[PATCH v13 54/85] KVM: PPC: e500: Use __kvm_faultin_pfn() to handle page faults

Sean Christopherson
2024-10-10T18:26:48Z

Convert PPC e500 to use __kvm_faultin_pfn()+kvm_release_faultin_page(),
and continue the inexorable march towards the demise of
kvm_pfn_to_refcounted_page().

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/powerpc/kvm/e500_mmu_host.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index 334dd96f8081..e5a145b578a4 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -322,6 +322,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
{
struct kvm_memory_slot *slot;
unsigned long pfn = 0; /* silence GCC warning */
+ struct page *page = NULL;
unsigned long hva;
int pfnmap = 0;
int tsize = BOOK3E_PAGESZ_4K;
@@ -443,7 +444,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,

if (likely(!pfnmap)) {
tsize_pages = 1UL << (tsize + 10 - PAGE_SHIFT);
- pfn = gfn_to_pfn_memslot(slot, gfn);
+ pfn = __kvm_faultin_pfn(slot, gfn, FOLL_WRITE, NULL, &page);
if (is_error_noslot_pfn(pfn)) {
if (printk_ratelimit())
pr_err("%s: real page not found for gfn %lx\n",
@@ -488,8 +489,6 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
}
}
writable = kvmppc_e500_ref_setup(ref, gtlbe, pfn, wimg);
- if (writable)
- kvm_set_pfn_dirty(pfn);

kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
ref, gvaddr, stlbe);
@@ -498,8 +497,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
kvmppc_mmu_flush_icache(pfn);

out:
- /* Drop refcount on page, so that mmu notifiers can clear it */
- kvm_release_pfn_clean(pfn);
+ kvm_release_faultin_page(kvm, page, !!ret, writable);
spin_unlock(&kvm->mmu_lock);
return ret;
}
--
2.47.0.rc1.288.g06298d1525-goog