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| author | Andre Przywara <andre.przywara@arm.com> | 2014-06-02 15:37:13 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-20 18:25:17 +0100 |
| commit | 4429fc64b90368e9bc93f933ea8b011d8db3a2f2 (patch) | |
| tree | a7cb2e3dbebe4c2d6dc7a17e648a04b1c82090b9 /arch/arm/kvm/psci.c | |
| parent | 7276030a082c9c33150e5900a80e26c6e3189b16 (diff) | |
| download | lwn-4429fc64b90368e9bc93f933ea8b011d8db3a2f2.tar.gz lwn-4429fc64b90368e9bc93f933ea8b011d8db3a2f2.zip | |
arm/arm64: KVM: rework MPIDR assignment and add accessors
The virtual MPIDR registers (containing topology information) for the
guest are currently mapped linearily to the vcpu_id. Improve this
mapping for arm64 by using three levels to not artificially limit the
number of vCPUs.
To help this, change and rename the kvm_vcpu_get_mpidr() function to
mask off the non-affinity bits in the MPIDR register.
Also add an accessor to later allow easier access to a vCPU with a
given MPIDR. Use this new accessor in the PSCI emulation.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/kvm/psci.c')
| -rw-r--r-- | arch/arm/kvm/psci.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c index 58cb3248d277..02fa8eff6ae1 100644 --- a/arch/arm/kvm/psci.c +++ b/arch/arm/kvm/psci.c @@ -22,6 +22,7 @@ #include <asm/cputype.h> #include <asm/kvm_emulate.h> #include <asm/kvm_psci.h> +#include <asm/kvm_host.h> /* * This is an implementation of the Power State Coordination Interface @@ -66,25 +67,17 @@ static void kvm_psci_vcpu_off(struct kvm_vcpu *vcpu) static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) { struct kvm *kvm = source_vcpu->kvm; - struct kvm_vcpu *vcpu = NULL, *tmp; + struct kvm_vcpu *vcpu = NULL; wait_queue_head_t *wq; unsigned long cpu_id; unsigned long context_id; - unsigned long mpidr; phys_addr_t target_pc; - int i; - cpu_id = *vcpu_reg(source_vcpu, 1); + cpu_id = *vcpu_reg(source_vcpu, 1) & MPIDR_HWID_BITMASK; if (vcpu_mode_is_32bit(source_vcpu)) cpu_id &= ~((u32) 0); - kvm_for_each_vcpu(i, tmp, kvm) { - mpidr = kvm_vcpu_get_mpidr(tmp); - if ((mpidr & MPIDR_HWID_BITMASK) == (cpu_id & MPIDR_HWID_BITMASK)) { - vcpu = tmp; - break; - } - } + vcpu = kvm_mpidr_to_vcpu(kvm, cpu_id); /* * Make sure the caller requested a valid CPU and that the CPU is @@ -155,7 +148,7 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) * then ON else OFF */ kvm_for_each_vcpu(i, tmp, kvm) { - mpidr = kvm_vcpu_get_mpidr(tmp); + mpidr = kvm_vcpu_get_mpidr_aff(tmp); if (((mpidr & target_affinity_mask) == target_affinity) && !tmp->arch.pause) { return PSCI_0_2_AFFINITY_LEVEL_ON; |