Re: [PATCH v2 2/2] e1000e: fix link state on resume
On 3/8/24 09:09, Jason Wang wrote: On Tue, Mar 5, 2024 at 6:07 PM Laurent Vivier wrote: On 2/1/24 06:45, Jason Wang wrote: On Wed, Jan 24, 2024 at 6:40 PM Laurent Vivier wrote: On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() that sets link_down to false, and thus activates the link even if we have disabled it. The problem can be reproduced starting qemu in paused state (-S) and then set the link to down. When we resume the machine the link appears to be up. Reproducer: # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S {"execute": "qmp_capabilities" } {"execute": "set_link", "arguments": {"name": "net0", "up": false}} {"execute": "cont" } To fix the problem, merge the content of e1000e_vm_state_change() into e1000e_core_post_load() as e1000 does. Buglink: https://issues.redhat.com/browse/RHEL-21867 Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") Suggested-by: Akihiko Odaki Signed-off-by: Laurent Vivier --- I've queued this. Ping? Thanks, Laurent This fail CI at: https://gitlab.com/jasowang/qemu/-/jobs/6348725267 It looks to me we can safely drop e1000e_autoneg_pause()? Thanks Yes, I'm going to send a new version of the patch. Thanks, Laurent
Re: [PATCH v2 2/2] e1000e: fix link state on resume
On Tue, Mar 5, 2024 at 6:07 PM Laurent Vivier wrote: > > On 2/1/24 06:45, Jason Wang wrote: > > On Wed, Jan 24, 2024 at 6:40 PM Laurent Vivier wrote: > >> > >> On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() > >> that sets link_down to false, and thus activates the link even > >> if we have disabled it. > >> > >> The problem can be reproduced starting qemu in paused state (-S) and > >> then set the link to down. When we resume the machine the link appears > >> to be up. > >> > >> Reproducer: > >> > >> # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S > >> > >> {"execute": "qmp_capabilities" } > >> {"execute": "set_link", "arguments": {"name": "net0", "up": false}} > >> {"execute": "cont" } > >> > >> To fix the problem, merge the content of e1000e_vm_state_change() > >> into e1000e_core_post_load() as e1000 does. > >> > >> Buglink: https://issues.redhat.com/browse/RHEL-21867 > >> Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") > >> Suggested-by: Akihiko Odaki > >> Signed-off-by: Laurent Vivier > >> --- > >> > > > > I've queued this. > > Ping? > > Thanks, > Laurent > This fail CI at: https://gitlab.com/jasowang/qemu/-/jobs/6348725267 It looks to me we can safely drop e1000e_autoneg_pause()? Thanks
Re: [PATCH v2 2/2] e1000e: fix link state on resume
Hi Laurent: On Tue, Mar 5, 2024 at 6:07 PM Laurent Vivier wrote: > > On 2/1/24 06:45, Jason Wang wrote: > > On Wed, Jan 24, 2024 at 6:40 PM Laurent Vivier wrote: > >> > >> On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() > >> that sets link_down to false, and thus activates the link even > >> if we have disabled it. > >> > >> The problem can be reproduced starting qemu in paused state (-S) and > >> then set the link to down. When we resume the machine the link appears > >> to be up. > >> > >> Reproducer: > >> > >> # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S > >> > >> {"execute": "qmp_capabilities" } > >> {"execute": "set_link", "arguments": {"name": "net0", "up": false}} > >> {"execute": "cont" } > >> > >> To fix the problem, merge the content of e1000e_vm_state_change() > >> into e1000e_core_post_load() as e1000 does. > >> > >> Buglink: https://issues.redhat.com/browse/RHEL-21867 > >> Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") > >> Suggested-by: Akihiko Odaki > >> Signed-off-by: Laurent Vivier > >> --- > >> > > > > I've queued this. > > Ping? Plan to send a pull request with this by the end of this week. Thanks > > Thanks, > Laurent >
Re: [PATCH v2 2/2] e1000e: fix link state on resume
On 2/1/24 06:45, Jason Wang wrote: On Wed, Jan 24, 2024 at 6:40 PM Laurent Vivier wrote: On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() that sets link_down to false, and thus activates the link even if we have disabled it. The problem can be reproduced starting qemu in paused state (-S) and then set the link to down. When we resume the machine the link appears to be up. Reproducer: # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S {"execute": "qmp_capabilities" } {"execute": "set_link", "arguments": {"name": "net0", "up": false}} {"execute": "cont" } To fix the problem, merge the content of e1000e_vm_state_change() into e1000e_core_post_load() as e1000 does. Buglink: https://issues.redhat.com/browse/RHEL-21867 Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") Suggested-by: Akihiko Odaki Signed-off-by: Laurent Vivier --- I've queued this. Ping? Thanks, Laurent
Re: [PATCH v2 2/2] e1000e: fix link state on resume
On Wed, Jan 24, 2024 at 6:40 PM Laurent Vivier wrote: > > On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() > that sets link_down to false, and thus activates the link even > if we have disabled it. > > The problem can be reproduced starting qemu in paused state (-S) and > then set the link to down. When we resume the machine the link appears > to be up. > > Reproducer: > ># qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S > >{"execute": "qmp_capabilities" } >{"execute": "set_link", "arguments": {"name": "net0", "up": false}} >{"execute": "cont" } > > To fix the problem, merge the content of e1000e_vm_state_change() > into e1000e_core_post_load() as e1000 does. > > Buglink: https://issues.redhat.com/browse/RHEL-21867 > Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") > Suggested-by: Akihiko Odaki > Signed-off-by: Laurent Vivier > --- > I've queued this. Thanks
Re: [PATCH v2 2/2] e1000e: fix link state on resume
On 2024/01/24 19:40, Laurent Vivier wrote: On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() that sets link_down to false, and thus activates the link even if we have disabled it. The problem can be reproduced starting qemu in paused state (-S) and then set the link to down. When we resume the machine the link appears to be up. Reproducer: # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S {"execute": "qmp_capabilities" } {"execute": "set_link", "arguments": {"name": "net0", "up": false}} {"execute": "cont" } To fix the problem, merge the content of e1000e_vm_state_change() into e1000e_core_post_load() as e1000 does. Buglink: https://issues.redhat.com/browse/RHEL-21867 Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") Suggested-by: Akihiko Odaki Signed-off-by: Laurent Vivier --- Notes: v2: Add Fixes: and a comment about e1000e_intrmgr_resume() purpose. Thanks for taking care of this. Reviewed-by: Akihiko Odaki
[PATCH v2 2/2] e1000e: fix link state on resume
On resume e1000e_vm_state_change() always calls e1000e_autoneg_resume() that sets link_down to false, and thus activates the link even if we have disabled it. The problem can be reproduced starting qemu in paused state (-S) and then set the link to down. When we resume the machine the link appears to be up. Reproducer: # qemu-system-x86_64 ... -device e1000e,netdev=netdev0,id=net0 -S {"execute": "qmp_capabilities" } {"execute": "set_link", "arguments": {"name": "net0", "up": false}} {"execute": "cont" } To fix the problem, merge the content of e1000e_vm_state_change() into e1000e_core_post_load() as e1000 does. Buglink: https://issues.redhat.com/browse/RHEL-21867 Fixes: 6f3fbe4ed06a ("net: Introduce e1000e device emulation") Suggested-by: Akihiko Odaki Signed-off-by: Laurent Vivier --- Notes: v2: Add Fixes: and a comment about e1000e_intrmgr_resume() purpose. hw/net/e1000e_core.c | 54 ++-- hw/net/e1000e_core.h | 2 -- 2 files changed, 7 insertions(+), 49 deletions(-) diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c index e324c02dd589..ac8d4bb2433a 100644 --- a/hw/net/e1000e_core.c +++ b/hw/net/e1000e_core.c @@ -123,14 +123,6 @@ e1000e_intmgr_timer_resume(E1000IntrDelayTimer *timer) } } -static void -e1000e_intmgr_timer_pause(E1000IntrDelayTimer *timer) -{ -if (timer->running) { -timer_del(timer->timer); -} -} - static inline void e1000e_intrmgr_stop_timer(E1000IntrDelayTimer *timer) { @@ -398,24 +390,6 @@ e1000e_intrmgr_resume(E1000ECore *core) } } -static void -e1000e_intrmgr_pause(E1000ECore *core) -{ -int i; - -e1000e_intmgr_timer_pause(>radv); -e1000e_intmgr_timer_pause(>rdtr); -e1000e_intmgr_timer_pause(>raid); -e1000e_intmgr_timer_pause(>tidv); -e1000e_intmgr_timer_pause(>tadv); - -e1000e_intmgr_timer_pause(>itr); - -for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) { -e1000e_intmgr_timer_pause(>eitr[i]); -} -} - static void e1000e_intrmgr_reset(E1000ECore *core) { @@ -3351,22 +3325,6 @@ e1000e_autoneg_resume(E1000ECore *core) } } -static void -e1000e_vm_state_change(void *opaque, bool running, RunState state) -{ -E1000ECore *core = opaque; - -if (running) { -trace_e1000e_vm_state_running(); -e1000e_intrmgr_resume(core); -e1000e_autoneg_resume(core); -} else { -trace_e1000e_vm_state_stopped(); -e1000e_autoneg_pause(core); -e1000e_intrmgr_pause(core); -} -} - void e1000e_core_pci_realize(E1000ECore *core, const uint16_t *eeprom_templ, @@ -3379,9 +3337,6 @@ e1000e_core_pci_realize(E1000ECore *core, e1000e_autoneg_timer, core); e1000e_intrmgr_pci_realize(core); -core->vmstate = -qemu_add_vm_change_state_handler(e1000e_vm_state_change, core); - for (i = 0; i < E1000E_NUM_QUEUES; i++) { net_tx_pkt_init(>tx[i].tx_pkt, E1000E_MAX_TX_FRAGS); } @@ -3405,8 +3360,6 @@ e1000e_core_pci_uninit(E1000ECore *core) e1000e_intrmgr_pci_unint(core); -qemu_del_vm_change_state_handler(core->vmstate); - for (i = 0; i < E1000E_NUM_QUEUES; i++) { net_tx_pkt_uninit(core->tx[i].tx_pkt); } @@ -3576,5 +3529,12 @@ e1000e_core_post_load(E1000ECore *core) */ nc->link_down = (core->mac[STATUS] & E1000_STATUS_LU) == 0; +/* + * we need to restart intrmgr timers, as an older version of + * QEMU can have stopped them before migration + */ +e1000e_intrmgr_resume(core); +e1000e_autoneg_resume(core); + return 0; } diff --git a/hw/net/e1000e_core.h b/hw/net/e1000e_core.h index 66b025cc43f1..01510ca78b47 100644 --- a/hw/net/e1000e_core.h +++ b/hw/net/e1000e_core.h @@ -98,8 +98,6 @@ struct E1000Core { E1000IntrDelayTimer eitr[E1000E_MSIX_VEC_NUM]; -VMChangeStateEntry *vmstate; - uint32_t itr_guest_value; uint32_t eitr_guest_value[E1000E_MSIX_VEC_NUM]; -- 2.43.0