNosdCc9WgRTOAZ nwnsABYg0izPZYNgr5HJUwfNLnVymtg8gg7b2WpKkM0Xvd7uPjrYA1vpHh1yA48= =OfVJ -----END PGP SIGNATURE----- Merge tag 'for-linus-4.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen bug fixes from David Vrabel. * tag 'for-linus-4.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: use same main loop for counting and remapping pages xen/events: Don't move disabled irqs xen/x86: actually allocate legacy interrupts on PV guests Xen: don't warn about 2-byte wchar_t in efi xen/gntdev: reduce copy batch size to 16 xen/x86: don't lose event interrupts
This commit is contained in:
Linus Torvalds
commit
29567292c0
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@ -491,8 +491,11 @@ int __init pci_xen_initial_domain(void)
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#endif
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__acpi_register_gsi = acpi_register_gsi_xen;
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__acpi_unregister_gsi = NULL;
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/* Pre-allocate legacy irqs */
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for (irq = 0; irq < nr_legacy_irqs(); irq++) {
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/*
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* Pre-allocate the legacy IRQs. Use NR_LEGACY_IRQS here
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* because we don't have a PIC and thus nr_legacy_irqs() is zero.
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*/
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for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
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int trigger, polarity;
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if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
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@ -393,6 +393,9 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
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unsigned long i = 0;
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unsigned long n = end_pfn - start_pfn;
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if (remap_pfn == 0)
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remap_pfn = nr_pages;
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while (i < n) {
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unsigned long cur_pfn = start_pfn + i;
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unsigned long left = n - i;
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@ -438,17 +441,29 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
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return remap_pfn;
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}
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static void __init xen_set_identity_and_remap(unsigned long nr_pages)
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static unsigned long __init xen_count_remap_pages(
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unsigned long start_pfn, unsigned long end_pfn, unsigned long nr_pages,
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unsigned long remap_pages)
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{
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if (start_pfn >= nr_pages)
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return remap_pages;
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return remap_pages + min(end_pfn, nr_pages) - start_pfn;
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}
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static unsigned long __init xen_foreach_remap_area(unsigned long nr_pages,
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unsigned long (*func)(unsigned long start_pfn, unsigned long end_pfn,
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unsigned long nr_pages, unsigned long last_val))
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{
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phys_addr_t start = 0;
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unsigned long last_pfn = nr_pages;
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unsigned long ret_val = 0;
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const struct e820entry *entry = xen_e820_map;
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int i;
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/*
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* Combine non-RAM regions and gaps until a RAM region (or the
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* end of the map) is reached, then set the 1:1 map and
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* remap the memory in those non-RAM regions.
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* end of the map) is reached, then call the provided function
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* to perform its duty on the non-RAM region.
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*
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* The combined non-RAM regions are rounded to a whole number
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* of pages so any partial pages are accessible via the 1:1
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@ -466,14 +481,13 @@ static void __init xen_set_identity_and_remap(unsigned long nr_pages)
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end_pfn = PFN_UP(entry->addr);
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if (start_pfn < end_pfn)
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last_pfn = xen_set_identity_and_remap_chunk(
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start_pfn, end_pfn, nr_pages,
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last_pfn);
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ret_val = func(start_pfn, end_pfn, nr_pages,
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ret_val);
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start = end;
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}
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}
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pr_info("Released %ld page(s)\n", xen_released_pages);
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return ret_val;
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}
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/*
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@ -596,35 +610,6 @@ static void __init xen_ignore_unusable(void)
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}
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}
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static unsigned long __init xen_count_remap_pages(unsigned long max_pfn)
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{
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unsigned long extra = 0;
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unsigned long start_pfn, end_pfn;
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const struct e820entry *entry = xen_e820_map;
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int i;
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end_pfn = 0;
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for (i = 0; i < xen_e820_map_entries; i++, entry++) {
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start_pfn = PFN_DOWN(entry->addr);
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/* Adjacent regions on non-page boundaries handling! */
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end_pfn = min(end_pfn, start_pfn);
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if (start_pfn >= max_pfn)
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return extra + max_pfn - end_pfn;
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/* Add any holes in map to result. */
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extra += start_pfn - end_pfn;
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end_pfn = PFN_UP(entry->addr + entry->size);
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end_pfn = min(end_pfn, max_pfn);
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if (entry->type != E820_RAM)
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extra += end_pfn - start_pfn;
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}
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return extra;
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}
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bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size)
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{
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struct e820entry *entry;
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@ -804,7 +789,7 @@ char * __init xen_memory_setup(void)
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max_pages = xen_get_max_pages();
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/* How many extra pages do we need due to remapping? */
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max_pages += xen_count_remap_pages(max_pfn);
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max_pages += xen_foreach_remap_area(max_pfn, xen_count_remap_pages);
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if (max_pages > max_pfn)
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extra_pages += max_pages - max_pfn;
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@ -922,7 +907,9 @@ char * __init xen_memory_setup(void)
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* Set identity map on non-RAM pages and prepare remapping the
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* underlying RAM.
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*/
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xen_set_identity_and_remap(max_pfn);
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xen_foreach_remap_area(max_pfn, xen_set_identity_and_remap_chunk);
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pr_info("Released %ld page(s)\n", xen_released_pages);
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return "Xen";
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}
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@ -290,11 +290,11 @@ static int xen_vcpuop_set_next_event(unsigned long delta,
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WARN_ON(!clockevent_state_oneshot(evt));
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single.timeout_abs_ns = get_abs_timeout(delta);
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single.flags = VCPU_SSHOTTMR_future;
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/* Get an event anyway, even if the timeout is already expired */
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single.flags = 0;
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ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &single);
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BUG_ON(ret != 0 && ret != -ETIME);
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BUG_ON(ret != 0);
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return ret;
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}
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@ -8,6 +8,7 @@ nostackp := $(call cc-option, -fno-stack-protector)
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CFLAGS_features.o := $(nostackp)
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CFLAGS_efi.o += -fshort-wchar
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LDFLAGS += $(call ld-option, --no-wchar-size-warning)
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dom0-$(CONFIG_PCI) += pci.o
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dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
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@ -487,7 +487,8 @@ static void eoi_pirq(struct irq_data *data)
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if (!VALID_EVTCHN(evtchn))
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return;
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if (unlikely(irqd_is_setaffinity_pending(data))) {
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if (unlikely(irqd_is_setaffinity_pending(data)) &&
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likely(!irqd_irq_disabled(data))) {
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int masked = test_and_set_mask(evtchn);
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clear_evtchn(evtchn);
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@ -1370,7 +1371,8 @@ static void ack_dynirq(struct irq_data *data)
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if (!VALID_EVTCHN(evtchn))
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return;
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if (unlikely(irqd_is_setaffinity_pending(data))) {
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if (unlikely(irqd_is_setaffinity_pending(data)) &&
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likely(!irqd_irq_disabled(data))) {
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int masked = test_and_set_mask(evtchn);
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clear_evtchn(evtchn);
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@ -748,7 +748,7 @@ static long gntdev_ioctl_notify(struct gntdev_priv *priv, void __user *u)
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return rc;
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}
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#define GNTDEV_COPY_BATCH 24
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#define GNTDEV_COPY_BATCH 16
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struct gntdev_copy_batch {
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struct gnttab_copy ops[GNTDEV_COPY_BATCH];
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