From: Alexander Graf <agraf@suse.de>
To: Paul Mackerras <paulus@samba.org>, kvm-ppc@vger.kernel.org
Cc: kvm@vger.kernel.org, Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Subject: Re: [PATCH 2/5] KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI
Date: Thu, 20 Nov 2014 17:32:57 +0000 [thread overview]
Message-ID: <546E25C9.1050006@suse.de> (raw)
In-Reply-To: <1414990320-6378-3-git-send-email-paulus@samba.org>
On 03.11.14 05:51, Paul Mackerras wrote:
> From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
>
> When we get an HMI (hypervisor maintenance interrupt) while in a
> guest, we see that guest enters into paused state. The reason is, in
> kvmppc_handle_exit_hv it falls through default path and returns to
> host instead of resuming guest. This causes guest to enter into
> paused state. HMI is a hypervisor only interrupt and it is safe to
> resume the guest since the host has handled it already. This patch
> adds a switch case to resume the guest.
>
> Without this patch we see guest entering into paused state with following
> console messages:
>
> [ 3003.329351] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3003.329356] Error detail: Timer facility experienced an error
> [ 3003.329359] HMER: 0840000000000000
> [ 3003.329360] TFMR: 4a12000980a84000
> [ 3003.329366] vcpu c0000007c35094c0 (40):
> [ 3003.329368] pc = c0000000000c2ba0 msr = 8000000000009032 trap = e60
> [ 3003.329370] r 0 = c00000000021ddc0 r16 = 0000000000000046
> [ 3003.329372] r 1 = c00000007a02bbd0 r17 = 00003ffff27d5d98
> [ 3003.329375] r 2 = c0000000010980b8 r18 = 00001fffffc9a0b0
> [ 3003.329377] r 3 = c00000000142d6b8 r19 = c00000000142d6b8
> [ 3003.329379] r 4 = 0000000000000002 r20 = 0000000000000000
> [ 3003.329381] r 5 = c00000000524a110 r21 = 0000000000000000
> [ 3003.329383] r 6 = 0000000000000001 r22 = 0000000000000000
> [ 3003.329386] r 7 = 0000000000000000 r23 = c00000000524a110
> [ 3003.329388] r 8 = 0000000000000000 r24 = 0000000000000001
> [ 3003.329391] r 9 = 0000000000000001 r25 = c00000007c31da38
> [ 3003.329393] r10 = c0000000014280b8 r26 = 0000000000000002
> [ 3003.329395] r11 = 746f6f6c2f68656c r27 = c00000000524a110
> [ 3003.329397] r12 = 0000000028004484 r28 = c00000007c31da38
> [ 3003.329399] r13 = c00000000fe01400 r29 = 0000000000000002
> [ 3003.329401] r14 = 0000000000000046 r30 = c000000003011e00
> [ 3003.329403] r15 = ffffffffffffffba r31 = 0000000000000002
> [ 3003.329404] ctr = c00000000041a670 lr = c000000000272520
> [ 3003.329405] srr0 = c00000000007e8d8 srr1 = 9000000000001002
> [ 3003.329406] sprg0 = 0000000000000000 sprg1 = c00000000fe01400
> [ 3003.329407] sprg2 = c00000000fe01400 sprg3 = 0000000000000005
> [ 3003.329408] cr = 48004482 xer = 2000000000000000 dsisr = 42000000
> [ 3003.329409] dar = 0000010015020048
> [ 3003.329410] fault dar = 0000010015020048 dsisr = 42000000
> [ 3003.329411] SLB (8 entries):
> [ 3003.329412] ESID = c000000008000000 VSID = 40016e7779000510
> [ 3003.329413] ESID = d000000008000001 VSID = 400142add1000510
> [ 3003.329414] ESID = f000000008000004 VSID = 4000eb1a81000510
> [ 3003.329415] ESID = 00001f000800000b VSID = 40004fda0a000d90
> [ 3003.329416] ESID = 00003f000800000c VSID = 400039f536000d90
> [ 3003.329417] ESID = 000000001800000d VSID = 0001251b35150d90
> [ 3003.329417] ESID = 000001000800000e VSID = 4001e46090000d90
> [ 3003.329418] ESID = d000080008000019 VSID = 40013d349c000400
> [ 3003.329419] lpcr = c048800001847001 sdr1 = 0000001b19000006 last_inst = ffffffff
> [ 3003.329421] trap=0xe60 | pc=0xc0000000000c2ba0 | msr=0x8000000000009032
> [ 3003.329524] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3003.329526] Error detail: Timer facility experienced an error
> [ 3003.329527] HMER: 0840000000000000
> [ 3003.329527] TFMR: 4a12000980a94000
> [ 3006.359786] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3006.359792] Error detail: Timer facility experienced an error
> [ 3006.359795] HMER: 0840000000000000
> [ 3006.359797] TFMR: 4a12000980a84000
>
> Id Name State
> ----------------------------------------------------
> 2 guest2 running
> 3 guest3 paused
> 4 guest4 running
>
> Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Do we need this for PR running on bare metal as well?
Alex
WARNING: multiple messages have this Message-ID (diff)
From: Alexander Graf <agraf@suse.de>
To: Paul Mackerras <paulus@samba.org>, kvm-ppc@vger.kernel.org
Cc: kvm@vger.kernel.org, Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Subject: Re: [PATCH 2/5] KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI
Date: Thu, 20 Nov 2014 18:32:57 +0100 [thread overview]
Message-ID: <546E25C9.1050006@suse.de> (raw)
In-Reply-To: <1414990320-6378-3-git-send-email-paulus@samba.org>
On 03.11.14 05:51, Paul Mackerras wrote:
> From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
>
> When we get an HMI (hypervisor maintenance interrupt) while in a
> guest, we see that guest enters into paused state. The reason is, in
> kvmppc_handle_exit_hv it falls through default path and returns to
> host instead of resuming guest. This causes guest to enter into
> paused state. HMI is a hypervisor only interrupt and it is safe to
> resume the guest since the host has handled it already. This patch
> adds a switch case to resume the guest.
>
> Without this patch we see guest entering into paused state with following
> console messages:
>
> [ 3003.329351] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3003.329356] Error detail: Timer facility experienced an error
> [ 3003.329359] HMER: 0840000000000000
> [ 3003.329360] TFMR: 4a12000980a84000
> [ 3003.329366] vcpu c0000007c35094c0 (40):
> [ 3003.329368] pc = c0000000000c2ba0 msr = 8000000000009032 trap = e60
> [ 3003.329370] r 0 = c00000000021ddc0 r16 = 0000000000000046
> [ 3003.329372] r 1 = c00000007a02bbd0 r17 = 00003ffff27d5d98
> [ 3003.329375] r 2 = c0000000010980b8 r18 = 00001fffffc9a0b0
> [ 3003.329377] r 3 = c00000000142d6b8 r19 = c00000000142d6b8
> [ 3003.329379] r 4 = 0000000000000002 r20 = 0000000000000000
> [ 3003.329381] r 5 = c00000000524a110 r21 = 0000000000000000
> [ 3003.329383] r 6 = 0000000000000001 r22 = 0000000000000000
> [ 3003.329386] r 7 = 0000000000000000 r23 = c00000000524a110
> [ 3003.329388] r 8 = 0000000000000000 r24 = 0000000000000001
> [ 3003.329391] r 9 = 0000000000000001 r25 = c00000007c31da38
> [ 3003.329393] r10 = c0000000014280b8 r26 = 0000000000000002
> [ 3003.329395] r11 = 746f6f6c2f68656c r27 = c00000000524a110
> [ 3003.329397] r12 = 0000000028004484 r28 = c00000007c31da38
> [ 3003.329399] r13 = c00000000fe01400 r29 = 0000000000000002
> [ 3003.329401] r14 = 0000000000000046 r30 = c000000003011e00
> [ 3003.329403] r15 = ffffffffffffffba r31 = 0000000000000002
> [ 3003.329404] ctr = c00000000041a670 lr = c000000000272520
> [ 3003.329405] srr0 = c00000000007e8d8 srr1 = 9000000000001002
> [ 3003.329406] sprg0 = 0000000000000000 sprg1 = c00000000fe01400
> [ 3003.329407] sprg2 = c00000000fe01400 sprg3 = 0000000000000005
> [ 3003.329408] cr = 48004482 xer = 2000000000000000 dsisr = 42000000
> [ 3003.329409] dar = 0000010015020048
> [ 3003.329410] fault dar = 0000010015020048 dsisr = 42000000
> [ 3003.329411] SLB (8 entries):
> [ 3003.329412] ESID = c000000008000000 VSID = 40016e7779000510
> [ 3003.329413] ESID = d000000008000001 VSID = 400142add1000510
> [ 3003.329414] ESID = f000000008000004 VSID = 4000eb1a81000510
> [ 3003.329415] ESID = 00001f000800000b VSID = 40004fda0a000d90
> [ 3003.329416] ESID = 00003f000800000c VSID = 400039f536000d90
> [ 3003.329417] ESID = 000000001800000d VSID = 0001251b35150d90
> [ 3003.329417] ESID = 000001000800000e VSID = 4001e46090000d90
> [ 3003.329418] ESID = d000080008000019 VSID = 40013d349c000400
> [ 3003.329419] lpcr = c048800001847001 sdr1 = 0000001b19000006 last_inst = ffffffff
> [ 3003.329421] trap=0xe60 | pc=0xc0000000000c2ba0 | msr=0x8000000000009032
> [ 3003.329524] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3003.329526] Error detail: Timer facility experienced an error
> [ 3003.329527] HMER: 0840000000000000
> [ 3003.329527] TFMR: 4a12000980a94000
> [ 3006.359786] Severe Hypervisor Maintenance interrupt [Recovered]
> [ 3006.359792] Error detail: Timer facility experienced an error
> [ 3006.359795] HMER: 0840000000000000
> [ 3006.359797] TFMR: 4a12000980a84000
>
> Id Name State
> ----------------------------------------------------
> 2 guest2 running
> 3 guest3 paused
> 4 guest4 running
>
> Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Do we need this for PR running on bare metal as well?
Alex
next prev parent reply other threads:[~2014-11-20 17:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-03 4:51 [PATCH 0/5] Some fixes for HV KVM on PPC Paul Mackerras
2014-11-03 4:51 ` Paul Mackerras
2014-11-03 4:51 ` [PATCH 1/5] KVM: PPC: Book3S HV: Fix computation of tlbie operand Paul Mackerras
2014-11-03 4:51 ` Paul Mackerras
2014-11-03 5:59 ` Aneesh Kumar K.V
2014-11-03 6:11 ` Aneesh Kumar K.V
2014-11-03 6:29 ` Aneesh Kumar K.V
2014-11-03 6:41 ` Aneesh Kumar K.V
2014-11-03 4:51 ` [PATCH 2/5] KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI Paul Mackerras
2014-11-03 4:51 ` Paul Mackerras
2014-11-20 17:32 ` Alexander Graf [this message]
2014-11-20 17:32 ` Alexander Graf
2014-11-03 4:51 ` [PATCH 3/5] KVM: PPC: Book3S HV: Fix KSM memory corruption Paul Mackerras
2014-11-03 4:51 ` Paul Mackerras
2014-11-03 4:51 ` [PATCH 4/5] KVM: PPC: Book3S HV: Fix inaccuracies in ICP emulation for H_IPI Paul Mackerras
2014-11-03 4:51 ` Paul Mackerras
2014-11-03 4:52 ` [PATCH 5/5] KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked Paul Mackerras
2014-11-03 4:52 ` Paul Mackerras
2014-11-20 17:36 ` Alexander Graf
2014-11-20 17:36 ` Alexander Graf
2014-11-20 19:31 ` Suresh E. Warrier
2014-11-20 19:31 ` Suresh E. Warrier
2014-11-23 0:41 ` Alexander Graf
2014-11-23 0:41 ` Alexander Graf
2014-11-20 17:36 ` [PATCH 0/5] Some fixes for HV KVM on PPC Alexander Graf
2014-11-20 17:36 ` Alexander Graf
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