diff options
Diffstat (limited to 'arch/x86/cpu/mtrr.c')
| -rw-r--r-- | arch/x86/cpu/mtrr.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/cpu/mtrr.c b/arch/x86/cpu/mtrr.c index 166aff380c6..260a0080930 100644 --- a/arch/x86/cpu/mtrr.c +++ b/arch/x86/cpu/mtrr.c @@ -26,6 +26,7 @@ #include <asm/mp.h> #include <asm/msr.h> #include <asm/mtrr.h> +#include <linux/log2.h> DECLARE_GLOBAL_DATA_PTR; @@ -155,12 +156,8 @@ int mtrr_commit(bool do_caches) debug("open done\n"); qsort(req, gd->arch.mtrr_req_count, sizeof(*req), h_comp_mtrr); for (i = 0; i < gd->arch.mtrr_req_count; i++, req++) - set_var_mtrr(i, req->type, req->start, req->size); + mtrr_set_next_var(req->type, req->start, req->size); - /* Clear the ones that are unused */ - debug("clear\n"); - for (; i < mtrr_get_var_count(); i++) - wrmsrl(MTRR_PHYS_MASK_MSR(i), 0); debug("close\n"); mtrr_close(&state, do_caches); debug("mtrr done\n"); @@ -183,6 +180,9 @@ int mtrr_add_request(int type, uint64_t start, uint64_t size) if (!gd->arch.has_mtrr) return -ENOSYS; + if (!is_power_of_2(size)) + return -EINVAL; + if (gd->arch.mtrr_req_count == MAX_MTRR_REQUESTS) return -ENOSPC; req = &gd->arch.mtrr_req[gd->arch.mtrr_req_count++]; @@ -227,6 +227,9 @@ int mtrr_set_next_var(uint type, uint64_t start, uint64_t size) { int mtrr; + if (!is_power_of_2(size)) + return -EINVAL; + mtrr = get_free_var_mtrr(); if (mtrr < 0) return mtrr; |