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| author | Fuad Tabba <fuad.tabba@linux.dev> | 2026-09-22 19:14:30 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2026-09-23 12:34:30 +0000 |
| commit | 2bc6b218717b9d08f466f88209251d54bc09b207 (patch) | |
| tree | cb91c941eccb15f94cbec4e96aa3a9c8736b5d66 /include/sound/graph_card.h | |
| download | linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.tar.gz linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.zip | |
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>
Diffstat (limited to 'include/sound/graph_card.h')
| -rw-r--r-- | include/sound/graph_card.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/sound/graph_card.h b/include/sound/graph_card.h new file mode 100644 index 000000000..8e2e15dfc --- /dev/null +++ b/include/sound/graph_card.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * ASoC audio graph card support + * + */ + +#ifndef __GRAPH_CARD_H +#define __GRAPH_CARD_H + +#include <sound/simple_card_utils.h> + +typedef int (*GRAPH2_CUSTOM)(struct simple_util_priv *priv, + struct device_node *lnk, + struct link_info *li); + +struct graph2_custom_hooks { + int (*hook_pre)(struct simple_util_priv *priv); + int (*hook_post)(struct simple_util_priv *priv); + GRAPH2_CUSTOM custom_normal; + GRAPH2_CUSTOM custom_dpcm; + GRAPH2_CUSTOM custom_c2c; +}; + +int audio_graph_parse_of(struct simple_util_priv *priv, struct device *dev); +int audio_graph2_parse_of(struct simple_util_priv *priv, struct device *dev, + struct graph2_custom_hooks *hooks); + +int audio_graph2_link_normal(struct simple_util_priv *priv, + struct device_node *lnk, struct link_info *li); +int audio_graph2_link_dpcm(struct simple_util_priv *priv, + struct device_node *lnk, struct link_info *li); +int audio_graph2_link_c2c(struct simple_util_priv *priv, + struct device_node *lnk, struct link_info *li); + +#endif /* __GRAPH_CARD_H */ |