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authorAamir Bohra <aamir.bohra@intel.com>2020-07-16 09:03:06 +0530
committerPatrick Georgi <pgeorgi@google.com>2020-09-14 07:02:26 +0000
commitc1d227d3120470a9e0b0d9d6f58d334782117820 (patch)
tree6a9ccc01bd28988187346c64184468a36bc800bf /src/soc/intel/denverton_ns/Kconfig
parent1ba86f685b87c2467518eb04beaa36f16349570f (diff)
downloadcoreboot-c1d227d3120470a9e0b0d9d6f58d334782117820.tar.xz
soc/intel/common/cpu: Update COS mask calculation for NEM enhanced mode
Update the COS mask calculation to accomodate the RW data as per SoC configuration. Currently only one way is allocated for RW data and configured for non-eviction. For earlier platform this served fine, and could accomodate a RW data up to 256Kb. Starting TGL and JSL, the DCACHE_RAM_SIZE is configured for 512Kb, which cannot be mapped to a single way. Hence update the number of ways to be configured for non- eviction as per total LLC size. The total LLC size/ number of ways gives the way size. DCACHE_RAM_SIZE/ way size gives the number of ways that need to be configured for non- eviction, instead of harcoding it to 1. TGL uses MSR IA32_CR_SF_QOS_MASK_1(0x1891) and IA32_CR_SF_QOS_MASK_2(0x1892) as COS mask selection register and hence needs to be progarmmed accordingly. Also JSL and TGL platforms the COS mask selection is mapped to bit 32:33 of MSR IA32_PQR_ASSOC(0xC8F) and need to be updated in edx(maps 63:32) before MSR write instead of eax(maps 31:0). This implementation corrects that as well. BUG=b:149273819 TEST= Boot waddledoo(JSL), hatch(CML), Volteer(TGL)with NEM enhanced CAR configuration. Signed-off-by: Aamir Bohra <aamir.bohra@intel.com> Change-Id: I54e047161853bfc70516c1d607aa479e68836d04 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43494 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Shreesh Chhabbi <shreesh.chhabbi@intel.corp-partner.google.com> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc/intel/denverton_ns/Kconfig')
-rw-r--r--src/soc/intel/denverton_ns/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/soc/intel/denverton_ns/Kconfig b/src/soc/intel/denverton_ns/Kconfig
index 33635b3f63..91b45dc258 100644
--- a/src/soc/intel/denverton_ns/Kconfig
+++ b/src/soc/intel/denverton_ns/Kconfig
@@ -161,7 +161,7 @@ config DENVERTON_NS_CAR_NEM_ENHANCED
depends on !FSP_CAR
default y
select SOC_INTEL_COMMON_BLOCK_CAR
- select INTEL_CAR_NEM_ENHANCED
+ select USE_CAR_NEM_ENHANCED_V1
help
A current limitation of NEM (Non-Evict mode) is that code and data sizes
are derived from the requirement to not write out any modified cache line.