Message ID | 20230915082701.3643-2-yongxuan.wang@sifive.com |
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State | New |
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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id f4-20020a170902ab8400b001c0af36dd64sm2912806plr.162.2023.09.15.01.27.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 01:27:18 -0700 (PDT) From: Yong-Xuan Wang <yongxuan.wang@sifive.com> To: linux-riscv@lists.infradead.org, kvm-riscv@lists.infradead.org Cc: greentime.hu@sifive.com, vincent.chen@sifive.com, tjytimi@163.com, alex@ghiti.fr, Yong-Xuan Wang <yongxuan.wang@sifive.com>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Anup Patel <apatel@ventanamicro.com>, Guo Ren <guoren@kernel.org>, Andrew Jones <ajones@ventanamicro.com>, Conor Dooley <conor.dooley@microchip.com>, wchen <waylingii@gmail.com>, Heiko Stuebner <heiko@sntech.de>, Jisheng Zhang <jszhang@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Alexandre Ghiti <alexghiti@rivosinc.com>, Kemeng Shi <shikemeng@huaweicloud.com>, David Hildenbrand <david@redhat.com>, Sergey Matyukevich <sergey.matyukevich@syntacore.com>, "Matthew Wilcox (Oracle)" <willy@infradead.org>, Charlie Jenkins <charlie@rivosinc.com>, Qinglin Pan <panqinglin2020@iscas.ac.cn>, Rick Edgecombe <rick.p.edgecombe@intel.com>, Evan Green <evan@rivosinc.com>, Sunil V L <sunilvl@ventanamicro.com>, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] RISC-V: Detect and Enable Svadu Extension Support Date: Fri, 15 Sep 2023 08:26:57 +0000 Message-Id: <20230915082701.3643-2-yongxuan.wang@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230915082701.3643-1-yongxuan.wang@sifive.com> References: <20230915082701.3643-1-yongxuan.wang@sifive.com> X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Fri, 15 Sep 2023 01:29:16 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777105886934377587 X-GMAIL-MSGID: 1777105886934377587 |
Series |
[1/2] RISC-V: Detect and Enable Svadu Extension Support
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Commit Message
Yong-Xuan Wang
Sept. 15, 2023, 8:26 a.m. UTC
We detect Svadu extension support from DTB and add arch_has_hw_pte_young() to enable optimization in MGLRU and __wp_page_copy_user() if Svadu extension is available. Signed-off-by: Jinyu Tang <tjytimi@163.com> Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> --- arch/riscv/include/asm/csr.h | 1 + arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/include/asm/pgtable.h | 6 ++++++ arch/riscv/kernel/cpufeature.c | 1 + 4 files changed, 9 insertions(+)
Comments
On Fri, Sep 15, 2023 at 08:26:57AM +0000, Yong-Xuan Wang wrote: > We detect Svadu extension support from DTB and add arch_has_hw_pte_young() > to enable optimization in MGLRU and __wp_page_copy_user() if Svadu > extension is available. > > Signed-off-by: Jinyu Tang <tjytimi@163.com> You're either missing a From: or a Co-developed-by: tag here. > Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> > --- > arch/riscv/include/asm/csr.h | 1 + > arch/riscv/include/asm/hwcap.h | 1 + > arch/riscv/include/asm/pgtable.h | 6 ++++++ > arch/riscv/kernel/cpufeature.c | 1 + > 4 files changed, 9 insertions(+) > > diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h > index 777cb8299551..10648b372a2a 100644 > --- a/arch/riscv/include/asm/csr.h > +++ b/arch/riscv/include/asm/csr.h > @@ -194,6 +194,7 @@ > /* xENVCFG flags */ > #define ENVCFG_STCE (_AC(1, ULL) << 63) > #define ENVCFG_PBMTE (_AC(1, ULL) << 62) > +#define ENVCFG_HADE (_AC(1, ULL) << 61) > #define ENVCFG_CBZE (_AC(1, UL) << 7) > #define ENVCFG_CBCFE (_AC(1, UL) << 6) > #define ENVCFG_CBIE_SHIFT 4 > diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h > index b7b58258f6c7..1013661d6516 100644 > --- a/arch/riscv/include/asm/hwcap.h > +++ b/arch/riscv/include/asm/hwcap.h > @@ -58,6 +58,7 @@ > #define RISCV_ISA_EXT_ZICSR 40 > #define RISCV_ISA_EXT_ZIFENCEI 41 > #define RISCV_ISA_EXT_ZIHPM 42 > +#define RISCV_ISA_EXT_SVADU 43 > > #define RISCV_ISA_EXT_MAX 64 > > diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h > index b2ba3f79cfe9..f3d077dff8ac 100644 > --- a/arch/riscv/include/asm/pgtable.h > +++ b/arch/riscv/include/asm/pgtable.h > @@ -629,6 +629,12 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot) > return __pgprot(prot); > } > > +#define arch_has_hw_pte_young arch_has_hw_pte_young > +static inline bool arch_has_hw_pte_young(void) > +{ > + return riscv_has_extension_likely(RISCV_ISA_EXT_SVADU); No hardware currently has this, why is it likely? > +} > + > /* > * THP functions > */ > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > index 1cfbba65d11a..ead378c04991 100644 > --- a/arch/riscv/kernel/cpufeature.c > +++ b/arch/riscv/kernel/cpufeature.c > @@ -178,6 +178,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { > __RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA), > __RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF), > __RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC), > + __RISCV_ISA_EXT_DATA(svadu, RISCV_ISA_EXT_SVADU), This needs to be documented in riscv/extensions.yaml. Thanks, Conor. > __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), > __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT), > __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT), > -- > 2.17.1 >
Hi Conor, On Fri, Sep 15, 2023 at 4:45 PM Conor Dooley <conor.dooley@microchip.com> wrote: > > On Fri, Sep 15, 2023 at 08:26:57AM +0000, Yong-Xuan Wang wrote: > > We detect Svadu extension support from DTB and add arch_has_hw_pte_young() > > to enable optimization in MGLRU and __wp_page_copy_user() if Svadu > > extension is available. > > > > Signed-off-by: Jinyu Tang <tjytimi@163.com> > > You're either missing a From: or a Co-developed-by: tag here. > > > Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> > > --- > > arch/riscv/include/asm/csr.h | 1 + > > arch/riscv/include/asm/hwcap.h | 1 + > > arch/riscv/include/asm/pgtable.h | 6 ++++++ > > arch/riscv/kernel/cpufeature.c | 1 + > > 4 files changed, 9 insertions(+) > > > > diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h > > index 777cb8299551..10648b372a2a 100644 > > --- a/arch/riscv/include/asm/csr.h > > +++ b/arch/riscv/include/asm/csr.h > > @@ -194,6 +194,7 @@ > > /* xENVCFG flags */ > > #define ENVCFG_STCE (_AC(1, ULL) << 63) > > #define ENVCFG_PBMTE (_AC(1, ULL) << 62) > > +#define ENVCFG_HADE (_AC(1, ULL) << 61) > > #define ENVCFG_CBZE (_AC(1, UL) << 7) > > #define ENVCFG_CBCFE (_AC(1, UL) << 6) > > #define ENVCFG_CBIE_SHIFT 4 > > diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h > > index b7b58258f6c7..1013661d6516 100644 > > --- a/arch/riscv/include/asm/hwcap.h > > +++ b/arch/riscv/include/asm/hwcap.h > > @@ -58,6 +58,7 @@ > > #define RISCV_ISA_EXT_ZICSR 40 > > #define RISCV_ISA_EXT_ZIFENCEI 41 > > #define RISCV_ISA_EXT_ZIHPM 42 > > +#define RISCV_ISA_EXT_SVADU 43 > > > > #define RISCV_ISA_EXT_MAX 64 > > > > diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h > > index b2ba3f79cfe9..f3d077dff8ac 100644 > > --- a/arch/riscv/include/asm/pgtable.h > > +++ b/arch/riscv/include/asm/pgtable.h > > @@ -629,6 +629,12 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot) > > return __pgprot(prot); > > } > > > > +#define arch_has_hw_pte_young arch_has_hw_pte_young > > +static inline bool arch_has_hw_pte_young(void) > > +{ > > + return riscv_has_extension_likely(RISCV_ISA_EXT_SVADU); > > No hardware currently has this, why is it likely? > > > +} > > + > > /* > > * THP functions > > */ > > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > > index 1cfbba65d11a..ead378c04991 100644 > > --- a/arch/riscv/kernel/cpufeature.c > > +++ b/arch/riscv/kernel/cpufeature.c > > @@ -178,6 +178,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { > > __RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA), > > __RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF), > > __RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC), > > + __RISCV_ISA_EXT_DATA(svadu, RISCV_ISA_EXT_SVADU), > > This needs to be documented in riscv/extensions.yaml. > Thank you! I will update these in v2 patch. Regards, Yong-Xuan > Thanks, > Conor. > > > __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), > > __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT), > > __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT), > > -- > > 2.17.1 > >
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 777cb8299551..10648b372a2a 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -194,6 +194,7 @@ /* xENVCFG flags */ #define ENVCFG_STCE (_AC(1, ULL) << 63) #define ENVCFG_PBMTE (_AC(1, ULL) << 62) +#define ENVCFG_HADE (_AC(1, ULL) << 61) #define ENVCFG_CBZE (_AC(1, UL) << 7) #define ENVCFG_CBCFE (_AC(1, UL) << 6) #define ENVCFG_CBIE_SHIFT 4 diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index b7b58258f6c7..1013661d6516 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -58,6 +58,7 @@ #define RISCV_ISA_EXT_ZICSR 40 #define RISCV_ISA_EXT_ZIFENCEI 41 #define RISCV_ISA_EXT_ZIHPM 42 +#define RISCV_ISA_EXT_SVADU 43 #define RISCV_ISA_EXT_MAX 64 diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index b2ba3f79cfe9..f3d077dff8ac 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -629,6 +629,12 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot) return __pgprot(prot); } +#define arch_has_hw_pte_young arch_has_hw_pte_young +static inline bool arch_has_hw_pte_young(void) +{ + return riscv_has_extension_likely(RISCV_ISA_EXT_SVADU); +} + /* * THP functions */ diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 1cfbba65d11a..ead378c04991 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -178,6 +178,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { __RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA), __RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF), __RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC), + __RISCV_ISA_EXT_DATA(svadu, RISCV_ISA_EXT_SVADU), __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT), __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT),