From mboxrd@z Thu Jan 1 00:00:00 1970 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 6A661C43458 for ; Wed, 8 Jul 2026 07:57:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=oAzLQ3gzA+KnrCzUsFBoGBhVOWJwQaHovl8NoBHBi/Q=; b=uZYjzhzVXy8EYre0c2lLpTbBTw J+xTFxRyxzsI4Rmocnttd6bJArkhO+Rl8KwMmtQzs4xOm5PMTl81poif25Tx+kYViCf9f7spFgAGO l4D7r40WgrAIrzD0l2KMP9mpRugHgaAvrFkpcUlM7Eu6ixtT8MXZplrrxTpOkiARm/bekj94kR6z5 aqq993XN/Rjr9cFNFYgMnFSmtsjYWcZ4nZ4Crh0AaCv1W2Opr4kkAEZbJyPpbkIDJBeFOpfYjbHms lY3fIP0lg5xUbL9wRYWCLlqzUv0c++tsEeGxrTCk16koV07god22AlGgRJyAQFpnQhH4s6wcMtNYS XY0jdG5w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whNAG-0000000GYhA-3btT; Wed, 08 Jul 2026 07:57:52 +0000 Received: from mail-lf1-x14a.google.com ([2a00:1450:4864:20::14a]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whNAB-0000000GYdO-1PXB for linux-arm-kernel@lists.infradead.org; Wed, 08 Jul 2026 07:57:48 +0000 Received: by mail-lf1-x14a.google.com with SMTP id 2adb3069b0e04-5aeb711dff7so267316e87.3 for ; Wed, 08 Jul 2026 00:57:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783497465; x=1784102265; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=oAzLQ3gzA+KnrCzUsFBoGBhVOWJwQaHovl8NoBHBi/Q=; b=khsxoAEmhVPKcYb3iarHzPzgZL5KFFdIrwuCPl+2TI0tdTUqYwUGOil/C8gKNkq9Ib moZFtGJsB3t4Vxkda/f6Wdk8oFSlETb0AVHv93imO4Ce7WG5LlJwqLuLUuuR5Vwpf81H Bp6vr/jQLG69YfswVe54mjA7O2MQ105xxzoV9NZ3ecM0DMvkwaesNeL/cXfVeJWBeg1b 8IjHL+kkOQOxz2tapQeGdWtJvNmkpBYg3dEIo++Dwas0hp96/yFYVAg4xv8WzEHGIkY4 PqjxBIlC6h8RYxKObgWC7S1bnf8/RK9w3sOxqDC2xwqqH90KH/HYRjkTsZcmhenjNYF1 MGVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783497465; x=1784102265; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oAzLQ3gzA+KnrCzUsFBoGBhVOWJwQaHovl8NoBHBi/Q=; b=Z2Sw1fVdU22NVAQ/Y4xae4eXS2VeC/80oSlv04qha4zkckaekVWbAGpohupvi2ub43 UM+HT9927SJupRaBJ05g820UG+GKXwFtKM8RNcwammybFrubaA9VLtyyZ+wmR77nC9iq xAfh+iYrpah8FUpq6VdhHnZ9JmUR8xzLzrZ/ZN+W4NxuknLCu821j/OgCXm1RjnT6b6n fW2OSFmxnvc5HdyIKi5OyiRDoPsE9Ftoqa9PjOKTrDC7A8MSpidSY6qJxvVlTJ9Y7Hfs qgFues21lGcSU5nIm01q5QACQhsSxqTgiPzXcwQJNLpcHbSfI9DGwSmT/GkUkX7DNMFy 4mEQ== X-Gm-Message-State: AOJu0YzNQPFrjtZKw7u2RybCo9C4YiJS++L2L+IwrOg4s6vwkN7YLMF7 LUimFz5CDfFQZ2wOmmINlsLboCZ1NJG/r4cDJX4llOTIS/pfonQ6rBmmx4sMMr3nplpnQ0/SUBv 8Q+MekKG2L2cVdAtLR9Fnow== X-Received: from ljic3-n1.prod.google.com ([2002:a05:651c:2343:10b0:39a:fb7d:982d]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6512:3b20:b0:5ae:bb35:c956 with SMTP id 2adb3069b0e04-5b011497d66mr431084e87.56.1783497464617; Wed, 08 Jul 2026 00:57:44 -0700 (PDT) Date: Wed, 8 Jul 2026 08:54:32 +0100 In-Reply-To: <20260708075435.47419-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20260708075435.47419-1-vdonnefort@google.com> X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog Message-ID: <20260708075435.47419-2-vdonnefort@google.com> Subject: [PATCH v2 1/4] KVM: arm64: Allow early calls to pKVM host_share/unshare_hyp From: Vincent Donnefort To: maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, rostedt@goodmis.org Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kernel-team@android.com, qperret@google.com, tabba@google.com, linux-trace-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260708_005747_409943_A37318CD X-CRM114-Status: UNSURE ( 8.61 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The hypervisor tracing for pKVM relies on the __pkvm_host_share_hyp and __pkvm_host_unshare_hyp HVCs. In order to start tracing as early as possible, allow those two HVCs before the host is deprivileged. Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Signed-off-by: Vincent Donnefort diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 043495f7fc78..fb049c40d04f 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -89,12 +89,12 @@ enum __kvm_host_smccc_func { __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_vmcr_aprs, __KVM_HOST_SMCCC_FUNC___vgic_v5_save_apr, __KVM_HOST_SMCCC_FUNC___vgic_v5_restore_vmcr_apr, + __KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp, + __KVM_HOST_SMCCC_FUNC___pkvm_host_unshare_hyp, MARKER(__KVM_HOST_SMCCC_FUNC_PKVM_ONLY), /* Hypercalls that are available only when pKVM has finalised. */ - __KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp, - __KVM_HOST_SMCCC_FUNC___pkvm_host_unshare_hyp, __KVM_HOST_SMCCC_FUNC___pkvm_host_donate_guest, __KVM_HOST_SMCCC_FUNC___pkvm_host_share_guest, __KVM_HOST_SMCCC_FUNC___pkvm_host_unshare_guest, diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c index d3c69de698f4..361dbfe2e832 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -740,9 +740,9 @@ static const hcall_t host_hcall[] = { HANDLE_FUNC(__vgic_v3_restore_vmcr_aprs), HANDLE_FUNC(__vgic_v5_save_apr), HANDLE_FUNC(__vgic_v5_restore_vmcr_apr), - HANDLE_FUNC(__pkvm_host_share_hyp), HANDLE_FUNC(__pkvm_host_unshare_hyp), + HANDLE_FUNC(__pkvm_host_donate_guest), HANDLE_FUNC(__pkvm_host_share_guest), HANDLE_FUNC(__pkvm_host_unshare_guest), -- 2.55.0.795.g602f6c329a-goog