Hi Andrey,
On Thu, Dec 24, 2015 at 12:30:26PM +0300, Andrey Smetanin wrote:
> Currently on x86 arch we has already 32 requests defined
> so the newer request bits can't be placed inside
> vcpu->requests(unsigned long) inside x86 32 bit system.
> But we are going to add a new request in x86 arch
> for Hyper-V tsc page support.
>
> To solve the problem the patch replaces vcpu->requests by
> bitmap with 64 bit length and uses bitmap API.
>
> The patch consists of:
> * announce kvm_vcpu_has_requests() to check whether vcpu has
> requests
> * announce kvm_vcpu_requests() to get vcpu requests pointer
> * announce kvm_clear_request() to clear particular vcpu request
> * replace if (vcpu->requests) by if (kvm_vcpu_has_requests(vcpu))
> * replace clear_bit(req, vcpu->requests) by
> kvm_clear_request(req, vcpu)
>
> Signed-off-by: Andrey Smetanin <asmeta...@virtuozzo.com>
> CC: Paolo Bonzini <pbonz...@redhat.com>
> CC: Gleb Natapov <g...@kernel.org>
> CC: James Hogan <james.ho...@imgtec.com>
> CC: Paolo Bonzini <pbonz...@redhat.com>
> CC: Paul Burton <paul.bur...@imgtec.com>
> CC: Ralf Baechle <r...@linux-mips.org>
> CC: Alexander Graf <ag...@suse.com>
> CC: Christian Borntraeger <borntrae...@de.ibm.com>
> CC: Cornelia Huck <cornelia.h...@de.ibm.com>
> CC: linux-m...@linux-mips.org
> CC: kvm-ppc@vger.kernel.org
> CC: linux-s...@vger.kernel.org
> CC: Roman Kagan <rka...@virtuozzo.com>
> CC: Denis V. Lunev <d...@openvz.org>
> CC: qemu-de...@nongnu.org
For MIPS KVM bit:
Acked-by: James Hogan <james.ho...@imgtec.com>
Thanks
James
>
> ---
> arch/mips/kvm/emulate.c | 4 +---
> arch/powerpc/kvm/book3s_pr.c | 2 +-
> arch/powerpc/kvm/book3s_pr_papr.c | 2 +-
> arch/powerpc/kvm/booke.c | 6 +++---
> arch/powerpc/kvm/powerpc.c| 6 +++---
> arch/powerpc/kvm/trace.h | 2 +-
> arch/s390/kvm/kvm-s390.c | 4 ++--
> arch/x86/kvm/vmx.c| 2 +-
> arch/x86/kvm/x86.c| 14 +++---
> include/linux/kvm_host.h | 27 ++-
> 10 files changed, 42 insertions(+), 27 deletions(-)
>
> diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
> index 41b1b09..14aebe8 100644
> --- a/arch/mips/kvm/emulate.c
> +++ b/arch/mips/kvm/emulate.c
> @@ -774,10 +774,8 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu
> *vcpu)
>* We we are runnable, then definitely go off to user space to
>* check if any I/O interrupts are pending.
>*/
> - if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) {
> - clear_bit(KVM_REQ_UNHALT, >requests);
> + if (kvm_check_request(KVM_REQ_UNHALT, vcpu))
> vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
> - }
> }
>
> return EMULATE_DONE;
> diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
> index 64891b0..e975279 100644
> --- a/arch/powerpc/kvm/book3s_pr.c
> +++ b/arch/powerpc/kvm/book3s_pr.c
> @@ -349,7 +349,7 @@ static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64
> msr)
> if (msr & MSR_POW) {
> if (!vcpu->arch.pending_exceptions) {
> kvm_vcpu_block(vcpu);
> - clear_bit(KVM_REQ_UNHALT, >requests);
> + kvm_clear_request(KVM_REQ_UNHALT, vcpu));
> vcpu->stat.halt_wakeup++;
>
> /* Unset POW bit after we woke up */
> diff --git a/arch/powerpc/kvm/book3s_pr_papr.c
> b/arch/powerpc/kvm/book3s_pr_papr.c
> index f2c75a1..60cf393 100644
> --- a/arch/powerpc/kvm/book3s_pr_papr.c
> +++ b/arch/powerpc/kvm/book3s_pr_papr.c
> @@ -309,7 +309,7 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
> case H_CEDE:
> kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE);
> kvm_vcpu_block(vcpu);
> - clear_bit(KVM_REQ_UNHALT, >requests);
> + kvm_clear_request(KVM_REQ_UNHALT, vcpu);
> vcpu->stat.halt_wakeup++;
> return EMULATE_DONE;
> case H_LOGICAL_CI_LOAD:
> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
> index fd58751..6bed382 100644
> --- a/arch/powerpc/kvm/booke.c
> +++ b/arch/powerpc/kvm/booke.c
> @@ -574,7 +574,7 @@ static void arm_next_watchdog(struct kvm_vcpu *vcpu)
>* userspace, so clear the KVM_REQ_WATCHDOG request.
>*/
> if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
> - clear_bit(KVM_REQ_WATCHDOG, >re
