Re: [PATCH 11/15] arm64: Cleanup VTCR_EL2 computation
From: Suzuki K. Poulose
Date: Wed Oct 07 2015 - 06:23:14 EST
On 07/10/15 11:11, Marc Zyngier wrote:
On 15/09/15 16:41, Suzuki K. Poulose wrote:
From: "Suzuki K. Poulose" <suzuki.poulose@xxxxxxx>
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index bdf139e..699554d 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -138,6 +138,9 @@
* The magic numbers used for VTTBR_X in this patch can be found in Tables
* D4-23 and D4-25 in ARM DDI 0487A.b.
*/
+#define VTCR_EL2_COMMON_BITS (VTCR_EL2_SH0_INNER | VTCR_EL2_ORGN0_WBWA | \
+ VTCR_EL2_IRGN0_WBWA | VTCR_EL2_T0SZ_40B)
+
#ifdef CONFIG_ARM64_64K_PAGES
/*
* Stage2 translation configuration:
@@ -145,9 +148,8 @@
* 64kB pages (TG0 = 1)
* 2 level page tables (SL = 1)
*/
-#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \
- VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
- VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B)
+#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SL0_LVL1 | \
+ VTCR_EL2_COMMON_BITS)
#define VTTBR_X (38 - VTCR_EL2_T0SZ_40B)
#else
/*
@@ -156,9 +158,8 @@
* 4kB pages (TG0 = 0)
* 3 level page tables (SL = 1)
*/
-#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \
- VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
- VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B)
+#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SL0_LVL1 | \
+ VTCR_EL2_COMMON_BITS)
#define VTTBR_X (37 - VTCR_EL2_T0SZ_40B)
#endif
This looks OK, but is going to clash badly with 857d1a9 ("arm64: KVM:
set {v,}TCR_EL2 RES1 bits"). Nothing we can't fix though.
As discussed, I will rebase my series on top of 4.3-rc4 to avoid this.
Thanks
Suzuki
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