From 93de2a6a4b91b72607136dd656edf03fb399d27f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 23 Sep 2026 09:37:21 -0700 Subject: KVM: SEV: Do cache maintenance on the source VM during intra-host migration Manually perform cache maintenance on the source VM during intra-host migration to ensure no stale data is left in CPU caches after the VM is destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's memory reclaim flows won't trigger cache maintenance, e.g. when all guest memory is reclaimed in response to detaching from the mmu_notifier. Note, relying on the destination VM to do cache maintenance isn't an option as KVM doesn't require identical guest memory configurations, i.e. the source VM may have access to memory that the destination VM does not. Enforcing equivalent memory configurations is infeasible, as it would require a *deep* comparison of memslots, e.g. to verify that not only are the memslot identical, but what the memslots point at is also identical. Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration") Cc: stable@vger.kernel.org Reported-by: Stefan Teodorescu Signed-off-by: Sean Christopherson Message-ID: <20260923163721.1584779-3-seanjc@google.com> Signed-off-by: Paolo Bonzini --- drivers/usb/chipidea/trace.h | 92 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 drivers/usb/chipidea/trace.h (limited to 'drivers/usb/chipidea/trace.h') diff --git a/drivers/usb/chipidea/trace.h b/drivers/usb/chipidea/trace.h new file mode 100644 index 000000000..1875419cd --- /dev/null +++ b/drivers/usb/chipidea/trace.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Trace support header file for device mode + * + * Copyright (C) 2020 NXP + * + * Author: Peter Chen + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM chipidea + +#if !defined(__LINUX_CHIPIDEA_TRACE) || defined(TRACE_HEADER_MULTI_READ) +#define __LINUX_CHIPIDEA_TRACE + +#include +#include +#include +#include "ci.h" +#include "udc.h" + +#define CHIPIDEA_MSG_MAX 500 + +void ci_log(struct ci_hdrc *ci, const char *fmt, ...); + +TRACE_EVENT(ci_log, + TP_PROTO(struct ci_hdrc *ci, struct va_format *vaf), + TP_ARGS(ci, vaf), + TP_STRUCT__entry( + __string(name, dev_name(ci->dev)) + __vstring(msg, vaf->fmt, vaf->va) + ), + TP_fast_assign( + __assign_str(name); + __assign_vstr(msg, vaf->fmt, vaf->va); + ), + TP_printk("%s: %s", __get_str(name), __get_str(msg)) +); + +DECLARE_EVENT_CLASS(ci_log_trb, + TP_PROTO(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq, struct td_node *td), + TP_ARGS(hwep, hwreq, td), + TP_STRUCT__entry( + __string(name, hwep->name) + __field(struct td_node *, td) + __field(struct usb_request *, req) + __field(dma_addr_t, dma) + __field(s32, td_remaining_size) + __field(u32, next) + __field(u32, token) + __field(u32, type) + ), + TP_fast_assign( + __assign_str(name); + __entry->req = &hwreq->req; + __entry->td = td; + __entry->dma = td->dma; + __entry->td_remaining_size = td->td_remaining_size; + __entry->next = le32_to_cpu(td->ptr->next); + __entry->token = le32_to_cpu(td->ptr->token); + __entry->type = usb_endpoint_type(hwep->ep.desc); + ), + TP_printk("%s: req: %p, td: %p, td_dma_address: %pad, remaining_size: %d, " + "next: %x, total bytes: %d, status: %lx", + __get_str(name), __entry->req, __entry->td, &__entry->dma, + __entry->td_remaining_size, __entry->next, + (int)((__entry->token & TD_TOTAL_BYTES) >> __ffs(TD_TOTAL_BYTES)), + __entry->token & TD_STATUS + ) +); + +DEFINE_EVENT(ci_log_trb, ci_prepare_td, + TP_PROTO(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq, struct td_node *td), + TP_ARGS(hwep, hwreq, td) +); + +DEFINE_EVENT(ci_log_trb, ci_complete_td, + TP_PROTO(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq, struct td_node *td), + TP_ARGS(hwep, hwreq, td) +); + +#endif /* __LINUX_CHIPIDEA_TRACE */ + +/* this part must be outside header guard */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . + +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace + +#include -- cgit v1.3.1