Re: [PATCH v2 3/3] KVM: selftests: Enable pre_fault_memory_test for RISC-V

[Nutty.Liu]

On 8/12/2026 7:03 AM, 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.

Signed-off-by: Jinyu Tang <jinyu.t...@linux.dev>

Reviewed-by: Nutty Liu <nutty....@hotmail.com>

Thanks,
Nutty

---
v1 -> v2:
- Drop the per-test guest_modes_append_default() call from
   pre_fault_memory_test.c.  RISC-V already initializes supported and
   default guest modes from kvm_selftest_arch_init(), which is called by
   the common kvm_selftest_init() constructor, as suggested by Sean.

  tools/testing/selftests/kvm/Makefile.kvm              | 1 +
  tools/testing/selftests/kvm/include/riscv/processor.h | 3 +++
  2 files changed, 4 insertions(+)

diff --git a/tools/testing/selftests/kvm/Makefile.kvm 
b/tools/testing/selftests/kvm/Makefile.kvm
index 6fc34e9bf8e1..ac64ac92fd4b 100644
--- a/tools/testing/selftests/kvm/Makefile.kvm
+++ b/tools/testing/selftests/kvm/Makefile.kvm
@@ -225,6 +225,7 @@ TEST_GEN_PROGS_riscv += coalesced_io_test
  TEST_GEN_PROGS_riscv += dirty_log_perf_test
  TEST_GEN_PROGS_riscv += get-reg-list
  TEST_GEN_PROGS_riscv += mmu_stress_test
+TEST_GEN_PROGS_riscv += pre_fault_memory_test
  TEST_GEN_PROGS_riscv += rseq_test
  TEST_GEN_PROGS_riscv += steal_time

diff --git a/tools/testing/selftests/kvm/include/riscv/processor.h b/tools/testing/selftests/kvm/include/riscv/processor.h

index abde3c71c891..70487c8ed155 100644
--- a/tools/testing/selftests/kvm/include/riscv/processor.h
+++ b/tools/testing/selftests/kvm/include/riscv/processor.h
@@ -12,6 +12,9 @@
  #include <asm/vdso/processor.h>
  #include "kvm_util.h"

+#define PAGE_SHIFT 12

+#define PAGE_SIZE              BIT_ULL(PAGE_SHIFT)
+
  #define INSN_OPCODE_MASK      0x007c
  #define INSN_OPCODE_SHIFT     2
  #define INSN_OPCODE_SYSTEM    28