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Wed, 10 Jun 2026 19:24:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 366A51F00893; Wed, 10 Jun 2026 19:24:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781119474; bh=9lUhq3R1Dm6FCc4eb2IfRUPV7mIMmhVgKbhBVBBBxrU=; h=From:To:Cc:Subject:Date; b=WQ1htMc2OuJzYHybPgu7a/neRsLY84k5Inzhh4iN8g9PFrMCqd0XzkQGDzAA5FK6Z rXQo6ZGw1SUGtRmy8d3Fw3YPtyqf1SvhA3ndNOOYLK05Xf8X8nTYh2EzftKMuOzhbo zTu9d3hVn7E7KmGsg461mRF6/+1OCsYehgWY7jchkUsBVzGZthb1AWAEERp9/+9JDM 990vVwLxuKXk1WUqhRn8kE/XnccOXqGfquOudsFOXV2MfR2D/tYoL9PS0h2ic3FFsO yJkHHEa/7zkAL7Eah+iyU9vuTr3KhleJbfWyD54Uog0pRgtyszoygYfaKEvf6xUycU /bmcrD+y8iVCA== From: Helge Deller To: qemu-devel@nongnu.org Cc: Helge Deller , qemu-ppc@nongnu.org, Richard Henderson Subject: [PATCH v3] linux-user: Implement /proc/cpuinfo for ppc cpus Date: Wed, 10 Jun 2026 21:24:16 +0200 Message-ID: <20260610192424.12031-1-deller@kernel.org> X-Mailer: git-send-email 2.54.0 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=lists1p.gnu.org; Received-SPF: pass client-ip=2600:3c04:e001:324:0:1991:8:25; envelope-from=deller@kernel.org; helo=tor.source.kernel.org 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=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=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: qemu development 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 @kernel.org) X-ZM-MESSAGEID: 1781119492083154100 Content-Type: text/plain; charset="utf-8" From: Helge Deller I've tried to mimic what I've seen on two debian porterboxes (ppc64 and ppc64le), which are running via KVM/QEMU. v3: drop another colon, indenting fixes v2: drop colon, add clock output, refine pvr calculation Signed-off-by: Helge Deller Cc: qemu-ppc@nongnu.org Cc: Richard Henderson --- linux-user/ppc/target_proc.h | 91 +++++++++++++++++++++++++++++++++++- 1 file changed, 90 insertions(+), 1 deletion(-) diff --git a/linux-user/ppc/target_proc.h b/linux-user/ppc/target_proc.h index 43fe29ca72..952e3c3090 100644 --- a/linux-user/ppc/target_proc.h +++ b/linux-user/ppc/target_proc.h @@ -1 +1,90 @@ -/* No target-specific /proc support */ +/* + * ppc specific proc functions for linux-user + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#ifndef PPC_TARGET_PROC_H +#define PPC_TARGET_PROC_H + +#include + +#define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */ +#define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */ +#define PVR_MAJ(pvr) (((pvr) >> 4) & 0xF) /* Major revision field */ +#define PVR_MIN(pvr) (((pvr) >> 0) & 0xF) /* Minor revision field */ + +static int open_cpuinfo(CPUArchState *cpu_env, int fd) +{ + struct timespec res; + double freq_mhz; + int i, num_cpus; + unsigned int maj, min, pvr; + + PowerPCCPUClass *pcc =3D POWERPC_CPU_GET_CLASS(env_cpu(cpu_env)); + DeviceClass *dc =3D DEVICE_CLASS(ppc_cpu_get_family_class(pcc)); + + pvr =3D pcc->pvr; + + /* Taken from Linux kernel: */ + /* If we are a Freescale core do a simple check so + * we don't have to keep adding cases in the future */ + if (PVR_VER(pvr) & 0x8000) { + switch (PVR_VER(pvr)) { + case 0x8000: /* 7441/7450/7451, Voyager */ + case 0x8001: /* 7445/7455, Apollo 6 */ + case 0x8002: /* 7447/7457, Apollo 7 */ + case 0x8003: /* 7447A, Apollo 7 PM */ + case 0x8004: /* 7448, Apollo 8 */ + case 0x800c: /* 7410, Nitro */ + maj =3D ((pvr >> 8) & 0xF); + min =3D PVR_MIN(pvr); + break; + default: /* e500/book-e */ + maj =3D PVR_MAJ(pvr); + min =3D PVR_MIN(pvr); + break; + } + } else { + switch (PVR_VER(pvr)) { + case 0x1008: /* 740P/750P ?? */ + maj =3D ((pvr >> 8) & 0xFF) - 1; + min =3D pvr & 0xFF; + break; + case 0x004e: /* POWER9 bits 12-15 give chip type */ + case 0x0080: /* POWER10 bit 12 gives SMT8/4 */ + maj =3D (pvr >> 8) & 0x0F; + min =3D pvr & 0xFF; + break; + default: + maj =3D (pvr >> 8) & 0xFF; + min =3D pvr & 0xFF; + break; + } + } + + if (clock_getres(CLOCK_REALTIME, &res) =3D=3D -1) { + res.tv_nsec =3D 1; + } + freq_mhz =3D 1000.0 / res.tv_nsec; + + num_cpus =3D sysconf(_SC_NPROCESSORS_ONLN); + for (i =3D 0; i < num_cpus; i++) { + dprintf(fd, "processor\t: %d\n", i); + dprintf(fd, "cpu\t\t: %s%s\n", + dc->desc, + pcc->insns_flags & PPC_ALTIVEC ? ", altivec supported"= :""); + dprintf(fd, "clock\t\t: %.3fMHz\n", freq_mhz); + dprintf(fd, "revision\t: %d.%d (pvr %04x %04x)\n\n", + maj, min, PVR_VER(pvr), PVR_REV(pvr)); + } + + dprintf(fd, "timebase\t: 512000000\n"); + dprintf(fd, "platform\t: pSeries\n"); + dprintf(fd, "model\t\t: IBM pSeries (QEMU user v" QEMU_VERSION ")\n"); + dprintf(fd, "machine\t\t: CHRP IBM pSeries\n"); + + return 0; +} +#define HAVE_ARCH_PROC_CPUINFO + +#endif /* PPC_TARGET_PROC_H */ --=20 2.54.0