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authorLinus Torvalds <torvalds@linux-foundation.org>2022-06-17 13:45:47 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2022-06-17 13:45:47 -0500
commitf10516322ddab90e2d9b21990d8c8787c2236b26 (patch)
treec1befc90f0b5af2eaf4cd891f904a043a10cd1c7
parent2d806a688f98a36792e108ca8583712ee235f815 (diff)
parentc836d9d17a7d102ded1ba4dbd4ee0bc42ba26211 (diff)
Merge tag 'riscv-for-linus-5.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt: - A fix for the PolarFire SOC's device tree - A handful of fixes for the recently added Svpmbt support - An improvement to the Kconfig text for Svpbmt * tag 'riscv-for-linus-5.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: Improve description for RISCV_ISA_SVPBMT Kconfig symbol riscv: drop cpufeature_apply_feature tracking variable riscv: fix dependency for t-head errata riscv: dts: microchip: re-add pdma to mpfs device tree
-rw-r--r--arch/riscv/Kconfig9
-rw-r--r--arch/riscv/Kconfig.erratas1
-rw-r--r--arch/riscv/boot/dts/microchip/mpfs.dtsi9
-rw-r--r--arch/riscv/kernel/cpufeature.c5
4 files changed, 18 insertions, 6 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index c22f58155948..32ffef9f6e5b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -364,8 +364,13 @@ config RISCV_ISA_SVPBMT
select RISCV_ALTERNATIVE
default y
help
- Adds support to dynamically detect the presence of the SVPBMT extension
- (Supervisor-mode: page-based memory types) and enable its usage.
+ Adds support to dynamically detect the presence of the SVPBMT
+ ISA-extension (Supervisor-mode: page-based memory types) and
+ enable its usage.
+
+ The memory type for a page contains a combination of attributes
+ that indicate the cacheability, idempotency, and ordering
+ properties for access to that page.
The SVPBMT extension is only available on 64Bit cpus.
diff --git a/arch/riscv/Kconfig.erratas b/arch/riscv/Kconfig.erratas
index ebfcd5cc6eaf..457ac72c9b36 100644
--- a/arch/riscv/Kconfig.erratas
+++ b/arch/riscv/Kconfig.erratas
@@ -35,6 +35,7 @@ config ERRATA_SIFIVE_CIP_1200
config ERRATA_THEAD
bool "T-HEAD errata"
+ depends on !XIP_KERNEL
select RISCV_ALTERNATIVE
help
All T-HEAD errata Kconfig depend on this Kconfig. Disabling
diff --git a/arch/riscv/boot/dts/microchip/mpfs.dtsi b/arch/riscv/boot/dts/microchip/mpfs.dtsi
index 8c3259134194..3095d08453a1 100644
--- a/arch/riscv/boot/dts/microchip/mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs.dtsi
@@ -192,6 +192,15 @@
riscv,ndev = <186>;
};
+ pdma: dma-controller@3000000 {
+ compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";
+ reg = <0x0 0x3000000 0x0 0x8000>;
+ interrupt-parent = <&plic>;
+ interrupts = <5 6>, <7 8>, <9 10>, <11 12>;
+ dma-channels = <4>;
+ #dma-cells = <1>;
+ };
+
clkcfg: clkcfg@20002000 {
compatible = "microchip,mpfs-clkcfg";
reg = <0x0 0x20002000 0x0 0x1000>, <0x0 0x3E001000 0x0 0x1000>;
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index a6f62a6d1edd..12b05ce164bb 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -293,7 +293,6 @@ void __init_or_module riscv_cpufeature_patch_func(struct alt_entry *begin,
unsigned int stage)
{
u32 cpu_req_feature = cpufeature_probe(stage);
- u32 cpu_apply_feature = 0;
struct alt_entry *alt;
u32 tmp;
@@ -307,10 +306,8 @@ void __init_or_module riscv_cpufeature_patch_func(struct alt_entry *begin,
}
tmp = (1U << alt->errata_id);
- if (cpu_req_feature & tmp) {
+ if (cpu_req_feature & tmp)
patch_text_nosync(alt->old_ptr, alt->alt_ptr, alt->alt_len);
- cpu_apply_feature |= tmp;
- }
}
}
#endif