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platform/x86/intel/tpmi: Check major version change for TPMI Information

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Check the major version from TPMI information header and fail to load
driver if the version is not supported.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240423204619.3946901-3-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2024-04-23 13:46:11 -07:00 committed by Hans de Goede
parent 2920141fc1
commit 59eb0814d6
1 changed files with 13 additions and 4 deletions
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17
drivers/platform/x86/intel/tpmi.c
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@ -666,28 +666,37 @@ static int tpmi_create_devices(struct intel_tpmi_info *tpmi_info)
}
#define TPMI_INFO_BUS_INFO_OFFSET 0x08
#define TPMI_INFO_MAJOR_VERSION 0x00
static int tpmi_process_info(struct intel_tpmi_info *tpmi_info,
struct intel_tpmi_pm_feature *pfs)
{
struct tpmi_info_header header;
void __iomem *info_mem;
u64 feature_header;
int ret = 0;
info_mem = ioremap(pfs->vsec_offset + TPMI_INFO_BUS_INFO_OFFSET,
pfs->pfs_header.entry_size * sizeof(u32) - TPMI_INFO_BUS_INFO_OFFSET);
info_mem = ioremap(pfs->vsec_offset, pfs->pfs_header.entry_size * sizeof(u32));
if (!info_mem)
return -ENOMEM;
memcpy_fromio(&header, info_mem, sizeof(header));
feature_header = readq(info_mem);
if (TPMI_MAJOR_VERSION(feature_header) != TPMI_INFO_MAJOR_VERSION) {
ret = -ENODEV;
goto error_info_header;
}
memcpy_fromio(&header, info_mem + TPMI_INFO_BUS_INFO_OFFSET, sizeof(header));
tpmi_info->plat_info.package_id = header.pkg;
tpmi_info->plat_info.bus_number = header.bus;
tpmi_info->plat_info.device_number = header.dev;
tpmi_info->plat_info.function_number = header.fn;
error_info_header:
iounmap(info_mem);
return 0;
return ret;
}
static int tpmi_fetch_pfs_header(struct intel_tpmi_pm_feature *pfs, u64 start, int size)