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[PULL,kvm-unit-tests,15/17] arm: cstart64.S: Downgrade TLBI to non-shareable in asm_mmu_enable

Message ID 20200106100347.1559-16-drjones@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,kvm-unit-tests,01/17] arm: Add missing test name prefix for pl031 and spinlock | expand

Commit Message

Andrew Jones Jan. 6, 2020, 10:03 a.m. UTC 
From: Alexandru Elisei <alexandru.elisei@arm.com>

There's really no need to invalidate the TLB entries for all CPUs when
enabling the MMU for the current CPU, so use the non-shareable version of
the TLBI operation (and downgrade the DSB accordingly).

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 arm/cstart64.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arm/cstart64.S b/arm/cstart64.S
index b0e8baa1a23a..6f49506ca19b 100644
--- a/arm/cstart64.S
+++ b/arm/cstart64.S
@@ -160,8 +160,8 @@  halt:
 .globl asm_mmu_enable
 asm_mmu_enable:
 	ic	iallu			// I+BTB cache invalidate
-	tlbi	vmalle1is		// invalidate I + D TLBs
-	dsb	ish
+	tlbi	vmalle1			// invalidate I + D TLBs
+	dsb	nsh
 
 	/* TCR */
 	ldr	x1, =TCR_TxSZ(VA_BITS) |		\