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Peter Anvin" , Andrew Morton , Borislav Petkov , Christoph Hellwig Cc: Dimitri Sivanich , Russ Anderson , Hedi Berriche , Steve Wahl , Justin Ernst , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/8] x86/platform/uv: Save OEM_ID from ACPI MADT probe Content-Disposition: inline; filename=save-oem_id X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.70,1.0.8 definitions=2019-09-10_10:2019-09-10,2019-09-10 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=765 mlxscore=0 malwarescore=0 suspectscore=0 bulkscore=0 clxscore=1015 impostorscore=0 phishscore=0 spamscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1906280000 definitions=main-1909100141 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Save the OEM_ID and OEM_TABLE_ID passed to the apic driver probe function for later use. Also, convert the char list arg passed from the kernel to a true null-terminated string. Signed-off-by: Mike Travis Reviewed-by: Steve Wahl Reviewed-by: Dimitri Sivanich --- arch/x86/kernel/apic/x2apic_uv_x.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) --- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c +++ linux/arch/x86/kernel/apic/x2apic_uv_x.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -31,6 +32,10 @@ static u64 gru_dist_base, gru_first_no static u64 gru_dist_lmask, gru_dist_umask; static union uvh_apicid uvh_apicid; +/* Unpack OEM/TABLE ID's to be NULL terminated strings */ +static u8 oem_id[ACPI_OEM_ID_SIZE + 1]; +static u8 oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1]; + /* Information derived from CPUID: */ static struct { unsigned int apicid_shift; @@ -248,11 +253,20 @@ static void __init uv_set_apicid_hibit(v } } -static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +static void __init uv_stringify(int len, char *to, char *from) +{ + /* Relies on 'to' being NULL chars so result will be NULL terminated */ + strncpy(to, from, len-1); +} + +static int __init uv_acpi_madt_oem_check(char *_oem_id, char *_oem_table_id) { int pnodeid; int uv_apic; + uv_stringify(sizeof(oem_id), oem_id, _oem_id); + uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id); + if (strncmp(oem_id, "SGI", 3) != 0) { if (strncmp(oem_id, "NSGI", 4) == 0) { uv_hubless_system = true; --