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Tsirkin" , Paolo Bonzini , Mohamed Mediouni Subject: [PATCH v3 5/9] hw/arm, target/arm: nested virtualisation on HVF Date: Sat, 26 Jul 2025 00:30:31 +0200 Message-Id: <20250725223035.52284-6-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250725223035.52284-1-mohamed@unpredictable.fr> References: <20250725223035.52284-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: W3Yn_c6TgROg2D8CG0qfI13KJQEUBuzE X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI1MDE5NSBTYWx0ZWRfX6sYEv4ElXLmb jNWfAcg6tvwmXxmGQyvnwmFc3CPQQoPDuTWywkFg1C/WdPLau7jsqc5ae/0FRkk30MhDE2/tvYr aJDpBX8zPN6wFmK3MoeR8uiFUl3yRb8dbGYDfSpEyyCWIP0B8XzspO2eZAU1NDBeUAldzw+hOiq oMB883/iBRswkQuzp1U3lzmTV8Ly6NvgSnBppXhEvSTU/5aa4GfGa3PrLNv67KW3iHZ2VRh4Uky ktxPPhOcoCef9g0KT++j81cP4uWmIspuT8s34uK+THXLhFsW7xQXq8bQbVQQzzvi3TjGJa27w= X-Proofpoint-ORIG-GUID: W3Yn_c6TgROg2D8CG0qfI13KJQEUBuzE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-07-25_06,2025-07-24_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 bulkscore=0 spamscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 clxscore=1030 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506270000 definitions=main-2507250195 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=57.103.86.112; envelope-from=mohamed@unpredictable.fr; helo=outbound.qs.icloud.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @unpredictable.fr) X-ZM-MESSAGEID: 1753482944711116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Mohamed Mediouni --- hw/arm/virt.c | 9 ++++++--- target/arm/hvf-stub.c | 15 +++++++++++++++ target/arm/hvf/hvf.c | 35 +++++++++++++++++++++++++++++++++++ target/arm/hvf_arm.h | 3 +++ 4 files changed, 59 insertions(+), 3 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 7da1176cda..7348d55104 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -817,8 +817,7 @@ static void create_gic(VirtMachineState *vms, MemoryReg= ion *mem) g_assert_not_reached(); } =20 - if (kvm_enabled() && vms->virt && - (revision !=3D 3 || !kvm_irqchip_in_kernel())) { + if (kvm_enabled() && vms->virt && (revision !=3D 3 || !kvm_irqchip_in_= kernel())) { error_report("KVM EL2 is only supported with in-kernel GICv3"); exit(1); } @@ -2279,7 +2278,8 @@ static void machvirt_init(MachineState *machine) exit(1); } =20 - if (vms->virt && !kvm_enabled() && !tcg_enabled() && !qtest_enabled())= { + if (vms->virt && !kvm_enabled() && !tcg_enabled() + && !hvf_enabled() && !qtest_enabled()) { error_report("mach-virt: %s does not support providing " "Virtualization extensions to the guest CPU", current_accel_name()); @@ -2549,6 +2549,9 @@ static void virt_set_virt(Object *obj, bool value, Er= ror **errp) VirtMachineState *vms =3D VIRT_MACHINE(obj); =20 vms->virt =3D value; +#if defined(CONFIG_HVF) && defined(__aarch64__) + hvf_arm_el2_enable(value); +#endif } =20 static bool virt_get_highmem(Object *obj, Error **errp) diff --git a/target/arm/hvf-stub.c b/target/arm/hvf-stub.c index ff137267a0..95ec4ea62f 100644 --- a/target/arm/hvf-stub.c +++ b/target/arm/hvf-stub.c @@ -18,3 +18,18 @@ uint32_t hvf_arm_get_max_ipa_bit_size(void) { g_assert_not_reached(); } + +bool hvf_arm_el2_supported(void) +{ + g_assert_not_reached(); +} + +bool hvf_arm_el2_enabled(void) +{ + g_assert_not_reached(); +} + +void hvf_arm_el2_enable(bool) +{ + g_assert_not_reached(); +} diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 7beb47caad..affc22ff61 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -26,6 +26,7 @@ #include "system/address-spaces.h" #include "system/memory.h" #include "hw/boards.h" +#include "hw/arm/virt.h" #include "hw/irq.h" #include "qemu/main-loop.h" #include "system/cpus.h" @@ -891,6 +892,10 @@ static bool hvf_arm_get_host_cpu_features(ARMHostCPUFe= atures *ahcf) (1ULL << ARM_FEATURE_PMU) | (1ULL << ARM_FEATURE_GENERIC_TIMER); =20 + if (hvf_arm_el2_enabled()) { + ahcf->features |=3D 1ULL << ARM_FEATURE_EL2; + } + /* We set up a small vcpu to extract host registers */ =20 if (hv_vcpu_create(&fd, &exit, NULL) !=3D HV_SUCCESS) { @@ -964,6 +969,25 @@ uint32_t hvf_arm_get_max_ipa_bit_size(void) return round_down_to_parange_bit_size(max_ipa_size); } =20 +bool hvf_arm_el2_supported(void) +{ + bool is_nested_virt_supported; + hv_return_t ret =3D hv_vm_config_get_el2_supported(&is_nested_virt_sup= ported); + assert_hvf_ok(ret); + return is_nested_virt_supported; +} + +static bool is_nested_virt_enabled =3D false; +bool hvf_arm_el2_enabled(void) +{ + return is_nested_virt_enabled; +} + +void hvf_arm_el2_enable(bool enable) +{ + is_nested_virt_enabled =3D enable; +} + void hvf_arm_set_cpu_features_from_host(ARMCPU *cpu) { if (!arm_host_cpu_features.dtb_compatible) { @@ -1000,6 +1024,13 @@ hv_return_t hvf_arch_vm_create(MachineState *ms, uin= t32_t pa_range) } chosen_ipa_bit_size =3D pa_range; =20 + if (hvf_arm_el2_enabled()) { + ret =3D hv_vm_config_set_el2_enabled(config, true); + if (ret !=3D HV_SUCCESS) { + goto cleanup; + } + } + ret =3D hv_vm_create(config); if (hvf_irqchip_in_kernel()) { /* @@ -1146,6 +1177,10 @@ static bool hvf_handle_psci_call(CPUState *cpu) int target_el =3D 1; int32_t ret =3D 0; =20 + if (hvf_arm_el2_enabled()) { + target_el =3D 2; + } + trace_hvf_psci_call(param[0], param[1], param[2], param[3], arm_cpu_mp_affinity(arm_cpu)); =20 diff --git a/target/arm/hvf_arm.h b/target/arm/hvf_arm.h index ea82f2691d..bf55e7ae28 100644 --- a/target/arm/hvf_arm.h +++ b/target/arm/hvf_arm.h @@ -24,5 +24,8 @@ void hvf_arm_set_cpu_features_from_host(ARMCPU *cpu); =20 uint32_t hvf_arm_get_default_ipa_bit_size(void); uint32_t hvf_arm_get_max_ipa_bit_size(void); +bool hvf_arm_el2_supported(void); +bool hvf_arm_el2_enabled(void); +void hvf_arm_el2_enable(bool); =20 #endif --=20 2.39.5 (Apple Git-154)