linux-kernel - Re: [PATCH v2 1/7] KVM: selftests: x86: Add a working xstate data structure

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Message-ID: <Y/He1Sro3hb7Hn0h@gao-cwp>
Date:   Sun, 19 Feb 2023 16:33:25 +0800
From:   Chao Gao <chao.gao@...el.com>
To:     Mingwei Zhang <mizhang@...gle.com>
CC:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>, <kvm@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Jim Mattson" <jmattson@...gle.com>,
        Venkatesh Srinivas <venkateshs@...gle.com>,
        Aaron Lewis <aaronlewis@...gle.com>,
        "Chang S. Bae" <chang.seok.bae@...el.com>
Subject: Re: [PATCH v2 1/7] KVM: selftests: x86: Add a working xstate data
 structure

On Tue, Feb 14, 2023 at 06:46:00PM +0000, Mingwei Zhang wrote:
>-	/* xsave data for guest_code */
>-	xsavedata = vm_vaddr_alloc_pages(vm, 3);
>-	memset(addr_gva2hva(vm, xsavedata), 0, 3 * getpagesize());
>-	vcpu_args_set(vcpu, 3, amx_cfg, tiledata, xsavedata);
>+	/* XSAVE state for guest_code */
>+	xstate = vm_vaddr_alloc_pages(vm, DIV_ROUND_UP(XSAVE_SIZE, PAGE_SIZE));
>+	memset(addr_gva2hva(vm, xstate), 0, DIV_ROUND_UP(XSAVE_SIZE, PAGE_SIZE));

					    ^ this should be the size in bytes instead of in pages. Right?