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KVM PPC update for 5.7

Browse Source 
* Add a capability for enabling secure guests under the Protected
   Execution Framework ultravisor
 
 * Various bug fixes and cleanups.
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Merge tag 'kvm-ppc-next-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

KVM PPC update for 5.7

* Add a capability for enabling secure guests under the Protected
  Execution Framework ultravisor

* Various bug fixes and cleanups.
This commit is contained in:
Paolo Bonzini 2020-03-31 10:45:49 -04:00
commit 4f4af841f0
25 changed files with 205 additions and 122 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Documentation/virt/kvm/api.rst
View File

@ -5785,6 +5785,23 @@ it hard or impossible to use it correctly. The availability of
KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 signals that those bugs are fixed.
Userspace should not try to use KVM_CAP_MANUAL_DIRTY_LOG_PROTECT.
7.19 KVM_CAP_PPC_SECURE_GUEST
------------------------------
:Architectures: ppc
This capability indicates that KVM is running on a host that has
ultravisor firmware and thus can support a secure guest. On such a
system, a guest can ask the ultravisor to make it a secure guest,
one whose memory is inaccessible to the host except for pages which
are explicitly requested to be shared with the host. The ultravisor
notifies KVM when a guest requests to become a secure guest, and KVM
has the opportunity to veto the transition.
If present, this capability can be enabled for a VM, meaning that KVM
will allow the transition to secure guest mode. Otherwise KVM will
veto the transition.
8. Other capabilities.
======================

3
arch/powerpc/include/asm/kvm_asm.h
View File

@ -150,4 +150,7 @@
#define KVM_INST_FETCH_FAILED -1
/* Extract PO and XOP opcode fields */
#define PO_XOP_OPCODE_MASK 0xfc0007fe
#endif /* __POWERPC_KVM_ASM_H__ */

6
arch/powerpc/include/asm/kvm_book3s_uvmem.h
View File

@ -5,6 +5,7 @@
#ifdef CONFIG_PPC_UV
int kvmppc_uvmem_init(void);
void kvmppc_uvmem_free(void);
bool kvmppc_uvmem_available(void);
int kvmppc_uvmem_slot_init(struct kvm *kvm, const struct kvm_memory_slot *slot);
void kvmppc_uvmem_slot_free(struct kvm *kvm,
const struct kvm_memory_slot *slot);
@ -30,6 +31,11 @@ static inline int kvmppc_uvmem_init(void)
static inline void kvmppc_uvmem_free(void) { }
static inline bool kvmppc_uvmem_available(void)
{
return false;
}
static inline int
kvmppc_uvmem_slot_init(struct kvm *kvm, const struct kvm_memory_slot *slot)
{

1
arch/powerpc/include/asm/kvm_host.h
View File

@ -303,6 +303,7 @@ struct kvm_arch {
u8 radix;
u8 fwnmi_enabled;
u8 secure_guest;
u8 svm_enabled;
bool threads_indep;
bool nested_enable;
pgd_t *pgtable;

4
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -107,8 +107,6 @@ extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
unsigned int gtlb_idx);
extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
@ -289,7 +287,6 @@ struct kvmppc_ops {
int (*age_hva)(struct kvm *kvm, unsigned long start, unsigned long end);
int (*test_age_hva)(struct kvm *kvm, unsigned long hva);
void (*set_spte_hva)(struct kvm *kvm, unsigned long hva, pte_t pte);
void (*mmu_destroy)(struct kvm_vcpu *vcpu);
void (*free_memslot)(struct kvm_memory_slot *slot);
int (*init_vm)(struct kvm *kvm);
void (*destroy_vm)(struct kvm *kvm);
@ -316,6 +313,7 @@ struct kvmppc_ops {
int size);
int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size);
int (*enable_svm)(struct kvm *kvm);
int (*svm_off)(struct kvm *kvm);
};

5
arch/powerpc/kvm/book3s.c
View File

@ -858,11 +858,6 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
return 0;
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
}
int kvmppc_core_init_vm(struct kvm *kvm)
{

1
arch/powerpc/kvm/book3s.h
View File

@ -16,6 +16,7 @@ extern int kvm_age_hva_hv(struct kvm *kvm, unsigned long start,
extern int kvm_test_age_hva_hv(struct kvm *kvm, unsigned long hva);
extern void kvm_set_spte_hva_hv(struct kvm *kvm, unsigned long hva, pte_t pte);
extern int kvmppc_mmu_init_pr(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_destroy_pr(struct kvm_vcpu *vcpu);
extern int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);

2
arch/powerpc/kvm/book3s_32_mmu.c
View File

@ -234,7 +234,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
case 2:
case 6:
pte->may_write = true;
/* fall through */
fallthrough;
case 3:
case 5:
case 7:

2
arch/powerpc/kvm/book3s_32_mmu_host.c
View File

@ -356,7 +356,7 @@ void kvmppc_mmu_destroy_pr(struct kvm_vcpu *vcpu)
/* From mm/mmu_context_hash32.c */
#define CTX_TO_VSID(c, id) ((((c) * (897 * 16)) + (id * 0x111)) & 0xffffff)
int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
int kvmppc_mmu_init_pr(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
int err;

2
arch/powerpc/kvm/book3s_64_mmu.c
View File

@ -311,7 +311,7 @@ do_second:
case 2:
case 6:
gpte->may_write = true;
/* fall through */
fallthrough;
case 3:
case 5:
case 7:

2
arch/powerpc/kvm/book3s_64_mmu_host.c
View File

@ -384,7 +384,7 @@ void kvmppc_mmu_destroy_pr(struct kvm_vcpu *vcpu)
__destroy_context(to_book3s(vcpu)->context_id[0]);
}
int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
int kvmppc_mmu_init_pr(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
int err;

119
arch/powerpc/kvm/book3s_64_mmu_hv.c
View File

@ -485,18 +485,18 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
__be64 *hptep;
unsigned long mmu_seq, psize, pte_size;
unsigned long gpa_base, gfn_base;
unsigned long gpa, gfn, hva, pfn;
unsigned long gpa, gfn, hva, pfn, hpa;
struct kvm_memory_slot *memslot;
unsigned long *rmap;
struct revmap_entry *rev;
struct page *page, *pages[1];
long index, ret, npages;
struct page *page;
long index, ret;
bool is_ci;
unsigned int writing, write_ok;
struct vm_area_struct *vma;
bool writing, write_ok;
unsigned int shift;
unsigned long rcbits;
long mmio_update;
struct mm_struct *mm;
pte_t pte, *ptep;
if (kvm_is_radix(kvm))
return kvmppc_book3s_radix_page_fault(run, vcpu, ea, dsisr);
@ -570,59 +570,62 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
smp_rmb();
ret = -EFAULT;
is_ci = false;
pfn = 0;
page = NULL;
mm = kvm->mm;
pte_size = PAGE_SIZE;
writing = (dsisr & DSISR_ISSTORE) != 0;
/* If writing != 0, then the HPTE must allow writing, if we get here */
write_ok = writing;
hva = gfn_to_hva_memslot(memslot, gfn);
npages = get_user_pages_fast(hva, 1, writing ? FOLL_WRITE : 0, pages);
if (npages < 1) {
/* Check if it's an I/O mapping */
down_read(&mm->mmap_sem);
vma = find_vma(mm, hva);
if (vma && vma->vm_start <= hva && hva + psize <= vma->vm_end &&
(vma->vm_flags & VM_PFNMAP)) {
pfn = vma->vm_pgoff +
((hva - vma->vm_start) >> PAGE_SHIFT);
pte_size = psize;
is_ci = pte_ci(__pte((pgprot_val(vma->vm_page_prot))));
write_ok = vma->vm_flags & VM_WRITE;
}
up_read(&mm->mmap_sem);
if (!pfn)
goto out_put;
/*
* Do a fast check first, since __gfn_to_pfn_memslot doesn't
* do it with !atomic && !async, which is how we call it.
* We always ask for write permission since the common case
* is that the page is writable.
*/
if (__get_user_pages_fast(hva, 1, 1, &page) == 1) {
write_ok = true;
} else {
page = pages[0];
pfn = page_to_pfn(page);
if (PageHuge(page)) {
page = compound_head(page);
pte_size <<= compound_order(page);
}
/* if the guest wants write access, see if that is OK */
if (!writing && hpte_is_writable(r)) {
pte_t *ptep, pte;
unsigned long flags;
/*
* We need to protect against page table destruction
* hugepage split and collapse.
*/
local_irq_save(flags);
ptep = find_current_mm_pte(mm->pgd, hva, NULL, NULL);
if (ptep) {
pte = kvmppc_read_update_linux_pte(ptep, 1);
if (__pte_write(pte))
write_ok = 1;
}
local_irq_restore(flags);
/* Call KVM generic code to do the slow-path check */
pfn = __gfn_to_pfn_memslot(memslot, gfn, false, NULL,
writing, &write_ok);
if (is_error_noslot_pfn(pfn))
return -EFAULT;
page = NULL;
if (pfn_valid(pfn)) {
page = pfn_to_page(pfn);
if (PageReserved(page))
page = NULL;
}
}
/*
* Read the PTE from the process' radix tree and use that
* so we get the shift and attribute bits.
*/
local_irq_disable();
ptep = __find_linux_pte(vcpu->arch.pgdir, hva, NULL, &shift);
/*
* If the PTE disappeared temporarily due to a THP
* collapse, just return and let the guest try again.
*/
if (!ptep) {
local_irq_enable();
if (page)
put_page(page);
return RESUME_GUEST;
}
pte = *ptep;
local_irq_enable();
hpa = pte_pfn(pte) << PAGE_SHIFT;
pte_size = PAGE_SIZE;
if (shift)
pte_size = 1ul << shift;
is_ci = pte_ci(pte);
if (psize > pte_size)
goto out_put;
if (pte_size > psize)
hpa |= hva & (pte_size - psize);
/* Check WIMG vs. the actual page we're accessing */
if (!hpte_cache_flags_ok(r, is_ci)) {
@ -636,14 +639,13 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
}
/*
* Set the HPTE to point to pfn.
* Since the pfn is at PAGE_SIZE granularity, make sure we
* Set the HPTE to point to hpa.
* Since the hpa is at PAGE_SIZE granularity, make sure we
* don't mask out lower-order bits if psize < PAGE_SIZE.
*/
if (psize < PAGE_SIZE)
psize = PAGE_SIZE;
r = (r & HPTE_R_KEY_HI) | (r & ~(HPTE_R_PP0 - psize)) |
((pfn << PAGE_SHIFT) & ~(psize - 1));
r = (r & HPTE_R_KEY_HI) | (r & ~(HPTE_R_PP0 - psize)) | hpa;
if (hpte_is_writable(r) && !write_ok)
r = hpte_make_readonly(r);
ret = RESUME_GUEST;
@ -708,20 +710,13 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
asm volatile("ptesync" : : : "memory");
preempt_enable();
if (page && hpte_is_writable(r))
SetPageDirty(page);
set_page_dirty_lock(page);
out_put:
trace_kvm_page_fault_exit(vcpu, hpte, ret);
if (page) {
/*
* We drop pages[0] here, not page because page might
* have been set to the head page of a compound, but
* we have to drop the reference on the correct tail
* page to match the get inside gup()
*/
put_page(pages[0]);
}
if (page)
put_page(page);
return ret;
out_unlock:

2
arch/powerpc/kvm/book3s_64_mmu_radix.c
View File

@ -425,7 +425,7 @@ static void kvmppc_unmap_free_pte(struct kvm *kvm, pte_t *pte, bool full,
unsigned int lpid)
{
if (full) {
memset(pte, 0, sizeof(long) << PTE_INDEX_SIZE);
memset(pte, 0, sizeof(long) << RADIX_PTE_INDEX_SIZE);
} else {
pte_t *p = pte;
unsigned long it;

55
arch/powerpc/kvm/book3s_hv.c
View File

@ -1073,25 +1073,35 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
kvmppc_get_gpr(vcpu, 6));
break;
case H_SVM_PAGE_IN:
ret = kvmppc_h_svm_page_in(vcpu->kvm,
kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6));
ret = H_UNSUPPORTED;
if (kvmppc_get_srr1(vcpu) & MSR_S)
ret = kvmppc_h_svm_page_in(vcpu->kvm,
kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6));
break;
case H_SVM_PAGE_OUT:
ret = kvmppc_h_svm_page_out(vcpu->kvm,
kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6));
ret = H_UNSUPPORTED;
if (kvmppc_get_srr1(vcpu) & MSR_S)
ret = kvmppc_h_svm_page_out(vcpu->kvm,
kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6));
break;
case H_SVM_INIT_START:
ret = kvmppc_h_svm_init_start(vcpu->kvm);
ret = H_UNSUPPORTED;
if (kvmppc_get_srr1(vcpu) & MSR_S)
ret = kvmppc_h_svm_init_start(vcpu->kvm);
break;
case H_SVM_INIT_DONE:
ret = kvmppc_h_svm_init_done(vcpu->kvm);
ret = H_UNSUPPORTED;
if (kvmppc_get_srr1(vcpu) & MSR_S)
ret = kvmppc_h_svm_init_done(vcpu->kvm);
break;
case H_SVM_INIT_ABORT:
ret = kvmppc_h_svm_init_abort(vcpu->kvm);
ret = H_UNSUPPORTED;
if (kvmppc_get_srr1(vcpu) & MSR_S)
ret = kvmppc_h_svm_init_abort(vcpu->kvm);
break;
default:
@ -3615,6 +3625,7 @@ int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
if (trap == BOOK3S_INTERRUPT_SYSCALL && !vcpu->arch.nested &&
kvmppc_get_gpr(vcpu, 3) == H_CEDE) {
kvmppc_nested_cede(vcpu);
kvmppc_set_gpr(vcpu, 3, 0);
trap = 0;
}
} else {
@ -4554,11 +4565,6 @@ void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
}
}
static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu)
{
return;
}
void kvmppc_setup_partition_table(struct kvm *kvm)
{
unsigned long dw0, dw1;
@ -5422,6 +5428,21 @@ static void unpin_vpa_reset(struct kvm *kvm, struct kvmppc_vpa *vpa)
vpa->update_pending = 0;
}
/*
* Enable a guest to become a secure VM, or test whether
* that could be enabled.
* Called when the KVM_CAP_PPC_SECURE_GUEST capability is
* tested (kvm == NULL) or enabled (kvm != NULL).
*/
static int kvmhv_enable_svm(struct kvm *kvm)
{
if (!kvmppc_uvmem_available())
return -EINVAL;
if (kvm)
kvm->arch.svm_enabled = 1;
return 0;
}
/*
* IOCTL handler to turn off secure mode of guest
*
@ -5522,7 +5543,6 @@ static struct kvmppc_ops kvm_ops_hv = {
.age_hva = kvm_age_hva_hv,
.test_age_hva = kvm_test_age_hva_hv,
.set_spte_hva = kvm_set_spte_hva_hv,
.mmu_destroy = kvmppc_mmu_destroy_hv,
.free_memslot = kvmppc_core_free_memslot_hv,
.init_vm = kvmppc_core_init_vm_hv,
.destroy_vm = kvmppc_core_destroy_vm_hv,
@ -5543,6 +5563,7 @@ static struct kvmppc_ops kvm_ops_hv = {
.enable_nested = kvmhv_enable_nested,
.load_from_eaddr = kvmhv_load_from_eaddr,
.store_to_eaddr = kvmhv_store_to_eaddr,
.enable_svm = kvmhv_enable_svm,
.svm_off = kvmhv_svm_off,
};

28
arch/powerpc/kvm/book3s_hv_tm.c
View File

@ -3,6 +3,8 @@
* Copyright 2017 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kvm_host.h>
#include <asm/kvm_ppc.h>
@ -44,7 +46,18 @@ int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu)
u64 newmsr, bescr;
int ra, rs;
switch (instr & 0xfc0007ff) {
/*
* rfid, rfebb, and mtmsrd encode bit 31 = 0 since it's a reserved bit
* in these instructions, so masking bit 31 out doesn't change these
* instructions. For treclaim., tsr., and trechkpt. instructions if bit
* 31 = 0 then they are per ISA invalid forms, however P9 UM, in section
* 4.6.10 Book II Invalid Forms, informs specifically that ignoring bit
* 31 is an acceptable way to handle these invalid forms that have
* bit 31 = 0. Moreover, for emulation purposes both forms (w/ and wo/
* bit 31 set) can generate a softpatch interrupt. Hence both forms
* are handled below for these instructions so they behave the same way.
*/
switch (instr & PO_XOP_OPCODE_MASK) {
case PPC_INST_RFID:
/* XXX do we need to check for PR=0 here? */
newmsr = vcpu->arch.shregs.srr1;
@ -105,7 +118,8 @@ int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu)
vcpu->arch.shregs.msr = newmsr;
return RESUME_GUEST;
case PPC_INST_TSR:
/* ignore bit 31, see comment above */
case (PPC_INST_TSR & PO_XOP_OPCODE_MASK):
/* check for PR=1 and arch 2.06 bit set in PCR */
if ((msr & MSR_PR) && (vcpu->arch.vcore->pcr & PCR_ARCH_206)) {
/* generate an illegal instruction interrupt */
@ -140,7 +154,8 @@ int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu)
vcpu->arch.shregs.msr = msr;
return RESUME_GUEST;
case PPC_INST_TRECLAIM:
/* ignore bit 31, see comment above */
case (PPC_INST_TRECLAIM & PO_XOP_OPCODE_MASK):
/* check for TM disabled in the HFSCR or MSR */
if (!(vcpu->arch.hfscr & HFSCR_TM)) {
/* generate an illegal instruction interrupt */
@ -176,7 +191,8 @@ int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu)
vcpu->arch.shregs.msr &= ~MSR_TS_MASK;
return RESUME_GUEST;
case PPC_INST_TRECHKPT:
/* ignore bit 31, see comment above */
case (PPC_INST_TRECHKPT & PO_XOP_OPCODE_MASK):
/* XXX do we need to check for PR=0 here? */
/* check for TM disabled in the HFSCR or MSR */
if (!(vcpu->arch.hfscr & HFSCR_TM)) {
@ -208,6 +224,8 @@ int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu)
}
/* What should we do here? We didn't recognize the instruction */
WARN_ON_ONCE(1);
kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
pr_warn_ratelimited("Unrecognized TM-related instruction %#x for emulation", instr);
return RESUME_GUEST;
}

16
arch/powerpc/kvm/book3s_hv_tm_builtin.c
View File

@ -23,7 +23,18 @@ int kvmhv_p9_tm_emulation_early(struct kvm_vcpu *vcpu)
u64 newmsr, msr, bescr;
int rs;
switch (instr & 0xfc0007ff) {
/*
* rfid, rfebb, and mtmsrd encode bit 31 = 0 since it's a reserved bit
* in these instructions, so masking bit 31 out doesn't change these
* instructions. For the tsr. instruction if bit 31 = 0 then it is per
* ISA an invalid form, however P9 UM, in section 4.6.10 Book II Invalid
* Forms, informs specifically that ignoring bit 31 is an acceptable way
* to handle TM-related invalid forms that have bit 31 = 0. Moreover,
* for emulation purposes both forms (w/ and wo/ bit 31 set) can
* generate a softpatch interrupt. Hence both forms are handled below
* for tsr. to make them behave the same way.
*/
switch (instr & PO_XOP_OPCODE_MASK) {
case PPC_INST_RFID:
/* XXX do we need to check for PR=0 here? */
newmsr = vcpu->arch.shregs.srr1;
@ -73,7 +84,8 @@ int kvmhv_p9_tm_emulation_early(struct kvm_vcpu *vcpu)
vcpu->arch.shregs.msr = newmsr;
return 1;
case PPC_INST_TSR:
/* ignore bit 31, see comment above */
case (PPC_INST_TSR & PO_XOP_OPCODE_MASK):
/* we know the MSR has the TS field = S (0b01) here */
msr = vcpu->arch.shregs.msr;
/* check for PR=1 and arch 2.06 bit set in PCR */

19
arch/powerpc/kvm/book3s_hv_uvmem.c
View File

@ -113,6 +113,15 @@ struct kvmppc_uvmem_page_pvt {
bool skip_page_out;
};
bool kvmppc_uvmem_available(void)
{
/*
* If kvmppc_uvmem_bitmap != NULL, then there is an ultravisor
* and our data structures have been initialized successfully.
*/
return !!kvmppc_uvmem_bitmap;
}
int kvmppc_uvmem_slot_init(struct kvm *kvm, const struct kvm_memory_slot *slot)
{
struct kvmppc_uvmem_slot *p;
@ -209,6 +218,8 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm)
int ret = H_SUCCESS;
int srcu_idx;
kvm->arch.secure_guest = KVMPPC_SECURE_INIT_START;
if (!kvmppc_uvmem_bitmap)
return H_UNSUPPORTED;
@ -216,6 +227,10 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm)
if (!kvm_is_radix(kvm))
return H_UNSUPPORTED;
/* NAK the transition to secure if not enabled */
if (!kvm->arch.svm_enabled)
return H_AUTHORITY;
srcu_idx = srcu_read_lock(&kvm->srcu);
slots = kvm_memslots(kvm);
kvm_for_each_memslot(memslot, slots) {
@ -233,7 +248,6 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm)
goto out;
}
}
kvm->arch.secure_guest |= KVMPPC_SECURE_INIT_START;
out:
srcu_read_unlock(&kvm->srcu, srcu_idx);
return ret;
@ -806,6 +820,9 @@ out:
void kvmppc_uvmem_free(void)
{
if (!kvmppc_uvmem_bitmap)
return;
memunmap_pages(&kvmppc_uvmem_pgmap);
release_mem_region(kvmppc_uvmem_pgmap.res.start,
resource_size(&kvmppc_uvmem_pgmap.res));

6
arch/powerpc/kvm/book3s_pr.c
View File

@ -740,7 +740,7 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
(vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
pte.raddr &= ~SPLIT_HACK_MASK;
/* fall through */
fallthrough;
case MSR_IR:
vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
@ -1795,7 +1795,7 @@ static int kvmppc_core_vcpu_create_pr(struct kvm_vcpu *vcpu)
vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
err = kvmppc_mmu_init(vcpu);
err = kvmppc_mmu_init_pr(vcpu);
if (err < 0)
goto free_shared_page;
@ -1817,6 +1817,7 @@ static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
kvmppc_mmu_destroy_pr(vcpu);
free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
kfree(vcpu->arch.shadow_vcpu);
@ -2086,7 +2087,6 @@ static struct kvmppc_ops kvm_ops_pr = {
.age_hva = kvm_age_hva_pr,
.test_age_hva = kvm_test_age_hva_pr,
.set_spte_hva = kvm_set_spte_hva_pr,
.mmu_destroy = kvmppc_mmu_destroy_pr,
.free_memslot = kvmppc_core_free_memslot_pr,
.init_vm = kvmppc_core_init_vm_pr,
.destroy_vm = kvmppc_core_destroy_vm_pr,

11
arch/powerpc/kvm/booke.c
View File

@ -421,11 +421,11 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
case BOOKE_IRQPRIO_DATA_STORAGE:
case BOOKE_IRQPRIO_ALIGNMENT:
update_dear = true;
/* fall through */
fallthrough;
case BOOKE_IRQPRIO_INST_STORAGE:
case BOOKE_IRQPRIO_PROGRAM:
update_esr = true;
/* fall through */
fallthrough;
case BOOKE_IRQPRIO_ITLB_MISS:
case BOOKE_IRQPRIO_SYSCALL:
case BOOKE_IRQPRIO_FP_UNAVAIL:
@ -459,7 +459,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
case BOOKE_IRQPRIO_DECREMENTER:
case BOOKE_IRQPRIO_FIT:
keep_irq = true;
/* fall through */
fallthrough;
case BOOKE_IRQPRIO_EXTERNAL:
case BOOKE_IRQPRIO_DBELL:
allowed = vcpu->arch.shared->msr & MSR_EE;
@ -2073,11 +2073,6 @@ void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
kvmppc_clear_dbsr();
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
}
int kvmppc_core_init_vm(struct kvm *kvm)
{
return kvm->arch.kvm_ops->init_vm(kvm);

2
arch/powerpc/kvm/booke.h
View File

@ -94,7 +94,6 @@ enum int_class {
void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
extern void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu);
extern int kvmppc_core_emulate_op_e500(struct kvm_run *run,
struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);
@ -102,7 +101,6 @@ extern int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn,
ulong spr_val);
extern int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn,
ulong *spr_val);
extern void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu);
extern int kvmppc_core_emulate_op_e500(struct kvm_run *run,
struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);

1
arch/powerpc/kvm/e500.c
View File

@ -490,7 +490,6 @@ static struct kvmppc_ops kvm_ops_e500 = {
.vcpu_put = kvmppc_core_vcpu_put_e500,
.vcpu_create = kvmppc_core_vcpu_create_e500,
.vcpu_free = kvmppc_core_vcpu_free_e500,
.mmu_destroy = kvmppc_mmu_destroy_e500,
.init_vm = kvmppc_core_init_vm_e500,
.destroy_vm = kvmppc_core_destroy_vm_e500,
.emulate_op = kvmppc_core_emulate_op_e500,

4
arch/powerpc/kvm/e500_mmu.c
View File

@ -533,10 +533,6 @@ gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
}
void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu)
{
}
/*****************************************/
static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)

1
arch/powerpc/kvm/e500mc.c
View File

@ -376,7 +376,6 @@ static struct kvmppc_ops kvm_ops_e500mc = {
.vcpu_put = kvmppc_core_vcpu_put_e500mc,
.vcpu_create = kvmppc_core_vcpu_create_e500mc,
.vcpu_free = kvmppc_core_vcpu_free_e500mc,
.mmu_destroy = kvmppc_mmu_destroy_e500,
.init_vm = kvmppc_core_init_vm_e500mc,
.destroy_vm = kvmppc_core_destroy_vm_e500mc,
.emulate_op = kvmppc_core_emulate_op_e500,

17
arch/powerpc/kvm/powerpc.c
View File

@ -524,7 +524,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
/* fall through */
case KVM_CAP_PPC_PAIRED_SINGLES:
case KVM_CAP_PPC_OSI:
case KVM_CAP_PPC_GET_PVINFO:
@ -669,6 +668,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
(hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
break;
#endif
#if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
case KVM_CAP_PPC_SECURE_GUEST:
r = hv_enabled && kvmppc_hv_ops->enable_svm &&
!kvmppc_hv_ops->enable_svm(NULL);
break;
#endif
default:
r = 0;
@ -751,7 +756,6 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
return 0;
out_vcpu_uninit:
kvmppc_mmu_destroy(vcpu);
kvmppc_subarch_vcpu_uninit(vcpu);
return err;
}
@ -784,7 +788,6 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
kvmppc_core_vcpu_free(vcpu);
kvmppc_mmu_destroy(vcpu);
kvmppc_subarch_vcpu_uninit(vcpu);
}
@ -2169,6 +2172,14 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
break;
r = kvm->arch.kvm_ops->enable_nested(kvm);
break;
#endif
#if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
case KVM_CAP_PPC_SECURE_GUEST:
r = -EINVAL;
if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
break;
r = kvm->arch.kvm_ops->enable_svm(kvm);
break;
#endif
default:
r = -EINVAL;

1
include/uapi/linux/kvm.h
View File

@ -1016,6 +1016,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_ARM_INJECT_EXT_DABT 178
#define KVM_CAP_S390_VCPU_RESETS 179
#define KVM_CAP_S390_PROTECTED 180
#define KVM_CAP_PPC_SECURE_GUEST 181
#ifdef KVM_CAP_IRQ_ROUTING