[09/15] KVM: SVM: Allocate sd->save_area with __GFP_ZERO

Message ID	20211118110814.2568-10-jiangshanlai@gmail.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <kvm-owner@kernel.org> From: Lai Jiangshan <jiangshanlai@gmail.com> To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, Lai Jiangshan <laijs@linux.alibaba.com>, Paolo Bonzini <pbonzini@redhat.com>, Sean Christopherson <seanjc@google.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com> Subject: [PATCH 09/15] KVM: SVM: Allocate sd->save_area with __GFP_ZERO Date: Thu, 18 Nov 2021 19:08:08 +0800 Message-Id: <20211118110814.2568-10-jiangshanlai@gmail.com> In-Reply-To: <20211118110814.2568-1-jiangshanlai@gmail.com> References: <20211118110814.2568-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	KVM: X86: Miscellaneous cleanups \| expand [00/15] KVM: X86: Miscellaneous cleanups [01/15] KVM: VMX: Use x86 core API to access to fs_base and inactive gs_base [02/15] KVM: VMX: Avoid to rdmsrl(MSR_IA32_SYSENTER_ESP) [03/15] KVM: VMX: Update msr value after kvm_set_user_return_msr() succeeds [04/15] KVM: VMX: Save HOST_CR3 in vmx_prepare_switch_to_guest() [05/15] KVM: VMX: Add document to state that write to uret msr should always be intercepted [06/15] KVM: VMX: Use kvm_set_msr_common() for MSR_IA32_TSC_ADJUST in the default way [07/15] KVM: VMX: Change comments about vmx_get_msr() [08/15] KVM: SVM: Rename get_max_npt_level() to get_npt_level() [09/15] KVM: SVM: Allocate sd->save_area with __GFP_ZERO [10/15] KVM: X86: Skip allocating pae_root for vcpu->arch.guest_mmu when !tdp_enabled [11/15] KVM: X86: Fix comment in __kvm_mmu_create() [12/15] KVM: X86: Remove unused declaration of __kvm_mmu_free_some_pages() [13/15] KVM: X86: Remove useless code to set role.gpte_is_8_bytes when role.direct [14/15] KVM: X86: Calculate quadrant when !role.gpte_is_8_bytes [15/15] KVM: X86: Always set gpte_is_8_bytes when direct map

Message ID

20211118110814.2568-10-jiangshanlai@gmail.com (mailing list archive)

State

New, archived

Headers

From: Lai Jiangshan <jiangshanlai@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: kvm@vger.kernel.org, Lai Jiangshan <laijs@linux.alibaba.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH 09/15] KVM: SVM: Allocate sd->save_area with __GFP_ZERO
Date: Thu, 18 Nov 2021 19:08:08 +0800
Message-Id: <20211118110814.2568-10-jiangshanlai@gmail.com>
In-Reply-To: <20211118110814.2568-1-jiangshanlai@gmail.com>
References: <20211118110814.2568-1-jiangshanlai@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

KVM: X86: Miscellaneous cleanups | expand

Commit Message

Lai Jiangshan Nov. 18, 2021, 11:08 a.m. UTC

From: Lai Jiangshan <laijs@linux.alibaba.com>

And remove clear_page() on it.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
 arch/x86/kvm/svm/svm.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 33b434fd5d9b..d855ba664fc2 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -585,12 +585,10 @@  static int svm_cpu_init(int cpu)
 	if (!sd)
 		return ret;
 	sd->cpu = cpu;
-	sd->save_area = alloc_page(GFP_KERNEL);
+	sd->save_area = alloc_page(GFP_KERNEL | __GFP_ZERO);
 	if (!sd->save_area)
 		goto free_cpu_data;
 
-	clear_page(page_address(sd->save_area));
-
 	ret = sev_cpu_init(sd);
 	if (ret)
 		goto free_save_area;

[09/15] KVM: SVM: Allocate sd->save_area with __GFP_ZERO

Commit Message

Patch