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riscv: Introduce vendor variants of extension helpers

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Vendor extensions are maintained in per-vendor structs (separate from
standard extensions which live in riscv_isa). Create vendor variants for
the existing extension helpers to interface with the riscv_isa_vendor
bitmaps.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Andy Chiu <andy.chiu@sifive.com>
Link: https://lore.kernel.org/r/20240719-support_vendor_extensions-v3-3-0af7587bbec0@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Charlie Jenkins 2024-07-19 09:15:20 -07:00 committed by Palmer Dabbelt
parent 9448d9accd
commit 0f24254111
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
2 changed files with 85 additions and 1 deletions
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83
arch/riscv/include/asm/vendor_extensions.h
View File

@ -42,8 +42,91 @@ extern const size_t riscv_isa_vendor_ext_list_size;
#define VENDOR_EXT_ALL_CPUS -1
bool __riscv_isa_vendor_extension_available(int cpu, unsigned long vendor, unsigned int bit);
#define riscv_cpu_isa_vendor_extension_available(cpu, vendor, ext) \
__riscv_isa_vendor_extension_available(cpu, vendor, RISCV_ISA_VENDOR_EXT_##ext)
#define riscv_isa_vendor_extension_available(vendor, ext) \
__riscv_isa_vendor_extension_available(VENDOR_EXT_ALL_CPUS, vendor, \
RISCV_ISA_VENDOR_EXT_##ext)
static __always_inline bool __riscv_has_extension_likely(const unsigned long vendor,
const unsigned long ext)
{
asm goto(ALTERNATIVE("j %l[l_no]", "nop", %[vendor], %[ext], 1)
:
: [vendor] "i" (vendor), [ext] "i" (ext)
:
: l_no);
return true;
l_no:
return false;
}
static __always_inline bool __riscv_has_extension_unlikely(const unsigned long vendor,
const unsigned long ext)
{
asm goto(ALTERNATIVE("nop", "j %l[l_yes]", %[vendor], %[ext], 1)
:
: [vendor] "i" (vendor), [ext] "i" (ext)
:
: l_yes);
return false;
l_yes:
return true;
}
static __always_inline bool riscv_has_vendor_extension_likely(const unsigned long vendor,
const unsigned long ext)
{
if (!IS_ENABLED(CONFIG_RISCV_ISA_VENDOR_EXT))
return false;
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE))
return __riscv_has_extension_likely(vendor,
ext + RISCV_VENDOR_EXT_ALTERNATIVES_BASE);
return __riscv_isa_vendor_extension_available(VENDOR_EXT_ALL_CPUS, vendor, ext);
}
static __always_inline bool riscv_has_vendor_extension_unlikely(const unsigned long vendor,
const unsigned long ext)
{
if (!IS_ENABLED(CONFIG_RISCV_ISA_VENDOR_EXT))
return false;
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE))
return __riscv_has_extension_unlikely(vendor,
ext + RISCV_VENDOR_EXT_ALTERNATIVES_BASE);
return __riscv_isa_vendor_extension_available(VENDOR_EXT_ALL_CPUS, vendor, ext);
}
static __always_inline bool riscv_cpu_has_vendor_extension_likely(const unsigned long vendor,
int cpu, const unsigned long ext)
{
if (!IS_ENABLED(CONFIG_RISCV_ISA_VENDOR_EXT))
return false;
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE) &&
__riscv_has_extension_likely(vendor, ext + RISCV_VENDOR_EXT_ALTERNATIVES_BASE))
return true;
return __riscv_isa_vendor_extension_available(cpu, vendor, ext);
}
static __always_inline bool riscv_cpu_has_vendor_extension_unlikely(const unsigned long vendor,
int cpu,
const unsigned long ext)
{
if (!IS_ENABLED(CONFIG_RISCV_ISA_VENDOR_EXT))
return false;
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE) &&
__riscv_has_extension_unlikely(vendor, ext + RISCV_VENDOR_EXT_ALTERNATIVES_BASE))
return true;
return __riscv_isa_vendor_extension_available(cpu, vendor, ext);
}
#endif /* _ASM_VENDOR_EXTENSIONS_H */

3
drivers/perf/riscv_pmu_sbi.c
View File

@ -1064,7 +1064,8 @@ static int pmu_sbi_setup_irqs(struct riscv_pmu *pmu, struct platform_device *pde
riscv_cached_mimpid(0) == 0) {
riscv_pmu_irq_num = THEAD_C9XX_RV_IRQ_PMU;
riscv_pmu_use_irq = true;
} else if (riscv_isa_vendor_extension_available(ANDES_VENDOR_ID, XANDESPMU) &&
} else if (riscv_has_vendor_extension_unlikely(ANDES_VENDOR_ID,
RISCV_ISA_VENDOR_EXT_XANDESPMU) &&
IS_ENABLED(CONFIG_ANDES_CUSTOM_PMU)) {
riscv_pmu_irq_num = ANDES_SLI_CAUSE_BASE + ANDES_RV_IRQ_PMOVI;
riscv_pmu_use_irq = true;