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Subject[PATCH] x86, tboot: iomem fixes
Date
Fixes for iomem annotations in arch/x86/kernel/tboot.c

Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
---
arch/x86/kernel/tboot.c | 43 +++++++++++--------------------------------
1 file changed, 11 insertions(+), 32 deletions(-)

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 3ff42d2..d06574c 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -442,33 +442,12 @@ late_initcall(tboot_late_init);
#define TXTCR_HEAP_BASE 0x0300
#define TXTCR_HEAP_SIZE 0x0308

-#define SHA1_SIZE 20
-
-struct sha1_hash {
- u8 hash[SHA1_SIZE];
-};
-
-struct sinit_mle_data {
- u32 version; /* currently 6 */
- struct sha1_hash bios_acm_id;
- u32 edx_senter_flags;
- u64 mseg_valid;
- struct sha1_hash sinit_hash;
- struct sha1_hash mle_hash;
- struct sha1_hash stm_hash;
- struct sha1_hash lcp_policy_hash;
- u32 lcp_policy_control;
- u32 rlp_wakeup_addr;
- u32 reserved;
- u32 num_mdrs;
- u32 mdrs_off;
- u32 num_vtd_dmars;
- u32 vtd_dmars_off;
-} __packed;
+#define SINIT_MLE_DATA_VTD_DMAR_OFF 140

struct acpi_table_header *tboot_get_dmar_table(struct acpi_table_header *dmar_tbl)
{
- void *heap_base, *heap_ptr, *config;
+ void __iomem *heap_base, *heap_ptr, *config;
+ u32 dmar_tbl_off;

if (!tboot_enabled())
return dmar_tbl;
@@ -485,25 +464,25 @@ struct acpi_table_header *tboot_get_dmar_table(struct acpi_table_header *dmar_tb
return NULL;

/* now map TXT heap */
- heap_base = ioremap(*(u64 *)(config + TXTCR_HEAP_BASE),
- *(u64 *)(config + TXTCR_HEAP_SIZE));
+ heap_base = ioremap(readl(config + TXTCR_HEAP_BASE),
+ readl(config + TXTCR_HEAP_SIZE));
iounmap(config);
if (!heap_base)
return NULL;

/* walk heap to SinitMleData */
/* skip BiosData */
- heap_ptr = heap_base + *(u64 *)heap_base;
+ heap_ptr = heap_base + readq(heap_base);
/* skip OsMleData */
- heap_ptr += *(u64 *)heap_ptr;
+ heap_ptr += readq(heap_ptr);
/* skip OsSinitData */
- heap_ptr += *(u64 *)heap_ptr;
+ heap_ptr += readq(heap_ptr);
/* now points to SinitMleDataSize; set to SinitMleData */
heap_ptr += sizeof(u64);
/* get addr of DMAR table */
- dmar_tbl = (struct acpi_table_header *)(heap_ptr +
- ((struct sinit_mle_data *)heap_ptr)->vtd_dmars_off -
- sizeof(u64));
+ dmar_tbl_off = readl(heap_ptr + SINIT_MLE_DATA_VTD_DMAR_OFF);
+ memcpy_fromio(dmar_tbl, heap_ptr + dmar_tbl_off - sizeof(u64),
+ sizeof(struct acpi_table_header));

/* don't unmap heap because dmar.c needs access to this */

--
1.7.9.5


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