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/cdns3/cdns3-debug.h | 157 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 drivers/usb/cdns3/cdns3-debug.h (limited to 'drivers/usb/cdns3/cdns3-debug.h') diff --git a/drivers/usb/cdns3/cdns3-debug.h b/drivers/usb/cdns3/cdns3-debug.h new file mode 100644 index 000000000..4618cfe85 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-debug.h @@ -0,0 +1,157 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Cadence USBSS DRD Driver. + * Debug header file. + * + * Copyright (C) 2018-2019 Cadence. + * + * Author: Pawel Laszczak + */ +#ifndef __LINUX_CDNS3_DEBUG +#define __LINUX_CDNS3_DEBUG + +#include "core.h" + +static inline char *cdns3_decode_usb_irq(char *str, + enum usb_device_speed speed, + u32 usb_ists) +{ + int ret; + + ret = sprintf(str, "IRQ %08x = ", usb_ists); + + if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) { + ret += sprintf(str + ret, "Connection %s\n", + usb_speed_string(speed)); + } + if (usb_ists & USB_ISTS_DIS2I || usb_ists & USB_ISTS_DISI) + ret += sprintf(str + ret, "Disconnection "); + if (usb_ists & USB_ISTS_L2ENTI) + ret += sprintf(str + ret, "suspended "); + if (usb_ists & USB_ISTS_L1ENTI) + ret += sprintf(str + ret, "L1 enter "); + if (usb_ists & USB_ISTS_L1EXTI) + ret += sprintf(str + ret, "L1 exit "); + if (usb_ists & USB_ISTS_L2ENTI) + ret += sprintf(str + ret, "L2 enter "); + if (usb_ists & USB_ISTS_L2EXTI) + ret += sprintf(str + ret, "L2 exit "); + if (usb_ists & USB_ISTS_U3EXTI) + ret += sprintf(str + ret, "U3 exit "); + if (usb_ists & USB_ISTS_UWRESI) + ret += sprintf(str + ret, "Warm Reset "); + if (usb_ists & USB_ISTS_UHRESI) + ret += sprintf(str + ret, "Hot Reset "); + if (usb_ists & USB_ISTS_U2RESI) + ret += sprintf(str + ret, "Reset"); + + return str; +} + +static inline char *cdns3_decode_ep_irq(char *str, + u32 ep_sts, + const char *ep_name) +{ + int ret; + + ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts); + + if (ep_sts & EP_STS_SETUP) + ret += sprintf(str + ret, "SETUP "); + if (ep_sts & EP_STS_IOC) + ret += sprintf(str + ret, "IOC "); + if (ep_sts & EP_STS_ISP) + ret += sprintf(str + ret, "ISP "); + if (ep_sts & EP_STS_DESCMIS) + ret += sprintf(str + ret, "DESCMIS "); + if (ep_sts & EP_STS_STREAMR) + ret += sprintf(str + ret, "STREAMR "); + if (ep_sts & EP_STS_MD_EXIT) + ret += sprintf(str + ret, "MD_EXIT "); + if (ep_sts & EP_STS_TRBERR) + ret += sprintf(str + ret, "TRBERR "); + if (ep_sts & EP_STS_NRDY) + ret += sprintf(str + ret, "NRDY "); + if (ep_sts & EP_STS_PRIME) + ret += sprintf(str + ret, "PRIME "); + if (ep_sts & EP_STS_SIDERR) + ret += sprintf(str + ret, "SIDERRT "); + if (ep_sts & EP_STS_OUTSMM) + ret += sprintf(str + ret, "OUTSMM "); + if (ep_sts & EP_STS_ISOERR) + ret += sprintf(str + ret, "ISOERR "); + if (ep_sts & EP_STS_IOT) + ret += sprintf(str + ret, "IOT "); + + return str; +} + +static inline char *cdns3_decode_epx_irq(char *str, + char *ep_name, + u32 ep_sts) +{ + return cdns3_decode_ep_irq(str, ep_sts, ep_name); +} + +static inline char *cdns3_decode_ep0_irq(char *str, + int dir, + u32 ep_sts) +{ + return cdns3_decode_ep_irq(str, ep_sts, + dir ? "ep0IN" : "ep0OUT"); +} + +/** + * Debug a transfer ring. + * + * Prints out all TRBs in the endpoint ring, even those after the Link TRB. + *. + */ +static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep, char *str) +{ + dma_addr_t addr = priv_ep->trb_pool_dma; + struct cdns3_trb *trb; + int trb_per_sector; + int ret = 0; + int i; + + trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type); + + trb = &priv_ep->trb_pool[priv_ep->dequeue]; + ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name); + + ret += sprintf(str + ret, + "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n", + priv_ep->dequeue, trb, + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); + + trb = &priv_ep->trb_pool[priv_ep->enqueue]; + ret += sprintf(str + ret, + "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n", + priv_ep->enqueue, trb, + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); + + ret += sprintf(str + ret, + "\t\tfree trbs: %d, CCS=%d, PCS=%d\n", + priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs); + + if (trb_per_sector > TRBS_PER_SEGMENT) { + sprintf(str + ret, "\t\tTransfer ring %d too big\n", + trb_per_sector); + return str; + } + + for (i = 0; i < trb_per_sector; ++i) { + trb = &priv_ep->trb_pool[i]; + ret += sprintf(str + ret, + "\t\t@%pad %08x %08x %08x\n", &addr, + le32_to_cpu(trb->buffer), + le32_to_cpu(trb->length), + le32_to_cpu(trb->control)); + addr += sizeof(*trb); + } + + return str; +} + +#endif /*__LINUX_CDNS3_DEBUG*/ -- cgit v1.3.1