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* [PATCH] RISC-V: KVM: fix the Zicbo[m|z|p] block sizes in GET_ONE_REG
@ 2026-09-24  8:10 Yong-Xuan Wang
  0 siblings, 0 replies; only message in thread
From: Yong-Xuan Wang @ 2026-09-24  8:10 UTC (permalink / raw)
  To: Anup Patel, Atish Patra, Paul Walmsley, Palmer Dabbelt,
	Albert Ou, Alexandre Ghiti
  Cc: greentime.hu, vincent.chen, zong.li, Anup Patel, kvm, kvm-riscv,
	linux-riscv, linux-kernel, Yong-Xuan Wang

The kvm_riscv_vcpu_get_reg_config() should return the block size when
the host supports the corresponding extensions.

Fixes: 298276da73ca ("RISC-V: KVM: Zicbo[m|z|p] block sizes should be always present in ONE_REG")
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
---
 arch/riscv/kvm/vcpu_onereg.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 877ba823fc74..f2b125569449 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -50,13 +50,13 @@ static int kvm_riscv_vcpu_get_reg_config(struct kvm_vcpu *vcpu,
 		reg_val = vcpu->arch.isa[0] & KVM_RISCV_BASE_ISA_MASK;
 		break;
 	case KVM_REG_RISCV_CONFIG_REG(zicbom_block_size):
-		reg_val = (kvm_riscv_isa_check_host(ZICBOM)) ? 0 : riscv_cbom_block_size;
+		reg_val = (kvm_riscv_isa_check_host(ZICBOM)) ? riscv_cbom_block_size : 0;
 		break;
 	case KVM_REG_RISCV_CONFIG_REG(zicboz_block_size):
-		reg_val = (kvm_riscv_isa_check_host(ZICBOZ)) ? 0 : riscv_cboz_block_size;
+		reg_val = (kvm_riscv_isa_check_host(ZICBOZ)) ? riscv_cboz_block_size : 0;
 		break;
 	case KVM_REG_RISCV_CONFIG_REG(zicbop_block_size):
-		reg_val = (kvm_riscv_isa_check_host(ZICBOP)) ? 0 : riscv_cbop_block_size;
+		reg_val = (kvm_riscv_isa_check_host(ZICBOP)) ? riscv_cbop_block_size : 0;
 		break;
 	case KVM_REG_RISCV_CONFIG_REG(mvendorid):
 		reg_val = vcpu->arch.mvendorid;

---
base-commit: b5060a4aa33d7d78a8c1837ab08ef0c81ea96650
change-id: 20260924-kvm_fix_cbosize-1bf2cdd282cb


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