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Tue, 09 Oct 2018 13:22:40 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w99DMZ0N016144 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Oct 2018 13:22:35 GMT Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w99DMXOr031341; Tue, 9 Oct 2018 13:22:33 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 09 Oct 2018 13:22:32 +0000 Subject: Re: [PATCH v4 3/3] x86/acpi: take rsdp address for boot params if available To: Juergen Gross , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org, linux-doc@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, corbet@lwn.net References: <20181009105437.5471-1-jgross@suse.com> <20181009105437.5471-4-jgross@suse.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0 MIME-Version: 1.0 In-Reply-To: <20181009105437.5471-4-jgross@suse.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9040 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810090132 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/9/18 6:54 AM, Juergen Gross wrote: > + > +u64 x86_default_get_root_pointer(void) > +{ > + return boot_params.hdr.acpi_rsdp_addr; > +} Should we then update init_pvh_bootparams() with     pvh_bootparams.hdr.acpi_rsdp_addr = pvh_start_info.rsdp_paddr; (and drop x86_init.acpi.get_root_pointer = pvh_get_root_pointer;) ? -boris > diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c > index 2792b5573818..50a2b492fdd6 100644 > --- a/arch/x86/kernel/x86_init.c > +++ b/arch/x86/kernel/x86_init.c > @@ -31,7 +31,6 @@ static int __init iommu_init_noop(void) { return 0; } > static void iommu_shutdown_noop(void) { } > static bool __init bool_x86_init_noop(void) { return false; } > static void x86_op_int_noop(int cpu) { } > -static u64 u64_x86_init_noop(void) { return 0; } > > /* > * The platform setup functions are preset with the default functions > @@ -96,7 +95,7 @@ struct x86_init_ops x86_init __initdata = { > }, > > .acpi = { > - .get_root_pointer = u64_x86_init_noop, > + .get_root_pointer = x86_default_get_root_pointer, > .reduced_hw_early_init = acpi_generic_reduced_hw_init, > }, > };