[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
Fix Released
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad: [906b60facc3d3dd3af56cb1a7860175d805e10a3] target/arm: Add formats for
some vfp 2 and 3-register insns
git bisect bad 906b60facc3d3dd3af56cb1a7860175d805e10a3
# good: [c52881bbc22b50db99a6c37171ad3eea7d959ae6] target/arm: Replace
ARM_FEATURE_VFP4 with isar_feature_aa32_simdfmac
git bisect good c52881bbc22b50db99a6c37171ad3eea7d959ae6
# good: [f0f6d5c81be47d593e5ece7f06df6fba4c15738b] target/arm: Move the vfp
decodetree calls next to the base isa
git bisect good f0f6d5c81be47d593e5ece7f06df6fba4c15738b
# bad: [f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove
ARM_FEATURE_VFP*
git bisect bad f9506e162c33e87b609549157dd8431fcc732085
# good: [bfa8a370d2f5d4ed03f7a7e2987982f15fe73758] linux-user/arm: Replace
ARM_FEATURE_VFP* tests for HWCAP
git bisect good bfa8a370d2f5d4ed03f7a7e2987982f15fe73758
# first bad commit: [f9506e162c33e87b609549157dd8431fcc732085] target/arm:
Remove ARM_FEATURE_VFP*
the root cause is that, some feature bit is not consistent any more with
below changes in this commit:
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b29b0eddfc..05aa9711cd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1880,7 +1880,6 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <=
R_V7M_CSSELR_INDEX_MASK);
* mapping in linux-user/elfload.c:get_elf_hwcap().
*/
enum arm_features {
-ARM_FEATURE_VFP,
ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
@@ -1889,7 +1888,6 @@ enum arm_features {
ARM_FEATURE_V7,
ARM_FEATURE_THUMB2,
ARM_FEATURE_PMSA, /* no MMU; may
[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
Fix now in master: commit af903caed9fc62cc6
** Changed in: qemu
Status: New => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
Fix Committed
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad: [906b60facc3d3dd3af56cb1a7860175d805e10a3] target/arm: Add formats for
some vfp 2 and 3-register insns
git bisect bad 906b60facc3d3dd3af56cb1a7860175d805e10a3
# good: [c52881bbc22b50db99a6c37171ad3eea7d959ae6] target/arm: Replace
ARM_FEATURE_VFP4 with isar_feature_aa32_simdfmac
git bisect good c52881bbc22b50db99a6c37171ad3eea7d959ae6
# good: [f0f6d5c81be47d593e5ece7f06df6fba4c15738b] target/arm: Move the vfp
decodetree calls next to the base isa
git bisect good f0f6d5c81be47d593e5ece7f06df6fba4c15738b
# bad: [f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove
ARM_FEATURE_VFP*
git bisect bad f9506e162c33e87b609549157dd8431fcc732085
# good: [bfa8a370d2f5d4ed03f7a7e2987982f15fe73758] linux-user/arm: Replace
ARM_FEATURE_VFP* tests for HWCAP
git bisect good bfa8a370d2f5d4ed03f7a7e2987982f15fe73758
# first bad commit: [f9506e162c33e87b609549157dd8431fcc732085] target/arm:
Remove ARM_FEATURE_VFP*
the root cause is that, some feature bit is not consistent any more with
below changes in this commit:
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b29b0eddfc..05aa9711cd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1880,7 +1880,6 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <=
R_V7M_CSSELR_INDEX_MASK);
* mapping in linux-user/elfload.c:get_elf_hwcap().
*/
enum arm_features {
-ARM_FEATURE_VFP,
ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
@@ -1889,7 +1888,6 @@ enum arm_features {
ARM_FEATURE_V7,
ARM_FEATURE_THUMB2,
[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
https://patchew.org/QEMU/20210203161340.55210-1-aa...@os.amperecomputing.com/
works for me.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
New
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad: [906b60facc3d3dd3af56cb1a7860175d805e10a3] target/arm: Add formats for
some vfp 2 and 3-register insns
git bisect bad 906b60facc3d3dd3af56cb1a7860175d805e10a3
# good: [c52881bbc22b50db99a6c37171ad3eea7d959ae6] target/arm: Replace
ARM_FEATURE_VFP4 with isar_feature_aa32_simdfmac
git bisect good c52881bbc22b50db99a6c37171ad3eea7d959ae6
# good: [f0f6d5c81be47d593e5ece7f06df6fba4c15738b] target/arm: Move the vfp
decodetree calls next to the base isa
git bisect good f0f6d5c81be47d593e5ece7f06df6fba4c15738b
# bad: [f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove
ARM_FEATURE_VFP*
git bisect bad f9506e162c33e87b609549157dd8431fcc732085
# good: [bfa8a370d2f5d4ed03f7a7e2987982f15fe73758] linux-user/arm: Replace
ARM_FEATURE_VFP* tests for HWCAP
git bisect good bfa8a370d2f5d4ed03f7a7e2987982f15fe73758
# first bad commit: [f9506e162c33e87b609549157dd8431fcc732085] target/arm:
Remove ARM_FEATURE_VFP*
the root cause is that, some feature bit is not consistent any more with
below changes in this commit:
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b29b0eddfc..05aa9711cd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1880,7 +1880,6 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <=
R_V7M_CSSELR_INDEX_MASK);
* mapping in linux-user/elfload.c:get_elf_hwcap().
*/
enum arm_features {
-ARM_FEATURE_VFP,
ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
@@ -1889,7 +1888,6 @@ enum arm_features {
ARM_FEATURE_V7,
ARM_FEATURE_THUMB2,
ARM_FEATURE_PMSA,
[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
This just came up on the list the other day. It should be fixed by this patch:
https://patchew.org/QEMU/20210203161340.55210-1-aa...@os.amperecomputing.com/
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
New
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad: [906b60facc3d3dd3af56cb1a7860175d805e10a3] target/arm: Add formats for
some vfp 2 and 3-register insns
git bisect bad 906b60facc3d3dd3af56cb1a7860175d805e10a3
# good: [c52881bbc22b50db99a6c37171ad3eea7d959ae6] target/arm: Replace
ARM_FEATURE_VFP4 with isar_feature_aa32_simdfmac
git bisect good c52881bbc22b50db99a6c37171ad3eea7d959ae6
# good: [f0f6d5c81be47d593e5ece7f06df6fba4c15738b] target/arm: Move the vfp
decodetree calls next to the base isa
git bisect good f0f6d5c81be47d593e5ece7f06df6fba4c15738b
# bad: [f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove
ARM_FEATURE_VFP*
git bisect bad f9506e162c33e87b609549157dd8431fcc732085
# good: [bfa8a370d2f5d4ed03f7a7e2987982f15fe73758] linux-user/arm: Replace
ARM_FEATURE_VFP* tests for HWCAP
git bisect good bfa8a370d2f5d4ed03f7a7e2987982f15fe73758
# first bad commit: [f9506e162c33e87b609549157dd8431fcc732085] target/arm:
Remove ARM_FEATURE_VFP*
the root cause is that, some feature bit is not consistent any more with
below changes in this commit:
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b29b0eddfc..05aa9711cd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1880,7 +1880,6 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <=
R_V7M_CSSELR_INDEX_MASK);
* mapping in linux-user/elfload.c:get_elf_hwcap().
*/
enum arm_features {
-ARM_FEATURE_VFP,
ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
@@ -1889,7 +1888,6 @@ enum arm_features {
Re: [Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
On 2/5/21 5:52 PM, Claudio Fontana wrote: Hi LiZhiJian, just one thing I noticed in your call stack, your $Subject talks about AArch64, and you end up in arm_v7m_mmu_idx_for_secstate, which means that ARM_FEATURE_M is detected, so definitely something looks off when it comes to the feature bits.. That's true, so i guessboldly migration across this FBC are not trustable. the FBC changed the feature bits offset. Previously ARM_FEATURE = 11(source side), after this commit(destination side), it turned ARM_FEATURE = 9. Ciao, Claudio On 2/5/21 4:04 AM, lizhijian wrote: paste the call trace (gdb) bt #0 0xc036a02c in armv7m_nvic_neg_prio_requested (opaque=0x0, secure=false) at ../hw/intc/armv7m_nvic.c:406 #1 0xc014dcf4 in arm_v7m_mmu_idx_for_secstate_and_priv (env=0xca23d950, secstate=false, priv=true) at ../target/arm/m_helper.c:2837 #2 0xc014dd8c in arm_v7m_mmu_idx_for_secstate (env=0xca23d950, secstate=false) at ../target/arm/m_helper.c:2848 #3 0xc018aa6c in arm_mmu_idx_el (env=0xca23d950, el=1) at ../target/arm/helper.c:12841 #4 0xc018b788 in rebuild_hflags_internal (env=0xca23d950) at ../target/arm/helper.c:13100 #5 0xc018b80c in arm_rebuild_hflags (env=0xca23d950) at ../target/arm/helper.c:13113 #6 0xc007f928 in cpu_post_load (opaque=0xca233b10, version_id=22) at ../target/arm/machine.c:767 #7 0xbfc8f508 in vmstate_load_state (f=0xca355520, vmsd=0xc0d59ea8 , opaque=0xca233b10, version_id=22) at ../migration/vmstate.c:168 #8 0xbfca3404 in vmstate_load (f=0xca355520, se=0xca2708b0) at ../migration/savevm.c:885 #9 0xbfca6410 in qemu_loadvm_section_start_full (f=0xca355520, mis=0xca204d90) at ../migration/savevm.c:2396 #10 0xbfca6a8c in qemu_loadvm_state_main (f=0xca355520, mis=0xca204d90) at ../migration/savevm.c:2582 #11 0xbfca6c34 in qemu_loadvm_state (f=0xca355520) at ../migration/savevm.c:2661 #12 0xbfd95bf0 in process_incoming_migration_co (opaque=0x0) at ../migration/migration.c:522 #13 0xc06c6248 in coroutine_trampoline (i0=-895198224, i1=43690) at ../util/coroutine-ucontext.c:173 #14 0xa5071f90 in __startcontext () at ../sysdeps/unix/sysv/linux/aarch64/setcontext.S:123 ** Information type changed from Public to Public Security
Re: [Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
Hi LiZhiJian, just one thing I noticed in your call stack, your $Subject talks about AArch64, and you end up in arm_v7m_mmu_idx_for_secstate, which means that ARM_FEATURE_M is detected, so definitely something looks off when it comes to the feature bits.. Ciao, Claudio On 2/5/21 4:04 AM, lizhijian wrote: > paste the call trace > > (gdb) bt > #0 0xc036a02c in armv7m_nvic_neg_prio_requested (opaque=0x0, > secure=false) at ../hw/intc/armv7m_nvic.c:406 > #1 0xc014dcf4 in arm_v7m_mmu_idx_for_secstate_and_priv > (env=0xca23d950, secstate=false, priv=true) at > ../target/arm/m_helper.c:2837 > #2 0xc014dd8c in arm_v7m_mmu_idx_for_secstate (env=0xca23d950, > secstate=false) at ../target/arm/m_helper.c:2848 > #3 0xc018aa6c in arm_mmu_idx_el (env=0xca23d950, el=1) at > ../target/arm/helper.c:12841 > #4 0xc018b788 in rebuild_hflags_internal (env=0xca23d950) at > ../target/arm/helper.c:13100 > #5 0xc018b80c in arm_rebuild_hflags (env=0xca23d950) at > ../target/arm/helper.c:13113 > #6 0xc007f928 in cpu_post_load (opaque=0xca233b10, > version_id=22) at ../target/arm/machine.c:767 > #7 0xbfc8f508 in vmstate_load_state (f=0xca355520, > vmsd=0xc0d59ea8 , opaque=0xca233b10, version_id=22) > at ../migration/vmstate.c:168 > #8 0xbfca3404 in vmstate_load (f=0xca355520, se=0xca2708b0) > at ../migration/savevm.c:885 > #9 0xbfca6410 in qemu_loadvm_section_start_full (f=0xca355520, > mis=0xca204d90) at ../migration/savevm.c:2396 > #10 0xbfca6a8c in qemu_loadvm_state_main (f=0xca355520, > mis=0xca204d90) at ../migration/savevm.c:2582 > #11 0xbfca6c34 in qemu_loadvm_state (f=0xca355520) at > ../migration/savevm.c:2661 > #12 0xbfd95bf0 in process_incoming_migration_co (opaque=0x0) at > ../migration/migration.c:522 > #13 0xc06c6248 in coroutine_trampoline (i0=-895198224, i1=43690) at > ../util/coroutine-ucontext.c:173 > #14 0xa5071f90 in __startcontext () at > ../sysdeps/unix/sysv/linux/aarch64/setcontext.S:123 > > > ** Information type changed from Public to Public Security >
[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
i have no a good idea how to fix it prefectly yet.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
New
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad: [906b60facc3d3dd3af56cb1a7860175d805e10a3] target/arm: Add formats for
some vfp 2 and 3-register insns
git bisect bad 906b60facc3d3dd3af56cb1a7860175d805e10a3
# good: [c52881bbc22b50db99a6c37171ad3eea7d959ae6] target/arm: Replace
ARM_FEATURE_VFP4 with isar_feature_aa32_simdfmac
git bisect good c52881bbc22b50db99a6c37171ad3eea7d959ae6
# good: [f0f6d5c81be47d593e5ece7f06df6fba4c15738b] target/arm: Move the vfp
decodetree calls next to the base isa
git bisect good f0f6d5c81be47d593e5ece7f06df6fba4c15738b
# bad: [f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove
ARM_FEATURE_VFP*
git bisect bad f9506e162c33e87b609549157dd8431fcc732085
# good: [bfa8a370d2f5d4ed03f7a7e2987982f15fe73758] linux-user/arm: Replace
ARM_FEATURE_VFP* tests for HWCAP
git bisect good bfa8a370d2f5d4ed03f7a7e2987982f15fe73758
# first bad commit: [f9506e162c33e87b609549157dd8431fcc732085] target/arm:
Remove ARM_FEATURE_VFP*
the root cause is that, some feature bit is not consistent any more with
below changes in this commit:
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b29b0eddfc..05aa9711cd 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1880,7 +1880,6 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <=
R_V7M_CSSELR_INDEX_MASK);
* mapping in linux-user/elfload.c:get_elf_hwcap().
*/
enum arm_features {
-ARM_FEATURE_VFP,
ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
@@ -1889,7 +1888,6 @@ enum arm_features {
ARM_FEATURE_V7,
ARM_FEATURE_THUMB2,
ARM_FEATURE_PMSA, /* no MMU; may have Memory Protection
[Bug 1914696] Re: aarch64: migration failed: Segmentation fault (core dumped)
paste the call trace
(gdb) bt
#0 0xc036a02c in armv7m_nvic_neg_prio_requested (opaque=0x0,
secure=false) at ../hw/intc/armv7m_nvic.c:406
#1 0xc014dcf4 in arm_v7m_mmu_idx_for_secstate_and_priv
(env=0xca23d950, secstate=false, priv=true) at ../target/arm/m_helper.c:2837
#2 0xc014dd8c in arm_v7m_mmu_idx_for_secstate (env=0xca23d950,
secstate=false) at ../target/arm/m_helper.c:2848
#3 0xc018aa6c in arm_mmu_idx_el (env=0xca23d950, el=1) at
../target/arm/helper.c:12841
#4 0xc018b788 in rebuild_hflags_internal (env=0xca23d950) at
../target/arm/helper.c:13100
#5 0xc018b80c in arm_rebuild_hflags (env=0xca23d950) at
../target/arm/helper.c:13113
#6 0xc007f928 in cpu_post_load (opaque=0xca233b10, version_id=22)
at ../target/arm/machine.c:767
#7 0xbfc8f508 in vmstate_load_state (f=0xca355520,
vmsd=0xc0d59ea8 , opaque=0xca233b10, version_id=22) at
../migration/vmstate.c:168
#8 0xbfca3404 in vmstate_load (f=0xca355520, se=0xca2708b0) at
../migration/savevm.c:885
#9 0xbfca6410 in qemu_loadvm_section_start_full (f=0xca355520,
mis=0xca204d90) at ../migration/savevm.c:2396
#10 0xbfca6a8c in qemu_loadvm_state_main (f=0xca355520,
mis=0xca204d90) at ../migration/savevm.c:2582
#11 0xbfca6c34 in qemu_loadvm_state (f=0xca355520) at
../migration/savevm.c:2661
#12 0xbfd95bf0 in process_incoming_migration_co (opaque=0x0) at
../migration/migration.c:522
#13 0xc06c6248 in coroutine_trampoline (i0=-895198224, i1=43690) at
../util/coroutine-ucontext.c:173
#14 0xa5071f90 in __startcontext () at
../sysdeps/unix/sysv/linux/aarch64/setcontext.S:123
** Information type changed from Public to Public Security
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1914696
Title:
aarch64: migration failed: Segmentation fault (core dumped)
Status in QEMU:
New
Bug description:
reproduce:
arch: aarch64
source qemu: v4.2.0
destination qemu: 1ed9228f63ea4bcc0ae240365305ee264e9189ce
cmdline:
source:
$ ./aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1'
-machine virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024
-smp 2 -cpu 'host' -vnc :10 -enable-kvm -monitor stdio
(qemu)
(qemu) migrate -d tcp:10.19.241.167:888
(qemu) info status
VM status: paused (postmigrate)
destination:
./build/aarch64-softmmu/qemu-system-aarch64 -name 'avocado-vt-vm1' -machine
virt-4.2,gic-version=host,graphics=on -nodefaults -m 1024 -smp 2
-cpu 'host' -vnc :10 -enable-kvm -monitor stdio -incoming
tcp:0:888
QEMU 5.2.50 monitor - type 'help' for more information
(qemu) Segmentation fault (core dumped)
i have bisected and confirmed that the first bad commit is:
[f9506e162c33e87b609549157dd8431fcc732085] target/arm: Remove ARM_FEATURE_VFP*
bisect log:
git bisect log
# bad: [1ed9228f63ea4bcc0ae240365305ee264e9189ce] Merge remote-tracking
branch 'remotes/ericb/tags/pull-nbd-2021-02-02-v2' into staging
git bisect bad 1ed9228f63ea4bcc0ae240365305ee264e9189ce
# good: [b0ca999a43a22b38158a33d3f5881648bb4f] Update version for v4.2.0
release
git bisect good b0ca999a43a22b38158a33d3f5881648bb4f
# bad: [59093cc407cb044c72aa786006a07bd404eb36b9] hw/char: Convert the Ibex
UART to use the registerfields API
git bisect bad 59093cc407cb044c72aa786006a07bd404eb36b9
# bad: [4dabf39592e92d692c6f2a1633571114ae25d843] aspeed/smc: Fix DMA support
for AST2600
git bisect bad 4dabf39592e92d692c6f2a1633571114ae25d843
# good: [93c86fff53a267f657e79ec07dcd04b63882e330] Merge remote-tracking
branch 'remotes/pmaydell/tags/pull-target-arm-20200207' into staging
git bisect good 93c86fff53a267f657e79ec07dcd04b63882e330
# bad: [2ac031d171ccd18c973014d9978b4a63f0ad5fb0] Merge remote-tracking
branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging
git bisect bad 2ac031d171ccd18c973014d9978b4a63f0ad5fb0
# good: [4036b7d1cd9fb1097a5f4bc24d7d31744256260f] target/arm: Use
isar_feature function for testing AA32HPD feature
git bisect good 4036b7d1cd9fb1097a5f4bc24d7d31744256260f
# good: [002375895c10df40615fc615e2639f49e0c442fe] tests/iotests: be a little
more forgiving on the size test
git bisect good 002375895c10df40615fc615e2639f49e0c442fe
# good: [c695724868ce4049fd79c5a509880dbdf171e744] target/riscv: Emulate TIME
CSRs for privileged mode
git bisect good c695724868ce4049fd79c5a509880dbdf171e744
# good: [f67957e17cbf8fc3cc5d1146a2db2023404578b0] target/arm: Add
isar_feature_aa32_{fpsp_v2, fpsp_v3, fpdp_v3}
git bisect good f67957e17cbf8fc3cc5d1146a2db2023404578b0
# bad: [a1229109dec4375259d3fff99f362405aab7917a] target/arm: Implement
v8.4-RCPC
git bisect bad a1229109dec4375259d3fff99f362405aab7917a
# bad:
