github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 09:04:39 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

LoongArch: KVM: Add address alignment check for IOCSR emulation

Browse Source 
IOCSR instruction supports 1/2/4/8 bytes access, the address should be
naturally aligned with its access size. Here address alignment check is
added in the EIOINTC kernel emulation.

Cc: stable@vger.kernel.org
Fixes: 3956a52bc0 ("LoongArch: KVM: Add EIOINTC read and write functions")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2025-06-27 18:27:44 +08:00 committed by Huacai Chen
parent 080e8d2ecd
commit 9159c5e733
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/loongarch/kvm/intc/eiointc.c
View File

@ -305,6 +305,11 @@ static int kvm_eiointc_read(struct kvm_vcpu *vcpu,
return -EINVAL;
}
if (addr & (len - 1)) {
kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, len);
return -EINVAL;
}
vcpu->kvm->stat.eiointc_read_exits++;
spin_lock_irqsave(&eiointc->lock, flags);
switch (len) {
@ -676,6 +681,11 @@ static int kvm_eiointc_write(struct kvm_vcpu *vcpu,
return -EINVAL;
}
if (addr & (len - 1)) {
kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, len);
return -EINVAL;
}
vcpu->kvm->stat.eiointc_write_exits++;
spin_lock_irqsave(&eiointc->lock, flags);
switch (len) {