shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1

Browse Source 
Commit add5609877 upstream.

Report support for SMCCC_ARCH_WORKAROUND_1 to KVM guests for affected
CPUs.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Boot-tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Russell King
2018-11-07 11:43:53 -05:00
committed by Greg Kroah-Hartman
parent b894054411
commit 3aa01740a2
1 changed files with 12 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/include/asm/kvm_host.h
View File

@@ -21,6 +21,7 @@
#include <linux/types.h>
#include <linux/kvm_types.h>
#include <asm/cputype.h>
#include <asm/kvm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
@@ -323,8 +324,17 @@ static inline int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
static inline bool kvm_arm_harden_branch_predictor(void)
{
/* No way to detect it yet, pretend it is not there. */
return false;
switch(read_cpuid_part()) {
#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
case ARM_CPU_PART_BRAHMA_B15:
case ARM_CPU_PART_CORTEX_A12:
case ARM_CPU_PART_CORTEX_A15:
case ARM_CPU_PART_CORTEX_A17:
return true;
#endif
default:
return false;
}
}
#define KVM_SSBD_UNKNOWN -1