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[201.69.66.110]) by smtp.gmail.com with ESMTPSA id h25-20020a9d6a59000000b006b8850ad193sm511382otn.56.2023.07.06.03.18.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jul 2023 03:18:49 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liweiwei@iscas.ac.cn, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, ajones@ventanamicro.com, Daniel Henrique Barboza Subject: [PATCH v9 18/20] target/riscv: update multi-letter extension KVM properties Date: Thu, 6 Jul 2023 07:17:36 -0300 Message-ID: <20230706101738.460804-19-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230706101738.460804-1-dbarboza@ventanamicro.com> References: <20230706101738.460804-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2001:4860:4864:20::2c; envelope-from=dbarboza@ventanamicro.com; helo=mail-oa1-x2c.google.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org We're now ready to update the multi-letter extensions status for KVM. kvm_riscv_update_cpu_cfg_isa_ext() is called called during vcpu creation time to verify which user options changes host defaults (via the 'user_set' flag) and tries to write them back to KVM. Failure to commit a change to KVM is only ignored in case KVM doesn't know about the extension (-EINVAL error code) and the user wanted to disable the given extension. Otherwise we're going to abort the boot process. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Andrew Jones Reviewed-by: Alistair Francis --- target/riscv/kvm.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index 2d39ec154f..ba940e570e 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -273,6 +273,32 @@ static void kvm_cpu_set_multi_ext_cfg(Object *obj, Visitor *v, kvm_cpu_cfg_set(cpu, multi_ext_cfg, value); } +static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU *cpu, CPUState *cs) +{ + CPURISCVState *env = &cpu->env; + uint64_t id, reg; + int i, ret; + + for (i = 0; i < ARRAY_SIZE(kvm_multi_ext_cfgs); i++) { + KVMCPUConfig *multi_ext_cfg = &kvm_multi_ext_cfgs[i]; + + if (!multi_ext_cfg->user_set) { + continue; + } + + id = kvm_riscv_reg_id(env, KVM_REG_RISCV_ISA_EXT, + multi_ext_cfg->kvm_reg_id); + reg = kvm_cpu_cfg_get(cpu, multi_ext_cfg); + ret = kvm_set_one_reg(cs, id, ®); + if (ret != 0) { + error_report("Unable to %s extension %s in KVM, error %d", + reg ? "enable" : "disable", + multi_ext_cfg->name, ret); + exit(EXIT_FAILURE); + } + } +} + static void kvm_riscv_add_cpu_user_properties(Object *cpu_obj) { int i; @@ -792,6 +818,7 @@ int kvm_arch_init_vcpu(CPUState *cs) } kvm_riscv_update_cpu_misa_ext(cpu, cs); + kvm_riscv_update_cpu_cfg_isa_ext(cpu, cs); return ret; }