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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-01-08 17:31:49 -0600 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-02-06 19:46:04 +1100 |
| commit | 608b42140e966a65cabc68d997875065f3e63c2f (patch) | |
| tree | 081498a2c7328900adb4e8084454fc76694dfaf9 /arch/powerpc/kernel/setup_64.c | |
| parent | 65e01f386fcddb3460be78fc886856889f80ecc7 (diff) | |
| download | linux-608b42140e966a65cabc68d997875065f3e63c2f.tar.gz linux-608b42140e966a65cabc68d997875065f3e63c2f.tar.bz2 linux-608b42140e966a65cabc68d997875065f3e63c2f.zip | |
powerpc/64: Hard code cache geometry on POWER8
All shipping firmware versions have it wrong in the device-tree
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index db18f7b68a1d..364fbffd7e83 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -472,11 +472,27 @@ static bool __init parse_cache_info(struct device_node *np, void __init initialize_cache_info(void) { - struct device_node *cpu, *l2, *l3 = NULL; + struct device_node *cpu = NULL, *l2, *l3 = NULL; + u32 pvr; DBG(" -> initialize_cache_info()\n"); - cpu = of_find_node_by_type(NULL, "cpu"); + /* + * All shipping POWER8 machines have a firmware bug that + * puts incorrect information in the device-tree. This will + * be (hopefully) fixed for future chips but for now hard + * code the values if we are running on one of these + */ + pvr = PVR_VER(mfspr(SPRN_PVR)); + if (pvr == PVR_POWER8 || pvr == PVR_POWER8E || + pvr == PVR_POWER8NVL) { + /* size lsize blk sets */ + init_cache_info(&ppc64_caches.l1i, 0x8000, 128, 128, 32); + init_cache_info(&ppc64_caches.l1d, 0x10000, 128, 128, 64); + init_cache_info(&ppc64_caches.l2, 0x80000, 128, 0, 512); + init_cache_info(&ppc64_caches.l3, 0x800000, 128, 0, 8192); + } else + cpu = of_find_node_by_type(NULL, "cpu"); /* * We're assuming *all* of the CPUs have the same |