[PATCH v3 1/5] RISC-V: KVM: Add the split page cache for ioctl context

[Wang Yechao]

Add the split page cache for dirty logging enablement and the
KVM_CLEAR_DIRTY_LOG ioctl.

Signed-off-by: Wang Yechao <wang.yechao255@xxxxxxxxxx>
---
 arch/riscv/include/asm/kvm_host.h | 1 +
 arch/riscv/kvm/mmu.c              | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index 60017ceec9d2a..69f73fd106a94 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -86,6 +86,7 @@ struct kvm_arch {
     pgd_t *pgd;
     phys_addr_t pgd_phys;
     unsigned long pgd_levels;
+    struct kvm_mmu_memory_cache pgd_split_page_cache;
 
     /* Guest Timer */
     struct kvm_guest_timer timer;
diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
index 082f9b2617338..d69fba7d8e9a6 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -676,6 +676,7 @@ int kvm_riscv_mmu_alloc_pgd(struct kvm *kvm)
     kvm->arch.pgd = page_to_virt(pgd_page);
     kvm->arch.pgd_phys = page_to_phys(pgd_page);
     kvm->arch.pgd_levels = kvm_riscv_gstage_max_pgd_levels;
+    kvm->arch.pgd_split_page_cache.gfp_zero = __GFP_ZERO;
 
     return 0;
 }
@@ -703,6 +704,8 @@ void kvm_riscv_mmu_free_pgd(struct kvm *kvm)
 
     if (pgd)
         free_pages((unsigned long)pgd, get_order(kvm_riscv_gstage_pgd_size));
+
+    kvm_mmu_free_memory_cache(&kvm->arch.pgd_split_page_cache);
 }
 
 void kvm_riscv_mmu_update_hgatp(struct kvm_vcpu *vcpu)
-- 
2.43.5