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| author | Sean Christopherson <seanjc@google.com> | 2022-12-19 22:04:16 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-12-23 12:16:09 -0500 |
| commit | 53800f88d414525d3fdc5c84629faa0b6bc35b3b (patch) | |
| tree | 2bff3028ec0302026c5b9c81c661eb0e1a0f4872 /tools/testing | |
| parent | 77b1908e10eccf34310ffd95b0b455c01aa76286 (diff) | |
| download | linux-stable-53800f88d414525d3fdc5c84629faa0b6bc35b3b.tar.gz linux-stable-53800f88d414525d3fdc5c84629faa0b6bc35b3b.tar.bz2 linux-stable-53800f88d414525d3fdc5c84629faa0b6bc35b3b.zip | |
KVM: selftests: Zero out valid_bank_mask for "all" case in Hyper-V IPI test
Zero out the valid_bank_mask when using the fast variant of
HVCALL_SEND_IPI_EX to send IPIs to all vCPUs. KVM requires the "var_cnt"
and "valid_bank_mask" inputs to be consistent even when targeting all
vCPUs. See commit bd1ba5732bb9 ("KVM: x86: Get the number of Hyper-V
sparse banks from the VARHEAD field").
Fixes: 998489245d84 ("KVM: selftests: Hyper-V PV IPI selftest")
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221219220416.395329-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/hyperv_ipi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c index 8b791eac7d5a..0cbb0e646ef8 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_ipi.c @@ -193,8 +193,9 @@ static void sender_guest_code(void *hcall_page, vm_vaddr_t pgs_gpa) GUEST_SYNC(stage++); /* * 'XMM Fast' HvCallSendSyntheticClusterIpiEx to HV_GENERIC_SET_ALL. - * Nothing to write anything to XMM regs. */ + ipi_ex->vp_set.valid_bank_mask = 0; + hyperv_write_xmm_input(&ipi_ex->vp_set.valid_bank_mask, 2); hyperv_hypercall(HVCALL_SEND_IPI_EX | HV_HYPERCALL_FAST_BIT, IPI_VECTOR, HV_GENERIC_SET_ALL); nop_loop(); |