From: Quan Zhou Date: Fri, 8 Aug 2025 10:18:51 +0000 (+0800) Subject: RISC-V: KVM: Allow bfloat16 extension for Guest/VM X-Git-Tag: v6.18-rc1~95^2~4^2~22 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=44c3d084e4c8737cbef6fed262af21965d6adfb1;p=thirdparty%2Fkernel%2Flinux.git RISC-V: KVM: Allow bfloat16 extension for Guest/VM Extend the KVM ISA extension ONE_REG interface to allow KVM user space to detect and enable Zfbfmin/Zvfbfmin/Zvfbfwma extension for Guest/VM. Signed-off-by: Quan Zhou Reviewed-by: Andrew Jones Reviewed-by: Nutty Liu Reviewed-by: Nutty Liu Link: https://lore.kernel.org/r/f846cecd330ab9fc88211c55bc73126f903f8713.1754646071.git.zhouquan@iscas.ac.cn Signed-off-by: Anup Patel --- diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 821b008654969..d2ebc4d0be4b6 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -187,6 +187,9 @@ enum KVM_RISCV_ISA_EXT_ID { KVM_RISCV_ISA_EXT_ZAAMO, KVM_RISCV_ISA_EXT_ZALRSC, KVM_RISCV_ISA_EXT_ZICBOP, + KVM_RISCV_ISA_EXT_ZFBFMIN, + KVM_RISCV_ISA_EXT_ZVFBFMIN, + KVM_RISCV_ISA_EXT_ZVFBFWMA, KVM_RISCV_ISA_EXT_MAX, }; diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c index eefacf7809708..9f8b196e76979 100644 --- a/arch/riscv/kvm/vcpu_onereg.c +++ b/arch/riscv/kvm/vcpu_onereg.c @@ -65,6 +65,7 @@ static const unsigned long kvm_isa_ext_arr[] = { KVM_ISA_EXT_ARR(ZCF), KVM_ISA_EXT_ARR(ZCMOP), KVM_ISA_EXT_ARR(ZFA), + KVM_ISA_EXT_ARR(ZFBFMIN), KVM_ISA_EXT_ARR(ZFH), KVM_ISA_EXT_ARR(ZFHMIN), KVM_ISA_EXT_ARR(ZICBOM), @@ -89,6 +90,8 @@ static const unsigned long kvm_isa_ext_arr[] = { KVM_ISA_EXT_ARR(ZTSO), KVM_ISA_EXT_ARR(ZVBB), KVM_ISA_EXT_ARR(ZVBC), + KVM_ISA_EXT_ARR(ZVFBFMIN), + KVM_ISA_EXT_ARR(ZVFBFWMA), KVM_ISA_EXT_ARR(ZVFH), KVM_ISA_EXT_ARR(ZVFHMIN), KVM_ISA_EXT_ARR(ZVKB), @@ -199,6 +202,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext) case KVM_RISCV_ISA_EXT_ZCF: case KVM_RISCV_ISA_EXT_ZCMOP: case KVM_RISCV_ISA_EXT_ZFA: + case KVM_RISCV_ISA_EXT_ZFBFMIN: case KVM_RISCV_ISA_EXT_ZFH: case KVM_RISCV_ISA_EXT_ZFHMIN: case KVM_RISCV_ISA_EXT_ZICBOP: @@ -221,6 +225,8 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext) case KVM_RISCV_ISA_EXT_ZTSO: case KVM_RISCV_ISA_EXT_ZVBB: case KVM_RISCV_ISA_EXT_ZVBC: + case KVM_RISCV_ISA_EXT_ZVFBFMIN: + case KVM_RISCV_ISA_EXT_ZVFBFWMA: case KVM_RISCV_ISA_EXT_ZVFH: case KVM_RISCV_ISA_EXT_ZVFHMIN: case KVM_RISCV_ISA_EXT_ZVKB: