[PATCH 3/3] [v2] hvc_dcc: disable user-space access to DCC
From: catalin.marinas@arm.com (Catalin Marinas)
Date: 2015-08-20 13:02:00
On Thu, Aug 20, 2015 at 11:46:45AM +0100, Will Deacon wrote:
quoted hunk ↗ jump to hunk
On Thu, Aug 20, 2015 at 12:02:50AM +0100, Timur Tabi wrote:quoted
If the DCC driver loads, then disable user-space access to the DCC so that we don't have two entities trying to access the DCC at the same time.In the interests of making some headway with this, just drop this patch and I'll queue the diff below via the arm64 tree. Will --->8diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 39139a3aa16d..4c922ecce600 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S@@ -156,7 +156,7 @@ ENTRY(__cpu_setup) mov x0, #3 << 20 msr cpacr_el1, x0 // Enable FP/ASIMD - msr mdscr_el1, xzr // Reset mdscr_el1 + msr mdscr_el1, #1 << 12 // Reset mdscr_el1
Nitpick: expand the "Reset..." comment to include some text about this bit. -- Catalin