From: Ricardo Koller ricarkol@google.com

[ Upstream commit cc94d47ce16d4147d546e47c8248e8bd12ba5fe5 ]

The val argument in gicv3_access_reg can have any value when used for a read, not necessarily 0. Fix the assert by checking val only for writes.

Signed-off-by: Ricardo Koller ricarkol@google.com Reported-by: Reiji Watanabe reijiw@google.com Cc: Andrew Jones drjones@redhat.com Reviewed-by: Andrew Jones drjones@redhat.com Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20220127030858.3269036-2-ricarkol@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/kvm/lib/aarch64/gic_v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c index 00f613c0583c..e4945fe66620 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c +++ b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c @@ -159,7 +159,7 @@ static void gicv3_access_reg(uint32_t intid, uint64_t offset, uint32_t cpu_or_dist;

GUEST_ASSERT(bits_per_field <= reg_bits); - GUEST_ASSERT(*val < (1U << bits_per_field)); + GUEST_ASSERT(!write || *val < (1U << bits_per_field)); /* Some registers like IROUTER are 64 bit long. Those are currently not * supported by readl nor writel, so just asserting here until then. */