Add two interfaces of log dirty for kvm_main.c, and detele the interface
kvm_vm_ioctl_get_dirty_log which is redundantly defined.
CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT is added in defconfig.
Signed-off-by: Yifei Jiang <jiangyifei@xxxxxxxxxx>
Signed-off-by: Yipeng Yin <yinyipeng1@xxxxxxxxxx>
---
arch/riscv/configs/defconfig | 1 +
arch/riscv/kvm/Kconfig | 1 +
arch/riscv/kvm/mmu.c | 43 ++++++++++++++++++++++++++++++++++++
arch/riscv/kvm/vm.c | 6 -----
4 files changed, 45 insertions(+), 6 deletions(-)
diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index d36e1000bbd3..857d799672c2 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -19,6 +19,7 @@ CONFIG_SOC_VIRT=y
CONFIG_SMP=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
+CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y
CONFIG_HOTPLUG_CPU=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
diff --git a/arch/riscv/kvm/Kconfig b/arch/riscv/kvm/Kconfig
index 2356dc52ebb3..91fcffc70e5d 100644
--- a/arch/riscv/kvm/Kconfig
+++ b/arch/riscv/kvm/Kconfig
@@ -26,6 +26,7 @@ config KVM
select KVM_MMIO
select HAVE_KVM_VCPU_ASYNC_IOCTL
select SRCU
+ select KVM_GENERIC_DIRTYLOG_READ_PROTECT
help
Support hosting virtualized guest machines.
diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
index 88bce80ee983..df2a470c25e4 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -358,6 +358,43 @@ void stage2_wp_memory_region(struct kvm *kvm, int slot)
kvm_flush_remote_tlbs(kvm);
}
+/**
+ * kvm_mmu_write_protect_pt_masked() - write protect dirty pages
+ * @kvm: The KVM pointer
+ * @slot: The memory slot associated with mask
+ * @gfn_offset: The gfn offset in memory slot
+ * @mask: The mask of dirty pages at offset 'gfn_offset' in this memory
+ * slot to be write protected
+ *
+ * Walks bits set in mask write protects the associated pte's. Caller must
+ * acquire kvm_mmu_lock.
+ */
+static void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ gfn_t gfn_offset, unsigned long mask)
+{
+ phys_addr_t base_gfn = slot->base_gfn + gfn_offset;
+ phys_addr_t start = (base_gfn + __ffs(mask)) << PAGE_SHIFT;
+ phys_addr_t end = (base_gfn + __fls(mask) + 1) << PAGE_SHIFT;
+
+ stage2_wp_range(kvm, start, end);
+}
+
+/*
+ * kvm_arch_mmu_enable_log_dirty_pt_masked - enable dirty logging for selected
+ * dirty pages.
+ *
+ * It calls kvm_mmu_write_protect_pt_masked to write protect selected pages to
+ * enable dirty logging for them.
+ */
+void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ gfn_t gfn_offset, unsigned long mask)
+{
+ kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask);
+}
+
+
int stage2_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa,
unsigned long size, bool writable)
{
@@ -433,6 +470,12 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
{
}
+void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
+ struct kvm_memory_slot *memslot)
+{
+ kvm_flush_remote_tlbs(kvm);
+}
+
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free)
{
}
diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c
index 4f2498198cb5..f7405676903b 100644
--- a/arch/riscv/kvm/vm.c
+++ b/arch/riscv/kvm/vm.c
@@ -12,12 +12,6 @@
#include <linux/uaccess.h>
#include <linux/kvm_host.h>
-int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
-{
- /* TODO: To be added later. */
- return -ENOTSUPP;
-}
-
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
int r;
--
2.19.1
