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Tsirkin" , Igor Mammedov , Paolo Bonzini , Yanan Wang , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Shannon Zhao , kvm@vger.kernel.org, Peter Maydell , Marcel Apfelbaum , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Pedro Barbuda , Zhao Liu , Roman Bolshakov , Pierrick Bouvier Subject: [PATCH v7 13/24] whpx: copy over memory management logic from hvf Date: Thu, 16 Oct 2025 18:55:09 +0200 Message-ID: <20251016165520.62532-14-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251016165520.62532-1-mohamed@unpredictable.fr> References: <20251016165520.62532-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-ORIG-GUID: RW90amPd7TnaVi7O2M9X-eJZ3T1_GCLi X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDE2MDEyMiBTYWx0ZWRfX+eHzf3Mr8o8d 1Mt6HZTElluV+7BDfo3l7pJqg0SVJtAElcIr050CGPLayKXXeZVgMpSWNky0/YoQXquKRPbXA/5 p842yni4mkVJdEXfwUkIhtimezDYDdjc5ocQuGnuIMRRfdNYkCT6lWkFjNnjPWEydqGABS1k95W qJdRLOISEG75LDL9JRP+Osj+85LvekJ23J1VVfbiKmflubIrXBk8P2p1bPwx/fts+PyqMMzz9bn 0K6imtqHiVPmWZRW8DPMvvNMkMMlXP933v/Qv1RU/NMZbD718uDu4cTEbMw7chuU7aNISD6Yw= X-Proofpoint-GUID: RW90amPd7TnaVi7O2M9X-eJZ3T1_GCLi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-16_03,2025-10-13_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 spamscore=0 suspectscore=0 clxscore=1030 bulkscore=0 malwarescore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506270000 definitions=main-2510160122 X-JNJ: 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 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=57.103.76.74; envelope-from=mohamed@unpredictable.fr; helo=outbound.st.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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-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: 1760634044882154100 Content-Type: text/plain; charset="utf-8" This allows edk2 to work, although u-boot is still not functional. Signed-off-by: Mohamed Mediouni Reviewed-by: Pierrick Bouvier --- accel/whpx/whpx-common.c | 201 ++++++++++++++++++++++++++++----------- 1 file changed, 147 insertions(+), 54 deletions(-) diff --git a/accel/whpx/whpx-common.c b/accel/whpx/whpx-common.c index c69792e638..f324f5c146 100644 --- a/accel/whpx/whpx-common.c +++ b/accel/whpx/whpx-common.c @@ -258,89 +258,174 @@ void whpx_vcpu_kick(CPUState *cpu) * Memory support. */ =20 -static void whpx_update_mapping(hwaddr start_pa, ram_addr_t size, - void *host_va, int add, int rom, - const char *name) + /* whpx_slot flags */ +#define WHPX_SLOT_LOG (1 << 0) +typedef struct whpx_slot { + uint64_t start; + uint64_t size; + uint8_t *mem; + int slot_id; + uint32_t flags; + MemoryRegion *region; +} whpx_slot; + +typedef struct WHPXState { + whpx_slot slots[32]; + int num_slots; +} WHPXState; + + WHPXState *whpx_state; + + struct mac_slot { + int present; + uint64_t size; + uint64_t gpa_start; + uint64_t gva; +}; + +struct mac_slot mac_slots[32]; + +static int do_whpx_set_memory(whpx_slot *slot, WHV_MAP_GPA_RANGE_FLAGS fla= gs) { struct whpx_state *whpx =3D &whpx_global; + struct mac_slot *macslot; HRESULT hr; =20 - /* - if (add) { - printf("WHPX: ADD PA:%p Size:%p, Host:%p, %s, '%s'\n", - (void*)start_pa, (void*)size, host_va, - (rom ? "ROM" : "RAM"), name); - } else { - printf("WHPX: DEL PA:%p Size:%p, Host:%p, '%s'\n", - (void*)start_pa, (void*)size, host_va, name); + macslot =3D &mac_slots[slot->slot_id]; + + if (macslot->present) { + if (macslot->size !=3D slot->size) { + macslot->present =3D 0; + hr =3D whp_dispatch.WHvUnmapGpaRange(whpx->partition, + macslot->gpa_start, macslot->size); + if (FAILED(hr)) { + abort(); + } + } } - */ - - if (add) { - hr =3D whp_dispatch.WHvMapGpaRange(whpx->partition, - host_va, - start_pa, - size, - (WHvMapGpaRangeFlagRead | - WHvMapGpaRangeFlagExecute | - (rom ? 0 : WHvMapGpaRangeFlagWri= te))); - } else { - hr =3D whp_dispatch.WHvUnmapGpaRange(whpx->partition, - start_pa, - size); + + if (!slot->size) { + return 0; } =20 - if (FAILED(hr)) { - error_report("WHPX: Failed to %s GPA range '%s' PA:%p, Size:%p byt= es," - " Host:%p, hr=3D%08lx", - (add ? "MAP" : "UNMAP"), name, - (void *)(uintptr_t)start_pa, (void *)size, host_va, h= r); + macslot->present =3D 1; + macslot->gpa_start =3D slot->start; + macslot->size =3D slot->size; + hr =3D whp_dispatch.WHvMapGpaRange(whpx->partition, + slot->mem, slot->start, slot->size, flags); + return 0; +} + +static whpx_slot *whpx_find_overlap_slot(uint64_t start, uint64_t size) +{ + whpx_slot *slot; + int x; + for (x =3D 0; x < whpx_state->num_slots; ++x) { + slot =3D &whpx_state->slots[x]; + if (slot->size && start < (slot->start + slot->size) && + (start + size) > slot->start) { + return slot; + } } + return NULL; } =20 -static void whpx_process_section(MemoryRegionSection *section, int add) +static void whpx_set_phys_mem(MemoryRegionSection *section, bool add) { - MemoryRegion *mr =3D section->mr; - hwaddr start_pa =3D section->offset_within_address_space; - ram_addr_t size =3D int128_get64(section->size); - unsigned int delta; - uint64_t host_va; + whpx_slot *mem; + MemoryRegion *area =3D section->mr; + bool writable =3D !area->readonly && !area->rom_device; + WHV_MAP_GPA_RANGE_FLAGS flags; + uint64_t page_size =3D qemu_real_host_page_size(); + + if (!memory_region_is_ram(area)) { + if (writable) { + return; + } else if (!memory_region_is_romd(area)) { + /* + * If the memory device is not in romd_mode, then we actually = want + * to remove the whpx memory slot so all accesses will trap. + */ + add =3D false; + } + } =20 - if (!memory_region_is_ram(mr)) { - return; + if (!QEMU_IS_ALIGNED(int128_get64(section->size), page_size) || + !QEMU_IS_ALIGNED(section->offset_within_address_space, page_size))= { + /* Not page aligned, so we can not map as RAM */ + add =3D false; } =20 - delta =3D qemu_real_host_page_size() - (start_pa & ~qemu_real_host_pag= e_mask()); - delta &=3D ~qemu_real_host_page_mask(); - if (delta > size) { - return; + mem =3D whpx_find_overlap_slot( + section->offset_within_address_space, + int128_get64(section->size)); + + if (mem && add) { + if (mem->size =3D=3D int128_get64(section->size) && + mem->start =3D=3D section->offset_within_address_space && + mem->mem =3D=3D (memory_region_get_ram_ptr(area) + + section->offset_within_region)) { + return; /* Same region was attempted to register, go away. */ + } + } + + /* Region needs to be reset. set the size to 0 and remap it. */ + if (mem) { + mem->size =3D 0; + if (do_whpx_set_memory(mem, 0)) { + error_report("Failed to reset overlapping slot"); + abort(); + } } - start_pa +=3D delta; - size -=3D delta; - size &=3D qemu_real_host_page_mask(); - if (!size || (start_pa & ~qemu_real_host_page_mask())) { + + if (!add) { return; } =20 - host_va =3D (uintptr_t)memory_region_get_ram_ptr(mr) - + section->offset_within_region + delta; + if (area->readonly || + (!memory_region_is_ram(area) && memory_region_is_romd(area))) { + flags =3D WHvMapGpaRangeFlagRead | WHvMapGpaRangeFlagExecute; + } else { + flags =3D WHvMapGpaRangeFlagRead | WHvMapGpaRangeFlagWrite + | WHvMapGpaRangeFlagExecute; + } + + /* Now make a new slot. */ + int x; + + for (x =3D 0; x < whpx_state->num_slots; ++x) { + mem =3D &whpx_state->slots[x]; + if (!mem->size) { + break; + } + } + + if (x =3D=3D whpx_state->num_slots) { + error_report("No free slots"); + abort(); + } =20 - whpx_update_mapping(start_pa, size, (void *)(uintptr_t)host_va, add, - memory_region_is_rom(mr), mr->name); + mem->size =3D int128_get64(section->size); + mem->mem =3D memory_region_get_ram_ptr(area) + section->offset_within_= region; + mem->start =3D section->offset_within_address_space; + mem->region =3D area; + + if (do_whpx_set_memory(mem, flags)) { + error_report("Error registering new memory slot"); + abort(); + } } =20 static void whpx_region_add(MemoryListener *listener, MemoryRegionSection *section) { - memory_region_ref(section->mr); - whpx_process_section(section, 1); + whpx_set_phys_mem(section, true); } =20 static void whpx_region_del(MemoryListener *listener, MemoryRegionSection *section) { - whpx_process_section(section, 0); - memory_region_unref(section->mr); + whpx_set_phys_mem(section, false); } =20 static void whpx_transaction_begin(MemoryListener *listener) @@ -524,6 +609,14 @@ static void whpx_accel_instance_init(Object *obj) memset(whpx, 0, sizeof(struct whpx_state)); /* Turn on kernel-irqchip, by default */ whpx->kernel_irqchip_allowed =3D true; + + int x; + whpx_state =3D malloc(sizeof(WHPXState)); + whpx_state->num_slots =3D ARRAY_SIZE(whpx_state->slots); + for (x =3D 0; x < whpx_state->num_slots; ++x) { + whpx_state->slots[x].size =3D 0; + whpx_state->slots[x].slot_id =3D x; + } } =20 static const TypeInfo whpx_accel_type =3D { --=20 2.50.1 (Apple Git-155)