From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v4 03/28] arm64: hyp-stub: Don't save lr in the EL1 code Date: Tue, 21 Mar 2017 19:20:33 +0000 Message-ID: <20170321192058.9300-4-marc.zyngier@arm.com> References: <20170321192058.9300-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Russell King , Ard Biesheuvel , Catalin Marinas , Keerthy To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Return-path: In-Reply-To: <20170321192058.9300-1-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org The EL2 code is not corrupting lr anymore, so don't bother preserving it in the EL1 trampoline code. Signed-off-by: Marc Zyngier --- arch/arm64/kernel/hyp-stub.S | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S index e4215ad06930..193dfb25ce2f 100644 --- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -116,18 +116,14 @@ ENDPROC(\label) */ ENTRY(__hyp_get_vectors) - str lr, [sp, #-16]! mov x0, #HVC_GET_VECTORS hvc #0 - ldr lr, [sp], #16 ret ENDPROC(__hyp_get_vectors) ENTRY(__hyp_set_vectors) - str lr, [sp, #-16]! mov x1, x0 mov x0, #HVC_SET_VECTORS hvc #0 - ldr lr, [sp], #16 ret ENDPROC(__hyp_set_vectors) -- 2.11.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Tue, 21 Mar 2017 19:20:33 +0000 Subject: [PATCH v4 03/28] arm64: hyp-stub: Don't save lr in the EL1 code In-Reply-To: <20170321192058.9300-1-marc.zyngier@arm.com> References: <20170321192058.9300-1-marc.zyngier@arm.com> Message-ID: <20170321192058.9300-4-marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The EL2 code is not corrupting lr anymore, so don't bother preserving it in the EL1 trampoline code. Signed-off-by: Marc Zyngier --- arch/arm64/kernel/hyp-stub.S | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S index e4215ad06930..193dfb25ce2f 100644 --- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -116,18 +116,14 @@ ENDPROC(\label) */ ENTRY(__hyp_get_vectors) - str lr, [sp, #-16]! mov x0, #HVC_GET_VECTORS hvc #0 - ldr lr, [sp], #16 ret ENDPROC(__hyp_get_vectors) ENTRY(__hyp_set_vectors) - str lr, [sp, #-16]! mov x1, x0 mov x0, #HVC_SET_VECTORS hvc #0 - ldr lr, [sp], #16 ret ENDPROC(__hyp_set_vectors) -- 2.11.0