From: Borislav Petkov <[email protected]> This way we can pass pat MSR value directly.
No functionality change. Signed-off-by: Borislav Petkov <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: [email protected] Cc: [email protected] Cc: linux-mm <[email protected]> Cc: [email protected] Cc: Luis R. Rodriguez <[email protected]> Cc: [email protected] Cc: Thomas Gleixner <[email protected]> Cc: Toshi Kani <[email protected]> Cc: x86-ml <[email protected]> Cc: [email protected] --- arch/x86/mm/pat.c | 39 ++++++++++++++++----------------------- 1 file changed, 16 insertions(+), 23 deletions(-) diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 476d0780560f..4d28759f5a1a 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -172,32 +172,14 @@ static enum page_cache_mode pat_get_cache_mode(unsigned pat_val, char *msg) #undef CM -/* - * Update the cache mode to pgprot translation tables according to PAT - * configuration. - * Using lower indices is preferred, so we start with highest index. - */ -void pat_init_cache_modes(void) -{ - int i; - enum page_cache_mode cache; - char pat_msg[33]; - u64 pat; - - rdmsrl(MSR_IA32_CR_PAT, pat); - pat_msg[32] = 0; - for (i = 7; i >= 0; i--) { - cache = pat_get_cache_mode((pat >> (i * 8)) & 7, - pat_msg + 4 * i); - update_cache_mode_entry(i, cache); - } - pr_info("x86/PAT: Configuration [0-7]: %s\n", pat_msg); -} - #define PAT(x, y) ((u64)PAT_ ## y << ((x)*8)) static void pat_bsp_init(u64 pat) { + enum page_cache_mode cache; + char pat_msg[33]; + int i; + if (!cpu_has_pat) { pat_disable("PAT not supported by CPU."); return; @@ -211,7 +193,18 @@ static void pat_bsp_init(u64 pat) wrmsrl(MSR_IA32_CR_PAT, pat); - pat_init_cache_modes(); + pat_msg[32] = 0; + + /* + * Update the cache mode to pgprot translation tables according to PAT + * configuration. Using lower indices is preferred, so we start with + * highest index. + */ + for (i = 7; i >= 0; i--) { + cache = pat_get_cache_mode((pat >> (i * 8)) & 7, pat_msg + 4 * i); + update_cache_mode_entry(i, cache); + } + pr_info("x86/PAT: Configuration [0-7]: %s\n", pat_msg); } static void pat_ap_init(u64 pat) -- 2.3.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
