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authorCliff Wickman <cpw@sgi.com>2012-06-07 08:31:40 -0500
committerIngo Molnar <mingo@kernel.org>2012-06-08 11:48:28 +0200
commitd5d2d2eea84b0d8450b082edbc3dbde41fb8bfd8 (patch)
tree786ce4416a69407aa3ebb95f98b1475b46c9f204 /arch/x86/platform
parentbd2753b2dda7bb43c7468826de75f49c6a7e8965 (diff)
downloadop-kernel-dev-d5d2d2eea84b0d8450b082edbc3dbde41fb8bfd8.zip
op-kernel-dev-d5d2d2eea84b0d8450b082edbc3dbde41fb8bfd8.tar.gz
x86/uv: Fix UV2 BAU legacy mode
The SGI Altix UV2 BAU (Broadcast Assist Unit) as used for tlb-shootdown (selective broadcast mode) always uses UV2 broadcast descriptor format. There is no need to clear the 'legacy' (UV1) mode, because the hardware always uses UV2 mode for selective broadcast. But the BIOS uses general broadcast and legacy mode, and the hardware pays attention to the legacy mode bit for general broadcast. So the kernel must not clear that mode bit. Signed-off-by: Cliff Wickman <cpw@sgi.com> Cc: <stable@kernel.org> Link: http://lkml.kernel.org/r/E1SccoO-0002Lh-Cb@eag09.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/platform')
-rw-r--r--arch/x86/platform/uv/tlb_uv.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 3ae0e61..59880af 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -1295,7 +1295,6 @@ static void __init enable_timeouts(void)
*/
mmr_image |= (1L << SOFTACK_MSHIFT);
if (is_uv2_hub()) {
- mmr_image &= ~(1L << UV2_LEG_SHFT);
mmr_image |= (1L << UV2_EXT_SHFT);
}
write_mmr_misc_control(pnode, mmr_image);
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