From: Anup Patel <apatel@ventanamicro.com>
Date: Fri, 29 Jul 2022 11:45:12 +0000 (+0530)
Subject: RISC-V: KVM: Use PAGE_KERNEL_IO in kvm_riscv_gstage_ioremap()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=659ad6d82c3121088daeaa38ba94d182b55bbb22;p=linux.git

RISC-V: KVM: Use PAGE_KERNEL_IO in kvm_riscv_gstage_ioremap()

When the host has Svpbmt extension, we should use page based memory
type 2 (i.e. IO) for IO mappings in the G-stage page table.

To achieve this, we replace use of PAGE_KERNEL with PAGE_KERNEL_IO
in the kvm_riscv_gstage_ioremap().

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
---

diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
index f7862ca4c4c6c..bc545aef60344 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -361,7 +361,7 @@ int kvm_riscv_gstage_ioremap(struct kvm *kvm, gpa_t gpa,
 	pfn = __phys_to_pfn(hpa);
 
 	for (addr = gpa; addr < end; addr += PAGE_SIZE) {
-		pte = pfn_pte(pfn, PAGE_KERNEL);
+		pte = pfn_pte(pfn, PAGE_KERNEL_IO);
 
 		if (!writable)
 			pte = pte_wrprotect(pte);