leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm: spectre-v2: use arm_smccc_1_1_get_conduit()

Browse Source 
Now that we have arm_smccc_1_1_get_conduit(), we can hide the PSCI
implementation details from the arm spectre-v2 code, so let's do so.

As arm_smccc_1_1_get_conduit() implicitly checks that the SMCCC version
is at least SMCCC_VERSION_1_1, we no longer need to check this
explicitly where switch statements have a default case.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Rutland 2019-08-09 14:22:42 +01:00 committed by Catalin Marinas
parent c98bd29917
commit 6848253dde
1 changed files with 3 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/mm/proc-v7-bugs.c
View File

@ -1,7 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/arm-smccc.h>
#include <linux/kernel.h>
#include <linux/psci.h>
#include <linux/smp.h>
#include <asm/cp15.h>
@ -75,11 +74,8 @@ static void cpu_v7_spectre_init(void)
case ARM_CPU_PART_CORTEX_A72: {
struct arm_smccc_res res;
if (psci_ops.smccc_version == SMCCC_VERSION_1_0)
break;
switch (psci_ops.conduit) {
case PSCI_CONDUIT_HVC:
switch (arm_smccc_1_1_get_conduit()) {
case SMCCC_CONDUIT_HVC:
arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
ARM_SMCCC_ARCH_WORKAROUND_1, &res);
if ((int)res.a0 != 0)
@ -90,7 +86,7 @@ static void cpu_v7_spectre_init(void)
spectre_v2_method = "hypervisor";
break;
case PSCI_CONDUIT_SMC:
case SMCCC_CONDUIT_SMC:
arm_smccc_1_1_smc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
ARM_SMCCC_ARCH_WORKAROUND_1, &res);
if ((int)res.a0 != 0)