Commit 4639b72f61a3 ("arm64: Add --vcpu-affinity command line argument")
introduced the --vcpu-affinity command line argument to pin the VCPUs to a
given list of physical CPUs. Unfortunately, the affinity is set only for an
arm64 guest, leading to the following error when running a 32-bit guest on
a system with two or more PMUs:
KVM exit reason: 9 ("KVM_EXIT_FAIL_ENTRY")
Registers:
PC: 0x8000c608
PSTATE: 0x200000d3
SP_EL1: 0x0
LR: 0x0
*pc:
0x8000c608: 25 3f a0 e1 83 61 a0 e1
0x8000c610: 83 31 98 e7 04 10 82 e1
0x8000c618: 07 2c 81 e3 28 10 1b e5
0x8000c620: 03 20 82 e3 03 00 a0 e1
*lr:
Warning: unable to translate guest address 0x0 to host
0x00000000: <unknown>
0x00000008: <unknown>
0x00000010: <unknown>
0x00000018: <unknown>
# KVM compatibility warning.
virtio-net device was not detected.
While you have requested a virtio-net device, the guest kernel did not initialize it.
Please make sure that the guest kernel was compiled with CONFIG_VIRTIO_NET=y enabled in .config.
# KVM session ended normally.
Make the error go away by setting the affinity of the VCPUs for both 32-bit
and 64-bit guests.
Fixes: 4639b72f61a3 ("arm64: Add --vcpu-affinity command line argument")
Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
---
arm/aarch64/kvm-cpu.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/arm/aarch64/kvm-cpu.c b/arm/aarch64/kvm-cpu.c
index 4ac0fafae06b..c8be10b3ca94 100644
--- a/arm/aarch64/kvm-cpu.c
+++ b/arm/aarch64/kvm-cpu.c
@@ -88,16 +88,7 @@ static void reset_vcpu_aarch64(struct kvm_cpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
struct kvm_one_reg reg;
- cpu_set_t *affinity;
u64 data;
- int ret;
-
- affinity = kvm->arch.vcpu_affinity_cpuset;
- if (affinity) {
- ret = sched_setaffinity(0, sizeof(cpu_set_t), affinity);
- if (ret == -1)
- die_perror("sched_setaffinity");
- }
reg.addr = (u64)&data;
@@ -179,7 +170,18 @@ int kvm_cpu__configure_features(struct kvm_cpu *vcpu)
void kvm_cpu__reset_vcpu(struct kvm_cpu *vcpu)
{
- if (vcpu->kvm->cfg.arch.aarch32_guest)
+ struct kvm *kvm = vcpu->kvm;
+ cpu_set_t *affinity;
+ int ret;
+
+ affinity = kvm->arch.vcpu_affinity_cpuset;
+ if (affinity) {
+ ret = sched_setaffinity(0, sizeof(cpu_set_t), affinity);
+ if (ret == -1)
+ die_perror("sched_setaffinity");
+ }
+
+ if (kvm->cfg.arch.aarch32_guest)
return reset_vcpu_aarch32(vcpu);
else
return reset_vcpu_aarch64(vcpu);
--
2.36.1
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