| Message ID | 20170127212845.27618.32169.stgit@taos (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Herbert Xu |
| Headers | show |
On 01/27/2017 03:28 PM, Gary R Hook wrote: > An I/O page fault occurs when the IOMMU is enabled on a > system that supports the v5 CCP. DMA operations use a > Request ID value that does not match what is expected by > the IOMMU, resulting in the I/O page fault. Setting the > Request ID value to 0 corrects this issue. Herbert, Hoping to get some 4.10 love on this patch, plus one other. Do we see a possibility at this late date? > > Signed-off-by: Gary R Hook <gary.hook@amd.com> > --- > drivers/crypto/ccp/ccp-dev-v5.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c > index e2ce819..612898b 100644 > --- a/drivers/crypto/ccp/ccp-dev-v5.c > +++ b/drivers/crypto/ccp/ccp-dev-v5.c > @@ -959,7 +959,7 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data) > static void ccp5_config(struct ccp_device *ccp) > { > /* Public side */ > - iowrite32(0x00001249, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET); > + iowrite32(0x0, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET); > } > > static void ccp5other_config(struct ccp_device *ccp) > > -- > To unsubscribe from this list: send the line "unsubscribe linux-crypto" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
On Fri, Jan 27, 2017 at 03:28:45PM -0600, Gary R Hook wrote: > An I/O page fault occurs when the IOMMU is enabled on a > system that supports the v5 CCP. DMA operations use a > Request ID value that does not match what is expected by > the IOMMU, resulting in the I/O page fault. Setting the > Request ID value to 0 corrects this issue. > > Signed-off-by: Gary R Hook <gary.hook@amd.com> Patch applied. Thanks.
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c index e2ce819..612898b 100644 --- a/drivers/crypto/ccp/ccp-dev-v5.c +++ b/drivers/crypto/ccp/ccp-dev-v5.c @@ -959,7 +959,7 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data) static void ccp5_config(struct ccp_device *ccp) { /* Public side */ - iowrite32(0x00001249, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET); + iowrite32(0x0, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET); } static void ccp5other_config(struct ccp_device *ccp)
An I/O page fault occurs when the IOMMU is enabled on a system that supports the v5 CCP. DMA operations use a Request ID value that does not match what is expected by the IOMMU, resulting in the I/O page fault. Setting the Request ID value to 0 corrects this issue. Signed-off-by: Gary R Hook <gary.hook@amd.com> --- drivers/crypto/ccp/ccp-dev-v5.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html