From 49058c0adf348342ea23711f018997816da4056b Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Mon, 11 Jun 2012 14:13:09 -0700 Subject: [PATCH] Fix ME hash functions on Panther Point/Cougar Point - On Cougar Point there may have been stack corruption during the ME hash verification - On Panther Point the ME firmware hash was not passed on to the OS Change-Id: I73fc10db63ecff939833fb856a6da1e394155043 Signed-off-by: Stefan Reinauer Reviewed-on: http://review.coreboot.org/1279 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- src/southbridge/intel/bd82x6x/me.c | 2 +- src/southbridge/intel/bd82x6x/me_8.x.c | 16 +++++++++------- 2 files changed, 10 insertions(+), 8 deletions(-) diff --git a/src/southbridge/intel/bd82x6x/me.c b/src/southbridge/intel/bd82x6x/me.c index a1ae06dfd5..1b7b2623c2 100644 --- a/src/southbridge/intel/bd82x6x/me.c +++ b/src/southbridge/intel/bd82x6x/me.c @@ -621,7 +621,7 @@ static int intel_mei_setup(device_t dev) static int intel_me_extend_valid(device_t dev) { struct me_heres status; - u32 extend[] = {0}; + u32 extend[8] = {0}; int i, count = 0; pci_read_dword_ptr(dev, &status, PCI_ME_HERES); diff --git a/src/southbridge/intel/bd82x6x/me_8.x.c b/src/southbridge/intel/bd82x6x/me_8.x.c index 1bb2ce38dc..c7a69fe5c4 100644 --- a/src/southbridge/intel/bd82x6x/me_8.x.c +++ b/src/southbridge/intel/bd82x6x/me_8.x.c @@ -49,6 +49,7 @@ #if CONFIG_CHROMEOS #include +#include #endif #ifndef __SMM__ @@ -622,7 +623,7 @@ static int intel_mei_setup(device_t dev) static int intel_me_extend_valid(device_t dev) { struct me_heres status; - u32 extend; + u32 extend[8] = {0}; int i, count = 0; pci_read_dword_ptr(dev, &status, PCI_ME_HERES); @@ -651,16 +652,17 @@ static int intel_me_extend_valid(device_t dev) return -1; } - /* - * TODO(dlaurie) Verify the hash against a saved good value. - */ - for (i = 0; i < count; ++i) { - extend = pci_read_config32(dev, PCI_ME_HER(i)); - printk(BIOS_DEBUG, "%08x", extend); + extend[i] = pci_read_config32(dev, PCI_ME_HER(i)); + printk(BIOS_DEBUG, "%08x", extend[i]); } printk(BIOS_DEBUG, "\n"); +#if CONFIG_CHROMEOS + /* Save hash in NVS for the OS to verify */ + chromeos_set_me_hash(extend, count); +#endif + return 0; }