From nobody Sat May 30 17:44:04 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=1778655840; cv=none; d=zohomail.com; s=zohoarc; b=Hw4btgOCo9SglQFw5xDyD6Mpk1fFPz7DT6GBptZAzF4iweBsI0arvWrND4un9qEsHvqOmsoeRLipbYEXB238dZGkUVPhyWnmM1o/pGR0UVD5ClCv0T10OCDqNSENmgZ6pL7Qfvbp/6a7ERCFd/tOAHZP/WRA8ushFrFEh9aXID0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1778655840; 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=BH/Yr+TG6j/hB7YkphAQl0VNju0qXFtUgKtpbE7KB04=; b=Gyndur4KIAoW8r1YyukWtLDbKfEkK2Wt1VYerCxIvWxIrdL8E4e9YHLFhbVPaTJRo0vT7glhCNq09e+UK8C4J83Paw3abqZJfc7dFp3wS1Pm4ZxeLh6vgjncLSHjymp2a+2mnnYikxULL9cSZ/7ksJ81wGOrzXB83HfAeaDIUbI= 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 1778655840287888.810208253234; Wed, 13 May 2026 00:04:00 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wN3ci-0004mv-RA; Wed, 13 May 2026 03:03:16 -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 1wN3ch-0004mT-1E; Wed, 13 May 2026 03:03:15 -0400 Received: from m16.mail.163.com ([117.135.210.4]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wN3ca-0006lt-SD; Wed, 13 May 2026 03:03:14 -0400 Received: from thinkpadx13gen2i.. (unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wDXD0f+IQRqW951BA--.20095S3; Wed, 13 May 2026 15:02:34 +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=BH /Yr+TG6j/hB7YkphAQl0VNju0qXFtUgKtpbE7KB04=; b=TVnRNp5Euz0hPVOUxn JjOKrjsV4Nl8ye6PmHl7QO8rw1A7BgOdhMVL4s77/K4jT4X54yGBJFM8d4Em7Zxc TTMhohHLU7Wyg76/Bfii2QrAh5BAuy4fPRhAcUfU9NWFJAIxDPALGjqn+v9A1Zoi phF0FwXNI/fHdScwiEQ/c9OKc= From: Zongmin Zhou To: daniel.barboza@oss.qualcomm.com, alistair.francis@wdc.com, chao.liu.zevorn@gmail.com, liwei1518@gmail.com, palmer@dabbelt.com, zhiwei_liu@linux.alibaba.com Cc: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, Zongmin Zhou Subject: [PATCH v2 1/2] target/riscv/kvm: add KVM support for Zicbop extension Date: Wed, 13 May 2026 15:02:10 +0800 Message-Id: <9e388aa9984ea9d3d0c85e1630c9195023938952.1778653159.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: _____wDXD0f+IQRqW951BA--.20095S3 X-Coremail-Antispam: 1Uf129KBjvJXoWxXw17Wr43tFWDAw45Zr1UWrg_yoW5ZF1Upr 47Cw45CFyUZr13C3yfXr1kXF1Sgw4kCa1kG39293W7XF47CrWIgryvya45AF4UtF1fZrs8 ZF1vgr48ur4UJFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07U_DGOUUUUU= X-Originating-IP: [116.128.244.169] X-CM-SenderInfo: pplqsxxdorqiywtou0bp/xtbC0gsm0WoEIgt0qwAA32 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=117.135.210.4; 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_H3=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: 1778655841327158500 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 Reviewed-by: Daniel Henrique Barboza --- Changes in v2: - Removed Zicbop from legacy KVM extension reading path since the extension did not exist in older kernels. (Daniel Henrique Barboza) target/riscv/kvm/kvm-cpu.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index b047ffa9c0..608495630f 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), @@ -1293,6 +1300,10 @@ 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 +2025,8 @@ 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 +2073,25 @@ 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 17:44:04 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=1778655835; cv=none; d=zohomail.com; s=zohoarc; b=N9wYINuduw3v/c3CD+d8DxkE9vkOUOQM89uz6QrpEsa6P0titL0SNiQdR1lY/mgxAWLxltscMzntX1iF6B3BndKXxfirwbqH5RF+dx4uAmNA5/iOYWFycMhXpQUMTohZf3eu0plRbI0d3xq76kVqnbF3DK+30cMbXdTMfCmM9OI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1778655835; 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=F2yLTTNzheILDG3UxccgzzwAprBvd0T8CWBeFLcgAJg=; b=kbvaCKw18CTEodfmRUVI6A8EwZgXPnqXsfbDHgm9ChZVdihB+ad/vU9JotC1udq5rP7IV/sPAhVJnaT/NrF7buBwiHvPk1i1rqijUaO3D+joUThViOZsYeVl6YnrGQEnjmP9DKjw+dhdNwZZ6WQSkbQNK5J/A0A/OLrWjswarBk= 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 1778655835560784.8216918719065; Wed, 13 May 2026 00:03:55 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wN3cs-0004on-KT; Wed, 13 May 2026 03:03:27 -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 1wN3cp-0004oG-Ri; Wed, 13 May 2026 03:03:25 -0400 Received: from m16.mail.163.com ([220.197.31.2]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wN3cl-0006x1-6s; Wed, 13 May 2026 03:03:23 -0400 Received: from thinkpadx13gen2i.. (unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wDXD0f+IQRqW951BA--.20095S4; Wed, 13 May 2026 15:02:41 +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=F2 yLTTNzheILDG3UxccgzzwAprBvd0T8CWBeFLcgAJg=; b=LHafB/gDar1PjgUkCK CgLc5PzXrNwCOO1HFFf1JgDLJuXchmVo5Tg7ZSQVKvZHyNdEIWqUR0wFMZx8wsJl VaIhxFxwlPGzLtbrbMXrLp3b2EprmNPPFEM1cb4lbaJ8PO6mo81ltjI4moQJvdbh reYmJn8O88afkY/tuXg/VMPH4= From: Zongmin Zhou To: daniel.barboza@oss.qualcomm.com, alistair.francis@wdc.com, chao.liu.zevorn@gmail.com, liwei1518@gmail.com, palmer@dabbelt.com, zhiwei_liu@linux.alibaba.com Cc: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, Zongmin Zhou Subject: [PATCH v2 2/2] target/riscv/kvm: Add BFloat16 extensions support Date: Wed, 13 May 2026 15:02:11 +0800 Message-Id: <1258febb0eeb4ee286eb88f70b077a7f1ece507f.1778653159.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: _____wDXD0f+IQRqW951BA--.20095S4 X-Coremail-Antispam: 1Uf129KBjvJXoW7tFyUGw13GF18ZF1fZw15CFg_yoW8Ar4kpr 4xKFWfCrWkJ3s5uw4xtrZ8Gw1UXw4jkw4kWwsF93W8JrWUG3ySvF9xt3W3Ca1DGa4FkFyY vFn5urWvkw45X37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07UiID7UUUUU= X-Originating-IP: [116.128.244.169] X-CM-SenderInfo: pplqsxxdorqiywtou0bp/xtbC0hEo02oEIhF1EAAA3A 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=220.197.31.2; 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_H3=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: 1778655838824154100 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 608495630f..34f60bd80c 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