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Sun, 26 May 2024 20:14:38 -0700 (PDT) Received: from MacBook-Pro-2.local.bytedance.net ([203.208.167.151]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-6f8fbd3dd5dsm4035662b3a.42.2024.05.26.20.14.35 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 26 May 2024 20:14:38 -0700 (PDT) From: Chuang Xu To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, xieyongji@bytedance.com, Chuang Xu , Guixiong Wei , Yipeng Yin Subject: [PATCH] x86: cpu: fixup number of addressable IDs for processor cores in the physical package Date: Mon, 27 May 2024 11:13:33 +0800 Message-Id: <20240527031333.85932-1-xuchuangxclwt@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::c2a; envelope-from=xuchuangxclwt@bytedance.com; helo=mail-oo1-xc2a.google.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 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, FROM_LOCAL_NOVOWEL=0.5, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org When QEMU is started with: -cpu host,host-cache-info=on,l3-cache=off \ -smp 2,sockets=1,dies=1,cores=1,threads=2 Guest can't acquire maximum number of addressable IDs for processor cores in the physical package from CPUID[04H]. This bug was introduced in commit d7caf13b5fcf742e5680c1d3448ba070fc811644. Fix it by changing the judgement condition to a >= 1. Signed-off-by: Chuang Xu Signed-off-by: Guixiong Wei Signed-off-by: Yipeng Yin --- target/i386/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index cd16cb893d..0369c01153 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6097,7 +6097,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, if (*eax & 31) { int host_vcpus_per_cache = 1 + ((*eax & 0x3FFC000) >> 14); int vcpus_per_socket = cs->nr_cores * cs->nr_threads; - if (cs->nr_cores > 1) { + if (cs->nr_cores >= 1) { *eax &= ~0xFC000000; *eax |= (pow2ceil(cs->nr_cores) - 1) << 26; }