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KVM: PPC: Add skip_page_out parameter to uvmem functions

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Add 'skip_page_out' parameter to kvmppc_uvmem_drop_pages() so the
callers can specify whetheter or not to skip paging out pages. This
will be needed in a follow-on patch that implements H_SVM_INIT_ABORT
hcall.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Sukadev Bhattiprolu 2019-12-19 13:51:45 -08:00 committed by Paul Mackerras
parent e1bd0a7e24
commit ce477a7a1c
4 changed files with 6 additions and 6 deletions
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4
arch/powerpc/include/asm/kvm_book3s_uvmem.h
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@ -20,7 +20,7 @@ unsigned long kvmppc_h_svm_init_start(struct kvm *kvm);
unsigned long kvmppc_h_svm_init_done(struct kvm *kvm);
int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gfn);
void kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free,
struct kvm *kvm);
struct kvm *kvm, bool skip_page_out);
#else
static inline int kvmppc_uvmem_init(void)
{
@ -69,6 +69,6 @@ static inline int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gfn)
static inline void
kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free,
struct kvm *kvm) { }
struct kvm *kvm, bool skip_page_out) { }
#endif /* CONFIG_PPC_UV */
#endif /* __ASM_KVM_BOOK3S_UVMEM_H__ */

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

@ -1102,7 +1102,7 @@ void kvmppc_radix_flush_memslot(struct kvm *kvm,
unsigned int shift;
if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_START)
kvmppc_uvmem_drop_pages(memslot, kvm);
kvmppc_uvmem_drop_pages(memslot, kvm, true);
if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE)
return;

2
arch/powerpc/kvm/book3s_hv.c
View File

@ -5477,7 +5477,7 @@ static int kvmhv_svm_off(struct kvm *kvm)
continue;
kvm_for_each_memslot(memslot, slots) {
kvmppc_uvmem_drop_pages(memslot, kvm);
kvmppc_uvmem_drop_pages(memslot, kvm, true);
uv_unregister_mem_slot(kvm->arch.lpid, memslot->id);
}
}

4
arch/powerpc/kvm/book3s_hv_uvmem.c
View File

@ -258,7 +258,7 @@ unsigned long kvmppc_h_svm_init_done(struct kvm *kvm)
* QEMU page table with normal PTEs from newly allocated pages.
*/
void kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free,
struct kvm *kvm)
struct kvm *kvm, bool skip_page_out)
{
int i;
struct kvmppc_uvmem_page_pvt *pvt;
@ -276,7 +276,7 @@ void kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free,
uvmem_page = pfn_to_page(uvmem_pfn);
pvt = uvmem_page->zone_device_data;
pvt->skip_page_out = true;
pvt->skip_page_out = skip_page_out;
mutex_unlock(&kvm->arch.uvmem_lock);
pfn = gfn_to_pfn(kvm, gfn);