From 7050f1d79f1cfaf0de577995df412855de23f752 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Fri, 17 Oct 2025 21:29:24 +0530 Subject: [PATCH] RISC-V: KVM: Add SBI MPXY extension support for Guest The SBI MPXY extension is a platform-level functionality so KVM only needs to forward SBI MPXY calls to KVM user-space. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20251017155925.361560-4-apatel@ventanamicro.com Signed-off-by: Anup Patel --- arch/riscv/include/asm/kvm_vcpu_sbi.h | 1 + arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kvm/vcpu_sbi.c | 4 ++++ arch/riscv/kvm/vcpu_sbi_forward.c | 7 +++++++ 4 files changed, 13 insertions(+) diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h index 446f4a8eb3cd0..c1a7e3b40d9ce 100644 --- a/arch/riscv/include/asm/kvm_vcpu_sbi.h +++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h @@ -107,6 +107,7 @@ extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_susp; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_fwft; +extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_mpxy; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 759a4852c09a5..37213d86c0d14 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -211,6 +211,7 @@ enum KVM_RISCV_SBI_EXT_ID { KVM_RISCV_SBI_EXT_STA, KVM_RISCV_SBI_EXT_SUSP, KVM_RISCV_SBI_EXT_FWFT, + KVM_RISCV_SBI_EXT_MPXY, KVM_RISCV_SBI_EXT_MAX, }; diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c index fd4106c276d80..46ab7b989432b 100644 --- a/arch/riscv/kvm/vcpu_sbi.c +++ b/arch/riscv/kvm/vcpu_sbi.c @@ -82,6 +82,10 @@ static const struct kvm_riscv_sbi_extension_entry sbi_ext[] = { .ext_idx = KVM_RISCV_SBI_EXT_FWFT, .ext_ptr = &vcpu_sbi_ext_fwft, }, + { + .ext_idx = KVM_RISCV_SBI_EXT_MPXY, + .ext_ptr = &vcpu_sbi_ext_mpxy, + }, { .ext_idx = KVM_RISCV_SBI_EXT_EXPERIMENTAL, .ext_ptr = &vcpu_sbi_ext_experimental, diff --git a/arch/riscv/kvm/vcpu_sbi_forward.c b/arch/riscv/kvm/vcpu_sbi_forward.c index dbfa70c2c7756..5a3c75eb23c5a 100644 --- a/arch/riscv/kvm/vcpu_sbi_forward.c +++ b/arch/riscv/kvm/vcpu_sbi_forward.c @@ -25,3 +25,10 @@ const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn = { .default_disabled = true, .handler = kvm_riscv_vcpu_sbi_forward_handler, }; + +const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_mpxy = { + .extid_start = SBI_EXT_MPXY, + .extid_end = SBI_EXT_MPXY, + .default_disabled = true, + .handler = kvm_riscv_vcpu_sbi_forward_handler, +}; -- 2.47.3