From patchwork Wed Aug 2 16:46:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 13338552 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7AE63C001E0 for ; Wed, 2 Aug 2023 16:50:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+r/2DLi4O8ED13MMQ0BjjhkRO5FTlYDB/ktBgH07W0M=; b=ZQsjvudgsEFyhP muuEv7bA/285mirGh2fYgdtCIrGlREC5Pt/c2j4JJZHD3B/1wSXhE2r13J/PbrBXDk0gUSFjIOflK uFgnBxRgtGdrK899swSSl875BDk8+KhBktCGFGg3iugoBEr3cmDR6z+gypNWRveY/dJ2ZlWrFCi3r yNKKWAOJWX4owBRzO56Wj0CFngP/lWHhc1j7aIDJCKDC9onyZvLz8HHqgS8gElzbS9r187ANYePKn fmXiN8p47U20mZffQgth+rY4ExVsH0Ec7mYArMMuVyKAsUz5fwRKw0iQC8j4H1lMfVtWAxfGfmqaG OUx3R/bzssyE3RH5EEig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRF3b-005P7Y-1G; Wed, 02 Aug 2023 16:50:43 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qRF3Y-005P5f-23 for linux-riscv@lists.infradead.org; Wed, 02 Aug 2023 16:50:41 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 24FD7619D7; Wed, 2 Aug 2023 16:50:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C33EC433C7; Wed, 2 Aug 2023 16:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690995039; bh=ZxSSeBb/S16STGNIjLgLnRd4gdTK7GWBFlxeOcsXSwE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Re6hHhbVV1BPv0jkxSRI9lbIULPSLrArCk6YQsxBcILuiJJmeoU/B3uTrAvZW8Hsd NESYQvpaFa3FeTrzeq5alcZ+8qf3hCjwa1dYlRqVehWgABTIjXr0SOjxmkO5qRpSNq 1qIXDIaUuS+1gRLf0ruSHeazVgAk3gjiR9cBr17jFfhwbqsItlZSZChiEXW9Aeudck ng8PI4CEgU7l6nTNJRMMj0DoG12Gwuhgv8z9TUe+XHbdIBKHy1e11wN96y5M4+BC+R XiHmg97d52zUNBHlHhFRH+ttLsm02XcUzSw/7ie2wcPZp3vbS+OXOV8lwqhgE8Ytdi cNN+zltkvBpng== From: guoren@kernel.org To: paul.walmsley@sifive.com, anup@brainfault.org, peterz@infradead.org, mingo@redhat.com, will@kernel.org, palmer@rivosinc.com, longman@redhat.com, boqun.feng@gmail.com, tglx@linutronix.de, paulmck@kernel.org, rostedt@goodmis.org, rdunlap@infradead.org, catalin.marinas@arm.com, conor.dooley@microchip.com, xiaoguang.xing@sophgo.com, bjorn@rivosinc.com, alexghiti@rivosinc.com, keescook@chromium.org, greentime.hu@sifive.com, ajones@ventanamicro.com, jszhang@kernel.org, wefu@redhat.com, wuwei2016@iscas.ac.cn Cc: linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-csky@vger.kernel.org, Guo Ren , Guo Ren Subject: [PATCH V10 11/19] RISC-V: paravirt: pvqspinlock: KVM: Implement kvm_sbi_ext_pvlock_kick_cpu() Date: Wed, 2 Aug 2023 12:46:53 -0400 Message-Id: <20230802164701.192791-12-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20230802164701.192791-1-guoren@kernel.org> References: <20230802164701.192791-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230802_095040_717535_77117113 X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Guo Ren We only need to call the kvm_vcpu_kick() and bring target_vcpu from the halt state. No irq raised, no other request, just a pure vcpu_kick. Signed-off-by: Guo Ren Signed-off-by: Guo Ren --- arch/riscv/kvm/vcpu_sbi_pvlock.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/riscv/kvm/vcpu_sbi_pvlock.c b/arch/riscv/kvm/vcpu_sbi_pvlock.c index 544a456c5041..914fc58aedfe 100644 --- a/arch/riscv/kvm/vcpu_sbi_pvlock.c +++ b/arch/riscv/kvm/vcpu_sbi_pvlock.c @@ -12,6 +12,24 @@ #include #include +static int kvm_sbi_ext_pvlock_kick_cpu(struct kvm_vcpu *vcpu) +{ + struct kvm_cpu_context *cp = &vcpu->arch.guest_context; + struct kvm *kvm = vcpu->kvm; + struct kvm_vcpu *target; + + target = kvm_get_vcpu_by_id(kvm, cp->a0); + if (!target) + return SBI_ERR_INVALID_PARAM; + + kvm_vcpu_kick(target); + + if (READ_ONCE(target->ready)) + kvm_vcpu_yield_to(target); + + return SBI_SUCCESS; +} + static int kvm_sbi_ext_pvlock_handler(struct kvm_vcpu *vcpu, struct kvm_run *run, struct kvm_vcpu_sbi_return *retdata) { @@ -21,6 +39,7 @@ static int kvm_sbi_ext_pvlock_handler(struct kvm_vcpu *vcpu, struct kvm_run *run switch (funcid) { case SBI_EXT_PVLOCK_KICK_CPU: + ret = kvm_sbi_ext_pvlock_kick_cpu(vcpu); break; default: ret = SBI_ERR_NOT_SUPPORTED;