From: Alistair Popple <alistair@popple.id.au>
To: linuxppc-dev@lists.ozlabs.org
Cc: mikey@neuling.org, npiggin@gmail.com, aneesh.kumar@linux.ibm.com,
Alistair Popple <alistair@popple.id.au>
Subject: [PATCH v2 3/7] powerpc/dt_cpu_ftrs: Advertise support for ISA v3.1 if selected
Date: Tue, 19 May 2020 10:31:53 +1000 [thread overview]
Message-ID: <20200519003157.31946-4-alistair@popple.id.au> (raw)
In-Reply-To: <20200519003157.31946-1-alistair@popple.id.au>
On powernv hardware support for ISAv3.1 is advertised via a cpu feature
bit in the device tree. This patch enables the associated HWCAP bit if
the device tree indicates ISAv3.1 is available.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
---
arch/powerpc/kernel/dt_cpu_ftrs.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 36bc0d5c4f3a..b5e21264d168 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -26,6 +26,7 @@
/* Device-tree visible constants follow */
#define ISA_V2_07B 2070
#define ISA_V3_0B 3000
+#define ISA_V3_1 3100
#define USABLE_PR (1U << 0)
#define USABLE_OS (1U << 1)
@@ -654,6 +655,11 @@ static void __init cpufeatures_setup_start(u32 isa)
cur_cpu_spec->cpu_features |= CPU_FTR_ARCH_300;
cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_ARCH_3_00;
}
+
+ if (isa >= 3100) {
+ cur_cpu_spec->cpu_features |= CPU_FTR_ARCH_31;
+ cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_ARCH_3_1;
+ }
}
static bool __init cpufeatures_process_feature(struct dt_cpu_feature *f)
--
2.20.1
next prev parent reply other threads:[~2020-05-19 0:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 0:31 [PATCH v2 0/7] Base support for POWER10 Alistair Popple
2020-05-19 0:31 ` [PATCH v2 1/7] powerpc: Add new HWCAP bits Alistair Popple
2020-05-19 3:20 ` Michael Neuling
2020-05-19 17:48 ` Paul A. Clarke
2020-05-20 2:42 ` Michael Ellerman
2020-05-20 3:29 ` Alistair Popple
2020-05-19 0:31 ` [PATCH v2 2/7] powerpc: Add support for ISA v3.1 Alistair Popple
2020-05-19 4:04 ` Jordan Niethe
2020-05-19 5:45 ` Alistair Popple
2020-05-19 0:31 ` Alistair Popple [this message]
2020-05-19 0:31 ` [PATCH v2 4/7] powerpc/dt_cpu_ftrs: Set current thread fscr bits Alistair Popple
2020-05-19 0:31 ` [PATCH v2 5/7] powerpc/dt_cpu_ftrs: Enable Prefixed Instructions Alistair Popple
2020-05-19 0:31 ` [PATCH v2 6/7] powerpc/dt_cpu_ftrs: Add MMA feature Alistair Popple
2020-05-19 14:49 ` Paul A. Clarke
2020-05-19 15:05 ` Segher Boessenkool
2020-05-19 15:22 ` Paul A. Clarke
2020-05-19 15:28 ` Segher Boessenkool
2020-05-19 15:49 ` Paul A. Clarke
2020-05-19 17:51 ` Paul A. Clarke
2020-05-19 23:56 ` Alistair Popple
2020-05-19 0:31 ` [PATCH v2 7/7] powerpc: Add POWER10 architected mode Alistair Popple
2020-05-19 3:58 ` Jordan Niethe
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