[kvmtool PATCH v3 4/4] riscv: Correct number of hart bits

Anup Patel
2024-08-21T14:27:00Z

From: Andrew Jones <ajones@ventanamicro.com>

The number of hart bits should be obtained from the highest hart ID,
not the number of harts. For example, if a guest has 2 harts, then
the number of bits should be fls(1) == 1.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
riscv/aia.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/riscv/aia.c b/riscv/aia.c
index fe9399a..21d9704 100644
--- a/riscv/aia.c
+++ b/riscv/aia.c
@@ -164,7 +164,7 @@ static int aia__init(struct kvm *kvm)
ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_nr_sources_attr);
if (ret)
return ret;
- aia_hart_bits = fls_long(kvm->nrcpus);
+ aia_hart_bits = fls_long(kvm->nrcpus - 1);
ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_hart_bits_attr);
if (ret)
return ret;
--
2.34.1