From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 513CDD58B08 for ; Sun, 15 Mar 2026 03:42:27 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w1cMi-0004xT-HT; Sat, 14 Mar 2026 23:42:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w1cMg-0004wQ-Fb for qemu-arm@nongnu.org; Sat, 14 Mar 2026 23:42:06 -0400 Received: from mail-dy1-x132e.google.com ([2607:f8b0:4864:20::132e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1w1cMe-0003l2-Ew for qemu-arm@nongnu.org; Sat, 14 Mar 2026 23:42:06 -0400 Received: by mail-dy1-x132e.google.com with SMTP id 5a478bee46e88-2beab594d8eso3930452eec.0 for ; Sat, 14 Mar 2026 20:42:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773546123; x=1774150923; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=i/DK28lXQIwOLzrB1K190uj9fo4wlA326bvO6/LGKYk=; b=a/+Fw+nRp4LfGN0l7Pood0qrrlybkxz1isOco0wIVEDDO14p25EBZnYEzrOCgdmGvH g7NDjJkAPKf1dvJ3xPj0tDS8jHrKLgzhyM6OjnkhKLzmmCs18dw7izHI7/cfD9/er2R9 8raXW6sIqC7UCjTK80Je+Z3GnteEon63W5fRJ68k3FVKCTnffLgxZppb/saPsArexSzL eGSWNZUA7smX4L0hHRPK4EYY2hz2PVKrZzW8toy9jc9NVlUhdjYJ2NB7DuH607yJasiQ JkNqcjMMANeAkdBh10RINZ4i64irP7lm5PiispbaAbLaWVCbUlYu05FlaQIZSQpf/Fq9 TboQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773546123; x=1774150923; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=i/DK28lXQIwOLzrB1K190uj9fo4wlA326bvO6/LGKYk=; b=dr5LPtttLr01Z+tbburtYc18xR+3xnrqeXIpeuTpryjDkT3BYX+nfw2gT5q9tBmHlX vjrNBGui/TcaaHsvaE/KA9NUeT2Z8DP26lVs9YR8w/rPgpfYllUwiw0HIsziPkQGTDgV XCL7bda2wAZP6AOtUiXRm+CVQv9tswKV65RjGP9rWzChHGGVsOk1sT6wzOs2CTRkL45S 8KNaUFLWBbeMk2vwhFaJcU/aliKkd4fKOFMQLl/YIlsGhFYMM+JDrPsjqdQUZACELIB5 xWK8WSiTeQm3JQN8LUX6YVT+wpi1g15KElJskU60Mz8GuRiGd7QQ3iHHebv8X5bsAIn5 VZgg== X-Gm-Message-State: AOJu0YzVv/qJaddV3wsdf1e9JKIIXL4XGxDArVznLduexMWswGWOsT7+ USD0NeeWjAahNrg5/Pm0bGIqDtTHzJq3J1Mx3NcLIV5n4fRA4HwsnNHvVOI6g0AU X-Gm-Gg: ATEYQzx6qYFw/aBcA8VehTvuoiEQsQDHZ0s4F5FwUqhvpCHui0gSo43F8wFzuXIV9h/ cXK3xGFGqupbZ4Le6UmkQnjkR9p0GWe5lBx+Xafs7XwLoB8SDG1MpVLLgX5SMgk5DN+bdLLK3LE sAmN9qP2OxWYNsZmLJ1JR+YJAhKiOBsUMwfO10GDtAvDga/heZ0d6XIbnXRd0Vp+AeDMjLCwdy0 jcv3/gxuLxUQc7dZNJsxfvWSagsDb9PhDerYrCMY0tOL/k+wNtri4dqWBelP4PQf5DI4wCeg+6Y vmO5KAiy+F8OIOheEwR506+GKmd7HhfxLVZGn7lFHIofzcGNwAWgquW8SQGfk40r9ons4AN199L SxhMKIWTTSzvWFh5QnuS+oHLMfACnkI57zyf9Cu/qfj7vhvoj1WF1bFd245lVk75US7qLBn50WO l4+iD1iJqYyxKhUNvAQrzqln+xZoUKCqC7TUdkAvw= X-Received: by 2002:a05:7301:d8c:b0:2b9:80c1:bb5 with SMTP id 5a478bee46e88-2bea572a4aemr4005010eec.33.1773546122981; Sat, 14 Mar 2026 20:42:02 -0700 (PDT) Received: from 192.168.7.2 ([189.6.247.75]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2beab57b2b2sm8862982eec.33.2026.03.14.20.42.00 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sat, 14 Mar 2026 20:42:02 -0700 (PDT) From: Lucas Amaral To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Lucas Amaral , Lucas Amaral Subject: [PATCH 2/3] accel/hvf: introduce map granule abstraction and IPA property Date: Sun, 15 Mar 2026 00:41:53 -0300 Message-ID: <20260315034154.41986-3-lucaaamaral@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260315034154.41986-1-lucaaamaral@gmail.com> References: <20260311022732.64141-1-lucaaamaral@gmail.com> <20260315034154.41986-1-lucaaamaral@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::132e; envelope-from=lucaaamaral@gmail.com; helo=mail-dy1-x132e.google.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, FREEMAIL_FROM=0.001, FSL_HELO_BARE_IP_2=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Add a map granule abstraction that decouples HVF memory mapping alignment from the host page size. On ARM64, Apple Silicon supports stage-2 translation with 4KB page granules regardless of the host OS page size (16KB on macOS). This allows running guests with 4KB pages without interior mapping failures. Introduce hvf_set_map_granule()/hvf_get_map_granule() in hvf-all.c to replace hard-coded qemu_real_host_page_size() references in do_hv_vm_protect() and hvf_set_phys_mem(). When the granule is not explicitly configured, fall back to host page size to preserve the previous behaviour. Add an "ipa-granule" accelerator property (auto, 4k, 16k) following the established kvm_arch_accel_class_init() pattern: ARM registers the property in hvf_arch_accel_class_init(), x86 provides an empty stub. This avoids #ifdef __aarch64__ in common code while keeping a single hvf-all.c shared by both targets. Fix hvf_set_phys_mem() to return early for non-aligned regions instead of clearing the add flag, which previously fell through to an incorrect unmap of a region that was never mapped. Signed-off-by: Lucas Amaral --- accel/hvf/hvf-all.c | 30 +++++++++++++++++++++++++++--- include/system/hvf.h | 15 +++++++++++++++ include/system/hvf_int.h | 2 ++ target/arm/hvf/hvf.c | 40 ++++++++++++++++++++++++++++++++++++++++ target/i386/hvf/hvf.c | 4 ++++ 5 files changed, 88 insertions(+), 3 deletions(-) diff --git a/accel/hvf/hvf-all.c b/accel/hvf/hvf-all.c index 5f357c6d..d745fefd 100644 --- a/accel/hvf/hvf-all.c +++ b/accel/hvf/hvf-all.c @@ -10,6 +10,8 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qemu/units.h" +#include "qapi/error.h" #include "accel/accel-ops.h" #include "exec/cpu-common.h" #include "system/address-spaces.h" @@ -22,6 +24,21 @@ bool hvf_allowed; +static uint64_t hvf_map_granule; + +void hvf_set_map_granule(uint64_t size) +{ + hvf_map_granule = size; +} + +uint64_t hvf_get_map_granule(void) +{ + if (!hvf_map_granule) { + return qemu_real_host_page_size(); + } + return hvf_map_granule; +} + const char *hvf_return_string(hv_return_t ret) { switch (ret) { @@ -53,7 +70,7 @@ void assert_hvf_ok_impl(hv_return_t ret, const char *file, unsigned int line, static void do_hv_vm_protect(hwaddr start, size_t size, hv_memory_flags_t flags) { - intptr_t page_mask = qemu_real_host_page_mask(); + intptr_t page_mask = -(intptr_t)hvf_get_map_granule(); hv_return_t ret; trace_hvf_vm_protect(start, size, flags, @@ -83,7 +100,7 @@ static void hvf_set_phys_mem(MemoryRegionSection *section, bool add) MemoryRegion *area = section->mr; bool writable = !area->readonly && !area->rom_device; hv_memory_flags_t flags; - uint64_t page_size = qemu_real_host_page_size(); + uint64_t page_size = hvf_get_map_granule(); uint64_t gpa = section->offset_within_address_space; uint64_t size = int128_get64(section->size); hv_return_t ret; @@ -104,7 +121,7 @@ static void hvf_set_phys_mem(MemoryRegionSection *section, bool add) if (!QEMU_IS_ALIGNED(size, page_size) || !QEMU_IS_ALIGNED(gpa, page_size)) { /* Not page aligned, so we can not map as RAM */ - add = false; + return; } if (!add) { @@ -186,6 +203,11 @@ static int hvf_accel_init(AccelState *as, MachineState *ms) int pa_range = 36; MachineClass *mc = MACHINE_GET_CLASS(ms); + /* Resolve ipa-granule=auto → host page size */ + if (!s->ipa_granule) { + s->ipa_granule = qemu_real_host_page_size(); + } + hvf_set_map_granule(s->ipa_granule); if (mc->get_physical_address_range) { pa_range = mc->get_physical_address_range(ms, @@ -223,6 +245,8 @@ static void hvf_accel_class_init(ObjectClass *oc, const void *data) ac->init_machine = hvf_accel_init; ac->allowed = &hvf_allowed; ac->gdbstub_supported_sstep_flags = hvf_gdbstub_sstep_flags; + + hvf_arch_accel_class_init(oc); } static const TypeInfo hvf_accel_type = { diff --git a/include/system/hvf.h b/include/system/hvf.h index d3dcf088..3c4c3b89 100644 --- a/include/system/hvf.h +++ b/include/system/hvf.h @@ -36,4 +36,19 @@ typedef struct HVFState HVFState; DECLARE_INSTANCE_CHECKER(HVFState, HVF_STATE, TYPE_HVF_ACCEL) +#ifdef CONFIG_HVF_IS_POSSIBLE +/* + * Minimum alignment for hv_vm_map(). Returns the configured IPA granule + * or host page size if not set. + */ +void hvf_set_map_granule(uint64_t size); +uint64_t hvf_get_map_granule(void); +#else +static inline void hvf_set_map_granule(uint64_t size) {} +static inline uint64_t hvf_get_map_granule(void) +{ + return qemu_real_host_page_size(); +} +#endif + #endif diff --git a/include/system/hvf_int.h b/include/system/hvf_int.h index 2621164c..9589b022 100644 --- a/include/system/hvf_int.h +++ b/include/system/hvf_int.h @@ -38,6 +38,7 @@ struct HVFState { hvf_vcpu_caps *hvf_caps; uint64_t vtimer_offset; + uint32_t ipa_granule; QTAILQ_HEAD(, hvf_sw_breakpoint) hvf_sw_breakpoints; }; extern HVFState *hvf_state; @@ -57,6 +58,7 @@ void assert_hvf_ok_impl(hv_return_t ret, const char *file, unsigned int line, const char *hvf_return_string(hv_return_t ret); int hvf_arch_init(void); hv_return_t hvf_arch_vm_create(MachineState *ms, uint32_t pa_range); +void hvf_arch_accel_class_init(ObjectClass *oc); uint32_t hvf_arch_get_default_ipa_bit_size(void); uint32_t hvf_arch_get_max_ipa_bit_size(void); void hvf_kick_vcpu_thread(CPUState *cpu); diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 5fc8f6bb..1ba5bbf3 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -12,6 +12,8 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" #include "qemu/log.h" +#include "qemu/units.h" +#include "qapi/error.h" #include "system/runstate.h" #include "system/hvf.h" @@ -1218,6 +1220,44 @@ void hvf_arch_vcpu_destroy(CPUState *cpu) assert_hvf_ok(ret); } +static char *hvf_get_ipa_granule(Object *obj, Error **errp) +{ + HVFState *s = HVF_STATE(obj); + + if (s->ipa_granule == 4 * KiB) { + return g_strdup("4k"); + } + if (s->ipa_granule == 16 * KiB) { + return g_strdup("16k"); + } + return g_strdup("auto"); +} + +static void hvf_set_ipa_granule(Object *obj, const char *value, Error **errp) +{ + HVFState *s = HVF_STATE(obj); + + if (!strcmp(value, "auto")) { + s->ipa_granule = 0; + } else if (!strcmp(value, "4k")) { + s->ipa_granule = 4 * KiB; + } else if (!strcmp(value, "16k")) { + s->ipa_granule = 16 * KiB; + } else { + error_setg(errp, "invalid ipa-granule: '%s' (use auto, 4k, 16k)", + value); + } +} + +void hvf_arch_accel_class_init(ObjectClass *oc) +{ + object_class_property_add_str(oc, "ipa-granule", + hvf_get_ipa_granule, + hvf_set_ipa_granule); + object_class_property_set_description(oc, "ipa-granule", + "IPA granule for HVF stage-2 translation (auto, 4k, 16k)"); +} + hv_return_t hvf_arch_vm_create(MachineState *ms, uint32_t pa_range) { hv_return_t ret; diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c index c0d028b1..565c79b3 100644 --- a/target/i386/hvf/hvf.c +++ b/target/i386/hvf/hvf.c @@ -228,6 +228,10 @@ int hvf_arch_init(void) return 0; } +void hvf_arch_accel_class_init(ObjectClass *oc) +{ +} + /* 48-bit on all Intel Macs. Function currently unused. */ uint32_t hvf_arch_get_default_ipa_bit_size(void) { -- 2.52.0