A Bisect shows:
40ed11e0049a5856848e59a6275ba08b734accc8 is the first bad commit
commit 40ed11e0049a5856848e59a6275ba08b734accc8
Author: Jon Doron <ari...@gmail.com>
Date: Fri Apr 24 14:37:40 2020 +0300
x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit
BugLink: https://bugs.launchpad.net/bugs/1885176
[ Upstream commit f7d31e65368aeef973fab788aa22c4f1d5a6af66 ]
The problem the patch is trying to address is the fact that 'struct
kvm_hyperv_exit' has different layout on when compiling in 32 and 64 bit
modes.
In 64-bit mode the default alignment boundary is 64 bits thus
forcing extra gaps after 'type' and 'msr' but in 32-bit mode the
boundary is at 32 bits thus no extra gaps.
This is an issue as even when the kernel is 64 bit, the userspace using
the interface can be both 32 and 64 bit but the same 32 bit userspace has
to work with 32 bit kernel.
The issue is fixed by forcing the 64 bit layout, this leads to ABI
change for 32 bit builds and while we are obviously breaking '32 bit
userspace with 32 bit kernel' case, we're fixing the '32 bit userspace
with 64 bit kernel' one.
As the interface has no (known) users and 32 bit KVM is rather baroque
nowadays, this seems like a reasonable decision.
Reviewed-by: Vitaly Kuznetsov <vkuzn...@redhat.com>
Signed-off-by: Jon Doron <ari...@gmail.com>
Message-Id: <20200424113746.3473563-2-ari...@gmail.com>
Reviewed-by: Roman Kagan <rvka...@yandex-team.ru>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmou...@canonical.com>
:040000 040000 e62587476ed3db655527a1e55776ad3dd7756ff6
d085168ac233723af3b4e0e2c079e97d72f6f7e1 M Documentation
:040000 040000 10bf0fe682799f3de914b15a1066636bc25e989a
f78b5dad5a85cf65f04c372532d654c0d2c094f8 M include
$ git bisect log
git bisect start
# bad: [0e158155817fc6ac0a55648943e52b1004747d74] UBUNTU: Ubuntu-4.15.0-116.117
git bisect bad 0e158155817fc6ac0a55648943e52b1004747d74
# good: [495149ddc61a5997857fda041ccd4c81cac46e00] UBUNTU: Ubuntu-4.15.0-112.113
git bisect good 495149ddc61a5997857fda041ccd4c81cac46e00
# bad: [672e9dec222925652241f8522bb7e7483d0fa74c] drm/amdgpu: Replace invalid
device ID with a valid device ID
git bisect bad 672e9dec222925652241f8522bb7e7483d0fa74c
# bad: [cebf29010efca3b7f7e195f80f5fd9db5f93afea] PCI: Don't disable decoding
when mmio_always_on is set
git bisect bad cebf29010efca3b7f7e195f80f5fd9db5f93afea
# good: [8606a3b9726b9efb0a92015372be88a84b291406] s390/mm: fix
set_huge_pte_at() for empty ptes
git bisect good 8606a3b9726b9efb0a92015372be88a84b291406
# good: [692fb8958a8fbb0b3b645e73ef89b1e75a543538] ath9k: Fix general
protection fault in ath9k_hif_usb_rx_cb
git bisect good 692fb8958a8fbb0b3b645e73ef89b1e75a543538
# bad: [749a10fcdcb6e6e3afa26aa9994325f8fcb19eda] tools api fs: Make
xxx__mountpoint() more scalable
git bisect bad 749a10fcdcb6e6e3afa26aa9994325f8fcb19eda
# good: [c0cf7189d1b30c7c5423ce2aa6442f3e2f026568] net: ena: fix error
returning in ena_com_get_hash_function()
git bisect good c0cf7189d1b30c7c5423ce2aa6442f3e2f026568
# good: [bec58f7e892951fea92df69801315b67ed0b73ce] clocksource:
dw_apb_timer_of: Fix missing clockevent timers
git bisect good bec58f7e892951fea92df69801315b67ed0b73ce
# bad: [40ed11e0049a5856848e59a6275ba08b734accc8] x86/kvm/hyper-v: Explicitly
align hcall param for kvm_hyperv_exit
git bisect bad 40ed11e0049a5856848e59a6275ba08b734accc8
# good: [0f92ac206e457a32da575c4f72afdc80143b809d] ARM: 8978/1: mm: make
act_mm() respect THREAD_SIZE
git bisect good 0f92ac206e457a32da575c4f72afdc80143b809d
# good: [9502e85ad1c8470ff8acefc16de6afd57bb49b0a] spi: dw: Fix Rx-only DMA
transfers
git bisect good 9502e85ad1c8470ff8acefc16de6afd57bb49b0a
# first bad commit: [40ed11e0049a5856848e59a6275ba08b734accc8] x86/kvm/hyper-v:
Explicitly align hcall param for kvm_hyperv_exit
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1892855
Title:
[Potential Regression] hyperv_connections / hyperv_stimer /
hyperv_synic failed on B-i386
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
Issue found on 4.15.0-114.115, with i386 generic /lowlatency on node
fozzie.
All 3 tests failed with timeout issue:
* hyperv_connections
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.UwdQ0PZort -smp 2
-cpu kvm64,hv_vpindex,hv_synic -device hyperv-testdev # -initrd
/tmp/tmp.GNmO7BfE7a
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 453000
cr4 = 10
EAX=00459001 EBX=0040aae0 ECX=40000083 EDX=00000000
ESI=00000000 EDI=00000000 EBP=0044b158 ESP=0044b130
EIP=004006b9 EFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0010 0044a1f0 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0080 00406280 0000ffff 00008b00 DPL=0 TSS32-busy
GDT= 00406000 0000027f
IDT= 00000000 00000fff
CR0=80010011 CR2=00000000 CR3=00453000 CR4=00000010
DR0=00000000 DR1=00000000 DR2=664fb17c DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000
Code=87 e0 aa 40 00 83 c8 01 ba 00 00 00 00 b9 83 00 00 40 0f 30 <8b> 43 04
83 c8 01 b9 82 00 00 40 0f 30 b8 01 00 00 00 b9 80 00 00 40 0f 30 83 c4 0c 0f b6
qemu-system-i386: terminating on signal 15 from pid 12753 (timeout)
FAIL hyperv_connections (timeout; duration=90s)
* hyperv_stimer
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.P9Uky1nZUD -smp 2
-cpu kvm64,hv_vpindex,hv_time,hv_synic,hv_stimer -device hyperv-testdev #
-initrd /tmp/tmp.uulivUIlYy
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 453000
cr4 = 10
enabling apic
cpus = 2
EAX=00458001 EBX=0040aa9c ECX=40000083 EDX=00000000
ESI=00000000 EDI=00000004 EBP=0044aab8 ESP=0044aaa0
EIP=0040070c EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0010 00449b60 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0080 00406280 0000ffff 00008b00 DPL=0 TSS32-busy
GDT= 00406000 0000027f
IDT= 00000000 00000fff
CR0=80010011 CR2=00000000 CR3=00453000 CR4=00000010
DR0=00000000 DR1=00000000 DR2=4036d141 DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000
Code=86 64 aa 40 00 83 c8 01 ba 00 00 00 00 b9 83 00 00 40 0f 30 01 00 00 00
b9 80 00 00 40 0f 30 83 ec 04 6a 00 68 f1 00 00 00 6a 02 e8 ac 02 00 00 83
EAX=00459001 EBX=0040aad8 ECX=40000083 EDX=00000000
ESI=0000003c EDI=00000004 EBP=0009ffbc ESP=0009ffa4
EIP=0040070c EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0010 0009f000 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0088 004062e8 0000ffff 00008b00 DPL=0 TSS32-busy
GDT= 00406000 0000027f
IDT= 00000000 00000fff
CR0=e0000011 CR2=00000000 CR3=00453000 CR4=00000010
DR0=00000000 DR1=00000000 DR2=2d1ab8b7 DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000
Code=86 64 aa 40 00 83 c8 01 ba 00 00 00 00 b9 83 00 00 40 0f 30 01 00 00 00
b9 80 00 00 40 0f 30 83 ec 04 6a 00 68 f1 00 00 00 6a 02 e8 ac 02 00 00 83
qemu-system-i386: terminating on signal 15 from pid 12956 (timeout)
FAIL hyperv_stimer (timeout; duration=90s)
* hyperv_synic
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.31xb2AFzst -smp 2
-cpu kvm64,hv_vpindex,hv_synic -device hyperv-testdev # -initrd
/tmp/tmp.TrTv7F4PNR
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 454000
cr4 = 10
enabling apic
ncpus = 2
prepare
EAX=00467001 EBX=00000000 ECX=40000083 EDX=00000000
ESI=00000001 EDI=0040035d EBP=0044b7a8 ESP=0044b7a0
EIP=004003bc EFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0010 0044a870 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0080 00407280 0000ffff 00008b00 DPL=0 TSS32-busy
GDT= 00407000 0000027f
IDT= 00000000 00000fff
CR0=80010011 CR2=00000000 CR3=00454000 CR4=00000010
DR0=00000000 DR1=00000000 DR2=21f9ba9d DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000
Code=1c 00 00 83 c8 01 bb 00 00 00 00 b9 83 00 00 40 89 da 0f 30 40 1c 00 00
83 c8 01 b9 82 00 00 40 89 da 0f 30 b8 01 00 00 00 b9 80 00 00 40 0f 30 e8
EAX=00468001 EBX=00000000 ECX=40000083 EDX=00000000
ESI=0040035d EDI=00454000 EBP=0009ffbc ESP=0009ffb4
EIP=004003bc EFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0010 0009f000 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0088 004072e8 0000ffff 00008b00 DPL=0 TSS32-busy
GDT= 00407000 0000027f
IDT= 00000000 00000fff
CR0=e0000011 CR2=00000000 CR3=00454000 CR4=00000010
DR0=00000000 DR1=00000000 DR2=3135efd9 DR3=00000000
DR6=ffff0ff0 DR7=00000400
EFER=0000000000000000
Code=1c 00 00 83 c8 01 bb 00 00 00 00 b9 83 00 00 40 89 da 0f 30 40 1c 00 00
83 c8 01 b9 82 00 00 40 89 da 0f 30 b8 01 00 00 00 b9 80 00 00 40 0f 30 e8
qemu-system-i386: terminating on signal 15 from pid 13160 (timeout)
FAIL hyperv_synic (timeout; duration=90s)
These 3 tests were skipped / passed in 4.15.0-112.113:
* hyperv_connections
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.kk19hBFFOa -smp 2
-cpu kvm64,hv_vpindex,hv_synic -device hyperv-testdev # -initrd
/tmp/tmp.iFsWaupJ8x
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 453000
cr4 = 10
SKIP: Hyper-V SynIC connections are not supported
SUMMARY: 1 tests, 1 skipped
SKIP hyperv_connections (1 tests, 1 skipped)
* hyperv_stimer
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.mHE6kfD8aI -smp 2
-cpu kvm64,hv_vpindex,hv_time,hv_synic,hv_stimer -device hyperv-testdev #
-initrd /tmp/tmp.px8J6EErWg
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 453000
cr4 = 10
enabling apic
cpus = 2
PASS: Hyper-V SynIC periodic timers test vcpu 0
PASS: Hyper-V SynIC periodic timers test vcpu 1
PASS: Hyper-V SynIC one-shot test vcpu 0
PASS: Hyper-V SynIC one-shot test vcpu 1
PASS: Hyper-V SynIC auto-enable one-shot timer test vcpu 0
PASS: Hyper-V SynIC auto-enable one-shot timer test vcpu 1
PASS: Hyper-V SynIC auto-enable periodic timer test vcpu 0
PASS: Hyper-V SynIC auto-enable periodic timer test vcpu 1
PASS: no timer fired while msg slot busy: vcpu 0
PASS: no timer fired while msg slot busy: vcpu 1
PASS: timer resumed when msg slot released: vcpu 0
PASS: timer resumed when msg slot released: vcpu 1
SUMMARY: 12 tests
PASS hyperv_stimer (12 tests)
* hyperv_synic
timeout -k 1s --foreground 90s /usr/bin/qemu-system-i386 -nodefaults -device
pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial
stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.Uh5zREsVu5 -smp 2
-cpu kvm64,hv_vpindex,hv_synic -device hyperv-testdev # -initrd
/tmp/tmp.z95qOX5WXi
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.syscall [bit 11]
qemu-system-i386: warning: host doesn't support requested feature:
CPUID.80000001H:EDX.lm [bit 29]
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 454000
cr4 = 10
enabling apic
ncpus = 2
prepare
test 0 -> 1
test 1 -> 0
cleanup
isr_enter_count[0] = 16
isr_enter_count[1] = 16
PASS: Hyper-V SynIC test
SUMMARY: 1 tests
PASS hyperv_synic (1 tests)
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