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d="scan'208";a="3728532" From: Paul Durrant To: Date: Tue, 30 Jul 2019 10:39:01 +0100 Message-ID: <20190730093904.1794-3-paul.durrant@citrix.com> X-Mailer: git-send-email 2.20.1.2.gb21ebb671 In-Reply-To: <20190730093904.1794-1-paul.durrant@citrix.com> References: <20190730093904.1794-1-paul.durrant@citrix.com> MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v3 2/5] x86/hvm/domain: remove the 'hap_enabled' flag X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , Paul Durrant , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" The hap_enabled() macro can determine whether the feature is available using the domain 'options'; there is no need for a separate flag. NOTE: Furthermore, by extending sanitiziing of the domain 'options', the macro can be transformed into an inline function and re-located to xen/sched.h. This also makes hap_enabled() common, thus allowing removal of an ugly ifdef CONFIG_X86 from the common iommu code. Signed-off-by: Paul Durrant --- Cc: Jan Beulich Cc: Andrew Cooper Cc: Wei Liu Cc: "Roger Pau Monn=C3=A9" Cc: George Dunlap Cc: Ian Jackson Cc: Julien Grall Cc: Konrad Rzeszutek Wilk Cc: Stefano Stabellini Cc: Tim Deegan Cc: George Dunlap v3: - Re-worked as suggested by Jan - Not adding Roger's R-b as the patch has changed substantially v2: - Defer changes to shadow_domain_init() to patch #4 --- xen/arch/x86/domain.c | 13 +++++++------ xen/arch/x86/mm/paging.c | 4 ++-- xen/common/domain.c | 7 +++++++ xen/drivers/passthrough/iommu.c | 2 -- xen/include/asm-x86/hvm/domain.h | 7 ------- xen/include/asm-x86/paging.h | 2 +- xen/include/xen/sched.h | 5 +++++ 7 files changed, 22 insertions(+), 18 deletions(-) diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c index 5933b3f51b..0f43da3b6a 100644 --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -460,6 +460,12 @@ int arch_sanitise_domain_config(struct xen_domctl_crea= tedomain *config) return -EINVAL; } =20 + if ( config->flags & XEN_DOMCTL_CDF_hap && !hvm_hap_supported() ) + { + dprintk(XENLOG_INFO, "HAP enabled but not supported\n"); + return -EINVAL; + } + return 0; } =20 @@ -564,12 +570,7 @@ int arch_domain_create(struct domain *d, HYPERVISOR_COMPAT_VIRT_START(d) =3D is_pv_domain(d) ? __HYPERVISOR_COMPAT_VIRT_START : ~0u; =20 - /* Need to determine if HAP is enabled before initialising paging */ - if ( is_hvm_domain(d) ) - d->arch.hvm.hap_enabled =3D - hvm_hap_supported() && (config->flags & XEN_DOMCTL_CDF_hap); - - if ( (rc =3D paging_domain_init(d, config->flags)) !=3D 0 ) + if ( (rc =3D paging_domain_init(d)) !=3D 0 ) goto fail; paging_initialised =3D true; =20 diff --git a/xen/arch/x86/mm/paging.c b/xen/arch/x86/mm/paging.c index 011089368a..097a27f608 100644 --- a/xen/arch/x86/mm/paging.c +++ b/xen/arch/x86/mm/paging.c @@ -632,7 +632,7 @@ void paging_log_dirty_init(struct domain *d, const stru= ct log_dirty_ops *ops) /* CODE FOR PAGING SUPPORT */ /************************************************/ /* Domain paging struct initialization. */ -int paging_domain_init(struct domain *d, unsigned int domcr_flags) +int paging_domain_init(struct domain *d) { int rc; =20 @@ -653,7 +653,7 @@ int paging_domain_init(struct domain *d, unsigned int d= omcr_flags) if ( hap_enabled(d) ) hap_domain_init(d); else - rc =3D shadow_domain_init(d, domcr_flags); + rc =3D shadow_domain_init(d, d->options); =20 return rc; } diff --git a/xen/common/domain.c b/xen/common/domain.c index df523c9ce4..53d0a62f82 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -313,6 +313,13 @@ static int sanitise_domain_config(struct xen_domctl_cr= eatedomain *config) return -EINVAL; } =20 + if ( !(config->flags & XEN_DOMCTL_CDF_hvm_guest) && + config->flags & XEN_DOMCTL_CDF_hap ) + { + dprintk(XENLOG_INFO, "HAP enabled for non-HVM guest\n"); + return -EINVAL; + } + return arch_sanitise_domain_config(config); } =20 diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iomm= u.c index f8c3bf53bd..37eb0f7d01 100644 --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -573,9 +573,7 @@ int iommu_do_domctl( =20 void iommu_share_p2m_table(struct domain* d) { -#ifdef CONFIG_X86 ASSERT(hap_enabled(d)); -#endif /* * iommu_use_hap_pt(d) cannot be used here because during domain * construction need_iommu(d) will always return false here. diff --git a/xen/include/asm-x86/hvm/domain.h b/xen/include/asm-x86/hvm/dom= ain.h index 6c7c4f5aa6..bcc5621797 100644 --- a/xen/include/asm-x86/hvm/domain.h +++ b/xen/include/asm-x86/hvm/domain.h @@ -156,7 +156,6 @@ struct hvm_domain { =20 struct viridian_domain *viridian; =20 - bool_t hap_enabled; bool_t mem_sharing_enabled; bool_t qemu_mapcache_invalidate; bool_t is_s3_suspended; @@ -195,12 +194,6 @@ struct hvm_domain { }; }; =20 -#ifdef CONFIG_HVM -#define hap_enabled(d) (is_hvm_domain(d) && (d)->arch.hvm.hap_enabled) -#else -#define hap_enabled(d) ({(void)(d); false;}) -#endif - #endif /* __ASM_X86_HVM_DOMAIN_H__ */ =20 /* diff --git a/xen/include/asm-x86/paging.h b/xen/include/asm-x86/paging.h index cf57ca708d..ab7887f23c 100644 --- a/xen/include/asm-x86/paging.h +++ b/xen/include/asm-x86/paging.h @@ -207,7 +207,7 @@ void paging_vcpu_init(struct vcpu *v); =20 /* Set up the paging-assistance-specific parts of a domain struct at * start of day. Called for every domain from arch_domain_create() */ -int paging_domain_init(struct domain *d, unsigned int domcr_flags); +int paging_domain_init(struct domain *d); =20 /* Handler for paging-control ops: operations from user-space to enable * and disable ephemeral shadow modes (test mode and log-dirty mode) and diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 79eff418c4..e14540966f 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -948,6 +948,11 @@ static inline bool is_hvm_domain(const struct domain *= d) evaluate_nospec(d->options & XEN_DOMCTL_CDF_hvm_guest); } =20 +static inline bool hap_enabled(const struct domain *d) +{ + return evaluate_nospec(d->options & XEN_DOMCTL_CDF_hap); +} + static inline bool is_hvm_vcpu(const struct vcpu *v) { return is_hvm_domain(v->domain); --=20 2.20.1.2.gb21ebb671 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel