From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [PATCH v6 12/24] KVM: arm64: vgic-its: Interpret MAPD ITT_addr field Date: Thu, 4 May 2017 19:16:27 +0200 Message-ID: <20170504171627.GW5923@cbox> References: <1493898284-29504-1-git-send-email-eric.auger@redhat.com> <1493898284-29504-13-git-send-email-eric.auger@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: eric.auger.pro@gmail.com, marc.zyngier@arm.com, christoffer.dall@linaro.org, andre.przywara@arm.com, vijayak@caviumnetworks.com, Vijaya.Kumar@cavium.com, peter.maydell@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Prasun.Kapoor@cavium.com, drjones@redhat.com, pbonzini@redhat.com, dgilbert@redhat.com, quintela@redhat.com, bjsprakash.linux@gmail.com To: Eric Auger Return-path: Received: from mail-wm0-f50.google.com ([74.125.82.50]:37932 "EHLO mail-wm0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751593AbdEDRQa (ORCPT ); Thu, 4 May 2017 13:16:30 -0400 Received: by mail-wm0-f50.google.com with SMTP id 142so1474374wma.1 for ; Thu, 04 May 2017 10:16:30 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1493898284-29504-13-git-send-email-eric.auger@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, May 04, 2017 at 01:44:32PM +0200, Eric Auger wrote: > Up to now the MAPD ITT_addr had been ignored. We will need it > for save/restore. Let's record it in the its_device struct. > > Signed-off-by: Eric Auger > Reviewed-by: Christoffer Dall > --- > v5 -> v6: > - fix its_cmd_get_ittaddr and pass 44 to its_cmd_mask_field > > v4 -> v5: > - its_cmd_get_ittaddr macro now returns the actual ITT GPA > > v3 -> v4: > - in vgic_its_cmd_handle_mapd, itt_addr directly is shifted > - correct ittaddr bitmask to support 48bit GPA > --- > virt/kvm/arm/vgic/vgic-its.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c > index 06e01d1..6da548d 100644 > --- a/virt/kvm/arm/vgic/vgic-its.c > +++ b/virt/kvm/arm/vgic/vgic-its.c > @@ -106,6 +106,7 @@ struct its_device { > /* the head for the list of ITTEs */ > struct list_head itt_head; > u32 num_eventid_bits; > + gpa_t itt_addr; > u32 device_id; > }; > > @@ -576,6 +577,7 @@ static u64 its_cmd_mask_field(u64 *its_cmd, int word, int shift, int size) > #define its_cmd_get_id(cmd) its_cmd_mask_field(cmd, 1, 0, 32) > #define its_cmd_get_physical_id(cmd) its_cmd_mask_field(cmd, 1, 32, 32) > #define its_cmd_get_collection(cmd) its_cmd_mask_field(cmd, 2, 0, 16) > +#define its_cmd_get_ittaddr(cmd) (its_cmd_mask_field(cmd, 2, 8, 44) << 8) > #define its_cmd_get_target_addr(cmd) its_cmd_mask_field(cmd, 2, 16, 32) > #define its_cmd_get_validbit(cmd) its_cmd_mask_field(cmd, 2, 63, 1) > > @@ -847,6 +849,7 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its, > u32 device_id = its_cmd_get_deviceid(its_cmd); > bool valid = its_cmd_get_validbit(its_cmd); > u8 num_eventid_bits = its_cmd_get_size(its_cmd); > + gpa_t itt_addr = its_cmd_get_ittaddr(its_cmd); > struct its_device *device; > > if (!vgic_its_check_id(its, its->baser_device_table, device_id)) > @@ -878,6 +881,7 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its, > > device->device_id = device_id; > device->num_eventid_bits = num_eventid_bits; > + device->itt_addr = itt_addr; > > INIT_LIST_HEAD(&device->itt_head); > > -- > 2.5.5 >