From e89e72d2f8a2efe86acad95ed0769aa7a8fe64ae Mon Sep 17 00:00:00 2001 From: Patrick Williams Date: Tue, 26 Mar 2013 11:23:47 -0500 Subject: Secureboot memory layout support. * Start kernel in 1/4 cache mode per Secureboot. * Copy Secureboot header for base image for later use. * Blind-purge bottom half of cache. * Add bottom of cache into memory maps for 1/2 cache mode. RTC: 64762 Change-Id: I1b45f30a2d45c9709d4fd486cfe0ca2ce86b051c Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/3773 Reviewed-by: Michael Baiocchi Tested-by: Jenkins Server Reviewed-by: ADAM R. MUHLE Reviewed-by: Daniel M. Crowell Reviewed-by: A. Patrick Williams III --- src/usr/secureboot/base/header.C | 57 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 src/usr/secureboot/base/header.C (limited to 'src/usr/secureboot/base/header.C') diff --git a/src/usr/secureboot/base/header.C b/src/usr/secureboot/base/header.C new file mode 100644 index 000000000..00f808e1b --- /dev/null +++ b/src/usr/secureboot/base/header.C @@ -0,0 +1,57 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/usr/secureboot/base/header.C $ */ +/* */ +/* IBM CONFIDENTIAL */ +/* */ +/* COPYRIGHT International Business Machines Corp. 2013 */ +/* */ +/* p1 */ +/* */ +/* Object Code Only (OCO) source materials */ +/* Licensed Internal Code Source Materials */ +/* IBM HostBoot Licensed Internal Code */ +/* */ +/* The source code for this program is not published or otherwise */ +/* divested of its trade secrets, irrespective of what has been */ +/* deposited with the U.S. Copyright Office. */ +/* */ +/* Origin: 30 */ +/* */ +/* IBM_PROLOG_END_TAG */ +#include "header.H" +#include +#include +#include + +namespace SECUREBOOT +{ + void Header::loadBaseHeader() + { + // Calculate original address of the secureboot header. + // Zero is purposefully not mapped into the VMM tables, so we + // can't use that for the virtual-to-real translation. Since + // this object is in the base image, EA = HRMOR | PA, so we can + // use PA - EA to find the HRMOR. + uint64_t addr = mm_virt_to_phys(this) - + reinterpret_cast(this); + addr -= PAGESIZE; + + // Map in the header. + void* origHeader = mm_block_map(reinterpret_cast(addr), + PAGESIZE); + + // Copy header to a save area. + // In the future we might want to just extract pieces of the + // header. The header is important when we start updating + // the TPM PCRs. + iv_data = malloc(PAGESIZE); + memcpy(iv_data, origHeader, PAGESIZE); + + // Unmap the header. + mm_block_unmap(origHeader); + + return; + } +} -- cgit v1.2.3