lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 09 Mar 2012 11:02:54 -0800 From: Greg KH <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Eugeni Dodonov <eugeni.dodonov@...el.com>, Kenneth Graunke <kenneth@...tecape.org>, Jesse Barnes <jbarnes@...tuousgeek.org> Subject: [ 52/95] drm/i915: gen7: implement rczunit workaround 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eugeni Dodonov <eugeni.dodonov@...el.com> commit eae66b50c760233fad526edf4a0d327be17a055d upstream. This is yet another workaround related to clock gating which we need on Ivy Bridge. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41353 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44610 Tested-by: Eugeni Dodonov <eugeni.dodonov@...el.com> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@...el.com> Signed-off-by: Kenneth Graunke <kenneth@...tecape.org> Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_display.c | 5 +++++ 2 files changed, 6 insertions(+) --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3476,6 +3476,7 @@ #define GT_FIFO_NUM_RESERVED_ENTRIES 20 #define GEN6_UCGCTL2 0x9404 +# define GEN6_RCZUNIT_CLOCK_GATE_DISABLE (1 << 13) # define GEN6_RCPBUNIT_CLOCK_GATE_DISABLE (1 << 12) # define GEN6_RCCUNIT_CLOCK_GATE_DISABLE (1 << 11) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8248,6 +8248,11 @@ static void ivybridge_init_clock_gating( I915_WRITE(WM2_LP_ILK, 0); I915_WRITE(WM1_LP_ILK, 0); + /* According to the spec, bit 13 (RCZUNIT) must be set on IVB. + * This implements the WaDisableRCZUnitClockGating workaround. + */ + I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); + I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); for_each_pipe(pipe) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists