Attachment 120049 Details for Bug 92975 – 0001-SKL-Use-kernel-defined-MOCS-values-instead-of-assumi.patch

[patch] 0001-SKL-Use-kernel-defined-MOCS-values-instead-of-assumi.patch

0001-SKL-Use-kernel-defined-MOCS-values-instead-of-assumi.patch (text/plain), 982 bytes, created by Francisco Jerez on 2015-11-23 14:59:25 UTC

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Creator: Francisco Jerez

Created: 2015-11-23 14:59:25 UTC

Size: 982 bytes

patch

obsolete

>From 6654499e4c166886c22535e12b3018447988de04 Mon Sep 17 00:00:00 2001
>From: Francisco Jerez <currojerez@riseup.net>
>Date: Mon, 23 Nov 2015 16:52:20 +0200
>Subject: [PATCH] SKL: Use kernel-defined MOCS values instead of assuming
> hardware defaults.
>
>Fixes a performance regression with v4.3 kernels on Gen9 hardware (see
>https://bugs.freedesktop.org/show_bug.cgi?id=92975).
>
>Signed-off-by: Francisco Jerez <currojerez@riseup.net>
>---
> src/intel/intel_gpgpu.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/src/intel/intel_gpgpu.c b/src/intel/intel_gpgpu.c
>index 7f212e2..53a6dfc 100644
>--- a/src/intel/intel_gpgpu.c
>+++ b/src/intel/intel_gpgpu.c
>@@ -285,9 +285,9 @@ intel_gpgpu_get_cache_ctrl_gen8()
> static uint32_t
> intel_gpgpu_get_cache_ctrl_gen9()
> {
>-  //Pre-defined cache control registers 9:
>+  //Kernel-defined cache control registers 2:
>   //L3CC: WB; LeCC: WB; TC: LLC/eLLC;
>-  return (0x9 << 1);
>+  return (0x2 << 1);
> }
> 
> static void
>-- 
>2.5.1
>

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