From patchwork Mon May 6 03:11:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li RongQing X-Patchwork-Id: 13654869 Received: from njjs-sys-mailin01.njjs.baidu.com (mx315.baidu.com [180.101.52.204]) by smtp.subspace.kernel.org (Postfix) with ESMTP id AB9B338DFB for ; Mon, 6 May 2024 03:19:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=180.101.52.204 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714965550; cv=none; b=kuwBkFX6rk8cP4yPLU8wRfVCUUO9BmzsqjKItwBygTyXQ0Jge5G+aGZ3NivY2xsllMZLFtKt9gVm6fzw2VNOXC80C0mnrVO4nQvwO1i/8B+wj1Im5TpGP/kzfSnvpqfX4jhamucaV/oI4/zLTTrOFs90fGiws8bSjXRr+twtSss= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714965550; c=relaxed/simple; bh=6i9dKdkzd1XUYVGG44haxEErePBysu8/ttJswrKDBdQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=aU/eZrSvodN8Un+scA9WpNVZua+6ZUglZgjcHb+91l8x/yTDnO3f8j4FrkYis3ZuJKIFX8nOZhy+MNEhddoaycMuk30IFEHOTwReoOcTs5jeErdcZGc8SWCqTf6onY6tgOdvEq/6Fxh9lwBBjLwaQ+Rg3QzVFfoQCn9DSsSMONs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=baidu.com; spf=pass smtp.mailfrom=baidu.com; arc=none smtp.client-ip=180.101.52.204 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=baidu.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baidu.com Received: from localhost (bjhw-sys-rpm015653cc5.bjhw.baidu.com [10.227.53.39]) by njjs-sys-mailin01.njjs.baidu.com (Postfix) with ESMTP id D53697F0005E; Mon, 6 May 2024 11:11:12 +0800 (CST) From: Li RongQing To: seanjc@google.com, pbonzini@redhat.com, kvm@vger.kernel.org, thomas.lendacky@amd.com, yosryahmed@google.com, pgonda@google.com Cc: Li RongQing Subject: [PATCH 3/3] KVM: SVM: Consider NUMA affinity when allocating per-CPU save_area Date: Mon, 6 May 2024 11:11:06 +0800 Message-Id: <20240506031106.3894-4-lirongqing@baidu.com> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20240506031106.3894-1-lirongqing@baidu.com> References: <20240506031106.3894-1-lirongqing@baidu.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: save_area of per-CPU svm_data is dominantly accessed from their own local CPUs, allocate them node-local for performance reason so rename __snp_safe_alloc_page as snp_safe_alloc_page_node which accepts numa node id as input parameter, svm_cpu_init calls it with node id switched from cpu id Signed-off-by: Li RongQing --- arch/x86/kvm/svm/sev.c | 6 +++--- arch/x86/kvm/svm/svm.c | 2 +- arch/x86/kvm/svm/svm.h | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 24608a2..8a19dd8 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3179,13 +3179,13 @@ void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, 1); } -struct page *__snp_safe_alloc_page(gfp_t gfp) +struct page *snp_safe_alloc_page_node(int node, gfp_t gfp) { unsigned long pfn; struct page *p; if (!cc_platform_has(CC_ATTR_HOST_SEV_SNP)) - return alloc_page(gfp | __GFP_ZERO); + return alloc_pages_node(node, gfp | __GFP_ZERO, 0); /* * Allocate an SNP-safe page to workaround the SNP erratum where @@ -3196,7 +3196,7 @@ struct page *__snp_safe_alloc_page(gfp_t gfp) * Allocate one extra page, choose a page which is not * 2MB-aligned, and free the other. */ - p = alloc_pages(gfp | __GFP_ZERO, 1); + p = alloc_pages_node(node, gfp | __GFP_ZERO, 1); if (!p) return NULL; diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index c01dc9b..8df05f2 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -703,7 +703,7 @@ static int svm_cpu_init(int cpu) int ret = -ENOMEM; memset(sd, 0, sizeof(struct svm_cpu_data)); - sd->save_area = __snp_safe_alloc_page(GFP_KERNEL); + sd->save_area = snp_safe_alloc_page_node(cpu_to_node(cpu), GFP_KERNEL); if (!sd->save_area) return ret; diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index bbea3ee..982e42b 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -695,11 +695,11 @@ void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector); void sev_es_prepare_switch_to_guest(struct sev_es_save_area *hostsa); void sev_es_unmap_ghcb(struct vcpu_svm *svm); -struct page *__snp_safe_alloc_page(gfp_t gfp); +struct page *snp_safe_alloc_page_node(int node, gfp_t gfp); static inline struct page *snp_safe_alloc_page(void) { - return __snp_safe_alloc_page(GFP_KERNEL_ACCOUNT); + return snp_safe_alloc_page_node(numa_node_id(), GFP_KERNEL_ACCOUNT); } /* vmenter.S */