Riscv64 KVM services SBI calls internally, so OpenSBI is not used in such
setups. Restrict the "-bios" flag accordingly. Thanks: Andrei, Drew.
Cc: Andrei Warkentin <andrei.warken...@intel.com>
Cc: Andrew Jones <ajo...@ventanamicro.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Sunil V L <suni...@ventanamicro.com>
Signed-off-by: Laszlo Ersek <ler...@redhat.com>
---
OvmfPkg/RiscVVirt/README.md | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/OvmfPkg/RiscVVirt/README.md b/OvmfPkg/RiscVVirt/README.md
index dbb40bbe89b0..193e4afe8dee 100644
--- a/OvmfPkg/RiscVVirt/README.md
+++ b/OvmfPkg/RiscVVirt/README.md
@@ -86,3 +86,8 @@ then specify that binary for QEMU, with the following
additional command line
option:
-bios $OPENSBI_DIR/build/platform/generic/firmware/fw_dynamic.bin
+
+Note that the above only makes a difference with software emulation (which you
+can force with `-M accel=tcg`). With hardware virtualization (`-M accel=kvm`),
+KVM services the SBI (Supervisor Binary Interface) calls internally, therefore
+any externally loaded OpenSBI binary is ignored.
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