mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-11 21:26:44 +07:00
221bb8a46e
VGIC implementation. - s390: support for trapping software breakpoints, nested virtualization (vSIE), the STHYI opcode, initial extensions for CPU model support. - MIPS: support for MIPS64 hosts (32-bit guests only) and lots of cleanups, preliminary to this and the upcoming support for hardware virtualization extensions. - x86: support for execute-only mappings in nested EPT; reduced vmexit latency for TSC deadline timer (by about 30%) on Intel hosts; support for more than 255 vCPUs. - PPC: bugfixes. The ugly bit is the conflicts. A couple of them are simple conflicts due to 4.7 fixes, but most of them are with other trees. There was definitely too much reliance on Acked-by here. Some conflicts are for KVM patches where _I_ gave my Acked-by, but the worst are for this pull request's patches that touch files outside arch/*/kvm. KVM submaintainers should probably learn to synchronize better with arch maintainers, with the latter providing topic branches whenever possible instead of Acked-by. This is what we do with arch/x86. And I should learn to refuse pull requests when linux-next sends scary signals, even if that means that submaintainers have to rebase their branches. Anyhow, here's the list: - arch/x86/kvm/vmx.c: handle_pcommit and EXIT_REASON_PCOMMIT was removed by the nvdimm tree. This tree adds handle_preemption_timer and EXIT_REASON_PREEMPTION_TIMER at the same place. In general all mentions of pcommit have to go. There is also a conflict between a stable fix and this patch, where the stable fix removed the vmx_create_pml_buffer function and its call. - virt/kvm/kvm_main.c: kvm_cpu_notifier was removed by the hotplug tree. This tree adds kvm_io_bus_get_dev at the same place. - virt/kvm/arm/vgic.c: a few final bugfixes went into 4.7 before the file was completely removed for 4.8. - include/linux/irqchip/arm-gic-v3.h: this one is entirely our fault; this is a change that should have gone in through the irqchip tree and pulled by kvm-arm. I think I would have rejected this kvm-arm pull request. The KVM version is the right one, except that it lacks GITS_BASER_PAGES_SHIFT. - arch/powerpc: what a mess. For the idle_book3s.S conflict, the KVM tree is the right one; everything else is trivial. In this case I am not quite sure what went wrong. The commit that is causing the mess (fd7bacbca4
, "KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt", 2016-05-15) touches both arch/powerpc/kernel/ and arch/powerpc/kvm/. It's large, but at 396 insertions/5 deletions I guessed that it wasn't really possible to split it and that the 5 deletions wouldn't conflict. That wasn't the case. - arch/s390: also messy. First is hypfs_diag.c where the KVM tree moved some code and the s390 tree patched it. You have to reapply the relevant part of commits6c22c98637
, plus all ofe030c1125e
, to arch/s390/kernel/diag.c. Or pick the linux-next conflict resolution from http://marc.info/?l=kvm&m=146717549531603&w=2. Second, there is a conflict in gmap.c between a stable fix and 4.8. The KVM version here is the correct one. I have pushed my resolution at refs/heads/merge-20160802 (commit 3d1f53419842) at git://git.kernel.org/pub/scm/virt/kvm/kvm.git. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAABAgAGBQJXoGm7AAoJEL/70l94x66DugQIAIj703ePAFepB/fCrKHkZZia SGrsBdvAtNsOhr7FQ5qvvjLxiv/cv7CymeuJivX8H+4kuUHUllDzey+RPHYHD9X7 U6n1PdCH9F15a3IXc8tDjlDdOMNIKJixYuq1UyNZMU6NFwl00+TZf9JF8A2US65b x/41W98ilL6nNBAsoDVmCLtPNWAqQ3lajaZELGfcqRQ9ZGKcAYOaLFXHv2YHf2XC qIDMf+slBGSQ66UoATnYV2gAopNlWbZ7n0vO6tE2KyvhHZ1m399aBX1+k8la/0JI 69r+Tz7ZHUSFtmlmyByi5IAB87myy2WQHyAPwj+4vwJkDGPcl0TrupzbG7+T05Y= =42ti -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull KVM updates from Paolo Bonzini: - ARM: GICv3 ITS emulation and various fixes. Removal of the old VGIC implementation. - s390: support for trapping software breakpoints, nested virtualization (vSIE), the STHYI opcode, initial extensions for CPU model support. - MIPS: support for MIPS64 hosts (32-bit guests only) and lots of cleanups, preliminary to this and the upcoming support for hardware virtualization extensions. - x86: support for execute-only mappings in nested EPT; reduced vmexit latency for TSC deadline timer (by about 30%) on Intel hosts; support for more than 255 vCPUs. - PPC: bugfixes. * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (302 commits) KVM: PPC: Introduce KVM_CAP_PPC_HTM MIPS: Select HAVE_KVM for MIPS64_R{2,6} MIPS: KVM: Reset CP0_PageMask during host TLB flush MIPS: KVM: Fix ptr->int cast via KVM_GUEST_KSEGX() MIPS: KVM: Sign extend MFC0/RDHWR results MIPS: KVM: Fix 64-bit big endian dynamic translation MIPS: KVM: Fail if ebase doesn't fit in CP0_EBase MIPS: KVM: Use 64-bit CP0_EBase when appropriate MIPS: KVM: Set CP0_Status.KX on MIPS64 MIPS: KVM: Make entry code MIPS64 friendly MIPS: KVM: Use kmap instead of CKSEG0ADDR() MIPS: KVM: Use virt_to_phys() to get commpage PFN MIPS: Fix definition of KSEGX() for 64-bit KVM: VMX: Add VMCS to CPU's loaded VMCSs before VMPTRLD kvm: x86: nVMX: maintain internal copy of current VMCS KVM: PPC: Book3S HV: Save/restore TM state in H_CEDE KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures KVM: arm64: vgic-its: Simplify MAPI error handling KVM: arm64: vgic-its: Make vgic_its_cmd_handle_mapi similar to other handlers KVM: arm64: vgic-its: Turn device_id validation into generic ID validation ...
357 lines
8.2 KiB
C
357 lines
8.2 KiB
C
/*
|
|
* Copyright (c) 2006, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* Copyright (C) 2006-2008 Intel Corporation
|
|
* Copyright IBM Corporation, 2008
|
|
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
|
|
*
|
|
* Author: Allen M. Kay <allen.m.kay@intel.com>
|
|
* Author: Weidong Han <weidong.han@intel.com>
|
|
* Author: Ben-Ami Yassour <benami@il.ibm.com>
|
|
*/
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/kvm_host.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/iommu.h>
|
|
#include "assigned-dev.h"
|
|
|
|
static bool allow_unsafe_assigned_interrupts;
|
|
module_param_named(allow_unsafe_assigned_interrupts,
|
|
allow_unsafe_assigned_interrupts, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(allow_unsafe_assigned_interrupts,
|
|
"Enable device assignment on platforms without interrupt remapping support.");
|
|
|
|
static int kvm_iommu_unmap_memslots(struct kvm *kvm);
|
|
static void kvm_iommu_put_pages(struct kvm *kvm,
|
|
gfn_t base_gfn, unsigned long npages);
|
|
|
|
static kvm_pfn_t kvm_pin_pages(struct kvm_memory_slot *slot, gfn_t gfn,
|
|
unsigned long npages)
|
|
{
|
|
gfn_t end_gfn;
|
|
kvm_pfn_t pfn;
|
|
|
|
pfn = gfn_to_pfn_memslot(slot, gfn);
|
|
end_gfn = gfn + npages;
|
|
gfn += 1;
|
|
|
|
if (is_error_noslot_pfn(pfn))
|
|
return pfn;
|
|
|
|
while (gfn < end_gfn)
|
|
gfn_to_pfn_memslot(slot, gfn++);
|
|
|
|
return pfn;
|
|
}
|
|
|
|
static void kvm_unpin_pages(struct kvm *kvm, kvm_pfn_t pfn,
|
|
unsigned long npages)
|
|
{
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < npages; ++i)
|
|
kvm_release_pfn_clean(pfn + i);
|
|
}
|
|
|
|
int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
|
|
{
|
|
gfn_t gfn, end_gfn;
|
|
kvm_pfn_t pfn;
|
|
int r = 0;
|
|
struct iommu_domain *domain = kvm->arch.iommu_domain;
|
|
int flags;
|
|
|
|
/* check if iommu exists and in use */
|
|
if (!domain)
|
|
return 0;
|
|
|
|
gfn = slot->base_gfn;
|
|
end_gfn = gfn + slot->npages;
|
|
|
|
flags = IOMMU_READ;
|
|
if (!(slot->flags & KVM_MEM_READONLY))
|
|
flags |= IOMMU_WRITE;
|
|
if (!kvm->arch.iommu_noncoherent)
|
|
flags |= IOMMU_CACHE;
|
|
|
|
|
|
while (gfn < end_gfn) {
|
|
unsigned long page_size;
|
|
|
|
/* Check if already mapped */
|
|
if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) {
|
|
gfn += 1;
|
|
continue;
|
|
}
|
|
|
|
/* Get the page size we could use to map */
|
|
page_size = kvm_host_page_size(kvm, gfn);
|
|
|
|
/* Make sure the page_size does not exceed the memslot */
|
|
while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn)
|
|
page_size >>= 1;
|
|
|
|
/* Make sure gfn is aligned to the page size we want to map */
|
|
while ((gfn << PAGE_SHIFT) & (page_size - 1))
|
|
page_size >>= 1;
|
|
|
|
/* Make sure hva is aligned to the page size we want to map */
|
|
while (__gfn_to_hva_memslot(slot, gfn) & (page_size - 1))
|
|
page_size >>= 1;
|
|
|
|
/*
|
|
* Pin all pages we are about to map in memory. This is
|
|
* important because we unmap and unpin in 4kb steps later.
|
|
*/
|
|
pfn = kvm_pin_pages(slot, gfn, page_size >> PAGE_SHIFT);
|
|
if (is_error_noslot_pfn(pfn)) {
|
|
gfn += 1;
|
|
continue;
|
|
}
|
|
|
|
/* Map into IO address space */
|
|
r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
|
|
page_size, flags);
|
|
if (r) {
|
|
printk(KERN_ERR "kvm_iommu_map_address:"
|
|
"iommu failed to map pfn=%llx\n", pfn);
|
|
kvm_unpin_pages(kvm, pfn, page_size >> PAGE_SHIFT);
|
|
goto unmap_pages;
|
|
}
|
|
|
|
gfn += page_size >> PAGE_SHIFT;
|
|
|
|
cond_resched();
|
|
}
|
|
|
|
return 0;
|
|
|
|
unmap_pages:
|
|
kvm_iommu_put_pages(kvm, slot->base_gfn, gfn - slot->base_gfn);
|
|
return r;
|
|
}
|
|
|
|
static int kvm_iommu_map_memslots(struct kvm *kvm)
|
|
{
|
|
int idx, r = 0;
|
|
struct kvm_memslots *slots;
|
|
struct kvm_memory_slot *memslot;
|
|
|
|
if (kvm->arch.iommu_noncoherent)
|
|
kvm_arch_register_noncoherent_dma(kvm);
|
|
|
|
idx = srcu_read_lock(&kvm->srcu);
|
|
slots = kvm_memslots(kvm);
|
|
|
|
kvm_for_each_memslot(memslot, slots) {
|
|
r = kvm_iommu_map_pages(kvm, memslot);
|
|
if (r)
|
|
break;
|
|
}
|
|
srcu_read_unlock(&kvm->srcu, idx);
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_assign_device(struct kvm *kvm, struct pci_dev *pdev)
|
|
{
|
|
struct iommu_domain *domain = kvm->arch.iommu_domain;
|
|
int r;
|
|
bool noncoherent;
|
|
|
|
/* check if iommu exists and in use */
|
|
if (!domain)
|
|
return 0;
|
|
|
|
if (pdev == NULL)
|
|
return -ENODEV;
|
|
|
|
r = iommu_attach_device(domain, &pdev->dev);
|
|
if (r) {
|
|
dev_err(&pdev->dev, "kvm assign device failed ret %d", r);
|
|
return r;
|
|
}
|
|
|
|
noncoherent = !iommu_capable(&pci_bus_type, IOMMU_CAP_CACHE_COHERENCY);
|
|
|
|
/* Check if need to update IOMMU page table for guest memory */
|
|
if (noncoherent != kvm->arch.iommu_noncoherent) {
|
|
kvm_iommu_unmap_memslots(kvm);
|
|
kvm->arch.iommu_noncoherent = noncoherent;
|
|
r = kvm_iommu_map_memslots(kvm);
|
|
if (r)
|
|
goto out_unmap;
|
|
}
|
|
|
|
kvm_arch_start_assignment(kvm);
|
|
pci_set_dev_assigned(pdev);
|
|
|
|
dev_info(&pdev->dev, "kvm assign device\n");
|
|
|
|
return 0;
|
|
out_unmap:
|
|
kvm_iommu_unmap_memslots(kvm);
|
|
return r;
|
|
}
|
|
|
|
int kvm_deassign_device(struct kvm *kvm, struct pci_dev *pdev)
|
|
{
|
|
struct iommu_domain *domain = kvm->arch.iommu_domain;
|
|
|
|
/* check if iommu exists and in use */
|
|
if (!domain)
|
|
return 0;
|
|
|
|
if (pdev == NULL)
|
|
return -ENODEV;
|
|
|
|
iommu_detach_device(domain, &pdev->dev);
|
|
|
|
pci_clear_dev_assigned(pdev);
|
|
kvm_arch_end_assignment(kvm);
|
|
|
|
dev_info(&pdev->dev, "kvm deassign device\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_iommu_map_guest(struct kvm *kvm)
|
|
{
|
|
int r;
|
|
|
|
if (!iommu_present(&pci_bus_type)) {
|
|
printk(KERN_ERR "%s: iommu not found\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
mutex_lock(&kvm->slots_lock);
|
|
|
|
kvm->arch.iommu_domain = iommu_domain_alloc(&pci_bus_type);
|
|
if (!kvm->arch.iommu_domain) {
|
|
r = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (!allow_unsafe_assigned_interrupts &&
|
|
!iommu_capable(&pci_bus_type, IOMMU_CAP_INTR_REMAP)) {
|
|
printk(KERN_WARNING "%s: No interrupt remapping support,"
|
|
" disallowing device assignment."
|
|
" Re-enable with \"allow_unsafe_assigned_interrupts=1\""
|
|
" module option.\n", __func__);
|
|
iommu_domain_free(kvm->arch.iommu_domain);
|
|
kvm->arch.iommu_domain = NULL;
|
|
r = -EPERM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
r = kvm_iommu_map_memslots(kvm);
|
|
if (r)
|
|
kvm_iommu_unmap_memslots(kvm);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&kvm->slots_lock);
|
|
return r;
|
|
}
|
|
|
|
static void kvm_iommu_put_pages(struct kvm *kvm,
|
|
gfn_t base_gfn, unsigned long npages)
|
|
{
|
|
struct iommu_domain *domain;
|
|
gfn_t end_gfn, gfn;
|
|
kvm_pfn_t pfn;
|
|
u64 phys;
|
|
|
|
domain = kvm->arch.iommu_domain;
|
|
end_gfn = base_gfn + npages;
|
|
gfn = base_gfn;
|
|
|
|
/* check if iommu exists and in use */
|
|
if (!domain)
|
|
return;
|
|
|
|
while (gfn < end_gfn) {
|
|
unsigned long unmap_pages;
|
|
size_t size;
|
|
|
|
/* Get physical address */
|
|
phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
|
|
|
|
if (!phys) {
|
|
gfn++;
|
|
continue;
|
|
}
|
|
|
|
pfn = phys >> PAGE_SHIFT;
|
|
|
|
/* Unmap address from IO address space */
|
|
size = iommu_unmap(domain, gfn_to_gpa(gfn), PAGE_SIZE);
|
|
unmap_pages = 1ULL << get_order(size);
|
|
|
|
/* Unpin all pages we just unmapped to not leak any memory */
|
|
kvm_unpin_pages(kvm, pfn, unmap_pages);
|
|
|
|
gfn += unmap_pages;
|
|
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
|
|
{
|
|
kvm_iommu_put_pages(kvm, slot->base_gfn, slot->npages);
|
|
}
|
|
|
|
static int kvm_iommu_unmap_memslots(struct kvm *kvm)
|
|
{
|
|
int idx;
|
|
struct kvm_memslots *slots;
|
|
struct kvm_memory_slot *memslot;
|
|
|
|
idx = srcu_read_lock(&kvm->srcu);
|
|
slots = kvm_memslots(kvm);
|
|
|
|
kvm_for_each_memslot(memslot, slots)
|
|
kvm_iommu_unmap_pages(kvm, memslot);
|
|
|
|
srcu_read_unlock(&kvm->srcu, idx);
|
|
|
|
if (kvm->arch.iommu_noncoherent)
|
|
kvm_arch_unregister_noncoherent_dma(kvm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_iommu_unmap_guest(struct kvm *kvm)
|
|
{
|
|
struct iommu_domain *domain = kvm->arch.iommu_domain;
|
|
|
|
/* check if iommu exists and in use */
|
|
if (!domain)
|
|
return 0;
|
|
|
|
mutex_lock(&kvm->slots_lock);
|
|
kvm_iommu_unmap_memslots(kvm);
|
|
kvm->arch.iommu_domain = NULL;
|
|
kvm->arch.iommu_noncoherent = false;
|
|
mutex_unlock(&kvm->slots_lock);
|
|
|
|
iommu_domain_free(domain);
|
|
return 0;
|
|
}
|