diff options
| author | Anup Patel <apatel@ventanamicro.com> | 2025-06-05 11:44:46 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-27 11:07:41 +0100 |
| commit | 8a8b342332e27280e48d0f7013d70b4e688947af (patch) | |
| tree | 17d0ef3b87813b79bcba7fcca77eeb1994ba3b96 | |
| parent | fe399aa5a4f4df229979283aa3494be4fce41ed2 (diff) | |
RISC-V: KVM: Fix the size parameter check in SBI SFENCE calls
[ Upstream commit 6aba0cb5bba6141158d5449f2cf53187b7f755f9 ]
As-per the SBI specification, an SBI remote fence operation applies
to the entire address space if either:
1) start_addr and size are both 0
2) size is equal to 2^XLEN-1
>From the above, only #1 is checked by SBI SFENCE calls so fix the
size parameter check in SBI SFENCE calls to cover #2 as well.
Fixes: 13acfec2dbcc ("RISC-V: KVM: Add remote HFENCE functions based on VCPU requests")
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250605061458.196003-2-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/riscv/kvm/vcpu_sbi_replace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/kvm/vcpu_sbi_replace.c b/arch/riscv/kvm/vcpu_sbi_replace.c index 4c034d8a606a..304d29383e6c 100644 --- a/arch/riscv/kvm/vcpu_sbi_replace.c +++ b/arch/riscv/kvm/vcpu_sbi_replace.c @@ -91,14 +91,14 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run kvm_riscv_fence_i(vcpu->kvm, hbase, hmask); break; case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA: - if (cp->a2 == 0 && cp->a3 == 0) + if ((cp->a2 == 0 && cp->a3 == 0) || cp->a3 == -1UL) kvm_riscv_hfence_vvma_all(vcpu->kvm, hbase, hmask); else kvm_riscv_hfence_vvma_gva(vcpu->kvm, hbase, hmask, cp->a2, cp->a3, PAGE_SHIFT); break; case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID: - if (cp->a2 == 0 && cp->a3 == 0) + if ((cp->a2 == 0 && cp->a3 == 0) || cp->a3 == -1UL) kvm_riscv_hfence_vvma_asid_all(vcpu->kvm, hbase, hmask, cp->a4); else |