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Thu, 09 Oct 2025 00:51:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE++XMu4ekhBRSyEQC3OxsD4S2QcrcWTzHbtqJp7O30pX0J0x7ufZdn7fF/oEbfwFBdfBYUcQ== X-Received: by 2002:a05:6000:60f:b0:411:f07a:680b with SMTP id ffacd0b85a97d-4266e8d8a7dmr4377770f8f.33.1759996277595; Thu, 09 Oct 2025 00:51:17 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Magnus Kulke Subject: [PULL 23/35] target/i386/mshv: Set local interrupt controller state Date: Thu, 9 Oct 2025 09:50:13 +0200 Message-ID: <20251009075026.505715-24-pbonzini@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251009075026.505715-1-pbonzini@redhat.com> References: <20251009075026.505715-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.442, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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 @redhat.com) X-ZM-MESSAGEID: 1759996558282154100 Content-Type: text/plain; charset="utf-8" From: Magnus Kulke To set the local interrupt controller state, perform hv calls retrieving partition state from the hypervisor. Signed-off-by: Magnus Kulke Link: https://lore.kernel.org/r/20250916164847.77883-18-magnuskulke@linux.m= icrosoft.com Signed-off-by: Paolo Bonzini --- target/i386/mshv/mshv-cpu.c | 117 ++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) diff --git a/target/i386/mshv/mshv-cpu.c b/target/i386/mshv/mshv-cpu.c index 8b10c79e547..0fe3cbb48d8 100644 --- a/target/i386/mshv/mshv-cpu.c +++ b/target/i386/mshv/mshv-cpu.c @@ -12,6 +12,7 @@ =20 #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qemu/memalign.h" #include "qemu/typedefs.h" =20 #include "system/mshv.h" @@ -21,6 +22,7 @@ #include "hw/hyperv/hvgdk.h" #include "hw/hyperv/hvgdk_mini.h" #include "hw/hyperv/hvhdk_mini.h" +#include "hw/i386/apic_internal.h" =20 #include "cpu.h" #include "emulate/x86_decode.h" @@ -562,6 +564,114 @@ static int set_cpu_state(const CPUState *cpu, const M= shvFPU *fpu_regs, return 0; } =20 +static int get_vp_state(int cpu_fd, struct mshv_get_set_vp_state *state) +{ + int ret; + + ret =3D ioctl(cpu_fd, MSHV_GET_VP_STATE, state); + if (ret < 0) { + error_report("failed to get partition state: %s", strerror(errno)); + return -1; + } + + return 0; +} + +static int get_lapic(int cpu_fd, + struct hv_local_interrupt_controller_state *state) +{ + int ret; + size_t size =3D 4096; + /* buffer aligned to 4k, as *state requires that */ + void *buffer =3D qemu_memalign(size, size); + struct mshv_get_set_vp_state mshv_state =3D { 0 }; + + mshv_state.buf_ptr =3D (uint64_t) buffer; + mshv_state.buf_sz =3D size; + mshv_state.type =3D MSHV_VP_STATE_LAPIC; + + ret =3D get_vp_state(cpu_fd, &mshv_state); + if (ret =3D=3D 0) { + memcpy(state, buffer, sizeof(*state)); + } + qemu_vfree(buffer); + if (ret < 0) { + error_report("failed to get lapic"); + return -1; + } + + return 0; +} + +static uint32_t set_apic_delivery_mode(uint32_t reg, uint32_t mode) +{ + return ((reg) & ~0x700) | ((mode) << 8); +} + +static int set_vp_state(int cpu_fd, const struct mshv_get_set_vp_state *st= ate) +{ + int ret; + + ret =3D ioctl(cpu_fd, MSHV_SET_VP_STATE, state); + if (ret < 0) { + error_report("failed to set partition state: %s", strerror(errno)); + return -1; + } + + return 0; +} + +static int set_lapic(int cpu_fd, + const struct hv_local_interrupt_controller_state *sta= te) +{ + int ret; + size_t size =3D 4096; + /* buffer aligned to 4k, as *state requires that */ + void *buffer =3D qemu_memalign(size, size); + struct mshv_get_set_vp_state mshv_state =3D { 0 }; + + if (!state) { + error_report("lapic state is NULL"); + return -1; + } + memcpy(buffer, state, sizeof(*state)); + + mshv_state.buf_ptr =3D (uint64_t) buffer; + mshv_state.buf_sz =3D size; + mshv_state.type =3D MSHV_VP_STATE_LAPIC; + + ret =3D set_vp_state(cpu_fd, &mshv_state); + qemu_vfree(buffer); + if (ret < 0) { + error_report("failed to set lapic: %s", strerror(errno)); + return -1; + } + + return 0; +} + +static int set_lint(int cpu_fd) +{ + int ret; + uint32_t *lvt_lint0, *lvt_lint1; + + struct hv_local_interrupt_controller_state lapic_state =3D { 0 }; + ret =3D get_lapic(cpu_fd, &lapic_state); + if (ret < 0) { + return ret; + } + + lvt_lint0 =3D &lapic_state.apic_lvt_lint0; + *lvt_lint0 =3D set_apic_delivery_mode(*lvt_lint0, APIC_DM_EXTINT); + + lvt_lint1 =3D &lapic_state.apic_lvt_lint1; + *lvt_lint1 =3D set_apic_delivery_mode(*lvt_lint1, APIC_DM_NMI); + + /* TODO: should we skip setting lapic if the values are the same? */ + + return set_lapic(cpu_fd, &lapic_state); +} + /* * TODO: populate topology info: * @@ -573,6 +683,7 @@ int mshv_configure_vcpu(const CPUState *cpu, const stru= ct MshvFPU *fpu, uint64_t xcr0) { int ret; + int cpu_fd =3D mshv_vcpufd(cpu); =20 ret =3D set_cpu_state(cpu, fpu, xcr0); if (ret < 0) { @@ -580,6 +691,12 @@ int mshv_configure_vcpu(const CPUState *cpu, const str= uct MshvFPU *fpu, return -1; } =20 + ret =3D set_lint(cpu_fd); + if (ret < 0) { + error_report("failed to set lpic int"); + return -1; + } + return 0; } =20 --=20 2.51.0