linux-kernel - [PATCH v2 17/29] LoongArch: KVM: Implement virtual machine tlb operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 20 Feb 2023 14:57:23 +0800
From:   Tianrui Zhao <zhaotianrui@...ngson.cn>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Mark Brown <broonie@...nel.org>,
        Alex Deucher <alexander.deucher@....com>,
        Oliver Upton <oliver.upton@...ux.dev>, maobibo@...ngson.cn
Subject: [PATCH v2 17/29] LoongArch: KVM: Implement virtual machine tlb operations

Implement loongarch virtual machine tlb operations such as flush tlb by
specific gpa parameter and flush all of the virt machines tlb.

Signed-off-by: Tianrui Zhao <zhaotianrui@...ngson.cn>
---
 arch/loongarch/kvm/tlb.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 arch/loongarch/kvm/tlb.c

diff --git a/arch/loongarch/kvm/tlb.c b/arch/loongarch/kvm/tlb.c
new file mode 100644
index 000000000..66e116cf2
--- /dev/null
+++ b/arch/loongarch/kvm/tlb.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/kvm_host.h>
+#include <asm/tlb.h>
+
+int kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
+{
+	preempt_disable();
+	gpa &= (PAGE_MASK << 1);
+	invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
+	preempt_enable();
+	return 0;
+}
+
+/**
+ * kvm_flush_tlb_all() - Flush all root TLB entries for
+ * guests.
+ *
+ * Invalidate all entries including GVA-->GPA and GPA-->HPA mappings.
+ */
+void kvm_flush_tlb_all(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	invtlb_all(INVTLB_ALLGID, 0, 0);
+	local_irq_restore(flags);
+}
-- 
2.31.1