shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

powerpc/powernv: Query firmware for count cache flush settings

Browse Source 
commit 99d54754d3 upstream.

Look for fw-features properties to determine the appropriate settings
for the count cache flush, and then call the generic powerpc code to
set it up based on the security feature flags.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michael Ellerman
2019-04-11 21:46:17 +10:00
committed by Greg Kroah-Hartman
parent e745d1518d
commit ae361096d6
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/powerpc/platforms/powernv/setup.c
View File

@@ -77,6 +77,12 @@ static void init_fw_feat_flags(struct device_node *np)
if (fw_feature_is("enabled", "fw-count-cache-disabled", np))
security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
if (fw_feature_is("enabled", "fw-count-cache-flush-bcctr2,0,0", np))
security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
if (fw_feature_is("enabled", "needs-count-cache-flush-on-context-switch", np))
security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
/*
* The features below are enabled by default, so we instead look to see
* if firmware has *disabled* them, and clear them if so.
@@ -123,6 +129,7 @@ static void pnv_setup_rfi_flush(void)
security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV));
setup_rfi_flush(type, enable);
setup_count_cache_flush();
}
static void __init pnv_setup_arch(void)