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[04/18] arm64: fixup: use id_aa64mmfr0_el1 to set tcr

Message ID 1422815686-24591-5-git-send-email-drjones@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andrew Jones Feb. 1, 2015, 6:34 p.m. UTC 
We shouldn't assume we can set tcr_el1.ips to 42 bits. Set
it based on what we read from id_aa64mmfr0_el1. Didn't see
a problem, but might as well be correct.

Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 arm/cstart64.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arm/cstart64.S b/arm/cstart64.S
index 5151f4c77d745..9047e7ef14646 100644
--- a/arm/cstart64.S
+++ b/arm/cstart64.S
@@ -92,7 +92,7 @@  asm_mmu_enable:
 		     TCR_TG0_64K | TCR_TG1_64K |	\
 		     TCR_IRGN_WBWA | TCR_ORGN_WBWA |	\
 		     TCR_SHARED
-	mov	x2, #3			// 011 is 42 bits
+	mrs	x2, id_aa64mmfr0_el1
 	bfi	x1, x2, #32, #3
 	msr	tcr_el1, x1