The following commit has been merged into the x86/platform branch of tip: Commit-ID: f5a8f0ecb436a15f50215f27ab70a2e8626a6135 Gitweb: https://git.kernel.org/tip/f5a8f0ecb436a15f50215f27ab70a2e8626a6135 Author: Mike Travis <mike.travis@xxxxxxx> AuthorDate: Tue, 10 Sep 2019 09:58:45 -05:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Mon, 07 Oct 2019 13:42:11 +02:00 x86/platform/uv: Decode UVsystab Info Decode the hubless UVsystab passed from BIOS to the kernel saving pertinent info in a similar manner that hubbed UVsystabs are decoded. Signed-off-by: Mike Travis <mike.travis@xxxxxxx> Reviewed-by: Steve Wahl <steve.wahl@xxxxxxx> Reviewed-by: Dimitri Sivanich <dimitri.sivanich@xxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Hedi Berriche <hedi.berriche@xxxxxxx> Cc: Justin Ernst <justin.ernst@xxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Russ Anderson <russ.anderson@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/20190910145840.135325066@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/apic/x2apic_uv_x.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index b505905..ec940ad 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -1303,7 +1303,8 @@ static int __init decode_uv_systab(void) struct uv_systab *st; int i; - if (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE) + /* If system is uv3 or lower, there is no extended UVsystab */ + if (is_uv_hubbed(0xfffffe) < uv(4) && is_uv_hubless(0xfffffe) < uv(4)) return 0; /* No extended UVsystab required */ st = uv_systab; @@ -1554,8 +1555,15 @@ static __init int uv_system_init_hubless(void) /* Init kernel/BIOS interface */ rc = uv_bios_init(); + if (rc < 0) + return rc; - /* Create user access node if UVsystab available */ + /* Process UVsystab */ + rc = decode_uv_systab(); + if (rc < 0) + return rc; + + /* Create user access node */ if (rc >= 0) uv_setup_proc_files(1);
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