From 82a1273713df37375a75d6a700deef70c0d21360 Mon Sep 17 00:00:00 2001 From: "Jason J. Herne" Date: Tue, 2 Oct 2012 16:25:36 +0200 Subject: s390/kvm: Interrupt injection bugfix EXTERNAL_CALL and EMERGENCY type interrupts need to preserve their interrupt code parameter when being injected from user space. Signed-off-by: Jason J. Herne Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Marcelo Tosatti --- arch/s390/kvm/interrupt.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index ff1e2f8ef94a..c30615e605ac 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -629,10 +629,27 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, break; case KVM_S390_SIGP_STOP: case KVM_S390_RESTART: + VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); + inti->type = s390int->type; + break; case KVM_S390_INT_EXTERNAL_CALL: + if (s390int->parm & 0xffff0000) { + kfree(inti); + return -EINVAL; + } + VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", + s390int->parm); + inti->type = s390int->type; + inti->extcall.code = s390int->parm; + break; case KVM_S390_INT_EMERGENCY: - VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); + if (s390int->parm & 0xffff0000) { + kfree(inti); + return -EINVAL; + } + VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm); inti->type = s390int->type; + inti->emerg.code = s390int->parm; break; case KVM_S390_INT_VIRTIO: case KVM_S390_INT_SERVICE: -- cgit v1.2.3 From 87cac8f879a5ecd7109dbe688087e8810b3364eb Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 2 Oct 2012 16:25:38 +0200 Subject: s390/kvm: dont announce RRBM support Newer kernels (linux-next with the transparent huge page patches) use rrbm if the feature is announced via feature bit 66. RRBM will cause intercepts, so KVM does not handle it right now, causing an illegal instruction in the guest. The easy solution is to disable the feature bit for the guest. This fixes bugs like: Kernel BUG at 0000000000124c2a [verbose debug info unavailable] illegal operation: 0001 [#1] SMP Modules linked in: virtio_balloon virtio_net ipv6 autofs4 CPU: 0 Not tainted 3.5.4 #1 Process fmempig (pid: 659, task: 000000007b712fd0, ksp: 000000007bed3670) Krnl PSW : 0704d00180000000 0000000000124c2a (pmdp_clear_flush_young+0x5e/0x80) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 EA:3 00000000003cc000 0000000000000004 0000000000000000 0000000079800000 0000000000040000 0000000000000000 000000007bed3918 000000007cf40000 0000000000000001 000003fff7f00000 000003d281a94000 000000007bed383c 000000007bed3918 00000000005ecbf8 00000000002314a6 000000007bed36e0 Krnl Code:>0000000000124c2a: b9810025 ogr %r2,%r5 0000000000124c2e: 41343000 la %r3,0(%r4,%r3) 0000000000124c32: a716fffa brct %r1,124c26 0000000000124c36: b9010022 lngr %r2,%r2 0000000000124c3a: e3d0f0800004 lg %r13,128(%r15) 0000000000124c40: eb22003f000c srlg %r2,%r2,63 [ 2150.713198] Call Trace: [ 2150.713223] ([<00000000002312c4>] page_referenced_one+0x6c/0x27c) [ 2150.713749] [<0000000000233812>] page_referenced+0x32a/0x410 [...] CC: stable@vger.kernel.org CC: Alex Graf Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Marcelo Tosatti --- arch/s390/kvm/kvm-s390.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/s390') diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index ecced9d18986..38883f0bf27e 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -997,7 +997,7 @@ static int __init kvm_s390_init(void) } memcpy(facilities, S390_lowcore.stfle_fac_list, 16); facilities[0] &= 0xff00fff3f47c0000ULL; - facilities[1] &= 0x201c000000000000ULL; + facilities[1] &= 0x001c000000000000ULL; return 0; } -- cgit v1.2.3 From 42897d866b120547777ae1fd316680ec53356d9c Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Tue, 27 Nov 2012 23:29:02 -0200 Subject: KVM: x86: add kvm_arch_vcpu_postcreate callback, move TSC initialization TSC initialization will soon make use of online_vcpus. Signed-off-by: Marcelo Tosatti --- arch/s390/kvm/kvm-s390.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 38883f0bf27e..731ddeee32e4 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -355,6 +355,11 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); } +int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) +{ + return 0; +} + int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) { atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | -- cgit v1.2.3