arm64/boot: Disable trapping of PMZR_EL0 writes to EL2grafted

__init_el2_fgt2() writes one mask to both HDFGRTR2_EL2 and HDFGWTR2_EL2.
PMZR_EL0 is write-only, so its trap bit, nPMZR_EL0, exists only in
HDFGWTR2_EL2 and is therefore never set: a PMZR_EL0 write from the host
traps to EL2, where the nVHE hypervisor has no handler and BUG()s. The
kernel never writes PMZR_EL0, but kernel.perf_user_access=1 has the PMU
driver set PMUSERENR_EL0.UEN for a task with a user-read event, so a
write from EL0 reaches the trap and takes the host down without a panic
message.

Accumulate the HDFGWTR2_EL2 bits separately, as __init_el2_fgt() already
does for HDFGWTR_EL2, and set nPMZR_EL0 with the other FEAT_PMUv3p9
bits.

Fixes: 858c7bfcb35e1 ("arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9")
Cc: stable@vger.kernel.org
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oliver Upton <oupton@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/include/sound/sof/info.h b/include/sound/sof/info.h
new file mode 100644
index 000000000..08400fbe5
--- /dev/null
+++ b/include/sound/sof/info.h
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#ifndef __INCLUDE_SOUND_SOF_INFO_H__
+#define __INCLUDE_SOUND_SOF_INFO_H__
+
+#include <sound/sof/header.h>
+#include <sound/sof/stream.h>
+
+/*
+ * Firmware boot and version
+ */
+
+#define SOF_IPC_MAX_ELEMS	16
+
+/*
+ * Firmware boot info flag bits (64-bit)
+ */
+#define SOF_IPC_INFO_BUILD		BIT(0)
+#define SOF_IPC_INFO_LOCKS		BIT(1)
+#define SOF_IPC_INFO_LOCKSV		BIT(2)
+#define SOF_IPC_INFO_GDB		BIT(3)
+#define SOF_IPC_INFO_D3_PERSISTENT	BIT(4)
+
+/* extended data types that can be appended onto end of sof_ipc_fw_ready */
+enum sof_ipc_ext_data {
+	SOF_IPC_EXT_UNUSED		= 0,
+	SOF_IPC_EXT_WINDOW		= 1,
+	SOF_IPC_EXT_CC_INFO		= 2,
+	SOF_IPC_EXT_PROBE_INFO		= 3,
+	SOF_IPC_EXT_USER_ABI_INFO	= 4,
+};
+
+/* Build u32 number in format MMmmmppp */
+#define SOF_FW_VER(MAJOR, MINOR, PATCH) ((uint32_t)( \
+	((MAJOR) << 24) | ((MINOR) << 12) | (PATCH)))
+
+/* FW version - SOF_IPC_GLB_VERSION */
+struct sof_ipc_fw_version {
+	struct sof_ipc_hdr hdr;
+	uint16_t major;
+	uint16_t minor;
+	uint16_t micro;
+	uint16_t build;
+	uint8_t date[12];
+	uint8_t time[10];
+	uint8_t tag[6];
+	uint32_t abi_version;
+	/* used to check FW and ldc file compatibility, reproducible value */
+	uint32_t src_hash;
+
+	/* reserved for future use */
+	uint32_t reserved[3];
+} __packed;
+
+/* FW ready Message - sent by firmware when boot has completed */
+struct sof_ipc_fw_ready {
+	struct sof_ipc_cmd_hdr hdr;
+	uint32_t dspbox_offset;	 /* dsp initiated IPC mailbox */
+	uint32_t hostbox_offset; /* host initiated IPC mailbox */
+	uint32_t dspbox_size;
+	uint32_t hostbox_size;
+	struct sof_ipc_fw_version version;
+
+	/* Miscellaneous flags */
+	uint64_t flags;
+
+	/* reserved for future use */
+	uint32_t reserved[4];
+} __packed;
+
+/*
+ * Extended Firmware data. All optional, depends on platform/arch.
+ */
+enum sof_ipc_region {
+	SOF_IPC_REGION_DOWNBOX	= 0,
+	SOF_IPC_REGION_UPBOX,
+	SOF_IPC_REGION_TRACE,
+	SOF_IPC_REGION_DEBUG,
+	SOF_IPC_REGION_STREAM,
+	SOF_IPC_REGION_REGS,
+	SOF_IPC_REGION_EXCEPTION,
+};
+
+struct sof_ipc_ext_data_hdr {
+	struct sof_ipc_cmd_hdr hdr;
+	uint32_t type;		/**< SOF_IPC_EXT_ */
+} __packed;
+
+struct sof_ipc_window_elem {
+	struct sof_ipc_hdr hdr;
+	uint32_t type;		/**< SOF_IPC_REGION_ */
+	uint32_t id;		/**< platform specific - used to map to host memory */
+	uint32_t flags;		/**< R, W, RW, etc - to define */
+	uint32_t size;		/**< size of region in bytes */
+	/* offset in window region as windows can be partitioned */
+	uint32_t offset;
+} __packed;
+
+/* extended data memory windows for IPC, trace and debug */
+struct sof_ipc_window {
+	struct sof_ipc_ext_data_hdr ext_hdr;
+	uint32_t num_windows;
+	struct sof_ipc_window_elem window[SOF_IPC_MAX_ELEMS];
+}  __packed;
+
+struct sof_ipc_cc_version {
+	struct sof_ipc_ext_data_hdr ext_hdr;
+	uint32_t major;
+	uint32_t minor;
+	uint32_t micro;
+
+	/* reserved for future use */
+	uint32_t reserved[4];
+
+	uint8_t name[16]; /* null terminated compiler name */
+	uint8_t optim[4]; /* null terminated compiler -O flag value */
+	uint8_t desc[32]; /* null terminated compiler description */
+} __packed;
+
+/* extended data: Probe setup */
+struct sof_ipc_probe_support {
+	struct sof_ipc_ext_data_hdr ext_hdr;
+
+	uint32_t probe_points_max;
+	uint32_t injection_dmas_max;
+
+	/* reserved for future use */
+	uint32_t reserved[2];
+} __packed;
+
+/* extended data: user abi version(s) */
+struct sof_ipc_user_abi_version {
+	struct sof_ipc_ext_data_hdr ext_hdr;
+
+	uint32_t abi_dbg_version;
+}  __packed;
+
+#endif