From 742c00331e5a12d1565e75e035f9f345b51914e5 Mon Sep 17 00:00:00 2001 From: Leah Rowe Date: Sun, 5 Nov 2023 11:58:19 +0000 Subject: coreboot/dell: move e6400 to new tree, dell the ddr2 fix broke *ddr3* on gm45 thinkpads in testing, depending on memory modules. this was established by removing patches, re-doing configs etc, on a user's X200 (testing gentoo and freebsd). the X200 kept randomly rebooting or having random glitches. the configs themselves (gm45 thinkpads) will also be re-done, because i found minor issues unrelated, but this patch moves dell e6400 to its own tree. the ddr2 fix is no longer present in coreboot/default, only coreboot/dell. i noticed minor differences in gm45 thinkpad configs, when re-doing the configs, versus what are currently in lbmk master; for instance, vbt was not enabled anymore, on thinkpad x200. modifications to these will be done separately. Signed-off-by: Leah Rowe --- ...ep-on-x200-t400-Revert-cpu-intel-model_10.patch | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 config/coreboot/dell/patches/0016-fix-speedstep-on-x200-t400-Revert-cpu-intel-model_10.patch (limited to 'config/coreboot/dell/patches/0016-fix-speedstep-on-x200-t400-Revert-cpu-intel-model_10.patch') diff --git a/config/coreboot/dell/patches/0016-fix-speedstep-on-x200-t400-Revert-cpu-intel-model_10.patch b/config/coreboot/dell/patches/0016-fix-speedstep-on-x200-t400-Revert-cpu-intel-model_10.patch new file mode 100644 index 00000000..0f9b192d --- /dev/null +++ b/config/coreboot/dell/patches/0016-fix-speedstep-on-x200-t400-Revert-cpu-intel-model_10.patch @@ -0,0 +1,47 @@ +From 3ec06fa2393995b87af1dbc0387c5d3255d5c0db Mon Sep 17 00:00:00 2001 +From: Leah Rowe +Date: Wed, 1 Dec 2021 02:53:00 +0000 +Subject: [PATCH 16/22] fix speedstep on x200/t400: Revert + "cpu/intel/model_1067x: enable PECI" + +This reverts commit 70fea013c7ebd6d85a7806748233fcfd76802f5f. + +Enabling PECI without microcode updates loaded causes the CPUID feature set +to become corrupted. And one consequence is broken SpeedStep. At least, that's +my understanding looking at Intel Errata. This revert is not a fix, because +upstream is correct (upstream assumes microcode updates). We will simply +maintain this revert patch in Libreboot, from now on. +--- + src/cpu/intel/model_1067x/model_1067x_init.c | 9 --------- + 1 file changed, 9 deletions(-) + +diff --git a/src/cpu/intel/model_1067x/model_1067x_init.c b/src/cpu/intel/model_1067x/model_1067x_init.c +index 315e7c36fc..1423fd72bc 100644 +--- a/src/cpu/intel/model_1067x/model_1067x_init.c ++++ b/src/cpu/intel/model_1067x/model_1067x_init.c +@@ -141,8 +141,6 @@ static void configure_emttm_tables(void) + wrmsr(MSR_EMTTM_CR_TABLE(5), msr); + } + +-#define IA32_PECI_CTL 0x5a0 +- + static void configure_misc(const int eist, const int tm2, const int emttm) + { + msr_t msr; +@@ -185,13 +183,6 @@ static void configure_misc(const int eist, const int tm2, const int emttm) + msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */ + wrmsr(IA32_MISC_ENABLE, msr); + } +- +- /* Enable PECI +- WARNING: due to Erratum AW67 described in Intel document #318733 +- the microcode must be updated before this MSR is written to. */ +- msr = rdmsr(IA32_PECI_CTL); +- msr.lo |= 1; +- wrmsr(IA32_PECI_CTL, msr); + } + + #define PIC_SENS_CFG 0x1aa +-- +2.39.2 + -- cgit v1.2.1