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[34.168.149.56]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ccc9bdb72fsm1425915ad.6.2026.07.06.15.47.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 15:47:18 -0700 (PDT) Date: Mon, 6 Jul 2026 22:47:15 +0000 From: David Matlack To: Narayana Murty N Cc: alex@shazbot.org, shuah@kernel.org, amastro@fb.com, rananta@google.com, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, vaibhav@linux.ibm.com, sbhat@linux.ibm.com, harshpb@linux.ibm.com Subject: Re: [RFC PATCH 5/6] selftests/vfio: Accept sPAPR errno for DMA range overflow Message-ID: References: <20260703032806.40946-1-nnmlinux@linux.ibm.com> <20260703032806.40946-6-nnmlinux@linux.ibm.com> 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=us-ascii Content-Disposition: inline In-Reply-To: <20260703032806.40946-6-nnmlinux@linux.ibm.com> On 2026-07-02 11:28 PM, Narayana Murty N wrote: > Accept sPAPR errno for DMA range overflow > > The DMA map limit test expects an overflowing IOVA range to fail with > -EOVERFLOW. That matches the Type1 and iommufd paths. > > On sPAPR TCE v2, the same invalid range is rejected as outside the active > TCE window and currently returns -ENXIO. Treat that as the expected ppc > result for this RFC while keeping the existing -EOVERFLOW expectation for > other backends. > > This keeps the overflow test enabled for sPAPR TCE v2 instead of skipping > it. > > Signed-off-by: Narayana Murty N > --- > tools/testing/selftests/vfio/vfio_dma_mapping_test.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c > index 4411fdbd56da..cd2d3276a46c 100644 > --- a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c > +++ b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c > @@ -316,10 +316,18 @@ TEST_F(vfio_dma_map_limit_test, overflow) > region->size = self->mmap_size; > > rc = __iommu_map(self->iommu, region); > +#ifdef __powerpc__ > + ASSERT_EQ(rc, -ENXIO); > +#else > ASSERT_EQ(rc, -EOVERFLOW); > +#endif This should be based on the IOMMU mode, not __powerpc__, as that is what actually determines what gets returned.