From 50e1b8fe79895c7f9971e432c6d29bc04c1b41b6 Mon Sep 17 00:00:00 2001
From: Jolly Shah <jollys@xilinx.com>
Date: Fri, 4 Jan 2019 12:03:44 -0800
Subject: [PATCH] zynqmp: pm: Invalidate several clocks that Linux doesn't need
to control
Linux has no reason to use these system and debug clocks and therefore
shouldn't access them. These clocks are marked as invalid in order to
prevent Linux from registering and querying them.
Note that despite clocks being marked as invalid a security issue
still remains in place as there is nothing that prevents the
non-secure world from gating these clocks and that way causing
damage to the system.
Signed-off-by: Mirela Simonovic <mirela.simonovic@aggios.com>
Acked-by: Will Wong <WILLW@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
---
plat/xilinx/zynqmp/pm_service/pm_api_clock.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_clock.c b/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
index 8901ea691..c49969f24 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_clock.c
@@ -2256,6 +2256,24 @@ static struct pm_ext_clock ext_clocks[] = {
static uint32_t pm_clk_invalid_list[] = {CLK_USB0, CLK_USB1, CLK_CSU_SPB,
CLK_ACPU_FULL,
CLK_ACPU_HALF,
+ CLK_DBG_FPD,
+ CLK_DBG_LPD,
+ CLK_DBG_TRACE,
+ CLK_DBG_TSTMP,
+ CLK_DDR_REF,
+ CLK_TOPSW_MAIN,
+ CLK_TOPSW_LSBUS,
+ CLK_GTGREF0_REF,
+ CLK_LPD_SWITCH,
+ CLK_LPD_LSBUS,
+ CLK_CPU_R5,
+ CLK_CPU_R5_CORE,
+ CLK_CSU_SPB,
+ CLK_CSU_PLL,
+ CLK_PCAP,
+ CLK_IOU_SWITCH,
+ CLK_DLL_REF,
+ CLK_TIMESTAMP_REF,
};
/**
--
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