diff options
| author | Rohan McLure <rmclure@linux.ibm.com> | 2023-05-10 13:31:14 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-21 15:13:57 +1000 |
| commit | 86dacd967b80114c0c6cf0648ed1dcaea8853937 (patch) | |
| tree | aea48d9896acd0413c549d21c2a4a4108dad6b83 /arch/powerpc/kvm/book3s_hv_builtin.c | |
| parent | 8608f14b49a0a3f8644a326d32dc1bf7ed78836a (diff) | |
powerpc: Mark writes registering ipi to host cpu through kvm and polling
Mark writes to hypervisor ipi state so that KCSAN recognises these
asynchronous issue of kvmppc_{set,clear}_host_ipi to be intended, with
atomic writes. Mark asynchronous polls to this variable in
kvm_ppc_read_one_intr().
Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230510033117.1395895-9-rmclure@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_builtin.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_builtin.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index da85f046377a..0f5b021fa559 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -406,7 +406,7 @@ static long kvmppc_read_one_intr(bool *again) return 1; /* see if a host IPI is pending */ - host_ipi = local_paca->kvm_hstate.host_ipi; + host_ipi = READ_ONCE(local_paca->kvm_hstate.host_ipi); if (host_ipi) return 1; @@ -466,7 +466,7 @@ static long kvmppc_read_one_intr(bool *again) * meantime. If it's clear, we bounce the interrupt to the * guest */ - host_ipi = local_paca->kvm_hstate.host_ipi; + host_ipi = READ_ONCE(local_paca->kvm_hstate.host_ipi); if (unlikely(host_ipi != 0)) { /* We raced with the host, * we need to resend that IPI, bummer |