Pull arm64 and cross-arch updates from Catalin Marinas: "Here's a slightly wider-spread set of updates for 5.9. Going outside the usual arch/arm64/ area is the removal of read_barrier_depends() series from Will and the MSI/IOMMU ID translation series from Lorenzo. The notable arm64 updates include ARMv8.4 TLBI range operations and translation level hint, time namespace support, and perf. Summary: - Removal of the tremendously unpopular read_barrier_depends() barrier, which is a NOP on all architectures apart from Alpha, in favour of allowing architectures to override READ_ONCE() and do whatever dance they need to do to ensure address dependencies provide LOAD -> LOAD/STORE ordering. This work also offers a potential solution if compilers are shown to convert LOAD -> LOAD address dependencies into control dependencies (e.g. under LTO), as weakly ordered architectures will effectively be able to upgrade READ_ONCE() to smp_load_acquire(). The latter case is not used yet, but will be discussed further at LPC. - Make the MSI/IOMMU input/output ID translation PCI agnostic, augment the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID bus-specific parameter and apply the resulting changes to the device ID space provided by the Freescale FSL bus. - arm64 support for TLBI range operations and translation table level hints (part of the ARMv8.4 architecture version). - Time namespace support for arm64. - Export the virtual and physical address sizes in vmcoreinfo for makedumpfile and crash utilities. - CPU feature handling cleanups and checks for programmer errors (overlapping bit-fields). - ACPI updates for arm64: disallow AML accesses to EFI code regions and kernel memory. - perf updates for arm64. - Miscellaneous fixes and cleanups, most notably PLT counting optimisation for module loading, recordmcount fix to ignore relocations other than R_AARCH64_CALL26, CMA areas reserved for gigantic pages on 16K and 64K configurations. - Trivial typos, duplicate words" Link: http://lkml.kernel.org/r/20200710165203.31284-1-will@kernel.org Link: http://lkml.kernel.org/r/20200619082013.13661-1-lorenzo.pieralisi@arm.com * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (82 commits) arm64: use IRQ_STACK_SIZE instead of THREAD_SIZE for irq stack arm64/mm: save memory access in check_and_switch_context() fast switch path arm64: sigcontext.h: delete duplicated word arm64: ptrace.h: delete duplicated word arm64: pgtable-hwdef.h: delete duplicated words bus: fsl-mc: Add ACPI support for fsl-mc bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver of/irq: Make of_msi_map_rid() PCI bus agnostic of/irq: make of_msi_map_get_device_domain() bus agnostic dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus of/device: Add input id to of_dma_configure() of/iommu: Make of_map_rid() PCI agnostic ACPI/IORT: Add an input ID to acpi_dma_configure() ACPI/IORT: Remove useless PCI bus walk ACPI/IORT: Make iort_msi_map_rid() PCI agnostic ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC arm64: enable time namespace support arm64/vdso: Restrict splitting VVAR VMA arm64/vdso: Handle faults on timens page ...
Showing the changes to include/uapi/linux (1 of 98 files). Show all
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| @@ -532,9 +532,10 @@ struct perf_event_mmap_page { · 531 unmodified lines | ||
| 532 | 532 | cap_bit0_is_deprecated : 1, /* Always 1, signals that bit 0 is zero */ |
| 533 | 533 | |
| 534 | 534 | cap_user_rdpmc : 1, /* The RDPMC instruction can be used to read counts */ |
| 535 | − cap_user_time : 1, /* The time_* fields are used */ | |
| 535 | + cap_user_time : 1, /* The time_{shift,mult,offset} fields are used */ | |
| 536 | 536 | cap_user_time_zero : 1, /* The time_zero field is used */ |
| 537 | − cap_____res : 59; | |
| 537 | + cap_user_time_short : 1, /* the time_{cycle,mask} fields are used */ | |
| 538 | + cap_____res : 58; | |
| 538 | 539 | }; |
| 539 | 540 | }; |
| 540 | 541 | |
| @@ -593,13 +594,29 @@ struct perf_event_mmap_page { · 52 unmodified lines | ||
| 593 | 594 | * ((rem * time_mult) >> time_shift); |
| 594 | 595 | */ |
| 595 | 596 | __u64 time_zero; |
| 597 | + | |
| 596 | 598 | __u32 size; /* Header size up to __reserved[] fields. */ |
| 599 | + __u32 __reserved_1; | |
| 600 | + | |
| 601 | + /* | |
| 602 | + * If cap_usr_time_short, the hardware clock is less than 64bit wide | |
| 603 | + * and we must compute the 'cyc' value, as used by cap_usr_time, as: | |
| 604 | + * | |
| 605 | + * cyc = time_cycles + ((cyc - time_cycles) & time_mask) | |
| 606 | + * | |
| 607 | + * NOTE: this form is explicitly chosen such that cap_usr_time_short | |
| 608 | + * is a correction on top of cap_usr_time, and code that doesn't | |
| 609 | + * know about cap_usr_time_short still works under the assumption | |
| 610 | + * the counter doesn't wrap. | |
| 611 | + */ | |
| 612 | + __u64 time_cycles; | |
| 613 | + __u64 time_mask; | |
| 597 | 614 | |
| 598 | 615 | /* |
| 599 | 616 | * Hole for extension of the self monitor capabilities |
| 600 | 617 | */ |
| 601 | 618 | |
| 602 | − __u8 __reserved[118*8+4]; /* align to 1k. */ | |
| 619 | + __u8 __reserved[116*8]; /* align to 1k. */ | |
| 603 | 620 | |
| 604 | 621 | /* |
| 605 | 622 | * Control data for the mmap() data buffer. |