linux-kernel - [PATCH v7 09/24] iommu/amd: Expose [set|get]_dev_entry

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Date:   Wed,  1 Mar 2023 15:47:38 -0800
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Tony Luck <tony.luck@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Len Brown <len.brown@...el.com>
Cc:     Andi Kleen <ak@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ricardo Neri <ricardo.neri@...el.com>,
        linuxppc-dev@...ts.ozlabs.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: [PATCH v7 09/24] iommu/amd: Expose [set|get]_dev_entry_bit()

If an interrupt is allocated with NMI as delivery mode, the Device Table
Entry needs to be modified accordingly in irq_remapping_alloc().

No functional changes.

Cc: Andi Kleen <ak@...ux.intel.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@...el.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: iommu@...ts.linux-foundation.org
Cc: linuxppc-dev@...ts.ozlabs.org
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
Changes since v6:
 * None

Changes since v5:
 * Introduced this patch

Changes since v4:
 * N/A

Changes since v3:
 * N/A

Changes since v2:
 * N/A

Changes since v1:
 * N/A
---
 drivers/iommu/amd/amd_iommu.h | 3 +++
 drivers/iommu/amd/init.c      | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h
index c160a332ce33..b9b87a8cd48e 100644
--- a/drivers/iommu/amd/amd_iommu.h
+++ b/drivers/iommu/amd/amd_iommu.h
@@ -141,4 +141,7 @@ extern u64 amd_iommu_efr;
 extern u64 amd_iommu_efr2;
 
 extern bool amd_iommu_snp_en;
+
+extern void set_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit);
+extern int get_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit);
 #endif
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 19a46b9f7357..559a9ecb785f 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -999,7 +999,7 @@ static void __set_dev_entry_bit(struct dev_table_entry *dev_table,
 	dev_table[devid].data[i] |= (1UL << _bit);
 }
 
-static void set_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit)
+void set_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit)
 {
 	struct dev_table_entry *dev_table = get_dev_table(iommu);
 
@@ -1015,7 +1015,7 @@ static int __get_dev_entry_bit(struct dev_table_entry *dev_table,
 	return (dev_table[devid].data[i] & (1UL << _bit)) >> _bit;
 }
 
-static int get_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit)
+int get_dev_entry_bit(struct amd_iommu *iommu, u16 devid, u8 bit)
 {
 	struct dev_table_entry *dev_table = get_dev_table(iommu);
 
-- 
2.25.1