Re: [PATCH v2 1/2] hw/riscv/virt.c: fix non-KVM --enable-debug build

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 30/8/23 15:35, Daniel Henrique Barboza wrote:
> A build with --enable-debug and without KVM will fail as follows:
> 
> /usr/bin/ld: libqemu-riscv64-softmmu.fa.p/hw_riscv_virt.c.o: in function `virt_machine_init':
> ./qemu/build/../hw/riscv/virt.c:1465: undefined reference to `kvm_riscv_aia_create'
> 
> This happens because the code block with "if virt_use_kvm_aia(s)" isn't
> being ignored by the debug build, resulting in an undefined reference to
> a KVM only function.
> 
> Add a 'kvm_enabled()' conditional together with virt_use_kvm_aia() will
> make the compiler crop the kvm_riscv_aia_create() call entirely from a
> non-KVM build. Note that adding the 'kvm_enabled()' conditional inside
> virt_use_kvm_aia() won't fix the build because this function would need
> to be inlined multiple times to make the compiler zero out the entire
> block.
> 
> While we're at it, use kvm_enabled() in all instances where
> virt_use_kvm_aia() is checked to allow the compiler to elide these other
> kvm-only instances as well.
> 
> Suggested-by: Richard Henderson <richard.henderson@linaro.org>
> Fixes: dbdb99948e ("target/riscv: select KVM AIA in riscv virt machine")
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
>   hw/riscv/virt.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)

Yay!

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>