Message ID | 20230419221716.3603068-4-atishp@rivosinc.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Wed, 19 Apr 2023 15:17:36 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id jn11-20020a170903050b00b00196807b5189sm11619190plb.292.2023.04.19.15.17.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 15:17:35 -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 03/48] RISC-V: KVM: Invoke aia_update with preempt disabled/irq enabled Date: Wed, 19 Apr 2023 15:16:31 -0700 Message-Id: <20230419221716.3603068-4-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-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 41A3D1C000D X-Stat-Signature: 1eaxuobz55oy8bu1o8jwe6mqmbsxksbh X-HE-Tag: 1681942656-845142 X-HE-Meta: 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 4YD6ZlNN Sa73uz4BNOMyDRQUBIcQy/RVdb+esqTv7PqOGGCZEUNIV2i+2sIbPOo+epU0IfaiUGcZQlcyRlLPt6ugspWD2IH/O2Sa+msdlZ6kvCw7XAh8JnZRk0taNOA4Ua6H2sasbY41eO94pQb1LkeEyB9i1tbSLbannN9ZXw3pbakDYn9uY8q50BxzBwl1ZH3/FQuqlTUXf7jy85nifCs3Jsd2ccNYVkykjU2ztUYK6A2ZdxyzMzaHN+3xuYEJGhSt+JhgfqiNsz7hLOa/ppYxIvboW7aDQSq8uqhD1CNCvjaMa6u6KMz8KvcGdDb2gC227ZKnTMGBsnF4FhcbcfNH4twCbG7cS4LaEbUacEMfJkUVIBI1e03fQjH7/JHBoIIjRT1yZZT7Pd0yn1NH0uYVktfisdT0oFhdO7IjWcYlelz1/23bhEyo2LivZL1Od3Z6Nuwl6aKvHVZPm7NxzFfaVkQtX3JErddvvdAivdJHSteSD2ctt1esFk/irmM0DM/hNLd8MoDpW 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 e65852d..c53bf98 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -1247,15 +1247,16 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) kvm_riscv_check_vcpu_requests(vcpu); - local_irq_disable(); - /* Update AIA HW state before entering guest */ + preempt_disable(); ret = kvm_riscv_vcpu_aia_update(vcpu); if (ret <= 0) { - local_irq_enable(); + preempt_enable(); continue; } + preempt_enable(); + local_irq_disable(); /* * Ensure we set mode to IN_GUEST_MODE after we disable * interrupts and before the final VCPU requests check.
Some of the aia_update operations required to invoke IPIs that needs interrupts to be enabled. Currently, entire aia_update is being called from irqs disabled context while only preemption disable is necessary. Signed-off-by: Atish Patra <atishp@rivosinc.com> --- arch/riscv/kvm/vcpu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)