[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [RFC XEN PATCH v3 2/3] x86/pvh: Add (un)map_pirq and setup_gsi for PVH dom0
On Fri, Dec 15, 2023 at 07:20:24AM +0000, Chen, Jiqian wrote: > diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c > index d3507d13a029..f665d17afbf5 100644 > --- a/tools/libs/light/libxl_pci.c > +++ b/tools/libs/light/libxl_pci.c > @@ -1486,6 +1486,7 @@ static void pci_add_dm_done(libxl__egc *egc, > goto out_no_irq; > } > if ((fscanf(f, "%u", &irq) == 1) && irq) { > + int gsi = irq; > r = xc_physdev_map_pirq(ctx->xch, domid, irq, &irq); > if (r < 0) { > LOGED(ERROR, domainid, "xc_physdev_map_pirq irq=%d (error=%d)", > @@ -1494,7 +1495,7 @@ static void pci_add_dm_done(libxl__egc *egc, > rc = ERROR_FAIL; > goto out; > } > - r = xc_domain_irq_permission(ctx->xch, domid, irq, 1); > + r = xc_domain_irq_permission(ctx->xch, domid, gsi, 1); > if (r < 0) { > LOGED(ERROR, domainid, > "xc_domain_irq_permission irq=%d (error=%d)", irq, r); > diff --git a/xen/common/domctl.c b/xen/common/domctl.c > index f5a71ee5f78d..782c4a7a70a4 100644 > --- a/xen/common/domctl.c > +++ b/xen/common/domctl.c > @@ -658,7 +658,12 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) > u_domctl) > ret = -EINVAL; > break; > } > - irq = pirq_access_permitted(current->domain, pirq); > + > + if ( is_hvm_domain(current->domain) ) > + irq = pirq; > + else > + irq = pirq_access_permitted(current->domain, pirq); You are dropping an irq_access_permitted() check here for the HVM case, as pirq_access_permitted() translates from pirq to irq and also checks for permissions. This would need to be something along the lines of: irq = 0; if ( is_hvm_domain(current->domain) && irq_access_permitted(current->domain, pirq) ) irq = pirq; else irq = pirq_access_permitted(current->domain, pirq); And then I wonder whether it wouldn't be best to uniformly use a GSI for both PV and HVM. Thanks, Roger.
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