Message ID | 20230419221716.3603068-26-atishp@rivosinc.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Wed, 19 Apr 2023 15:18:24 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id jn11-20020a170903050b00b00196807b5189sm11619190plb.292.2023.04.19.15.18.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 15:18:24 -0700 (PDT) From: Atish Patra <atishp@rivosinc.com> To: linux-kernel@vger.kernel.org Cc: Atish Patra <atishp@rivosinc.com>, Alexandre Ghiti <alex@ghiti.fr>, Andrew Jones <ajones@ventanamicro.com>, Andrew Morton <akpm@linux-foundation.org>, Anup Patel <anup@brainfault.org>, Atish Patra <atishp@atishpatra.org>, =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= <bjorn@rivosinc.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>, Sean Christopherson <seanjc@google.com>, linux-coco@lists.linux.dev, Dylan Reid <dylan@rivosinc.com>, abrestic@rivosinc.com, Samuel Ortiz <sameo@rivosinc.com>, Christoph Hellwig <hch@infradead.org>, Conor Dooley <conor.dooley@microchip.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Guo Ren <guoren@kernel.org>, Heiko Stuebner <heiko@sntech.de>, Jiri Slaby <jirislaby@kernel.org>, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, Mayuresh Chitale <mchitale@ventanamicro.com>, Palmer Dabbelt <palmer@dabbelt.com>, Paolo Bonzini <pbonzini@redhat.com>, Paul Walmsley <paul.walmsley@sifive.com>, Rajnesh Kanwal <rkanwal@rivosinc.com>, Uladzislau Rezki <urezki@gmail.com> Subject: [RFC 25/48] RISC-V: KVM: Skip HVIP update for TVMs Date: Wed, 19 Apr 2023 15:16:53 -0700 Message-Id: <20230419221716.3603068-26-atishp@rivosinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230419221716.3603068-1-atishp@rivosinc.com> References: <20230419221716.3603068-1-atishp@rivosinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 02C2618002B X-Rspam-User: X-Stat-Signature: rx5z6aqk4fxfmnnowazdso7b9idqo9h9 X-HE-Tag: 1681942705-817750 X-HE-Meta: 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 CFCO4wGv EhzcDajLV9R79W9W3AFd6PwmYIe6Rove5xxntDZVVTaXTpq9Nb4tx9Gq51t/3yV5vXy8HrZWWBUJlKW2z3GPAcLrg8DJkDscUEmbw5XkYQOHNM1zN8yWYAzrWQnkKXSPrKhs10aIWodJaiaTDSdx1aLua9VDX4VMxaR89eHdA3v/60c/1bD+/dvxrHZVz+Jy52VWgt1wr7MOl5xDyT+wzAiTeBRl25WoSMfsxl6K33a0GJgTKm6Qk/KUEotBA8zhjYByVibcHFIQ8e7CuaLsk4YwN7cb+L5l5hPT27589sfJXc39F0y4hQb1a8JB0J5Sc8yP/NIXpwUMeYri1WvKgYyj1IqLJsI+WL39qxBbfVRniyJt2wJQbQ5u4zRbdRqK8dmeos/RNqq102kn7648GHTF29ucJ/ceHQvJl7Wq5mr1VlUB8T6FM4cT6hoZ0tsh/bNcQHhukki48RXctC8V+izn5BA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
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RISC-V CoVE support
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expand
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diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 43a0b8c..20d4800 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -822,7 +822,10 @@ void kvm_riscv_vcpu_sync_interrupts(struct kvm_vcpu *vcpu) /* Read current HVIP and VSIE CSRs */ csr->vsie = nacl_csr_read(CSR_VSIE); - /* Sync-up HVIP.VSSIP bit changes does by Guest */ + /* + * Sync-up HVIP.VSSIP bit changes does by Guest. For TVMs, + * the HVIP is not updated by the TSM. Expect it to be zero. + */ hvip = nacl_csr_read(CSR_HVIP); if ((csr->hvip ^ hvip) & (1UL << IRQ_VS_SOFT)) { if (hvip & (1UL << IRQ_VS_SOFT)) { @@ -1305,8 +1308,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) */ kvm_riscv_vcpu_flush_interrupts(vcpu); - /* Update HVIP CSR for current CPU */ - kvm_riscv_update_hvip(vcpu); + /* Update HVIP CSR for current CPU only for non TVMs */ + if (!is_cove_vcpu(vcpu)) + kvm_riscv_update_hvip(vcpu); if (ret <= 0 || kvm_riscv_gstage_vmid_ver_changed(vcpu->kvm) ||
Skip HVIP update as the Host shouldn't be able to inject interrupt directly to a TVM. Signed-off-by: Atish Patra <atishp@rivosinc.com> --- arch/riscv/kvm/vcpu.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)