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From: Alexandru Elisei <alexandru.elisei@arm.com>
To: kvm@vger.kernel.org
Cc: pbonzini@redhat.com, rkrcmar@redhat.com, drjones@redhat.com,
	maz@kernel.org, andre.przywara@arm.com, vladimir.murzin@arm.com,
	mark.rutland@arm.com
Subject: [kvm-unit-tests PATCH v2 16/18] arm: cstart64.S: Downgrade TLBI to non-shareable in asm_mmu_enable
Date: Thu, 28 Nov 2019 18:04:16 +0000	[thread overview]
Message-ID: <20191128180418.6938-17-alexandru.elisei@arm.com> (raw)
In-Reply-To: <20191128180418.6938-1-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>
---
 arm/cstart64.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arm/cstart64.S b/arm/cstart64.S
index f41ffa3bc6c2..87bf873795a1 100644
--- a/arm/cstart64.S
+++ b/arm/cstart64.S
@@ -167,8 +167,8 @@ 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) |		\
-- 
2.20.1


  parent reply	other threads:[~2019-11-28 18:04 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28 18:04 [kvm-unit-tests PATCH v2 00/18] arm/arm64: Various fixes Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 01/18] lib: arm/arm64: Remove unnecessary dcache maintenance operations Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 02/18] lib: arm64: Remove barriers before TLB operations Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 03/18] lib: Add WRITE_ONCE and READ_ONCE implementations in compiler.h Alexandru Elisei
2019-12-09 14:21   ` Thomas Huth
2019-12-16 10:15     ` Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 04/18] lib: arm/arm64: Use WRITE_ONCE to update the translation tables Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 05/18] lib: arm/arm64: Remove unused CPU_OFF parameter Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 06/18] arm/arm64: psci: Don't run C code without stack or vectors Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 07/18] lib: arm/arm64: Add missing include for alloc_page.h in pgtable.h Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 08/18] lib: arm: Implement flush_tlb_all Alexandru Elisei
2019-11-28 23:24   ` André Przywara
2019-12-30  8:50     ` Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 09/18] lib: arm/arm64: Teach mmu_clear_user about block mappings Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 10/18] arm/arm64: selftest: Add prefetch abort test Alexandru Elisei
2019-12-13 18:04   ` Andrew Jones
2019-12-30  9:19     ` Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 11/18] arm64: timer: Write to ICENABLER to disable timer IRQ Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 12/18] arm64: timer: EOIR the interrupt after masking the timer Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 13/18] arm64: timer: Test behavior when timer disabled or masked Alexandru Elisei
2019-12-13 18:28   ` Andrew Jones
2019-12-30  9:21     ` Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 14/18] lib: arm/arm64: Refuse to disable the MMU with non-identity stack pointer Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 15/18] arm/arm64: Perform dcache clean + invalidate after turning MMU off Alexandru Elisei
2019-12-13 18:42   ` Andrew Jones
2019-12-30  9:29     ` Alexandru Elisei
2019-11-28 18:04 ` Alexandru Elisei [this message]
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 17/18] arm/arm64: Invalidate TLB before enabling MMU Alexandru Elisei
2019-11-28 18:04 ` [kvm-unit-tests PATCH v2 18/18] arm: cstart64.S: Remove icache invalidation from asm_mmu_enable Alexandru Elisei
2019-12-13 18:51 ` [kvm-unit-tests PATCH v2 00/18] arm/arm64: Various fixes Andrew Jones

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