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Wed, 15 Jan 2025 10:31:03 -0800 (PST) From: Atish Patra Date: Wed, 15 Jan 2025 10:30:47 -0800 Subject: [PATCH v2 7/9] RISC-V: KVM: Use the new gpa range validate helper function Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250115-pmu_event_info-v2-7-84815b70383b@rivosinc.com> References: <20250115-pmu_event_info-v2-0-84815b70383b@rivosinc.com> In-Reply-To: <20250115-pmu_event_info-v2-0-84815b70383b@rivosinc.com> To: Anup Patel , Will Deacon , Mark Rutland , Paul Walmsley , Palmer Dabbelt , Mayuresh Chitale Cc: linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Atish Patra X-Mailer: b4 0.15-dev-13183 Remove the duplicate code and use the new helper function to validate the shared memory gpa address. Signed-off-by: Atish Patra --- arch/riscv/kvm/vcpu_pmu.c | 5 +---- arch/riscv/kvm/vcpu_sbi_sta.c | 6 ++---- 2 files changed, 3 insertions(+), 8 deletions(-) diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c index efd66835c2b8..ca23427edfaa 100644 --- a/arch/riscv/kvm/vcpu_pmu.c +++ b/arch/riscv/kvm/vcpu_pmu.c @@ -409,8 +409,6 @@ int kvm_riscv_vcpu_pmu_snapshot_set_shmem(struct kvm_vc= pu *vcpu, unsigned long s int snapshot_area_size =3D sizeof(struct riscv_pmu_snapshot_data); int sbiret =3D 0; gpa_t saddr; - unsigned long hva; - bool writable; =20 if (!kvpmu || flags) { sbiret =3D SBI_ERR_INVALID_PARAM; @@ -432,8 +430,7 @@ int kvm_riscv_vcpu_pmu_snapshot_set_shmem(struct kvm_vc= pu *vcpu, unsigned long s goto out; } =20 - hva =3D kvm_vcpu_gfn_to_hva_prot(vcpu, saddr >> PAGE_SHIFT, &writable); - if (kvm_is_error_hva(hva) || !writable) { + if (kvm_vcpu_validate_gpa_range(vcpu, saddr, PAGE_SIZE, true)) { sbiret =3D SBI_ERR_INVALID_ADDRESS; goto out; } diff --git a/arch/riscv/kvm/vcpu_sbi_sta.c b/arch/riscv/kvm/vcpu_sbi_sta.c index 5f35427114c1..67dfb613df6a 100644 --- a/arch/riscv/kvm/vcpu_sbi_sta.c +++ b/arch/riscv/kvm/vcpu_sbi_sta.c @@ -85,8 +85,6 @@ static int kvm_sbi_sta_steal_time_set_shmem(struct kvm_vc= pu *vcpu) unsigned long shmem_phys_hi =3D cp->a1; u32 flags =3D cp->a2; struct sbi_sta_struct zero_sta =3D {0}; - unsigned long hva; - bool writable; gpa_t shmem; int ret; =20 @@ -111,8 +109,8 @@ static int kvm_sbi_sta_steal_time_set_shmem(struct kvm_= vcpu *vcpu) return SBI_ERR_INVALID_ADDRESS; } =20 - hva =3D kvm_vcpu_gfn_to_hva_prot(vcpu, shmem >> PAGE_SHIFT, &writable); - if (kvm_is_error_hva(hva) || !writable) + /* The spec requires the shmem to be 64-byte aligned. */ + if (kvm_vcpu_validate_gpa_range(vcpu, shmem, 64, true)) return SBI_ERR_INVALID_ADDRESS; =20 ret =3D kvm_vcpu_write_guest(vcpu, shmem, &zero_sta, sizeof(zero_sta)); --=20 2.34.1