diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 11:37:09 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 11:37:09 -0700 |
commit | a96480723c287c502b02659f4b347aecaa651ea1 (patch) | |
tree | 7abee4eb6d0d0b43103dc4f48554736d2b642bc2 /drivers | |
parent | a1be8edda4fe1f0a75007f26000a51436800869d (diff) | |
parent | 3dbd8204af48d0da442f11ad39aa778a5fd462bf (diff) |
Merge tag 'for-linus-4.12b-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross:
"Xen fixes and featrues for 4.12. The main changes are:
- enable building the kernel with Xen support but without enabling
paravirtualized mode (Vitaly Kuznetsov)
- add a new 9pfs xen frontend driver (Stefano Stabellini)
- simplify Xen's cpuid handling by making use of cpu capabilities
(Juergen Gross)
- add/modify some headers for new Xen paravirtualized devices
(Oleksandr Andrushchenko)
- EFI reset_system support under Xen (Julien Grall)
- and the usual cleanups and corrections"
* tag 'for-linus-4.12b-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (57 commits)
xen: Move xen_have_vector_callback definition to enlighten.c
xen: Implement EFI reset_system callback
arm/xen: Consolidate calls to shutdown hypercall in a single helper
xen: Export xen_reboot
xen/x86: Call xen_smp_intr_init_pv() on BSP
xen: Revert commits da72ff5bfcb0 and 72a9b186292d
xen/pvh: Do not fill kernel's e820 map in init_pvh_bootparams()
xen/scsifront: use offset_in_page() macro
xen/arm,arm64: rename __generic_dma_ops to xen_get_dma_ops
xen/arm,arm64: fix xen_dma_ops after 815dd18 "Consolidate get_dma_ops..."
xen/9pfs: select CONFIG_XEN_XENBUS_FRONTEND
x86/cpu: remove hypervisor specific set_cpu_features
vmware: set cpu capabilities during platform initialization
x86/xen: use capabilities instead of fake cpuid values for xsave
x86/xen: use capabilities instead of fake cpuid values for x2apic
x86/xen: use capabilities instead of fake cpuid values for mwait
x86/xen: use capabilities instead of fake cpuid values for acpi
x86/xen: use capabilities instead of fake cpuid values for acc
x86/xen: use capabilities instead of fake cpuid values for mtrr
x86/xen: use capabilities instead of fake cpuid values for aperf
...
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/scsi/xen-scsifront.c | 2 | ||||
-rw-r--r-- | drivers/xen/balloon.c | 30 | ||||
-rw-r--r-- | drivers/xen/efi.c | 18 | ||||
-rw-r--r-- | drivers/xen/events/events_base.c | 25 | ||||
-rw-r--r-- | drivers/xen/platform-pci.c | 14 | ||||
-rw-r--r-- | drivers/xen/swiotlb-xen.c | 8 |
6 files changed, 64 insertions, 33 deletions
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c index 9aa1fe1fc939..a6a8b60d4902 100644 --- a/drivers/scsi/xen-scsifront.c +++ b/drivers/scsi/xen-scsifront.c @@ -434,7 +434,7 @@ static int map_data_for_request(struct vscsifrnt_info *info, if (seg_grants) { page = virt_to_page(seg); - off = (unsigned long)seg & ~PAGE_MASK; + off = offset_in_page(seg); len = sizeof(struct scsiif_request_segment) * data_grants; while (len > 0) { bytes = min_t(unsigned int, len, PAGE_SIZE - off); diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index a6d4378eb8d9..50dcb68d8070 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -709,6 +709,7 @@ void free_xenballooned_pages(int nr_pages, struct page **pages) } EXPORT_SYMBOL(free_xenballooned_pages); +#ifdef CONFIG_XEN_PV static void __init balloon_add_region(unsigned long start_pfn, unsigned long pages) { @@ -732,19 +733,22 @@ static void __init balloon_add_region(unsigned long start_pfn, balloon_stats.total_pages += extra_pfn_end - start_pfn; } +#endif static int __init balloon_init(void) { - int i; - if (!xen_domain()) return -ENODEV; pr_info("Initialising balloon driver\n"); +#ifdef CONFIG_XEN_PV balloon_stats.current_pages = xen_pv_domain() ? min(xen_start_info->nr_pages - xen_released_pages, max_pfn) : get_num_physpages(); +#else + balloon_stats.current_pages = get_num_physpages(); +#endif balloon_stats.target_pages = balloon_stats.current_pages; balloon_stats.balloon_low = 0; balloon_stats.balloon_high = 0; @@ -761,14 +765,20 @@ static int __init balloon_init(void) register_sysctl_table(xen_root); #endif - /* - * Initialize the balloon with pages from the extra memory - * regions (see arch/x86/xen/setup.c). - */ - for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) - if (xen_extra_mem[i].n_pfns) - balloon_add_region(xen_extra_mem[i].start_pfn, - xen_extra_mem[i].n_pfns); +#ifdef CONFIG_XEN_PV + { + int i; + + /* + * Initialize the balloon with pages from the extra memory + * regions (see arch/x86/xen/setup.c). + */ + for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) + if (xen_extra_mem[i].n_pfns) + balloon_add_region(xen_extra_mem[i].start_pfn, + xen_extra_mem[i].n_pfns); + } +#endif return 0; } diff --git a/drivers/xen/efi.c b/drivers/xen/efi.c index 22f71ffd3406..9243a9051078 100644 --- a/drivers/xen/efi.c +++ b/drivers/xen/efi.c @@ -26,6 +26,7 @@ #include <xen/interface/xen.h> #include <xen/interface/platform.h> #include <xen/xen.h> +#include <xen/xen-ops.h> #include <asm/page.h> @@ -263,3 +264,20 @@ efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, return efi_data(op).status; } EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps); + +void xen_efi_reset_system(int reset_type, efi_status_t status, + unsigned long data_size, efi_char16_t *data) +{ + switch (reset_type) { + case EFI_RESET_COLD: + case EFI_RESET_WARM: + xen_reboot(SHUTDOWN_reboot); + break; + case EFI_RESET_SHUTDOWN: + xen_reboot(SHUTDOWN_poweroff); + break; + default: + BUG(); + } +} +EXPORT_SYMBOL_GPL(xen_efi_reset_system); diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 6a53577772c9..b52852f38cff 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1312,6 +1312,9 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu) if (!VALID_EVTCHN(evtchn)) return -1; + if (!xen_support_evtchn_rebind()) + return -1; + /* Send future instances of this interrupt to other vcpu. */ bind_vcpu.port = evtchn; bind_vcpu.vcpu = xen_vcpu_nr(tcpu); @@ -1646,14 +1649,20 @@ void xen_callback_vector(void) int rc; uint64_t callback_via; - callback_via = HVM_CALLBACK_VECTOR(HYPERVISOR_CALLBACK_VECTOR); - rc = xen_set_callback_via(callback_via); - BUG_ON(rc); - pr_info("Xen HVM callback vector for event delivery is enabled\n"); - /* in the restore case the vector has already been allocated */ - if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, - xen_hvm_callback_vector); + if (xen_have_vector_callback) { + callback_via = HVM_CALLBACK_VECTOR(HYPERVISOR_CALLBACK_VECTOR); + rc = xen_set_callback_via(callback_via); + if (rc) { + pr_err("Request for Xen HVM callback vector failed\n"); + xen_have_vector_callback = 0; + return; + } + pr_info("Xen HVM callback vector for event delivery is enabled\n"); + /* in the restore case the vector has already been allocated */ + if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, + xen_hvm_callback_vector); + } } #else void xen_callback_vector(void) {} diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c index 2a165cc8a43c..1275df83070f 100644 --- a/drivers/xen/platform-pci.c +++ b/drivers/xen/platform-pci.c @@ -90,8 +90,10 @@ static int xen_allocate_irq(struct pci_dev *pdev) static int platform_pci_resume(struct pci_dev *pdev) { int err; - if (!xen_pv_domain()) + + if (xen_have_vector_callback) return 0; + err = xen_set_callback_via(callback_via); if (err) { dev_err(&pdev->dev, "platform_pci_resume failure!\n"); @@ -137,15 +139,7 @@ static int platform_pci_probe(struct pci_dev *pdev, platform_mmio = mmio_addr; platform_mmiolen = mmio_len; - - /* - * Xen HVM guests always use the vector callback mechanism. - * L1 Dom0 in a nested Xen environment is a PV guest inside in an - * HVM environment. It needs the platform-pci driver to get - * notifications from L0 Xen, but it cannot use the vector callback - * as it is not exported by L1 Xen. - */ - if (xen_pv_domain()) { + if (!xen_have_vector_callback) { ret = xen_allocate_irq(pdev); if (ret) { dev_warn(&pdev->dev, "request_irq failed err=%d\n", ret); diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index e8cef1ad0fe3..8dab0d3dc172 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -693,8 +693,8 @@ xen_swiotlb_dma_mmap(struct device *dev, struct vm_area_struct *vma, unsigned long attrs) { #if defined(CONFIG_ARM) || defined(CONFIG_ARM64) - if (__generic_dma_ops(dev)->mmap) - return __generic_dma_ops(dev)->mmap(dev, vma, cpu_addr, + if (xen_get_dma_ops(dev)->mmap) + return xen_get_dma_ops(dev)->mmap(dev, vma, cpu_addr, dma_addr, size, attrs); #endif return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size); @@ -711,7 +711,7 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt, unsigned long attrs) { #if defined(CONFIG_ARM) || defined(CONFIG_ARM64) - if (__generic_dma_ops(dev)->get_sgtable) { + if (xen_get_dma_ops(dev)->get_sgtable) { #if 0 /* * This check verifies that the page belongs to the current domain and @@ -721,7 +721,7 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt, unsigned long bfn = PHYS_PFN(dma_to_phys(dev, handle)); BUG_ON (!page_is_ram(bfn)); #endif - return __generic_dma_ops(dev)->get_sgtable(dev, sgt, cpu_addr, + return xen_get_dma_ops(dev)->get_sgtable(dev, sgt, cpu_addr, handle, size, attrs); } #endif |