From nobody Sat May 30 17:44:14 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=163.com ARC-Seal: i=1; a=rsa-sha256; t=1778552776; cv=none; d=zohomail.com; s=zohoarc; b=VTsld6XJ6oMk05sknbyRuPUfZZLf/Fv0WoNxenaE8d1Rzh4yP2uRAmOifODPjHQmOYxQmkKfeBk9ZiM/U2rMT6wkyApyuZS0Xymk+RWsNcb44jeGLhM4c1H9YMzaermtgKM9BpfIjBYkaWDSgHUeFETPMk8/Mysc260kHetYbCo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1778552776; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=tNvZjkPLtWPgkon/io+FpFV+gie2PZXSVNPlw/SVBsE=; b=NK8IDCWOTimwSrnQJQ/azg4goXwxF3Gvm3s+gpKiviS46z9gHraEe1LPYwE1kl3BhKRgRwU6TDIl+TXB/ULZepXmnPOBsGjr2MCRN2ZGTw/kj3hKnVX8mMQPPrU6m3nFwTm0Mfa/uo4azbd5zx/EOd0DzT5Ofcfcw+SywvjB0oo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 177855277610478.94837808566194; Mon, 11 May 2026 19:26:16 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wMcoy-0000ao-0P; Mon, 11 May 2026 22:26:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wMcov-0000WP-I0; Mon, 11 May 2026 22:26:06 -0400 Received: from m16.mail.163.com ([220.197.31.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wMcor-0007gX-Qy; Mon, 11 May 2026 22:26:05 -0400 Received: from thinkpadx13gen2i.. (unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wCntZKfjwJqqjd+Aw--.60433S3; Tue, 12 May 2026 10:25:48 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=tN vZjkPLtWPgkon/io+FpFV+gie2PZXSVNPlw/SVBsE=; b=Cua6r8oWV6cWiDGjMi 6RBDOafnI4fKm3RvnBAMuL+HJHedKxXEWS3H6C+vlMTp+HbNfVs8HgKC60Q4m8Pr 9LcX8AkhvHD+LErH3gIe4F8w6ntpnHA6//Zb9+rbmUHIz1hCMcvEVW9JH9H8WSBF XrxRnyb1m3LI8AKWYcyaxlfd8= From: Zongmin Zhou To: palmer@dabbelt.com, alistair.francis@wdc.com, liwei1518@gmail.com, daniel.barboza@oss.qualcomm.com, zhiwei_liu@linux.alibaba.com, chao.liu.zevorn@gmail.com Cc: qemu-riscv@nongnu.org, qemu-devel@nongnu.org, Zongmin Zhou Subject: [PATCH 1/2] target/riscv/kvm: add KVM support for Zicbop extension Date: Tue, 12 May 2026 10:25:19 +0800 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wCntZKfjwJqqjd+Aw--.60433S3 X-Coremail-Antispam: 1Uf129KBjvJXoWxXw17Wr4xZryUtFyrGr13CFg_yoW5trWUpr 47Cw45CFy5Zr17C3y3Xr1kXF1Sgw4kCa1kG39ag3W7XFW7KryIgryvka45AF4UtF1xZrs8 ZF1vgr4UCF4UJaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jzOJ5UUUUU= X-Originating-IP: [116.128.244.169] X-CM-SenderInfo: pplqsxxdorqiywtou0bp/xtbC8w0q1WoCj60f8wAA3n Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=220.197.31.5; envelope-from=min_halo@163.com; helo=m16.mail.163.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @163.com) X-ZM-MESSAGEID: 1778552778266154100 Content-Type: text/plain; charset="utf-8" From: Zongmin Zhou When the Zicbop extension is available expose it to the KVM guest. Also read and validate cbop_blocksize from the host via KVM interface. Signed-off-by: Zongmin Zhou --- target/riscv/kvm/kvm-cpu.c | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index b047ffa9c0..a46737f934 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -293,6 +293,7 @@ static void kvm_cpu_csr_set_u64(RISCVCPU *cpu, KVMCPUCo= nfig *csr_cfg, =20 static KVMCPUConfig kvm_multi_ext_cfgs[] =3D { KVM_EXT_CFG("zicbom", ext_zicbom, KVM_RISCV_ISA_EXT_ZICBOM), + KVM_EXT_CFG("zicbop", ext_zicbop, KVM_RISCV_ISA_EXT_ZICBOP), KVM_EXT_CFG("zicboz", ext_zicboz, KVM_RISCV_ISA_EXT_ZICBOZ), KVM_EXT_CFG("ziccrse", ext_ziccrse, KVM_RISCV_ISA_EXT_ZICCRSE), KVM_EXT_CFG("zicntr", ext_zicntr, KVM_RISCV_ISA_EXT_ZICNTR), @@ -439,6 +440,12 @@ static KVMCPUConfig kvm_cboz_blocksize =3D { .kvm_reg_id =3D KVM_REG_RISCV_CONFIG_REG(zicboz_block_size) }; =20 +static KVMCPUConfig kvm_cbop_blocksize =3D { + .name =3D "cbop_blocksize", + .offset =3D CPU_CFG_OFFSET(cbop_blocksize), + .kvm_reg_id =3D KVM_REG_RISCV_CONFIG_REG(zicbop_block_size) +}; + static KVMCPUConfig kvm_v_vlenb =3D { .name =3D "vlenb", .offset =3D CPU_CFG_OFFSET(vlenb), @@ -1114,6 +1121,10 @@ static void kvm_riscv_read_multiext_legacy(RISCVCPU = *cpu, kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cbom_blocksize); } =20 + if (cpu->cfg.ext_zicbop) { + kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cbop_blocksize); + } + if (cpu->cfg.ext_zicboz) { kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cboz_blocksize); } @@ -1293,6 +1304,10 @@ static void kvm_riscv_init_cfg(RISCVCPU *cpu, KVMScr= atchCPU *kvmcpu) kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cbom_blocksize); } =20 + if (cpu->cfg.ext_zicbop) { + kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cbop_blocksize); + } + if (cpu->cfg.ext_zicboz) { kvm_riscv_read_cbomz_blksize(cpu, kvmcpu, &kvm_cboz_blocksize); } @@ -2014,8 +2029,8 @@ void riscv_kvm_cpu_finalize_features(RISCVCPU *cpu, E= rror **errp) int ret; =20 /* short-circuit without spinning the scratch CPU */ - if (!cpu->cfg.ext_zicbom && !cpu->cfg.ext_zicboz && - !riscv_has_ext(env, RVV)) { + if (!cpu->cfg.ext_zicbom && !cpu->cfg.ext_zicbop && + !cpu->cfg.ext_zicboz && !riscv_has_ext(env, RVV)) { return; } =20 @@ -2062,6 +2077,25 @@ void riscv_kvm_cpu_finalize_features(RISCVCPU *cpu, = Error **errp) } } =20 + if (cpu->cfg.ext_zicbop && + riscv_cpu_option_set(kvm_cbop_blocksize.name)) { + + reg.id =3D KVM_RISCV_REG_ID_ULONG(KVM_REG_RISCV_CONFIG, + kvm_cbop_blocksize.kvm_reg_id); + reg.addr =3D (uint64_t)&val; + ret =3D ioctl(kvmcpu.cpufd, KVM_GET_ONE_REG, ®); + if (ret !=3D 0) { + error_setg_errno(errp, errno, "Unable to read cbop_blocksize"); + return; + } + + if (cpu->cfg.cbop_blocksize !=3D val) { + error_setg(errp, "Unable to set cbop_blocksize to a different " + "value than the host (%lu)", val); + return; + } + } + /* Users are setting vlen, not vlenb */ if (riscv_has_ext(env, RVV) && riscv_cpu_option_set("vlen")) { if (!kvm_v_vlenb.supported) { --=20 2.43.0 From nobody Sat May 30 17:44:14 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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(unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wCntZKfjwJqqjd+Aw--.60433S4; Tue, 12 May 2026 10:25:53 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=ce 4PpLUMY4BFOn/LQ59fll6U6Hm72hg6KGOZYpqqwR4=; b=G+xuGGmX8IpZ+XrDLY WRG65/KrAOTrfxvoSv07e4juvF/RpGlHisIECHOXiAuTPnlYJ5EZOAPXahrYz+mG 6vTEFiARbCjshPy7qCgjffZTsYlIdHX/cTnIIMemWucRct08yzXjlPPPufhKK3Iu ZppSNCsiBMitvK4qJjOQFMpx0= From: Zongmin Zhou To: palmer@dabbelt.com, alistair.francis@wdc.com, liwei1518@gmail.com, daniel.barboza@oss.qualcomm.com, zhiwei_liu@linux.alibaba.com, chao.liu.zevorn@gmail.com Cc: qemu-riscv@nongnu.org, qemu-devel@nongnu.org, Zongmin Zhou Subject: [PATCH 2/2] target/riscv/kvm: Add BFloat16 extensions support Date: Tue, 12 May 2026 10:25:20 +0800 Message-Id: <3930b7f89638ce3a89a2fc13051571fa860bed6f.1778551633.git.zhouzongmin@kylinos.cn> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wCntZKfjwJqqjd+Aw--.60433S4 X-Coremail-Antispam: 1Uf129KBjvJXoW7tFyUGw1xZF4ktr13JrWkJFb_yoW8WF4rpr 4xKFWfGrWkJ3s5ur48trZ8Gw1UXw40kw4kWwsF93W8J3yUGrWSvF98ta43Ca1DGa48KFyY vFn5urWvkw45X37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07j70edUUUUU= X-Originating-IP: [116.128.244.169] X-CM-SenderInfo: pplqsxxdorqiywtou0bp/xtbC8xEr1moCj7EgVAAA39 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=117.135.210.3; envelope-from=min_halo@163.com; helo=m16.mail.163.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @163.com) X-ZM-MESSAGEID: 1778552776621154100 Content-Type: text/plain; charset="utf-8" From: Zongmin Zhou Expose the BFloat16 extensions (Zfbfmin, Zvfbfmin, Zvfbfwma) to KVM guests when available in hardware. Signed-off-by: Zongmin Zhou Reviewed-by: Daniel Henrique Barboza --- target/riscv/kvm/kvm-cpu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index a46737f934..d732f5614a 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -309,6 +309,7 @@ static KVMCPUConfig kvm_multi_ext_cfgs[] =3D { KVM_EXT_CFG("zacas", ext_zacas, KVM_RISCV_ISA_EXT_ZACAS), KVM_EXT_CFG("zawrs", ext_zawrs, KVM_RISCV_ISA_EXT_ZAWRS), KVM_EXT_CFG("zfa", ext_zfa, KVM_RISCV_ISA_EXT_ZFA), + KVM_EXT_CFG("zfbfmin", ext_zfbfmin, KVM_RISCV_ISA_EXT_ZFBFMIN), KVM_EXT_CFG("zfh", ext_zfh, KVM_RISCV_ISA_EXT_ZFH), KVM_EXT_CFG("zfhmin", ext_zfhmin, KVM_RISCV_ISA_EXT_ZFHMIN), KVM_EXT_CFG("zba", ext_zba, KVM_RISCV_ISA_EXT_ZBA), @@ -334,6 +335,8 @@ static KVMCPUConfig kvm_multi_ext_cfgs[] =3D { KVM_EXT_CFG("zvbc", ext_zvbc, KVM_RISCV_ISA_EXT_ZVBC), KVM_EXT_CFG("zvfh", ext_zvfh, KVM_RISCV_ISA_EXT_ZVFH), KVM_EXT_CFG("zvfhmin", ext_zvfhmin, KVM_RISCV_ISA_EXT_ZVFHMIN), + KVM_EXT_CFG("zvfbfmin", ext_zvfbfmin, KVM_RISCV_ISA_EXT_ZVFBFMIN), + KVM_EXT_CFG("zvfbfwma", ext_zvfbfwma, KVM_RISCV_ISA_EXT_ZVFBFWMA), KVM_EXT_CFG("zvkb", ext_zvkb, KVM_RISCV_ISA_EXT_ZVKB), KVM_EXT_CFG("zvkg", ext_zvkg, KVM_RISCV_ISA_EXT_ZVKG), KVM_EXT_CFG("zvkned", ext_zvkned, KVM_RISCV_ISA_EXT_ZVKNED), --=20 2.43.0