Merge branch 'x86-txt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip (3ae684e1) · Commits · EulixOS / Software / Kernel

Documentation/intel_txt.txt

+9 −7

Original line number	Diff line number	Diff line
		@@ -161,13 +161,15 @@ o In order to put a system into any of the sleep states after a TXT
		has been restored, it will restore the TPM PCRs and then
		transfer control back to the kernel's S3 resume vector.
		In order to preserve system integrity across S3, the kernel
		provides tboot with a set of memory ranges (kernel
		code/data/bss, S3 resume code, and AP trampoline) that tboot
		will calculate a MAC (message authentication code) over and then
		seal with the TPM. On resume and once the measured environment
		has been re-established, tboot will re-calculate the MAC and
		verify it against the sealed value. Tboot's policy determines
		what happens if the verification fails.
		provides tboot with a set of memory ranges (RAM and RESERVED_KERN
		in the e820 table, but not any memory that BIOS might alter over
		the S3 transition) that tboot will calculate a MAC (message
		authentication code) over and then seal with the TPM. On resume
		and once the measured environment has been re-established, tboot
		will re-calculate the MAC and verify it against the sealed value.
		Tboot's policy determines what happens if the verification fails.
		Note that the c/s 194 of tboot which has the new MAC code supports
		this.

		That's pretty much it for TXT support.

+11 −0

Original line number	Diff line number	Diff line
		@@ -2953,6 +2953,17 @@ S: Odd Fixes
		F: Documentation/networking/README.ipw2200
		F: drivers/net/wireless/ipw2x00/ipw2200.*

		INTEL(R) TRUSTED EXECUTION TECHNOLOGY (TXT)
		M: Joseph Cihula <joseph.cihula@intel.com>
		M: Shane Wang <shane.wang@intel.com>
		L: tboot-devel@lists.sourceforge.net
		W: http://tboot.sourceforge.net
		T: Mercurial http://www.bughost.org/repos.hg/tboot.hg
		S: Supported
		F: Documentation/intel_txt.txt
		F: include/linux/tboot.h
		F: arch/x86/kernel/tboot.c

		INTEL WIRELESS WIMAX CONNECTION 2400
		M: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
		M: linux-wimax@intel.com

+6 −1

Original line number	Diff line number	Diff line
		@@ -45,7 +45,12 @@
		#define E820_NVS 4
		#define E820_UNUSABLE 5

		/* reserved RAM used by kernel itself */
		/*
		* reserved RAM used by kernel itself
		* if CONFIG_INTEL_TXT is enabled, memory of this type will be
		* included in the S3 integrity calculation and so should not include
		* any memory that BIOS might alter over the S3 transition
		*/
		#define E820_RESERVED_KERN 128

		#ifndef __ASSEMBLY__

+11 −9

Original line number	Diff line number	Diff line
		@@ -175,6 +175,9 @@ static void add_mac_region(phys_addr_t start, unsigned long size)
		struct tboot_mac_region *mr;
		phys_addr_t end = start + size;

		if (tboot->num_mac_regions >= MAX_TB_MAC_REGIONS)
		panic("tboot: Too many MAC regions\n");

		if (start && size) {
		mr = &tboot->mac_regions[tboot->num_mac_regions++];
		mr->start = round_down(start, PAGE_SIZE);
		@@ -184,18 +187,17 @@ static void add_mac_region(phys_addr_t start, unsigned long size)

		static int tboot_setup_sleep(void)
		{
		int i;

		tboot->num_mac_regions = 0;

		/* S3 resume code */
		add_mac_region(acpi_wakeup_address, WAKEUP_SIZE);
		for (i = 0; i < e820.nr_map; i++) {
		if ((e820.map[i].type != E820_RAM)
		&& (e820.map[i].type != E820_RESERVED_KERN))
		continue;

		#ifdef CONFIG_X86_TRAMPOLINE
		/* AP trampoline code */
		add_mac_region(virt_to_phys(trampoline_base), TRAMPOLINE_SIZE);
		#endif

		/* kernel code + data + bss */
		add_mac_region(virt_to_phys(_text), _end - _text);
		add_mac_region(e820.map[i].addr, e820.map[i].size);
		}

		tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address;