tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: drivers: iommu: pviommu: Add selftest

Browse Source 
Add a simple self test which only tests mappings tracking in the
driver.

Bug: 357781595
Bug: 348382247
Bug: 236685427
Change-Id: Ib27b9dccdf609067508d07e178d0e7fe95d56306
Signed-off-by: Mostafa Saleh <smostafa@google.com>
This commit is contained in:
Mostafa Saleh
2023-11-24 11:02:09 +00:00
committed by Carlos Llamas
parent 8561efaa1b
commit e516a71a45
2 changed files with 54 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/iommu/Kconfig
+6
View File
@@ -537,4 +537,10 @@ config PKVM_PVIOMMU
Say Y here if you intend to run this kernel as a guest.
config PKVM_PVIOMMU_SELFTEST
bool "pKVM pvIOMMU selftest"
depends on PKVM_PVIOMMU
help
Basic test for PKVM_PVIOMMU
endif # IOMMU_SUPPORT
drivers/iommu/pkvm-pviommu.c
+48
View File
@@ -11,6 +11,15 @@
#include <linux/platform_device.h>
#include <linux/xarray.h>
#define ASSERT(cond) \
do { \
if (!(cond)) { \
pr_err("line %d: assertion failed: %s\n", \
__LINE__, #cond); \
return -1; \
} \
} while (0)
static DEFINE_XARRAY(pviommu_groups);
struct pviommu_domain {
@@ -447,6 +456,45 @@ static struct platform_driver pkvm_pviommu_driver = {
},
};
#if IS_ENABLED(CONFIG_PKVM_PVIOMMU_SELFTEST) && !defined(MODULE)
/* Mainly test iova_to_phys and not hypervisor interface. */
int __init __pviommu_selftest(void)
{
struct pviommu_domain domain;
pr_info("pviommu selftest starting\n");
mt_init(&domain.mappings);
pviommu_domain_insert_map(&domain, 0x10000, 0xFEFFF, 0xE0000, GFP_KERNEL);
pviommu_domain_insert_map(&domain, 0xFFF0000, 0x1EDBFFFF, 0xDEAD0000, GFP_KERNEL);
ASSERT(pviommu_domain_find(&domain, 0x10000) == 0xE0000);
ASSERT(pviommu_domain_find(&domain, 0x10F00) == 0xE0F00);
ASSERT(pviommu_domain_find(&domain, 0x1EDBFFFF) == 0xED89FFFF);
ASSERT(pviommu_domain_find(&domain, 0x10000000) == 0xDEAE0000);
ASSERT(pviommu_domain_find(&domain, 0x1FF000) == 0);
pviommu_domain_remove_map(&domain, 0x12000, 0x19FFF);
ASSERT(pviommu_domain_find(&domain, 0x11000) == 0xE1000);
ASSERT(pviommu_domain_find(&domain, 0x1B000) == 0xEB000);
ASSERT(pviommu_domain_find(&domain, 0x14000) == 0);
pviommu_domain_insert_map(&domain, 0xC00000, 0xCFFFFF, 0xABCD000, GFP_KERNEL);
pviommu_domain_insert_map(&domain, 0xD00000, 0xDFFFFF, 0x1000, GFP_KERNEL);
pviommu_domain_insert_map(&domain, 0xE00000, 0xEFFFFF, 0xC0FE00000, GFP_KERNEL);
ASSERT(pviommu_domain_find(&domain, 0xD00000) == 0x1000);
pviommu_domain_remove_map(&domain, 0xC50000, 0xE5FFFF);
ASSERT(pviommu_domain_find(&domain, 0xC50000) == 0);
ASSERT(pviommu_domain_find(&domain, 0xD10000) == 0);
ASSERT(pviommu_domain_find(&domain, 0xE60000) == 0xC0FE60000);
ASSERT(pviommu_domain_find(&domain, 0xC10000) == 0xABDD000);
mtree_destroy(&domain.mappings);
return 0;
}
subsys_initcall(__pviommu_selftest);
#endif
module_platform_driver(pkvm_pviommu_driver);
MODULE_DESCRIPTION("IOMMU API for pKVM paravirtualized IOMMU");