UefiCpuPkg/PiSmmCpuDxeSmm: Fix memory protection crash
authorStar Zeng <star.zeng@intel.com>
Thu, 24 Aug 2017 02:59:14 +0000 (10:59 +0800)
committerStar Zeng <star.zeng@intel.com>
Mon, 28 Aug 2017 01:35:16 +0000 (09:35 +0800)
commit714c2603018a99a514c42c2b511c821f30ba9cdf
tree7298a0c6fccb30214023002971c59980aba4026f
parent9f3a38cdfb354a5a074312783a43b7bd21cc90e2
UefiCpuPkg/PiSmmCpuDxeSmm: Fix memory protection crash

https://bugzilla.tianocore.org/show_bug.cgi?id=624 reports
memory protection crash in PiSmmCpuDxeSmm, Ia32 build with
RAM above 4GB (of which 2GB are placed in 64-bit address).
It is because UEFI builds identity mapping page tables,
>4G address is not supported at Ia32 build.

This patch is to get the PhysicalAddressBits that is used
to build in PageTbl.c(Ia32/X64), and use it to check whether
the address is supported or not in ConvertMemoryPageAttributes().

With this patch, the debug messages will be like below.
UefiMemory protection: 0x0 - 0x9F000 Success
UefiMemory protection: 0x100000 - 0x807000 Success
UefiMemory protection: 0x808000 - 0x810000 Success
UefiMemory protection: 0x818000 - 0x820000 Success
UefiMemory protection: 0x1510000 - 0x7B798000 Success
UefiMemory protection: 0x7B79B000 - 0x7E538000 Success
UefiMemory protection: 0x7E539000 - 0x7E545000 Success
UefiMemory protection: 0x7E55A000 - 0x7E61F000 Success
UefiMemory protection: 0x7E62B000 - 0x7F6AB000 Success
UefiMemory protection: 0x7F703000 - 0x7F70B000 Success
UefiMemory protection: 0x7F70F000 - 0x7F778000 Success
UefiMemory protection: 0x100000000 - 0x180000000 Unsupported

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Eric Dong <eric.dong@intel.com>
Originally-suggested-by: Jiewen Yao <jiewen.yao@intel.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c