Re: [PATCH 3/3] KVM: selftests: Enable pre_fault_memory_test for RISC-V

[Sean Christopherson <seanjc@google.com>]

On Tue, Aug 11, 2026, Jinyu Tang wrote:
> RISC-V now supports KVM_PRE_FAULT_MEMORY, so include the generic
> pre_fault_memory_test in the RISC-V KVM selftest build.
> 
> The test uses PAGE_SIZE from the architecture processor header. Define
> the normal 4K RISC-V selftest page size so the generic test can build
> for RISC-V.
> 
> RISC-V selects VM_MODE_DEFAULT at runtime. Initialize the supported
> guest modes before creating the VM so the generic test can run on
> RISC-V hosts where the default mode is discovered from KVM
> capabilities.
> 
> Signed-off-by: Jinyu Tang <jinyu.tang@linux.dev>
> ---

...

> diff --git a/tools/testing/selftests/kvm/pre_fault_memory_test.c b/tools/testing/selftests/kvm/pre_fault_memory_test.c
> index a0fcae3cb7a8..6eebf0524673 100644
> --- a/tools/testing/selftests/kvm/pre_fault_memory_test.c
> +++ b/tools/testing/selftests/kvm/pre_fault_memory_test.c
> @@ -8,6 +8,7 @@
>  #include <linux/sizes.h>
>  
>  #include <test_util.h>
> +#include <guest_modes.h>
>  #include <kvm_util.h>
>  #include <processor.h>
>  #include <pthread.h>
> @@ -219,6 +220,8 @@ static void test_pre_fault_memory(unsigned long vm_type, bool private)
>  
>  int main(int argc, char *argv[])
>  {
> +	guest_modes_append_default();

Can we do this for all selftests in kvm_selftest_init()?  Or perhaps even better,
handle it in kvm_selftest_arch_init() to avoid the gnarly #ifdefs?

Unless there's a meaningful downside to configuring the supported and default
modes, I don't see any reason to force tests to manually do this work.

> +
>  	TEST_REQUIRE(kvm_check_cap(KVM_CAP_PRE_FAULT_MEMORY));
>  
>  	test_pre_fault_memory(0, false);
> -- 
> 2.43.0
>