diff options
Diffstat (limited to 'resources/libreboot/patch/coreboot/369b561315ca68d0cdedc38208105a513c7139b5/grub/kcma-d8/0040-cpu-amd-fam10h-fam15h-Add-CMOS-option-to-disable-CPB.patch')
| -rw-r--r-- | resources/libreboot/patch/coreboot/369b561315ca68d0cdedc38208105a513c7139b5/grub/kcma-d8/0040-cpu-amd-fam10h-fam15h-Add-CMOS-option-to-disable-CPB.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/resources/libreboot/patch/coreboot/369b561315ca68d0cdedc38208105a513c7139b5/grub/kcma-d8/0040-cpu-amd-fam10h-fam15h-Add-CMOS-option-to-disable-CPB.patch b/resources/libreboot/patch/coreboot/369b561315ca68d0cdedc38208105a513c7139b5/grub/kcma-d8/0040-cpu-amd-fam10h-fam15h-Add-CMOS-option-to-disable-CPB.patch deleted file mode 100644 index 0559642..0000000 --- a/resources/libreboot/patch/coreboot/369b561315ca68d0cdedc38208105a513c7139b5/grub/kcma-d8/0040-cpu-amd-fam10h-fam15h-Add-CMOS-option-to-disable-CPB.patch +++ /dev/null @@ -1,53 +0,0 @@ -From 3efdfbd1def5dd2b3bd87ac9ff0bad83c2945eed Mon Sep 17 00:00:00 2001 -From: Timothy Pearson <tpearson@raptorengineeringinc.com> -Date: Tue, 24 Nov 2015 14:12:07 -0600 -Subject: [PATCH 40/45] cpu/amd/fam10h-fam15h: Add CMOS option to disable CPB - (core boost) - -On certain systems and CPUs Core Performance Boost (CPB) may cause -sporadic system lockups. This issue is also somewhat known on the -various proprietary BIOSes, therefore it seems to be a hardware -incompatibility when present. - -Allow the user to disable CBP if needed. - -Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> ---- - src/cpu/amd/family_10h-family_15h/init_cpus.c | 14 ++++++++++++++ - 1 file changed, 14 insertions(+) - -diff --git a/src/cpu/amd/family_10h-family_15h/init_cpus.c b/src/cpu/amd/family_10h-family_15h/init_cpus.c -index e2a1bf3..c1ff240 100644 ---- a/src/cpu/amd/family_10h-family_15h/init_cpus.c -+++ b/src/cpu/amd/family_10h-family_15h/init_cpus.c -@@ -987,6 +987,7 @@ void cpuSetAMDMSR(uint8_t node_id) - u32 platform; - uint64_t revision; - uint8_t enable_c_states; -+ uint8_t enable_cpb; - - printk(BIOS_DEBUG, "cpuSetAMDMSR "); - -@@ -1078,6 +1079,19 @@ void cpuSetAMDMSR(uint8_t node_id) - enable_c_states = 0; - #endif - -+ if (revision & AMD_FAM15_ALL) { -+ enable_cpb = 1; -+ if (get_option(&nvram, "cpu_core_boost") == CB_SUCCESS) -+ enable_cpb = !!nvram; -+ -+ if (!enable_cpb) { -+ /* Disable Core Performance Boost */ -+ msr = rdmsr(0xc0010015); -+ msr.lo |= (0x1 << 25); /* CpbDis = 1 */ -+ wrmsr(0xc0010015, msr); -+ } -+ } -+ - printk(BIOS_DEBUG, " done\n"); - } - --- -2.1.4 - |