x86: mtrr: Use MP calls to list the MTRRs

Update the mtrr command to use mp_run_on_cpus() to obtain its information.
Since the selected CPU is the boot CPU this does not change the result,
but it sets the stage for supporting other CPUs.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/x86/cpu/mtrr.c b/arch/x86/cpu/mtrr.c
index 7ec0733337..c9b4e7d06e 100644
--- a/arch/x86/cpu/mtrr.c
+++ b/arch/x86/cpu/mtrr.c
@@ -21,6 +21,7 @@
 #include <log.h>
 #include <asm/cache.h>
 #include <asm/io.h>
+#include <asm/mp.h>
 #include <asm/msr.h>
 #include <asm/mtrr.h>
 
@@ -63,6 +64,16 @@ static void set_var_mtrr(uint reg, uint type, uint64_t start, uint64_t size)
 	wrmsrl(MTRR_PHYS_MASK_MSR(reg), mask | MTRR_PHYS_MASK_VALID);
 }
 
+void mtrr_read_all(struct mtrr_info *info)
+{
+	int i;
+
+	for (i = 0; i < MTRR_COUNT; i++) {
+		info->mtrr[i].base = native_read_msr(MTRR_PHYS_BASE_MSR(i));
+		info->mtrr[i].mask = native_read_msr(MTRR_PHYS_MASK_MSR(i));
+	}
+}
+
 int mtrr_commit(bool do_caches)
 {
 	struct mtrr_request *req = gd->arch.mtrr_req;