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20:DjrEBkOkKydIIBOFOMxwu5ybIIVWKAaORhMugCYdtZvZF9R1ssP5t/di/POtwH087PONVWEBy4IXegCk+T26omW6CCDJ7W7s6sFAhO0MDgMzVXGitiwExUO6Pdy52ymU7w2DSP64w3BVCR/Pt/d8vrZwjYFOgoKtuy1RClGbNdWV+x/O1bilY+hnt+adOIMVyWZC+KXfXs+xy2hUcCVZHS3uDbC2cPFr9d/1ebh/UtwGdxoFotY17pEThJf5SmX1 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jun 2018 01:18:42.2225 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 001475be-111a-4810-c99d-08d5d194c48a X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB2480 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 40.107.70.47 Subject: [Qemu-devel] [PATCH v14 4/6] cpus: Add new function topology_supports_topoext X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: geoff@hostfission.com, babu.moger@amd.com, kash@tripleback.net, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add new function topology_supports_topoext to verify if we can support topoext feature. Will be used to enable/disable topoext feature. Signed-off-by: Babu Moger --- accel/tcg/user-exec-stub.c | 5 +++++ cpus.c | 13 +++++++++++++ include/qom/cpu.h | 9 +++++++++ 3 files changed, 27 insertions(+) diff --git a/accel/tcg/user-exec-stub.c b/accel/tcg/user-exec-stub.c index dbcf1ad..715818a 100644 --- a/accel/tcg/user-exec-stub.c +++ b/accel/tcg/user-exec-stub.c @@ -11,6 +11,11 @@ void qemu_init_vcpu(CPUState *cpu) { } +int topology_supports_topoext(int max_cores, int max_threads) +{ + return true; +} + /* User mode emulation does not support record/replay yet. */ bool replay_exception(void) diff --git a/cpus.c b/cpus.c index d1f1629..17f6f4c 100644 --- a/cpus.c +++ b/cpus.c @@ -1979,6 +1979,19 @@ static void qemu_dummy_start_vcpu(CPUState *cpu) QEMU_THREAD_JOINABLE); } +/* + * Check if we can support topoext feature with this topology + * Fail if number of cores are beyond the supported cores + * or number of threads are more than supported threads + */ +int topology_supports_topoext(int max_cores, int max_threads) +{ + if ((smp_cores > max_cores) || (smp_threads > max_threads)) { + return false; + } + return true; +} + void qemu_init_vcpu(CPUState *cpu) { cpu->nr_cores = smp_cores; diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 9d3afc6..4ac4d49 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -1004,6 +1004,15 @@ void end_exclusive(void); */ void qemu_init_vcpu(CPUState *cpu); +/** + * topology_supports_topoext: + * @max_cores: Max cores topoext feature can support + * @max_threads: Max threads topoext feature can support + * + * Return true if topology can be supported else return false + */ +int topology_supports_topoext(int max_cores, int max_threads); + #define SSTEP_ENABLE 0x1 /* Enable simulated HW single stepping */ #define SSTEP_NOIRQ 0x2 /* Do not use IRQ while single stepping */ #define SSTEP_NOTIMER 0x4 /* Do not Timers while single stepping */