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authorKees Cook <kees+treewide@kernel.org>2026-09-02 15:31:14 -0700
committerKees Cook <kees@kernel.org>2026-09-04 21:37:00 -0700
commit3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d (patch)
treec65086f9bdcd48c6360fb7cb4598bca084da1f32 /drivers/iommu/amd/quirks.c
downloadlinux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.tar.gz
linux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.zip
treewide: refresh kmalloc_obj() conversionsgrafted
This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook <kees+treewide@kernel.org>
Diffstat (limited to 'drivers/iommu/amd/quirks.c')
-rw-r--r--drivers/iommu/amd/quirks.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/iommu/amd/quirks.c b/drivers/iommu/amd/quirks.c
new file mode 100644
index 000000000..79dbb8f33
--- /dev/null
+++ b/drivers/iommu/amd/quirks.c
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Quirks for AMD IOMMU
+ *
+ * Copyright (C) 2019 Kai-Heng Feng <kai.heng.feng@canonical.com>
+ */
+
+#ifdef CONFIG_DMI
+#include <linux/dmi.h>
+
+#include "amd_iommu.h"
+
+#define IVHD_SPECIAL_IOAPIC 1
+
+struct ivrs_quirk_entry {
+ u8 id;
+ u32 devid;
+};
+
+enum {
+ DELL_INSPIRON_7375 = 0,
+ DELL_LATITUDE_5495,
+ LENOVO_IDEAPAD_330S_15ARR,
+};
+
+static const struct ivrs_quirk_entry ivrs_ioapic_quirks[][3] __initconst = {
+ /* ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 */
+ [DELL_INSPIRON_7375] = {
+ { .id = 4, .devid = 0xa0 },
+ { .id = 5, .devid = 0x2 },
+ {}
+ },
+ /* ivrs_ioapic[4]=00:14.0 */
+ [DELL_LATITUDE_5495] = {
+ { .id = 4, .devid = 0xa0 },
+ {}
+ },
+ /* ivrs_ioapic[32]=00:14.0 */
+ [LENOVO_IDEAPAD_330S_15ARR] = {
+ { .id = 32, .devid = 0xa0 },
+ {}
+ },
+ {}
+};
+
+static int __init ivrs_ioapic_quirk_cb(const struct dmi_system_id *d)
+{
+ const struct ivrs_quirk_entry *i;
+
+ for (i = d->driver_data; i->id != 0 && i->devid != 0; i++)
+ add_special_device(IVHD_SPECIAL_IOAPIC, i->id, (u32 *)&i->devid, 0);
+
+ return 0;
+}
+
+static const struct dmi_system_id ivrs_quirks[] __initconst = {
+ {
+ .callback = ivrs_ioapic_quirk_cb,
+ .ident = "Dell Inspiron 7375",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7375"),
+ },
+ .driver_data = (void *)&ivrs_ioapic_quirks[DELL_INSPIRON_7375],
+ },
+ {
+ .callback = ivrs_ioapic_quirk_cb,
+ .ident = "Dell Latitude 5495",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 5495"),
+ },
+ .driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
+ },
+ {
+ /*
+ * Acer Aspire A315-41 requires the very same workaround as
+ * Dell Latitude 5495
+ */
+ .callback = ivrs_ioapic_quirk_cb,
+ .ident = "Acer Aspire A315-41",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A315-41"),
+ },
+ .driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
+ },
+ {
+ .callback = ivrs_ioapic_quirk_cb,
+ .ident = "Lenovo ideapad 330S-15ARR",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "81FB"),
+ },
+ .driver_data = (void *)&ivrs_ioapic_quirks[LENOVO_IDEAPAD_330S_15ARR],
+ },
+ {}
+};
+
+void __init amd_iommu_apply_ivrs_quirks(void)
+{
+ dmi_check_system(ivrs_quirks);
+}
+#endif