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Commit 4a727429 authored by Ashley Lai's avatar Ashley Lai Committed by Kent Yoder
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PPC64: Add support for instantiating SML from Open Firmware 



This patch instantiate Stored Measurement Log (SML) and put the
log address and size in the device tree.

Signed-off-by: default avatarAshley Lai <adlai@us.ibm.com>
Signed-off-by: default avatarKent Yoder <key@linux.vnet.ibm.com>
parent 132f7629

arch/powerpc/kernel/prom_init.c

+62 −0
Original line number Diff line number Diff line
@@ -1623,6 +1623,63 @@ static void __init prom_instantiate_rtas(void) 
}



#ifdef CONFIG_PPC64

/*

 * Allocate room for and instantiate Stored Measurement Log (SML)

 */

static void __init prom_instantiate_sml(void)

{

	phandle ibmvtpm_node;

	ihandle ibmvtpm_inst;

	u32 entry = 0, size = 0;

	u64 base;



	prom_debug("prom_instantiate_sml: start...\n");



	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));

	prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);

	if (!PHANDLE_VALID(ibmvtpm_node))

		return;



	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));

	if (!IHANDLE_VALID(ibmvtpm_inst)) {

		prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);

		return;

	}



	if (call_prom_ret("call-method", 2, 2, &size,

			  ADDR("sml-get-handover-size"),

			  ibmvtpm_inst) != 0 || size == 0) {

		prom_printf("SML get handover size failed\n");

		return;

	}



	base = alloc_down(size, PAGE_SIZE, 0);

	if (base == 0)

		prom_panic("Could not allocate memory for sml\n");



	prom_printf("instantiating sml at 0x%x...", base);



	if (call_prom_ret("call-method", 4, 2, &entry,

			  ADDR("sml-handover"),

			  ibmvtpm_inst, size, base) != 0 || entry == 0) {

		prom_printf("SML handover failed\n");

		return;

	}

	prom_printf(" done\n");



	reserve_mem(base, size);



	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",

		     &base, sizeof(base));

	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",

		     &size, sizeof(size));



	prom_debug("sml base     = 0x%x\n", base);

	prom_debug("sml size     = 0x%x\n", (long)size);



	prom_debug("prom_instantiate_sml: end...\n");

}



/*

 * Allocate room for and initialize TCE tables

 */
@@ -2916,6 +2973,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, 
		prom_instantiate_opal();

#endif



#ifdef CONFIG_PPC64

	/* instantiate sml */

	prom_instantiate_sml();

#endif



	/*

	 * On non-powermacs, put all CPUs in spin-loops.

	 *