From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2FC7822DA1C for ; Fri, 23 May 2025 10:22:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747995766; cv=none; b=TPNeo0E2w8wHbQhlkheh/9zWVBR9oe6rRIdTySnnfVbEQ/npuGEPQuQM3GeqGG0kGrh3E4lBggdBW964B3OC5rNxttilXkMjSyBtWyVqTkNvNpu9DvMhtp4a+JgHFnzIIWGlDy14L3bs9Y+3awnaB0gCmL76Kq1EL+Vr9XD4eIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747995766; c=relaxed/simple; bh=LuwM4EryVnBA1GFGBe+YaFxQNitu3P/2ZZZc+pRHzRo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TtNSAxx1Oe6Y+91S0V3NdbQBuqH7AdOQHaMyBAxF9dc1Gq3sgtY7wYQd57/kTfKweoJTRKvxDALKjtKkDn641D/inbaCJbPgzhsYXaoscT+Yn6HHKx4Nz5NnckoQXJuCP8AwIA10pRAlURFCfgHOz9CyqQtjs69SUV1wbsHo/yw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=Q0BQNQUP; arc=none smtp.client-ip=209.85.210.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="Q0BQNQUP" Received: by mail-pf1-f178.google.com with SMTP id d2e1a72fcca58-7399838db7fso692495b3a.0 for ; Fri, 23 May 2025 03:22:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1747995764; x=1748600564; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=L4S246g4wPo4d+7PdKHFRm08olDhB+ym0CPBTheC+H4=; b=Q0BQNQUPyusy+nFDHKp5S5dQHXS7tAR8A+eJqS9bwitXo0QZjKCFGfYXigXg8lELKP yWHqRkr4Z8cK3v1JbM75hCz5htDQ0FxaJsvQFTdFc3p+TNRjS/83dHik4LMibRl+K+y1 ywvyEcH8vQTgxF90wjCZoz07L4/eVixZQSPRdq6YHvuRXoID87t0Q/fODysC4Fhd/u60 D/ahhtj7NuPqFwVAwGhjHGfgA96EqQvP8KMVYu/gLNQhPGwKj/lwe17nhLwwfASYKjL5 H6Gxi2L4XOm9qxnt3wuwr65/s44X3MDULbgC9Z4A4Y+fbpPmLlVo2+X3yYDq6iXLXJgJ zDhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747995764; x=1748600564; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=L4S246g4wPo4d+7PdKHFRm08olDhB+ym0CPBTheC+H4=; b=cacX7Sgz45ABUehJ83lHLK42bYM/17ITxJCVLTcvm82S8GfREmCiSNJdzN29B34b1K 9TEzxjtd7q8Jk9aTgFGpnc87ev4/yu9OZwek7/ikOtr2P9s+95aqlciimADwSKchMWKr vwMLab5cUUn7uhPCqUnUuARM7jGNtGHhF1oOXMhYIWtYBdSs/ndy3k3oJxH90FScIyB9 gc6sQCUcyqlyWDwcIBgAHodqW6qzyXsiVx14Zf3GuAL8vewcPwTa+ckL6/ccVFRPrCHx csX8E7MORvkuj/9JPIWCQZoe7+BYHHTBzwTe/8r95bMsobvKDuQynLokD12MOgNiLtdM RyzA== X-Forwarded-Encrypted: i=1; AJvYcCXSIy2qPzSp5DvWMMDNh61I8IveWVoe05nmh8JQGnmN8lwa8CGztdTOUE1tZMXxYWnw6zo7WoRKUrU=@vger.kernel.org X-Gm-Message-State: AOJu0YxX3oDJffPW8Wg1UPMXIWmREmDYT6+ZZatoVPa2J/ktn9vTgsUZ 5TgMHaCiZbnFQ8IaPKJJEpuR1FaldJOWGNP85PNBRkJYMNqzIvkNSBsiTKldq9jTz1c= X-Gm-Gg: ASbGnctrTKA2svmFxjgv3uYskjaS+lWvUg5ruv3EurTF+UrzHp6tkhfWUIL522stXMo auRcfKOr1lYy/YbkTor1ZEuoxIMujMi222LPSTCSJsnkWUJ2CoZEcpgW4aSFg/H+uQIj9LuziG2 D22VNkcIc6GPJTMu1VwX1OPa/JoYT2PKjjXBBmRvF4VZA0nAMX/6ebyUxTqs5AzEIM6JeZvKv90 zSQb+zlZWGw4VJSKHPLRAxuWvXpSqdB1C1TuotpZuMvnfiN2GOYJZL9uhdFkKIIfBwYX2GESV0m Nb9ECiXeap3TjYypq/wJtcPs98MtuuCOp9fQyh02lM/C+pJSyKWr X-Google-Smtp-Source: AGHT+IH4SSMbmRg5K8o/IXBgX0ZJOEsXjczbFsjn2WjtC7mUPVoS61DQQViAkHrByQ5hjbixI+FQmw== X-Received: by 2002:a05:6a00:9294:b0:740:6f6:7338 with SMTP id d2e1a72fcca58-745ecdc83c5mr3906723b3a.3.1747995764468; Fri, 23 May 2025 03:22:44 -0700 (PDT) Received: from carbon-x1.. ([2a01:e0a:e17:9700:16d2:7456:6634:9626]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-742a9829ce8sm12466688b3a.118.2025.05.23.03.22.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 May 2025 03:22:43 -0700 (PDT) From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Paul Walmsley , Palmer Dabbelt , Anup Patel , Atish Patra , Shuah Khan , Jonathan Corbet , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Samuel Holland , Andrew Jones , Deepak Gupta , Charlie Jenkins , Atish Patra Subject: [PATCH v8 12/14] RISC-V: KVM: add SBI extension reset callback Date: Fri, 23 May 2025 12:19:29 +0200 Message-ID: <20250523101932.1594077-13-cleger@rivosinc.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250523101932.1594077-1-cleger@rivosinc.com> References: <20250523101932.1594077-1-cleger@rivosinc.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, only the STA extension needed a reset function but that's going to be the case for FWFT as well. Add a reset callback that can be implemented by SBI extensions. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones Reviewed-by: Atish Patra --- arch/riscv/include/asm/kvm_host.h | 1 - arch/riscv/include/asm/kvm_vcpu_sbi.h | 2 ++ arch/riscv/kvm/vcpu.c | 2 +- arch/riscv/kvm/vcpu_sbi.c | 24 ++++++++++++++++++++++++ arch/riscv/kvm/vcpu_sbi_sta.c | 3 ++- 5 files changed, 29 insertions(+), 3 deletions(-) diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 0e9c2fab6378..4fa02e082142 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -407,7 +407,6 @@ void __kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); bool kvm_riscv_vcpu_stopped(struct kvm_vcpu *vcpu); -void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu); #endif /* __RISCV_KVM_HOST_H__ */ diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h index bcb90757b149..cb68b3a57c8f 100644 --- a/arch/riscv/include/asm/kvm_vcpu_sbi.h +++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h @@ -57,6 +57,7 @@ struct kvm_vcpu_sbi_extension { */ int (*init)(struct kvm_vcpu *vcpu); void (*deinit)(struct kvm_vcpu *vcpu); + void (*reset)(struct kvm_vcpu *vcpu); }; void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run); @@ -78,6 +79,7 @@ bool riscv_vcpu_supports_sbi_ext(struct kvm_vcpu *vcpu, int idx); int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run); void kvm_riscv_vcpu_sbi_init(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_sbi_deinit(struct kvm_vcpu *vcpu); +void kvm_riscv_vcpu_sbi_reset(struct kvm_vcpu *vcpu); int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, unsigned long reg_num, unsigned long *reg_val); diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 2259717e3b89..ec9f44545cea 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -96,7 +96,7 @@ static void kvm_riscv_reset_vcpu(struct kvm_vcpu *vcpu) vcpu->arch.hfence_tail = 0; memset(vcpu->arch.hfence_queue, 0, sizeof(vcpu->arch.hfence_queue)); - kvm_riscv_vcpu_sbi_sta_reset(vcpu); + kvm_riscv_vcpu_sbi_reset(vcpu); /* Reset the guest CSRs for hotplug usecase */ if (loaded) diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c index 3139f171c20f..50be079b5528 100644 --- a/arch/riscv/kvm/vcpu_sbi.c +++ b/arch/riscv/kvm/vcpu_sbi.c @@ -536,3 +536,27 @@ void kvm_riscv_vcpu_sbi_deinit(struct kvm_vcpu *vcpu) ext->deinit(vcpu); } } + +void kvm_riscv_vcpu_sbi_reset(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context; + const struct kvm_riscv_sbi_extension_entry *entry; + const struct kvm_vcpu_sbi_extension *ext; + int idx, i; + + for (i = 0; i < ARRAY_SIZE(sbi_ext); i++) { + entry = &sbi_ext[i]; + ext = entry->ext_ptr; + idx = entry->ext_idx; + + if (idx < 0 || idx >= ARRAY_SIZE(scontext->ext_status)) + continue; + + if (scontext->ext_status[idx] != KVM_RISCV_SBI_EXT_STATUS_ENABLED || + !ext->reset) + continue; + + ext->reset(vcpu); + } +} + diff --git a/arch/riscv/kvm/vcpu_sbi_sta.c b/arch/riscv/kvm/vcpu_sbi_sta.c index 5f35427114c1..cc6cb7c8f0e4 100644 --- a/arch/riscv/kvm/vcpu_sbi_sta.c +++ b/arch/riscv/kvm/vcpu_sbi_sta.c @@ -16,7 +16,7 @@ #include #include -void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu) +static void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu) { vcpu->arch.sta.shmem = INVALID_GPA; vcpu->arch.sta.last_steal = 0; @@ -156,6 +156,7 @@ const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta = { .extid_end = SBI_EXT_STA, .handler = kvm_sbi_ext_sta_handler, .probe = kvm_sbi_ext_sta_probe, + .reset = kvm_riscv_vcpu_sbi_sta_reset, }; int kvm_riscv_vcpu_get_reg_sbi_sta(struct kvm_vcpu *vcpu, -- 2.49.0