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Thu, 03 Aug 2023 11:33:56 -0700 (PDT) Date: Thu, 03 Aug 2023 11:33:52 -0700 Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAA/zy2QC/32NywrCMBBFf6VkbaR5qNWV/yEieU0bSJuQlFAp/ XeT7lzo8sxw7llRMtGahG7NiqLJNlk/FWCHBqlBTL3BVhdGtKWs7VqGQ1Cv2UnrFhesxgq0BA6 awwVQkaRIBssoJjVUbRRpNrE+QjRgl730eBYebJp9fO/hTOr1ZyMTTHDHBZHqpOB6Zvfe+96Zo /IjqluZ/vdp8SkhAIJoIFf+5W/b9gEPHU1kBgEAAA== X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=UIrHvErwpgNbhCkRZAYSX0CFd/XFEwqX3D0xqtqjNug= X-Developer-Signature: v=1; a=ed25519-sha256; t=1691087634; l=3590; i=ndesaulniers@google.com; s=20220923; h=from:subject:message-id; bh=DXS75M6ip4LIo9QVOPrHgK0haQj5/x/umg+wlNPWCPQ=; b=AfeE+hGjVv3usaoDClqYLXcfcyNoLusX6a90nkmY2QDifz22bZ5hqW8UPQE+UW4b6yR7D6XX6 kx3WwCXMXWtBwssf5qp7Ju6NNxmRCCQDloYP+6XypBgQ9bapq9Ou/AQ X-Mailer: b4 0.12.3 Message-ID: <20230803-ppc_tlbilxlpid-v3-1-ca84739bfd73@google.com> Subject: [PATCH v3] powerpc/inst: add PPC_TLBILX_LPID From: Nick Desaulniers To: Michael Ellerman , Nicholas Piggin , Christophe Leroy , Nathan Chancellor , Tom Rix X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel test robot , kvm@vger.kernel.org, llvm@lists.linux.dev, Nick Desaulniers , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Clang didn't recognize the instruction tlbilxlpid. This was fixed in clang-18 [0] then backported to clang-17 [1]. To support clang-16 and older, rather than using that instruction bare in inline asm, add it to ppc-opcode.h and use that macro as is done elsewhere for other instructions. Link: https://github.com/ClangBuiltLinux/linux/issues/1891 Link: https://github.com/llvm/llvm-project/issues/64080 Link: https://github.com/llvm/llvm-project/commit/53648ac1d0c953ae6d008864dd2eddb437a92468 [0] Link: https://github.com/llvm/llvm-project-release-prs/commit/0af7e5e54a8c7ac665773ac1ada328713e8338f5 [1] Reported-by: kernel test robot Closes: https://lore.kernel.org/llvm/202307211945.TSPcyOhh-lkp@intel.com/ Suggested-by: Michael Ellerman Signed-off-by: Nick Desaulniers Reviewed-by: Christophe Leroy --- Changes in v3: - left comment @ https://github.com/linuxppc/issues/issues/350#issuecomment-1664417212 - restore PPC_RAW_TLBILX previous definition - fix comment style - Link to v2: https://lore.kernel.org/r/20230803-ppc_tlbilxlpid-v2-1-211ffa1df194@google.com Changes in v2: - add 2 missing tabs to PPC_RAW_TLBILX_LPID - Link to v1: https://lore.kernel.org/r/20230803-ppc_tlbilxlpid-v1-1-84a1bc5cf963@google.com --- arch/powerpc/include/asm/ppc-opcode.h | 2 ++ arch/powerpc/kvm/e500mc.c | 11 ++++++++--- 2 files changed, 10 insertions(+), 3 deletions(-) --- base-commit: 7bafbd4027ae86572f308c4ddf93120c90126332 change-id: 20230803-ppc_tlbilxlpid-cfdbf4fd4f7f Best regards, diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h index ef6972aa33b9..005601243dda 100644 --- a/arch/powerpc/include/asm/ppc-opcode.h +++ b/arch/powerpc/include/asm/ppc-opcode.h @@ -397,6 +397,7 @@ #define PPC_RAW_RFCI (0x4c000066) #define PPC_RAW_RFDI (0x4c00004e) #define PPC_RAW_RFMCI (0x4c00004c) +#define PPC_RAW_TLBILX_LPID (0x7c000024) #define PPC_RAW_TLBILX(t, a, b) (0x7c000024 | __PPC_T_TLB(t) | __PPC_RA0(a) | __PPC_RB(b)) #define PPC_RAW_WAIT_v203 (0x7c00007c) #define PPC_RAW_WAIT(w, p) (0x7c00003c | __PPC_WC(w) | __PPC_PL(p)) @@ -616,6 +617,7 @@ #define PPC_TLBILX(t, a, b) stringify_in_c(.long PPC_RAW_TLBILX(t, a, b)) #define PPC_TLBILX_ALL(a, b) PPC_TLBILX(0, a, b) #define PPC_TLBILX_PID(a, b) PPC_TLBILX(1, a, b) +#define PPC_TLBILX_LPID stringify_in_c(.long PPC_RAW_TLBILX_LPID) #define PPC_TLBILX_VA(a, b) PPC_TLBILX(3, a, b) #define PPC_WAIT_v203 stringify_in_c(.long PPC_RAW_WAIT_v203) #define PPC_WAIT(w, p) stringify_in_c(.long PPC_RAW_WAIT(w, p)) diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c index d58df71ace58..7c09c000c330 100644 --- a/arch/powerpc/kvm/e500mc.c +++ b/arch/powerpc/kvm/e500mc.c @@ -16,10 +16,11 @@ #include #include -#include #include -#include #include +#include +#include +#include #include "booke.h" #include "e500.h" @@ -92,7 +93,11 @@ void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500) local_irq_save(flags); mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu)); - asm volatile("tlbilxlpid"); + /* + * clang-17 and older could not assemble tlbilxlpid. + * https://github.com/ClangBuiltLinux/linux/issues/1891 + */ + asm volatile (PPC_TLBILX_LPID); mtspr(SPRN_MAS5, 0); local_irq_restore(flags); }