cpu/intel/model_206ax: Lock MSR_PP_CURRENT_CONFIG
Now that those registers are only written once set the lock bit to protect it from runtime changes. TEST: Lenovo X220 still boots. Change-Id: I4c56a3cb322a0e75eb3dd366808068093928e10c Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/78608 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
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committed by
Felix Held
parent
ea04a53e69
commit
8685205ad1
@@ -73,8 +73,10 @@
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#define PKG_POWER_LIMIT_TIME_MASK 0x7f
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#define MSR_PP0_CURRENT_CONFIG 0x601
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#define PP0_CURRENT_LIMIT_LOCK (1U << 31)
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#define PP0_CURRENT_LIMIT (112 << 3) /* 112 A */
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#define MSR_PP1_CURRENT_CONFIG 0x602
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#define PP1_CURRENT_LIMIT_LOCK (1U << 31)
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#define PP1_CURRENT_LIMIT_SNB (35 << 3) /* 35 A */
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#define PP1_CURRENT_LIMIT_IVB (50 << 3) /* 50 A */
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#define MSR_PKG_POWER_SKU_UNIT 0x606
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@@ -206,6 +206,7 @@ static void configure_c_states(void)
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msr = rdmsr(MSR_PP0_CURRENT_CONFIG);
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msr.lo &= ~0x1fff;
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msr.lo |= PP0_CURRENT_LIMIT;
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msr.lo |= PP0_CURRENT_LIMIT_LOCK;
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wrmsr(MSR_PP0_CURRENT_CONFIG, msr);
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/* Secondary Plane Current Limit */
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@@ -215,6 +216,7 @@ static void configure_c_states(void)
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msr.lo |= PP1_CURRENT_LIMIT_IVB;
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else
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msr.lo |= PP1_CURRENT_LIMIT_SNB;
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msr.lo |= PP1_CURRENT_LIMIT_LOCK;
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wrmsr(MSR_PP1_CURRENT_CONFIG, msr);
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}
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}
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