diff options
| author | Anup Patel <apatel@ventanamicro.com> | 2025-06-18 17:05:26 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2025-07-28 22:27:18 +0530 |
| commit | ca539ba4bc980610b68dba345b18208c0279b2b1 (patch) | |
| tree | 38051071424da3f3b6d0adebac41237c7bb6e31c | |
| parent | eaa98ba20be088eeb252061f216c299442ba5a69 (diff) | |
RISC-V: KVM: Implement kvm_arch_flush_remote_tlbs_range()
The kvm_arch_flush_remote_tlbs_range() expected by KVM core can be
easily implemented for RISC-V using kvm_riscv_hfence_gvma_vmid_gpa()
hence provide it.
Also with kvm_arch_flush_remote_tlbs_range() available for RISC-V, the
mmu_wp_memory_region() can happily use kvm_flush_remote_tlbs_memslot()
instead of kvm_flush_remote_tlbs().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-7-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/riscv/kvm/mmu.c | 2 | ||||
| -rw-r--r-- | arch/riscv/kvm/tlb.c | 8 |
3 files changed, 11 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 1ca477b2adb2..536a12fce040 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -42,6 +42,8 @@ KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) #define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(6) +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE + #define KVM_HEDELEG_DEFAULT (BIT(EXC_INST_MISALIGNED) | \ BIT(EXC_BREAKPOINT) | \ BIT(EXC_SYSCALL) | \ diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 29f1bd853a66..a5387927a1c1 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -344,7 +344,7 @@ static void gstage_wp_memory_region(struct kvm *kvm, int slot) spin_lock(&kvm->mmu_lock); gstage_wp_range(kvm, start, end); spin_unlock(&kvm->mmu_lock); - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_memslot(kvm, memslot); } int kvm_riscv_gstage_ioremap(struct kvm *kvm, gpa_t gpa, diff --git a/arch/riscv/kvm/tlb.c b/arch/riscv/kvm/tlb.c index da98ca801d31..f46a27658c2e 100644 --- a/arch/riscv/kvm/tlb.c +++ b/arch/riscv/kvm/tlb.c @@ -403,3 +403,11 @@ void kvm_riscv_hfence_vvma_all(struct kvm *kvm, make_xfence_request(kvm, hbase, hmask, KVM_REQ_HFENCE_VVMA_ALL, KVM_REQ_HFENCE_VVMA_ALL, NULL); } + +int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, u64 nr_pages) +{ + kvm_riscv_hfence_gvma_vmid_gpa(kvm, -1UL, 0, + gfn << PAGE_SHIFT, nr_pages << PAGE_SHIFT, + PAGE_SHIFT); + return 0; +} |