Hi all, This patch series has been tested for both TCG and KVM scenes. 1) Test for TCG: - Re-compile qemu after applying the patch refered to https://patchwork.kernel.org/cover/10942757/#22640271). - Use command line shown below to start qemu: ./qemu-system-aarch64 \ -name guest=ras \ -machine virt,gic-version=3,ras=on \ -cpu cortex-a57 \ -bios /usr/share/edk2/aarch64/QEMU_EFI.fd \ -nodefaults \ -kernel ${GUEST_KERNEL} \ -initrd ${GUEST_FS} \ -append "rdinit=init console=ttyAMA0 earlycon=pl011,0x9000000" \ -m 8192 \ -smp 4 \ -serial stdio \ - Send a signal to one of the VCPU threads: kill -s SIGBUS 71571 - The result of test is shown below: [ 41.194753] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0 [ 41.197329] {1}[Hardware Error]: event severity: recoverable [ 41.199078] {1}[Hardware Error]: Error 0, type: recoverable [ 41.200829] {1}[Hardware Error]: section_type: memory error [ 41.202603] {1}[Hardware Error]: physical_address: 0x00000000400a1000 [ 41.204649] {1}[Hardware Error]: error_type: 0, unknown [ 41.206328] EDAC MC0: 1 UE Unknown on unknown label ( page:0x400a1 offset:0x0 grain:0) [ 41.208788] Internal error: synchronous external abort: 96000410 [#1] SMP [ 41.210879] Modules linked in: [ 41.211823] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.0+ #8 [ 41.213698] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 41.215812] pstate: 60c00085 (nZCv daIf +PAN +UAO) [ 41.217296] pc : cpu_do_idle+0x8/0xc [ 41.218400] lr : arch_cpu_idle+0x2c/0x1b8 [ 41.219629] sp : ffff000009f9bf00 [ 41.220649] x29: ffff000009f9bf00 x28: 0000000000000000 [ 41.222310] x27: 0000000000000000 x26: ffff8001fe471d80 [ 41.223945] x25: 0000000000000000 x24: ffff00000937ba38 [ 41.225581] x23: ffff0000090b3338 x22: ffff000009379000 [ 41.227220] x21: ffff00000937b000 x20: 0000000000000004 [ 41.228871] x19: ffff0000090a6000 x18: 0000000000000000 [ 41.230517] x17: 0000000000000000 x16: 0000000000000000 [ 41.232165] x15: 0000000000000000 x14: 0000000000000000 [ 41.233810] x13: ffff0000089f4da8 x12: 000000000000000e [ 41.235448] x11: ffff0000089f4d80 x10: 0000000000000af0 [ 41.237101] x9 : ffff000009f9be80 x8 : ffff8001fe4728d0 [ 41.238738] x7 : 0000000000000004 x6 : ffff8001fffbaf30 [ 41.240380] x5 : ffff00000c43b940 x4 : 00008001f6f0c000 [ 41.242030] x3 : 0000000000000001 x2 : ffff000009f9bf00 [ 41.243666] x1 : ffff8001fffb82c8 x0 : ffff0000090a6018 [ 41.245306] Process swapper/2 (pid: 0, stack limit = 0x(____ptrval____)) [ 41.247378] Call trace: [ 41.248117] cpu_do_idle+0x8/0xc [ 41.249111] do_idle+0x1dc/0x2a8 [ 41.250111] cpu_startup_entry+0x28/0x30 [ 41.251319] secondary_start_kernel+0x180/0x1c8 [ 41.252725] Code: a8c17bfd d65f03c0 d5033f9f d503207f (d65f03c0) [ 41.254606] ---[ end trace 221bc8a614fb5a1d ]--- [ 41.256030] Kernel panic - not syncing: Fatal exception [ 41.257644] SMP: stopping secondary CPUs [ 41.258912] Kernel Offset: disabled [ 41.260011] CPU features: 0x0,22a00238 [ 41.261178] Memory Limit: none [ 41.262122] ---[ end Kernel panic - not syncing: Fatal exception ]--- 2) Test for KVM: - Use command line shown below to start qemu: ./qemu-system-aarch64 \ -name guest=ras \ -machine virt,accel=kvm,gic-version=3,ras=on \ -cpu host \ -bios /usr/share/edk2/aarch64/QEMU_EFI.fd \ -nodefaults \ -kernel ${GUEST_KERNEL} \ -initrd ${GUEST_FS} \ -append "rdinit=init console=ttyAMA0 earlycon=pl011,0x9000000" \ -m 8192 \ -smp 4 \ -serial stdio \ - Run mca-recover and get the GPA(IPA) of allocated page which would be corrupted on the later. - Convert the GPA to HPA and corrupt this HPA via APEI/EINJ. - Go back to guest and continue to read this page. - The result of test is shown below: root@genericarmv8:~/tools# ./mca-recover pagesize: 0x1000 before clear cache flags for page 0x2317b2: uptodate active mmap anon swapbacked vtop(0xffff9c9e8000) = 0x2317b2000 Hit any key to access: before read after read Access at Tue Sep 17 01:41:14 2019 flags for page 0x2317b2: uptodate active mmap anon swapbacked [ 403.298539] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0 [ 403.301421] {1}[Hardware Error]: event severity: recoverable [ 403.303217] {1}[Hardware Error]: Error 0, type: recoverable [ 403.304920] {1}[Hardware Error]: section_type: memory error [ 403.306645] {1}[Hardware Error]: physical_address: 0x00000002317b2000 [ 403.308947] {1}[Hardware Error]: error_type: 0, unknown [ 403.310630] WARNING: CPU: 0 PID: 510 at drivers/edac/ghes_edac.c:202 ghes_edac_report_mem_error+0x648/0xb20 [ 403.310630] Modules linked in: [ 403.310631] CPU: 0 PID: 510 Comm: mca-recover Not tainted 4.19.0+ #8 [ 403.310632] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 403.310632] pstate: 60000005 (nZCv daif -PAN -UAO) [ 403.310632] pc : ghes_edac_report_mem_error+0x648/0xb20 [ 403.310633] lr : ghes_proc+0x3d8/0x950 [ 403.310633] sp : ffff00000c543b20 [ 403.310633] x29: ffff00000c543b50 x28: ffff8001f5918014 [ 403.310634] x27: 0000000000000000 x26: b1837ced833e63b8 [ 403.310635] x25: 430fbbc1d995e954 x24: 0000000000000002 [ 403.310636] x23: 0000000000000002 x22: ffff0000096ec000 [ 403.310637] x21: ffff000009379000 x20: ffff8001f591805c [ 403.310638] x19: ffff8001f591e71c x18: ffffffffffffffff [ 403.310638] x17: 0000000000000000 x16: 0000000000000000 [ 403.310639] x15: ffff000009379708 x14: 0000000000000000 [ 403.310640] x13: 0000000000000002 x12: 317b200000000000 [ 403.310641] x11: 0000000000000000 x10: 0000400200000000 [ 403.310642] x9 : 0000000000000000 x8 : 00000002540be3ff [ 403.310642] x7 : 0000000000000000 x6 : ffff0000096dce30 [ 403.310643] x5 : 4ede6f64a5bc1114 x4 : 0000000000000000 [ 403.310644] x3 : ffff0000096ec4f0 x2 : ffff8001f591805c [ 403.310645] x1 : 0000000000000000 x0 : 0000000000110000 [ 403.310646] Call trace: [ 403.310646] ghes_edac_report_mem_error+0x648/0xb20 [ 403.310646] ghes_proc+0x3d8/0x950 [ 403.310647] ghes_notify_sea+0x3c/0x68 [ 403.310647] do_sea+0x9c/0x188 [ 403.310647] do_mem_abort+0x74/0x140 [ 403.310648] el0_da+0x24/0x28 [ 403.310648] ---[ end trace 651f1abaa6b1de2d ]--- Recover: sig=7 si=0xffffc9bc5640 v=0xffffc9bc56c0[ 403.364295] Memory failure: 0x2317b2: recovery action for dirty LRU page: Recovered [ 403.364295] Memory failure: 0x2317b2: recovery action for dirty LRU page: Recovered Platform memory error at 0x(nil) Addr = (nil) lsb=0 Recovery allocated new page at physical 0x232563000 Got 2a2a2a2a -- Thanks, Xiang
