From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.8bytes.org (mail.8bytes.org [85.214.250.239]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 847053F6C4D; Mon, 8 Jun 2026 14:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=85.214.250.239 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780929813; cv=none; b=PMlGPIpyhD6JVXFY1Bvsr1aO7J+9ZOAVYPx9jK1dDXAI4L5xJUAnI4pS+xNjTFmQ53fRQ0mCBXmWI2gg+3UYvoYwlvXztgxDabuCoIisvuxUCnuoh0GM7k7lCEHL/kRuG3NTWCGBjU6PXO0z2FB6rgHSkh3czQgEDYfHnfQqQVw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780929813; c=relaxed/simple; bh=aVqlOlfWSlxkvl0aGEqOt0VKD9r53NJ0PvMQ3ZrPPvY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kBOQVCqbwDOfUtIQRpHNaQ+956jhUQ1tiPx9nEdxwgwJgWnq5a76AQSuGK2vHH76+w7l+7K22/SZRI6pzsuiKY7vXgQ8I3giRdcEXx9wHKG548zDrrFfWlHA3niPQurddySfJGj2wye2wzrS0lFJTXxlJF7jtuaXm7c3vgMcg9g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=8bytes.org; spf=pass smtp.mailfrom=8bytes.org; arc=none smtp.client-ip=85.214.250.239 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=8bytes.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=8bytes.org Received: from io.home.8bytes.org (p4ffe1d30.dip0.t-ipconnect.de [79.254.29.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.8bytes.org (Postfix) with ESMTPSA id 2E2042028D2; Mon, 8 Jun 2026 16:43:15 +0200 (CEST) From: =?UTF-8?q?J=C3=B6rg=20R=C3=B6del?= To: Paolo Bonzini , Sean Christopherson Cc: Tom Lendacky , ashish.kalra@amd.com, michael.roth@amd.com, nsaenz@amazon.com, anelkz@amazon.de, James.Bottomley@HansenPartnership.com, Melody Wang , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, x86@kernel.org, coconut-svsm@lists.linux.dev, joerg.roedel@amd.com Subject: [PATCH 47/60] kvm: x86: Select a plane to run Date: Mon, 8 Jun 2026 16:42:39 +0200 Message-ID: <20260608144252.351443-48-joro@8bytes.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260608144252.351443-1-joro@8bytes.org> References: <20260608144252.351443-1-joro@8bytes.org> Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Joerg Roedel In the KVM_RUN path, select a runnable VCPU plane and use it to enter the guest. Also handle KVM_REQ_PLANE_RESCHED events to switch planes without exiting to user-space. Signed-off-by: Joerg Roedel --- arch/x86/kvm/x86.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 7e94a378b3d2..b9828cd31136 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11398,6 +11398,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) goto out; } } + + if (kvm_check_request(KVM_REQ_PLANE_RESCHED, vcpu)) { + vcpu->common->plane_switch = true; + r = 0; + goto out; + } } if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win || @@ -12076,7 +12082,7 @@ static int kvm_x86_vcpu_pre_run(struct kvm_vcpu *vcpu) return kvm_x86_call(vcpu_pre_run)(vcpu); } -int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) +static int __kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) { struct kvm_queued_exception *ex = &vcpu->arch.exception; struct kvm_run *kvm_run = vcpu->run; @@ -12196,6 +12202,27 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) return r; } +int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu_plane0) +{ + struct kvm_vcpu_common *common = vcpu_plane0->common; + int ret; + + do { + struct kvm_vcpu *vcpu = kvm_vcpu_select_plane(vcpu_plane0); + + if (vcpu == NULL) + return -EINVAL; + + common->plane_switch = false; + + ret = __kvm_arch_vcpu_ioctl_run(vcpu); + if (ret) + break; + } while (vcpu_plane0->common->plane_switch); + + return ret; +} + static void __get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) { if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { -- 2.53.0