https://github.com/torvalds/linux
Revision c112b5f50232a257056903040c66d97efb536889 authored by Luwei Kang on 14 February 2019, 02:48:07 UTC, committed by Paolo Bonzini on 14 February 2019, 15:20:31 UTC
Some Posted-Interrupts from passthrough devices may be lost or overwritten when the vCPU is in runnable state. The SN (Suppress Notification) of PID (Posted Interrupt Descriptor) will be set when the vCPU is preempted (vCPU in KVM_MP_STATE_RUNNABLE state but not running on physical CPU). If a posted interrupt comes at this time, the irq remapping facility will set the bit of PIR (Posted Interrupt Requests) but not ON (Outstanding Notification). Then, the interrupt will not be seen by KVM, which always expects PID.ON=1 if PID.PIR=1 as documented in the Intel processor SDM but not in the VT-d specification. To fix this, restore the invariant after PID.SN is cleared. Signed-off-by: Luwei Kang <luwei.kang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 08e1675
Tip revision: c112b5f50232a257056903040c66d97efb536889 authored by Luwei Kang on 14 February 2019, 02:48:07 UTC
KVM: x86: Recompute PID.ON when clearing PID.SN
KVM: x86: Recompute PID.ON when clearing PID.SN
Tip revision: c112b5f
| File | Mode | Size |
|---|---|---|
| 842 | ||
| fonts | ||
| lz4 | ||
| lzo | ||
| mpi | ||
| raid6 | ||
| reed_solomon | ||
| xz | ||
| zlib_deflate | ||
| zlib_inflate | ||
| zstd | ||
| .gitignore | -rw-r--r-- | 98 bytes |
| Kconfig | -rw-r--r-- | 14.0 KB |
| Kconfig.debug | -rw-r--r-- | 69.0 KB |
| Kconfig.kasan | -rw-r--r-- | 4.7 KB |
| Kconfig.kgdb | -rw-r--r-- | 4.1 KB |
| Kconfig.ubsan | -rw-r--r-- | 1.5 KB |
| Makefile | -rw-r--r-- | 8.9 KB |
| argv_split.c | -rw-r--r-- | 2.1 KB |
| ashldi3.c | -rw-r--r-- | 1.1 KB |
| ashrdi3.c | -rw-r--r-- | 1.2 KB |
| asn1_decoder.c | -rw-r--r-- | 13.4 KB |
| assoc_array.c | -rw-r--r-- | 51.9 KB |
| atomic64.c | -rw-r--r-- | 4.8 KB |
| atomic64_test.c | -rw-r--r-- | 6.6 KB |
| audit.c | -rw-r--r-- | 1.8 KB |
| bcd.c | -rw-r--r-- | 297 bytes |
| bch.c | -rw-r--r-- | 36.1 KB |
| bitmap.c | -rw-r--r-- | 35.8 KB |
| bitrev.c | -rw-r--r-- | 1.9 KB |
| bsearch.c | -rw-r--r-- | 1.5 KB |
| btree.c | -rw-r--r-- | 19.3 KB |
| bucket_locks.c | -rw-r--r-- | 1.4 KB |
| bug.c | -rw-r--r-- | 5.5 KB |
| build_OID_registry | -rwxr-xr-x | 4.7 KB |
| bust_spinlocks.c | -rw-r--r-- | 676 bytes |
| chacha.c | -rw-r--r-- | 3.8 KB |
| check_signature.c | -rw-r--r-- | 635 bytes |
| checksum.c | -rw-r--r-- | 5.0 KB |
| clz_ctz.c | -rw-r--r-- | 1.3 KB |
| clz_tab.c | -rw-r--r-- | 891 bytes |
| cmdline.c | -rw-r--r-- | 5.1 KB |
| cmpdi2.c | -rw-r--r-- | 1.1 KB |
| compat_audit.c | -rw-r--r-- | 832 bytes |
| cordic.c | -rw-r--r-- | 2.2 KB |
| cpu_rmap.c | -rw-r--r-- | 7.8 KB |
| cpumask.c | -rw-r--r-- | 5.8 KB |
| crc-ccitt.c | -rw-r--r-- | 5.7 KB |
| crc-itu-t.c | -rw-r--r-- | 2.8 KB |
| crc-t10dif.c | -rw-r--r-- | 3.0 KB |
| crc16.c | -rw-r--r-- | 2.8 KB |
| crc32.c | -rw-r--r-- | 9.3 KB |
| crc32defs.h | -rw-r--r-- | 1.6 KB |
| crc32test.c | -rw-r--r-- | 37.5 KB |
| crc4.c | -rw-r--r-- | 1.1 KB |
| crc64.c | -rw-r--r-- | 1.7 KB |
| crc7.c | -rw-r--r-- | 2.6 KB |
| crc8.c | -rw-r--r-- | 2.4 KB |
| ctype.c | -rw-r--r-- | 1.4 KB |
| debug_info.c | -rw-r--r-- | 777 bytes |
| debug_locks.c | -rw-r--r-- | 1.2 KB |
| debugobjects.c | -rw-r--r-- | 29.4 KB |
| dec_and_lock.c | -rw-r--r-- | 1.2 KB |
| decompress.c | -rw-r--r-- | 1.7 KB |
| decompress_bunzip2.c | -rw-r--r-- | 23.5 KB |
| decompress_inflate.c | -rw-r--r-- | 4.5 KB |
| decompress_unlz4.c | -rw-r--r-- | 4.2 KB |
| decompress_unlzma.c | -rw-r--r-- | 15.8 KB |
| decompress_unlzo.c | -rw-r--r-- | 7.1 KB |
| decompress_unxz.c | -rw-r--r-- | 10.9 KB |
| devres.c | -rw-r--r-- | 11.2 KB |
| digsig.c | -rw-r--r-- | 5.7 KB |
| div64.c | -rw-r--r-- | 4.3 KB |
| dump_stack.c | -rw-r--r-- | 3.0 KB |
| dynamic_debug.c | -rw-r--r-- | 25.5 KB |
| dynamic_queue_limits.c | -rw-r--r-- | 4.3 KB |
| earlycpio.c | -rw-r--r-- | 4.0 KB |
| error-inject.c | -rw-r--r-- | 5.4 KB |
| errseq.c | -rw-r--r-- | 6.6 KB |
| extable.c | -rw-r--r-- | 3.2 KB |
| fault-inject.c | -rw-r--r-- | 6.2 KB |
| fdt.c | -rw-r--r-- | 69 bytes |
| fdt_empty_tree.c | -rw-r--r-- | 80 bytes |
| fdt_ro.c | -rw-r--r-- | 72 bytes |
| fdt_rw.c | -rw-r--r-- | 72 bytes |
| fdt_strerror.c | -rw-r--r-- | 78 bytes |
| fdt_sw.c | -rw-r--r-- | 72 bytes |
| fdt_wip.c | -rw-r--r-- | 73 bytes |
| find_bit.c | -rw-r--r-- | 5.3 KB |
| find_bit_benchmark.c | -rw-r--r-- | 4.3 KB |
| flex_array.c | -rw-r--r-- | 11.0 KB |
| flex_proportions.c | -rw-r--r-- | 6.9 KB |
| gcd.c | -rw-r--r-- | 1.4 KB |
| gen_crc32table.c | -rw-r--r-- | 3.3 KB |
| gen_crc64table.c | -rw-r--r-- | 1.4 KB |
| genalloc.c | -rw-r--r-- | 21.9 KB |
| glob.c | -rw-r--r-- | 3.5 KB |
| globtest.c | -rw-r--r-- | 4.2 KB |
| hexdump.c | -rw-r--r-- | 8.3 KB |
| hweight.c | -rw-r--r-- | 2.0 KB |
| idr.c | -rw-r--r-- | 17.3 KB |
| inflate.c | -rw-r--r-- | 38.7 KB |
| int_sqrt.c | -rw-r--r-- | 1.1 KB |
| interval_tree.c | -rw-r--r-- | 499 bytes |
| interval_tree_test.c | -rw-r--r-- | 3.4 KB |
| iomap.c | -rw-r--r-- | 6.5 KB |
| iomap_copy.c | -rw-r--r-- | 2.8 KB |
| iommu-helper.c | -rw-r--r-- | 755 bytes |
| ioremap.c | -rw-r--r-- | 5.0 KB |
| iov_iter.c | -rw-r--r-- | 40.4 KB |
| irq_poll.c | -rw-r--r-- | 5.4 KB |
| irq_regs.c | -rw-r--r-- | 604 bytes |
| is_single_threaded.c | -rw-r--r-- | 1.4 KB |
| jedec_ddr_data.c | -rw-r--r-- | 3.0 KB |
| kasprintf.c | -rw-r--r-- | 1.4 KB |
| kfifo.c | -rw-r--r-- | 12.7 KB |
| klist.c | -rw-r--r-- | 10.4 KB |
| kobject.c | -rw-r--r-- | 26.8 KB |
| kobject_uevent.c | -rw-r--r-- | 18.7 KB |
| kstrtox.c | -rw-r--r-- | 10.5 KB |
| kstrtox.h | -rw-r--r-- | 293 bytes |
| lcm.c | -rw-r--r-- | 441 bytes |
| libcrc32c.c | -rw-r--r-- | 2.2 KB |
| list_debug.c | -rw-r--r-- | 1.8 KB |
| list_sort.c | -rw-r--r-- | 3.6 KB |
| llist.c | -rw-r--r-- | 3.1 KB |
| locking-selftest-hardirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-mutex.h | -rw-r--r-- | 159 bytes |
| locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-rsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest-rtmutex.h | -rw-r--r-- | 162 bytes |
| locking-selftest-softirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin.h | -rw-r--r-- | 157 bytes |
| locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-wsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest.c | -rw-r--r-- | 43.7 KB |
| lockref.c | -rw-r--r-- | 4.4 KB |
| logic_pio.c | -rw-r--r-- | 7.7 KB |
| lru_cache.c | -rw-r--r-- | 19.4 KB |
| lshrdi3.c | -rw-r--r-- | 1.2 KB |
| memcat_p.c | -rw-r--r-- | 753 bytes |
| memory-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| memweight.c | -rw-r--r-- | 1.0 KB |
| muldi3.c | -rw-r--r-- | 2.3 KB |
| net_utils.c | -rw-r--r-- | 640 bytes |
| netdev-notifier-error-inject.c | -rw-r--r-- | 1.5 KB |
| nlattr.c | -rw-r--r-- | 21.7 KB |
| nmi_backtrace.c | -rw-r--r-- | 3.0 KB |
| nodemask.c | -rw-r--r-- | 653 bytes |
| notifier-error-inject.c | -rw-r--r-- | 2.7 KB |
| notifier-error-inject.h | -rw-r--r-- | 653 bytes |
| objagg.c | -rw-r--r-- | 14.4 KB |
| of-reconfig-notifier-error-inject.c | -rw-r--r-- | 1.3 KB |
| oid_registry.c | -rw-r--r-- | 3.9 KB |
| once.c | -rw-r--r-- | 1.4 KB |
| parman.c | -rw-r--r-- | 10.6 KB |
| parser.c | -rw-r--r-- | 8.1 KB |
| pci_iomap.c | -rw-r--r-- | 4.2 KB |
| percpu-refcount.c | -rw-r--r-- | 13.3 KB |
| percpu_counter.c | -rw-r--r-- | 5.8 KB |
| percpu_test.c | -rw-r--r-- | 3.2 KB |
| plist.c | -rw-r--r-- | 5.9 KB |
| pm-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| prime_numbers.c | -rw-r--r-- | 6.5 KB |
| radix-tree.c | -rw-r--r-- | 43.9 KB |
| random32.c | -rw-r--r-- | 12.8 KB |
| ratelimit.c | -rw-r--r-- | 1.6 KB |
| rational.c | -rw-r--r-- | 1.6 KB |
| rbtree.c | -rw-r--r-- | 18.7 KB |
| rbtree_test.c | -rw-r--r-- | 9.4 KB |
| reciprocal_div.c | -rw-r--r-- | 1.4 KB |
| refcount.c | -rw-r--r-- | 11.2 KB |
| rhashtable.c | -rw-r--r-- | 29.4 KB |
| sbitmap.c | -rw-r--r-- | 16.9 KB |
| scatterlist.c | -rw-r--r-- | 24.1 KB |
| seq_buf.c | -rw-r--r-- | 8.0 KB |
| sg_pool.c | -rw-r--r-- | 3.6 KB |
| sg_split.c | -rw-r--r-- | 5.1 KB |
| sha1.c | -rw-r--r-- | 6.1 KB |
| sha256.c | -rw-r--r-- | 10.1 KB |
| show_mem.c | -rw-r--r-- | 1.2 KB |
| siphash.c | -rw-r--r-- | 11.7 KB |
| smp_processor_id.c | -rw-r--r-- | 1.3 KB |
| sort.c | -rw-r--r-- | 2.5 KB |
| stackdepot.c | -rw-r--r-- | 8.8 KB |
| stmp_device.c | -rw-r--r-- | 2.1 KB |
| string.c | -rw-r--r-- | 22.4 KB |
| string_helpers.c | -rw-r--r-- | 13.5 KB |
| strncpy_from_user.c | -rw-r--r-- | 3.2 KB |
| strnlen_user.c | -rw-r--r-- | 3.5 KB |
| syscall.c | -rw-r--r-- | 2.7 KB |
| test-kstrtox.c | -rw-r--r-- | 17.3 KB |
| test-string_helpers.c | -rw-r--r-- | 10.3 KB |
| test_bitfield.c | -rw-r--r-- | 4.3 KB |
| test_bitmap.c | -rw-r--r-- | 9.6 KB |
| test_bpf.c | -rw-r--r-- | 159.2 KB |
| test_debug_virtual.c | -rw-r--r-- | 940 bytes |
| test_firmware.c | -rw-r--r-- | 21.6 KB |
| test_hash.c | -rw-r--r-- | 6.3 KB |
| test_hexdump.c | -rw-r--r-- | 6.3 KB |
| test_ida.c | -rw-r--r-- | 4.3 KB |
| test_kasan.c | -rw-r--r-- | 13.6 KB |
| test_kmod.c | -rw-r--r-- | 30.0 KB |
| test_list_sort.c | -rw-r--r-- | 3.3 KB |
| test_memcat_p.c | -rw-r--r-- | 2.2 KB |
| test_module.c | -rw-r--r-- | 753 bytes |
| test_objagg.c | -rw-r--r-- | 20.1 KB |
| test_overflow.c | -rw-r--r-- | 22.3 KB |
| test_parman.c | -rw-r--r-- | 11.2 KB |
| test_printf.c | -rw-r--r-- | 14.0 KB |
| test_rhashtable.c | -rw-r--r-- | 20.2 KB |
| test_siphash.c | -rw-r--r-- | 7.5 KB |
| test_sort.c | -rw-r--r-- | 829 bytes |
| test_static_key_base.c | -rw-r--r-- | 2.0 KB |
| test_static_keys.c | -rw-r--r-- | 6.0 KB |
| test_string.c | -rw-r--r-- | 2.4 KB |
| test_sysctl.c | -rw-r--r-- | 3.3 KB |
| test_ubsan.c | -rw-r--r-- | 2.5 KB |
| test_user_copy.c | -rw-r--r-- | 5.5 KB |
| test_uuid.c | -rw-r--r-- | 3.4 KB |
| test_xarray.c | -rw-r--r-- | 35.5 KB |
| textsearch.c | -rw-r--r-- | 9.5 KB |
| timerqueue.c | -rw-r--r-- | 3.3 KB |
| ts_bm.c | -rw-r--r-- | 5.3 KB |
| ts_fsm.c | -rw-r--r-- | 10.6 KB |
| ts_kmp.c | -rw-r--r-- | 4.3 KB |
| ubsan.c | -rw-r--r-- | 11.1 KB |
| ubsan.h | -rw-r--r-- | 1.7 KB |
| ucmpdi2.c | -rw-r--r-- | 1.2 KB |
| ucs2_string.c | -rw-r--r-- | 2.5 KB |
| usercopy.c | -rw-r--r-- | 737 bytes |
| uuid.c | -rw-r--r-- | 3.0 KB |
| vsprintf.c | -rw-r--r-- | 76.6 KB |
| win_minmax.c | -rw-r--r-- | 3.4 KB |
| xarray.c | -rw-r--r-- | 51.9 KB |
| xxhash.c | -rw-r--r-- | 12.7 KB |
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