From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baoquan He Subject: [Patch v4 4/9] iommu/amd: add early_enable_iommu() helper function Date: Wed, 25 May 2016 14:28:50 +0800 Message-ID: <1464157735-8865-5-git-send-email-bhe@redhat.com> References: <1464157735-8865-1-git-send-email-bhe@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1464157735-8865-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, vincent.wan-5C7GfCeVMHo@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: iommu@lists.linux-foundation.org From: Baoquan HE This can make later kdump change easier. Signed-off-by: Baoquan He --- drivers/iommu/amd_iommu_init.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 9e1dfcb..9c1aa54 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1673,6 +1673,18 @@ static void iommu_apply_resume_quirks(struct amd_iommu *iommu) iommu->stored_addr_lo | 1); } +static void early_enable_iommu(struct amd_iommu *iommu) +{ + iommu_disable(iommu); + iommu_init_flags(iommu); + iommu_set_device_table(iommu); + iommu_enable_command_buffer(iommu); + iommu_enable_event_buffer(iommu); + iommu_set_exclusion_range(iommu); + iommu_enable(iommu); + iommu_flush_all_caches(iommu); +} + /* * This function finally enables all IOMMUs found in the system after * they have been initialized @@ -1681,16 +1693,8 @@ static void early_enable_iommus(void) { struct amd_iommu *iommu; - for_each_iommu(iommu) { - iommu_disable(iommu); - iommu_init_flags(iommu); - iommu_set_device_table(iommu); - iommu_enable_command_buffer(iommu); - iommu_enable_event_buffer(iommu); - iommu_set_exclusion_range(iommu); - iommu_enable(iommu); - iommu_flush_all_caches(iommu); - } + for_each_iommu(iommu) + early_enable_iommu(iommu); } static void enable_iommus_v2(void) -- 2.5.5