Volodymyr Babchuk eaff392c1e soc: qcom: cmd-db: Map shared memory as WC, not WB ... commit f9bb896eab upstream. Linux does not write into cmd-db region. This region of memory is write protected by XPU. XPU may sometime falsely detect clean cache eviction as "write" into the write protected region leading to secure interrupt which causes an endless loop somewhere in Trust Zone. The only reason it is working right now is because Qualcomm Hypervisor maps the same region as Non-Cacheable memory in Stage 2 translation tables. The issue manifests if we want to use another hypervisor (like Xen or KVM), which does not know anything about those specific mappings. Changing the mapping of cmd-db memory from MEMREMAP_WB to MEMREMAP_WT/WC removes dependency on correct mappings in Stage 2 tables. This patch fixes the issue by updating the mapping to MEMREMAP_WC. I tested this on SA8155P with Xen. Fixes: 312416d917 ("drivers: qcom: add command DB driver") Cc: stable@vger.kernel.org # 5.4+ Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com> Tested-by: Nikita Travkin <nikita@trvn.ru> # sc7180 WoA in EL2 Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com> Tested-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com> Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org> Link: https://lore.kernel.org/r/20240718-cmd_db_uncached-v2-1-f6cf53164c90@quicinc.com Signed-off-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-09-04 13:23:40 +02:00
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actions
amlogic	drivers: meson: secure-pwrc: always enable DMA domain	2023-07-23 13:47:09 +02:00
aspeed	soc: aspeed: socinfo: Add kfree for kstrdup	2023-08-26 14:23:36 +02:00
atmel
bcm
canaan
dove
fsl	soc: fsl: qbman: Use raw spinlock for cgr_lock	2024-04-10 16:18:42 +02:00
gemini
imx	soc: imx8m: Enable OCOTP clock for imx8mm before reading registers	2023-10-06 13:18:14 +02:00
ixp4xx
lantiq
litex
mediatek	soc: mediatek: cmdq: Fix typo of CMDQ_JUMP_RELATIVE	2024-06-16 13:39:17 +02:00
qcom	soc: qcom: cmd-db: Map shared memory as WC, not WB	2024-09-04 13:23:40 +02:00
renesas	pmdomain: renesas: r8a77980-sysc: CR7 must be always on	2024-03-01 13:21:48 +01:00
rockchip
samsung
sifive	soc: sifive: l2_cache: fix missing of_node_put() in sifive_l2_init()	2023-04-26 13:51:56 +02:00
sunxi
tegra
ti	soc: ti: wkup_m3_ipc: Send NULL dummy message instead of pointer message	2024-07-05 09:14:44 +02:00
ux500
versatile
xilinx	drivers: soc: xilinx: check return status of get_api_version()	2024-08-19 05:45:29 +02:00
Kconfig
Makefile