From 2bc6b218717b9d08f466f88209251d54bc09b207 Mon Sep 17 00:00:00 2001 From: Fuad Tabba Date: Tue, 22 Sep 2026 19:14:30 +0100 Subject: arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 __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 Reviewed-by: Anshuman Khandual Reviewed-by: Oliver Upton Signed-off-by: Will Deacon --- include/net/llc_if.h | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/net/llc_if.h (limited to 'include/net/llc_if.h') diff --git a/include/net/llc_if.h b/include/net/llc_if.h new file mode 100644 index 000000000..a33325961 --- /dev/null +++ b/include/net/llc_if.h @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef LLC_IF_H +#define LLC_IF_H +/* + * Copyright (c) 1997 by Procom Technology,Inc. + * 2001 by Arnaldo Carvalho de Melo + */ +/* Defines LLC interface to network layer */ +/* Available primitives */ +#include +#include +#include +#include +#include + +#define LLC_DATAUNIT_PRIM 1 +#define LLC_CONN_PRIM 2 +#define LLC_DATA_PRIM 3 +#define LLC_DISC_PRIM 4 +#define LLC_RESET_PRIM 5 +#define LLC_FLOWCONTROL_PRIM 6 /* Not supported at this time */ +#define LLC_DISABLE_PRIM 7 +#define LLC_XID_PRIM 8 +#define LLC_TEST_PRIM 9 +#define LLC_SAP_ACTIVATION 10 +#define LLC_SAP_DEACTIVATION 11 + +#define LLC_NBR_PRIMITIVES 11 + +#define LLC_IND 1 +#define LLC_CONFIRM 2 + +/* Primitive type */ +#define LLC_PRIM_TYPE_REQ 1 +#define LLC_PRIM_TYPE_IND 2 +#define LLC_PRIM_TYPE_RESP 3 +#define LLC_PRIM_TYPE_CONFIRM 4 + +/* Reset reasons, remote entity or local LLC */ +#define LLC_RESET_REASON_REMOTE 1 +#define LLC_RESET_REASON_LOCAL 2 + +/* Disconnect reasons */ +#define LLC_DISC_REASON_RX_DM_RSP_PDU 0 +#define LLC_DISC_REASON_RX_DISC_CMD_PDU 1 +#define LLC_DISC_REASON_ACK_TMR_EXP 2 + +/* Confirm reasons */ +#define LLC_STATUS_CONN 0 /* connect confirm & reset confirm */ +#define LLC_STATUS_DISC 1 /* connect confirm & reset confirm */ +#define LLC_STATUS_FAILED 2 /* connect confirm & reset confirm */ +#define LLC_STATUS_IMPOSSIBLE 3 /* connect confirm */ +#define LLC_STATUS_RECEIVED 4 /* data conn */ +#define LLC_STATUS_REMOTE_BUSY 5 /* data conn */ +#define LLC_STATUS_REFUSE 6 /* data conn */ +#define LLC_STATUS_CONFLICT 7 /* disconnect conn */ +#define LLC_STATUS_RESET_DONE 8 /* */ + +int llc_establish_connection(struct sock *sk, const u8 *lmac, u8 *dmac, + u8 dsap); +int llc_build_and_send_pkt(struct sock *sk, struct sk_buff *skb); +int llc_send_disc(struct sock *sk); +#endif /* LLC_IF_H */ -- cgit v1.3.1