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[79.129.180.152]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b73c52735sm85216535e9.22.2025.08.29.00.00.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Aug 2025 00:00:25 -0700 (PDT) Date: Fri, 29 Aug 2025 09:59:22 +0300 From: Manos Pitsidianakis To: qemu-devel@nongnu.org, Richard Henderson Cc: qemu-arm@nongnu.org Subject: Re: [PATCH 05/61] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID User-Agent: meli/0.8.12 References: <20250827010453.4059782-1-richard.henderson@linaro.org> <20250827010453.4059782-7-richard.henderson@linaro.org> In-Reply-To: <20250827010453.4059782-7-richard.henderson@linaro.org> Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Received-SPF: pass client-ip=2a00:1450:4864:20::32d; envelope-from=manos.pitsidianakis@linaro.org; helo=mail-wm1-x32d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, 27 Aug 2025 04:03, Richard Henderson wrote: >Conversion between KVM system registers ids and the HVF system >register ids is trivial. > >Signed-off-by: Richard Henderson >--- Reviewed-by: Manos Pitsidianakis > target/arm/hvf/hvf.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > >diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c >index 7b0413093d..47165bd29c 100644 >--- a/target/arm/hvf/hvf.c >+++ b/target/arm/hvf/hvf.c >@@ -403,6 +403,26 @@ struct hvf_sreg_match { > uint32_t cp_idx; > }; > >+/* >+ * QEMU uses KVM system register ids in the migration format. >+ * Conveniently, HVF uses the same encoding of the op* and cr* parameters >+ * within the low 16 bits of the ids. Thus conversion between the >+ * formats is trivial. >+ */ >+ >+#define KVMID_TO_HVF(KVM) ((KVM) & 0xffff) >+#define HVF_TO_KVMID(HVF) \ >+ (CP_REG_ARM64 | CP_REG_SIZE_U64 | CP_REG_ARM64_SYSREG | (HVF)) >+ >+/* Verify this at compile-time. */ >+ >+#define DEF_SYSREG(HVF_ID, ...) \ >+ QEMU_BUILD_BUG_ON(HVF_ID != KVMID_TO_HVF(KVMID_AA64_SYS_REG64(__VA_ARGS__))); >+ >+#include "sysreg.c.inc" >+ >+#undef DEF_SYSREG >+ > #define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) \ > { HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) }, > >-- >2.43.0 > >