From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io, jiaxin.wu@intel.com
Cc: Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
Zeng Star <star.zeng@intel.com>,
Rahul Kumar <rahul1.kumar@intel.com>
Subject: Re: [edk2-devel] [PATCH v1 1/3] UefiCpuPkg/SecCore: Migrate page table to permanent memory
Date: Tue, 9 May 2023 16:39:07 +0200 [thread overview]
Message-ID: <qcwjegi2a3lbxpk6sn4ckx2cqhglempstpoldkkcfw5xyupqmq@3e7s7gx3zjdr> (raw)
In-Reply-To: <20230509102253.16632-2-jiaxin.wu@intel.com>
Hi,
> + if (PagingMode == Paging4Level1GB || PagingMode == Paging4Level) {
> + //
> + // The max lineaddress bits is 48 for 4 level page table.
> + //
> + VirPhyAddressSize.Bits.PhysicalAddressBits = MIN (VirPhyAddressSize.Bits.PhysicalAddressBits, 48);
> + }
virtual addresses in long mode are sign-extended. Which means you have
only 47 bits (or 56 bits with 5-level paging) for identity mappings.
take care,
Gerd
next prev parent reply other threads:[~2023-05-09 14:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-09 10:22 [PATCH v1 0/3] Target to enable paging from temporary RAM Done Wu, Jiaxin
2023-05-09 10:22 ` [PATCH v1 1/3] UefiCpuPkg/SecCore: Migrate page table to permanent memory Wu, Jiaxin
2023-05-09 14:39 ` Gerd Hoffmann [this message]
2023-05-10 2:00 ` [edk2-devel] " Wu, Jiaxin
2023-05-10 2:44 ` Ni, Ray
2023-05-10 2:48 ` Ni, Ray
2023-05-10 7:48 ` Gerd Hoffmann
2023-05-11 5:08 ` Wu, Jiaxin
2023-05-11 7:47 ` Ni, Ray
2023-05-12 2:19 ` Wu, Jiaxin
2023-05-11 5:36 ` Ni, Ray
2023-05-10 7:50 ` Ni, Ray
2023-05-09 10:22 ` [PATCH v1 2/3] UefiCpuPkg/CpuMpPei: Enable PAE page table if CR0.PG is not set Wu, Jiaxin
2023-05-09 14:41 ` [edk2-devel] " Gerd Hoffmann
2023-05-10 1:56 ` Wu, Jiaxin
2023-05-10 7:59 ` Ni, Ray
2023-05-09 10:22 ` [PATCH v1 3/3] MdeModulePkg/DxeIpl: Align Page table Level setting with previous level Wu, Jiaxin
2023-05-09 14:44 ` [edk2-devel] " Gerd Hoffmann
2023-05-10 1:56 ` Wu, Jiaxin
2023-05-10 7:51 ` Gerd Hoffmann
2023-05-10 8:01 ` Ni, Ray
2023-05-09 14:46 ` [edk2-devel] [PATCH v1 0/3] Target to enable paging from temporary RAM Done Gerd Hoffmann
2023-05-10 1:58 ` Wu, Jiaxin
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