AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-18 08:56:48 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

iommu/pamu: Fix PAMU boot crash

Browse Source 
Commit 68a17f0be6 introduced an initialization order
problem, where devices are linked against an iommu which is
not yet initialized. Fix it by initializing the iommu-device
before the iommu-ops are registered against the bus.

Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Fixes: 68a17f0be6 ('iommu/pamu: Add support for generic iommu-device')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2017-08-23 16:28:09 +02:00
parent 68a17f0be6
commit 3ff2dcc058
4 changed files with 16 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/iommu/fsl_pamu.c
View File

@ -44,8 +44,6 @@ static struct paace *spaact;
static bool probed; /* Has PAMU been probed? */ static bool probed; /* Has PAMU been probed? */
struct iommu_device pamu_iommu; /* IOMMU core code handle */
/* /*
* Table for matching compatible strings, for device tree * Table for matching compatible strings, for device tree
* guts node, for QorIQ SOCs. * guts node, for QorIQ SOCs.
@ -1156,18 +1154,6 @@ static int fsl_pamu_probe(struct platform_device *pdev)
if (ret) if (ret)
goto error_genpool; goto error_genpool;
ret = iommu_device_sysfs_add(&pamu_iommu, dev, NULL, "iommu0");
if (ret)
goto error_genpool;
iommu_device_set_ops(&pamu_iommu, &fsl_pamu_ops);
ret = iommu_device_register(&pamu_iommu);
if (ret) {
dev_err(dev, "Can't register iommu device\n");
goto error_sysfs;
}
pamubypenr = in_be32(&guts_regs->pamubypenr); pamubypenr = in_be32(&guts_regs->pamubypenr);
for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size; for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size;
@ -1195,9 +1181,6 @@ static int fsl_pamu_probe(struct platform_device *pdev)
return 0; return 0;
error_sysfs:
iommu_device_sysfs_remove(&pamu_iommu);
error_genpool: error_genpool:
gen_pool_destroy(spaace_pool); gen_pool_destroy(spaace_pool);

3
drivers/iommu/fsl_pamu.h
View File

@ -391,9 +391,6 @@ struct ome {
#define EOE_WWSAOL 0x1e /* Write with stash allocate only and lock */ #define EOE_WWSAOL 0x1e /* Write with stash allocate only and lock */
#define EOE_VALID 0x80 #define EOE_VALID 0x80
extern const struct iommu_ops fsl_pamu_ops;
extern struct iommu_device pamu_iommu; /* IOMMU core code handle */
/* Function prototypes */ /* Function prototypes */
int pamu_domain_init(void); int pamu_domain_init(void);
int pamu_enable_liodn(int liodn); int pamu_enable_liodn(int liodn);

17
drivers/iommu/fsl_pamu_domain.c
View File

@ -33,6 +33,8 @@ static struct kmem_cache *fsl_pamu_domain_cache;
static struct kmem_cache *iommu_devinfo_cache; static struct kmem_cache *iommu_devinfo_cache;
static DEFINE_SPINLOCK(device_domain_lock); static DEFINE_SPINLOCK(device_domain_lock);
struct iommu_device pamu_iommu; /* IOMMU core code handle */
static struct fsl_dma_domain *to_fsl_dma_domain(struct iommu_domain *dom) static struct fsl_dma_domain *to_fsl_dma_domain(struct iommu_domain *dom)
{ {
return container_of(dom, struct fsl_dma_domain, iommu_domain); return container_of(dom, struct fsl_dma_domain, iommu_domain);
@ -1050,7 +1052,7 @@ static u32 fsl_pamu_get_windows(struct iommu_domain *domain)
return dma_domain->win_cnt; return dma_domain->win_cnt;
} }
const struct iommu_ops fsl_pamu_ops = { static const struct iommu_ops fsl_pamu_ops = {
.capable = fsl_pamu_capable, .capable = fsl_pamu_capable,
.domain_alloc = fsl_pamu_domain_alloc, .domain_alloc = fsl_pamu_domain_alloc,
.domain_free = fsl_pamu_domain_free, .domain_free = fsl_pamu_domain_free,
@ -1076,6 +1078,19 @@ int __init pamu_domain_init(void)
if (ret) if (ret)
return ret; return ret;
ret = iommu_device_sysfs_add(&pamu_iommu, NULL, NULL, "iommu0");
if (ret)
return ret;
iommu_device_set_ops(&pamu_iommu, &fsl_pamu_ops);
ret = iommu_device_register(&pamu_iommu);
if (ret) {
iommu_device_sysfs_remove(&pamu_iommu);
pr_err("Can't register iommu device\n");
return ret;
}
bus_set_iommu(&platform_bus_type, &fsl_pamu_ops); bus_set_iommu(&platform_bus_type, &fsl_pamu_ops);
bus_set_iommu(&pci_bus_type, &fsl_pamu_ops); bus_set_iommu(&pci_bus_type, &fsl_pamu_ops);

2
drivers/iommu/fsl_pamu_domain.h
View File

@ -21,8 +21,6 @@
#include "fsl_pamu.h" #include "fsl_pamu.h"
const struct iommu_ops fsl_pamu_ops;
struct dma_window { struct dma_window {
phys_addr_t paddr; phys_addr_t paddr;
u64 size; u64 size;