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Smith" To: xen-devel@lists.xenproject.org Cc: "Daniel P. Smith" , jason.andryuk@amd.com, stefano.stabellini@amd.com, agarciav@amd.com, Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [RFC 06/38] x86/hyperlaunch: add hardware domain capability support Date: Sat, 19 Apr 2025 18:07:48 -0400 Message-Id: <20250419220820.4234-7-dpsmith@apertussolutions.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20250419220820.4234-1-dpsmith@apertussolutions.com> References: <20250419220820.4234-1-dpsmith@apertussolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External X-ZohoMail-DKIM: pass (identity dpsmith@apertussolutions.com) X-ZM-MESSAGEID: 1745100657670019000 Content-Type: text/plain; charset="utf-8" Introduce a capability flag to the capabilities property of a domain node in the hyperlaunch device tree. In the domain construction, use the capability flag to determine if CDF_hardware should be set on the domain config. Signed-off-by: Daniel P. Smith --- xen/arch/x86/domain-builder/core.c | 3 ++- xen/arch/x86/domain-builder/fdt.c | 2 ++ xen/arch/x86/include/asm/boot-domain.h | 1 + xen/arch/x86/setup.c | 8 ++++++-- 4 files changed, 11 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/domain-builder/core.c b/xen/arch/x86/domain-build= er/core.c index 6ab4e6fe5333..8d137ecaaf84 100644 --- a/xen/arch/x86/domain-builder/core.c +++ b/xen/arch/x86/domain-builder/core.c @@ -96,7 +96,8 @@ void __init builder_init(struct boot_info *bi) i =3D first_boot_module_index(bi, BOOTMOD_UNKNOWN); bi->mods[i].type =3D BOOTMOD_KERNEL; bi->domains[0].kernel =3D &bi->mods[i]; - bi->domains[0].capabilities |=3D BUILD_CAPS_CONTROL; + bi->domains[0].capabilities |=3D + (BUILD_CAPS_CONTROL | BUILD_CAPS_HARDWARE); bi->nr_domains =3D 1; } } diff --git a/xen/arch/x86/domain-builder/fdt.c b/xen/arch/x86/domain-builde= r/fdt.c index d2a7e010ea77..1af58ed4eb86 100644 --- a/xen/arch/x86/domain-builder/fdt.c +++ b/xen/arch/x86/domain-builder/fdt.c @@ -267,6 +267,8 @@ static int __init process_domain_node( printk(" caps: "); if ( bd->capabilities & BUILD_CAPS_CONTROL ) printk("c"); + if ( bd->capabilities & BUILD_CAPS_HARDWARE ) + printk(" h"); printk("\n"); } } diff --git a/xen/arch/x86/include/asm/boot-domain.h b/xen/arch/x86/include/= asm/boot-domain.h index b0f956cd734e..18d144de2fea 100644 --- a/xen/arch/x86/include/asm/boot-domain.h +++ b/xen/arch/x86/include/asm/boot-domain.h @@ -15,6 +15,7 @@ struct boot_domain { =20 #define BUILD_CAPS_NONE (0) #define BUILD_CAPS_CONTROL (1 << 0) +#define BUILD_CAPS_HARDWARE (1 << 1) uint32_t capabilities; =20 /* On | Off */ diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index 41e46f05a520..760262ea3d4c 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -1035,8 +1035,12 @@ static struct domain *__init create_dom0(struct boot= _info *bi) XEN_X86_EMU_LAPIC | XEN_X86_EMU_IOAPIC | XEN_X86_EMU_VPCI; } =20 - if ( iommu_enabled ) - dom0_cfg.flags |=3D XEN_DOMCTL_CDF_iommu; + if ( bd->capabilities & BUILD_CAPS_HARDWARE ) + { + create_flags |=3D CDF_hardware; + if ( iommu_enabled ) + dom0_cfg.flags |=3D XEN_DOMCTL_CDF_iommu; + } =20 if ( bd->domid =3D=3D DOMID_INVALID ) /* Create initial domain. Not d0 for pvshim. */ --=20 2.30.2