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 2A219C43458 for ; Mon, 6 Jul 2026 17:54:56 +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=HwWa9xikmrWk6BiuNr1ehvo1nd7/hCW6RShSp6OTx38=; b=ICb1gJ8S6C7I67eiT8f0JwqxtC XNrRxdjBdz4mmxpkLbm8apV0Z9dqv1WLVwG0QOHfvfEKYsLJJhpKh47cR1c0pjuRvKualOlYAPBRK yaKx10YoXvDBeEr/0rirP7WpbLRWPmNvYRdJ4BN+iy94hThOPvBraWfFVQ9wZeWRG/Wssn8r1aqkg rqJNiJXfCNaTwAZcLZjZLh18YcGgbRCJqMf/KY9n1MIy5uVll2LyrVLf2Xc6y2Y0ptfiAeSQqyS+w pE10Pm5h++ROkNwZLQUlC5YP05W1F7mnRv/xGPjy6gNbllfKdJb/Me0eDXDmYkgZ/gg2MzfBJPXrZ FSrobkkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wgnWl-0000000DFmf-40ac; Mon, 06 Jul 2026 17:54:43 +0000 Received: from mail-wm1-x349.google.com ([2a00:1450:4864:20::349]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wgnWf-0000000DFbf-1gCX for linux-arm-kernel@lists.infradead.org; Mon, 06 Jul 2026 17:54:38 +0000 Received: by mail-wm1-x349.google.com with SMTP id 5b1f17b1804b1-493ce4b7777so22643325e9.3 for ; Mon, 06 Jul 2026 10:54:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783360471; x=1783965271; darn=lists.infradead.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=HwWa9xikmrWk6BiuNr1ehvo1nd7/hCW6RShSp6OTx38=; b=Bfem0o3/Tb1qsYl7f01ubL7TO6Fq5oZnyAJ74ojsmw16UJ8chFB+EA7ryyB+I1fWmp ZIrHNOqlkl8qL0pqvUzjZdukzq4d9x3s2aUgHJ7bd2xAp2GTzBaKowFwBFGO+g7WkVEu rejUzFEb7CL/S0vz73fdjfqRJ5BqHjlbLHuT+QnV9tPf9I0w2AR8ud2NId2apoDQHFsl WFUlSTS2YoBBMP+TVyuhSmmjccT+OtxFdHj+UCNWzY1IzZxRHkzzDU1kOUUnRWSOTpHF /umj5vLy8rhIewEv0dM58EdXXQ7I/UaJ/WfN2mZHEspxTa99G1aN+TegfVaPKNP/Q7BD mNBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783360471; x=1783965271; h=content-type: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:content-type; bh=HwWa9xikmrWk6BiuNr1ehvo1nd7/hCW6RShSp6OTx38=; b=akWiNg7f0ST5zVvTTm7cYWHTJ0jBb3bMOHsjV8DXIqbpmYcUmHtJJXc1JCCsWKdS3a JisKB5n+p91bibrBP+580hwxpGWtOvgjfWs7N/9Mo1a7aRgCUhE+IsYICCnArA4dbGYm gS46JoN/6AwrKg9JvPpFx10Ex4uERkG+oAdRAbpqJKXYnOIBu2ZPymCuYiBoOunwhxQz 4zqr8OHUAVGL2rye53L5GXCMeU3BtFi7wrlnXDBJ3ENqJ2cs8Sibe0x3Pk0lxKEaoL90 yFmCxtj5c7ZHNlElym/CFUXq6W+NQfLxpDOYMXc3knfWXP1uUSpwUGZD9sv55h7hpVBq AR+w== X-Gm-Message-State: AOJu0YyaYdRGgVfUegeQlI7zYAsaKiIYx+shLI3qbU1fn719tGddqKWs yCW1xvU0AxiQ685rlvDND8pDH2z2xwsYoe3NUoSBYywgt46gQuGCKwZC3cWBR3UrS+JhCDa0ZSH 8qPgMcWSeGaukNDRhJ0t3+w== X-Received: from wmsm35.prod.google.com ([2002:a05:600c:3b23:b0:493:b12d:1375]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:3153:b0:493:bc4a:fb56 with SMTP id 5b1f17b1804b1-493df09fd08mr19227555e9.39.1783360470456; Mon, 06 Jul 2026 10:54:30 -0700 (PDT) Date: Mon, 6 Jul 2026 18:54:05 +0100 In-Reply-To: <20260706175415.2604046-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20260706175415.2604046-1-vdonnefort@google.com> X-Mailer: git-send-email 2.55.0.rc2.803.g1fd1e6609c-goog Message-ID: <20260706175415.2604046-9-vdonnefort@google.com> Subject: [PATCH v2 08/18] KVM: arm64: Handle PKVM_HYP_REQ_HYP_ALLOC request 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 Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kernel-team@android.com, qperret@google.com, tabba@google.com, 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-20260706_105437_496822_23F0FEB2 X-CRM114-Status: GOOD ( 10.33 ) 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 Introduce a new pkvm_hyp_request type asking the host to top up the pKVM heap allocator. Signed-off-by: Vincent Donnefort diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h index 0be1469e7874..99daa985856f 100644 --- a/arch/arm64/include/asm/kvm_pkvm.h +++ b/arch/arm64/include/asm/kvm_pkvm.h @@ -205,6 +205,7 @@ struct pkvm_mapping { enum pkvm_hyp_req_type { PKVM_HYP_NO_REQ = 0, + PKVM_HYP_REQ_HYP_ALLOC, __PKVM_HYP_REQ_TYPE_MAX, }; @@ -226,9 +227,13 @@ struct pkvm_hyp_req { static inline size_t pkvm_hyp_req_arg_size(u8 type) { + struct pkvm_hyp_req *req; + switch (type) { case PKVM_HYP_NO_REQ: return 0; + case PKVM_HYP_REQ_HYP_ALLOC: + return sizeof(req->mem); default: WARN_ON(1); } diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c index 5ba8b81b8c6c..adc418076cb0 100644 --- a/arch/arm64/kvm/pkvm.c +++ b/arch/arm64/kvm/pkvm.c @@ -626,6 +626,9 @@ static int pkvm_handle_hyp_req(struct pkvm_hyp_req *req) int ret = -EINVAL; switch (req->type) { + case PKVM_HYP_REQ_HYP_ALLOC: + ret = pkvm_hyp_topup(PKVM_TOPUP_HYP_ALLOC, req->mem.nr_pages); + break; } trace_kvm_handle_pkvm_hyp_req(req, ret); -- 2.55.0.rc2.803.g1fd1e6609c-goog