diff options
Diffstat (limited to 'arch/x86/cpu/mtrr.c')
| -rw-r--r-- | arch/x86/cpu/mtrr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/cpu/mtrr.c b/arch/x86/cpu/mtrr.c index 14c644eb56..260a008093 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; @@ -179,6 +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++]; @@ -223,6 +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; |