From nobody Mon Feb 9 13:36:46 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2158142AB7; Tue, 13 Jan 2026 00:18:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768263519; cv=none; b=I1HA70JdAJ5NABVdM0pdvhf+8+gQXW6B+62jFJl1Elgjx4KgTGGwscOxQakQWAbCI6AcJDLiiRfHrfWYhBWH/CvUHm9XxRLmuUArFYCQHtJx6deCiyrlWDwITyGchB/eB3R8SII9vB3+l6JonOyepFuJ2Wk8OL51s+pKhOK2KNI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768263519; c=relaxed/simple; bh=j9NteoQM1X9ErYC0oA1l11qc0KR8u2v6ZijCHhf7BHU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G0jeXtKJ4BNSWHLzHln4ND6eWVj1Txwt3gYhnQeYCpGZl+dPLh3Bk2ACr8OwTao+98P+s5B5nRiMX0NIAk/bUCOO4+QYvSmgOjpkz4QhnHwkzLHxqbmWIJnihynB3HIxH0cG3AL5xIRlWmkT0UmWZ91/eYifaDphWNlE8YpfjuA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Cn0AIoKN; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Cn0AIoKN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768263515; x=1799799515; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=j9NteoQM1X9ErYC0oA1l11qc0KR8u2v6ZijCHhf7BHU=; b=Cn0AIoKNDrGSoj9cPlweuMQ3RdoMt7nenP6V13DBIfOJysswqW12zkuv 98GdALFkQHq2o1Iwq0H/wjKfO/+NT7/MypNuFIsol2MkVnc7OmL5PcIBA sbENeV2e3ItfMDTL0s+d88e1zPACNiT1PlA4RFCEzjZ5NvuWyIXntL+oh 2qvK6KAGsnb8+1L7TuRA/Rn99gFYk1m4TQEBpyJimMMNplKmsn0z8+anq lUr1kM2ePmrVIt+bnSt76pj7TFEIqDjHyWYR4AFVIL1kX3rKYGhBmWGKD 5jFEzV9e+BlfqePTOldyKp+tDFBEVLuRX3pIXRDyZCQsBBhN4AgeF+Tg+ w==; X-CSE-ConnectionGUID: ks5c+8diTba9NtzOus3U/Q== X-CSE-MsgGUID: LatQ91qtQgayUQpoGQgx6w== X-IronPort-AV: E=McAfee;i="6800,10657,11669"; a="80264244" X-IronPort-AV: E=Sophos;i="6.21,222,1763452800"; d="scan'208";a="80264244" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2026 16:18:32 -0800 X-CSE-ConnectionGUID: COJBFgOUS8OA4hOHTGTLww== X-CSE-MsgGUID: A4hHAnAHS+Sav8Id8VnPtw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,222,1763452800"; d="scan'208";a="204042267" Received: from chang-linux-3.sc.intel.com (HELO chang-linux-3) ([172.25.66.172]) by orviesa009.jf.intel.com with ESMTP; 12 Jan 2026 16:18:33 -0800 From: "Chang S. Bae" To: pbonzini@redhat.com, seanjc@google.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, chao.gao@intel.com, chang.seok.bae@intel.com Subject: [PATCH v2 09/16] KVM: emulate: Support EGPR accessing and tracking Date: Mon, 12 Jan 2026 23:54:01 +0000 Message-ID: <20260112235408.168200-10-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260112235408.168200-1-chang.seok.bae@intel.com> References: <20260112235408.168200-1-chang.seok.bae@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend the emulator context and GPR accessors to handle EGPRs before adding support for REX2-prefixed instructions. Now the KVM GPR accessors can handle EGPRs. Then, the emulator can uniformly cache and track all GPRs without requiring separate handling. Signed-off-by: Chang S. Bae --- arch/x86/kvm/kvm_emulate.h | 10 +++++----- arch/x86/kvm/x86.c | 4 ++-- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h index fb3dab4b5a53..16b35a796a7f 100644 --- a/arch/x86/kvm/kvm_emulate.h +++ b/arch/x86/kvm/kvm_emulate.h @@ -105,13 +105,13 @@ struct x86_instruction_info { struct x86_emulate_ops { void (*vm_bugged)(struct x86_emulate_ctxt *ctxt); /* - * read_gpr: read a general purpose register (rax - r15) + * read_gpr: read a general purpose register (rax - r31) * * @reg: gpr number. */ ulong (*read_gpr)(struct x86_emulate_ctxt *ctxt, unsigned reg); /* - * write_gpr: write a general purpose register (rax - r15) + * write_gpr: write a general purpose register (rax - r31) * * @reg: gpr number. * @val: value to write. @@ -314,7 +314,7 @@ typedef void (*fastop_t)(struct fastop *); * a ModRM or SIB byte. */ #ifdef CONFIG_X86_64 -#define NR_EMULATOR_GPRS 16 +#define NR_EMULATOR_GPRS 32 #else #define NR_EMULATOR_GPRS 8 #endif @@ -373,9 +373,9 @@ struct x86_emulate_ctxt { u8 lock_prefix; u8 rep_prefix; /* bitmaps of registers in _regs[] that can be read */ - u16 regs_valid; + u32 regs_valid; /* bitmaps of registers in _regs[] that have been written */ - u16 regs_dirty; + u32 regs_dirty; /* modrm */ u8 modrm; u8 modrm_mod; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index edac2ec11e2f..e7f858488f2c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8894,12 +8894,12 @@ static bool emulator_guest_cpuid_is_intel_compatibl= e(struct x86_emulate_ctxt *ct =20 static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) { - return kvm_register_read_raw(emul_to_vcpu(ctxt), reg); + return kvm_gpr_read_raw(emul_to_vcpu(ctxt), reg); } =20 static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg= , ulong val) { - kvm_register_write_raw(emul_to_vcpu(ctxt), reg, val); + kvm_gpr_write_raw(emul_to_vcpu(ctxt), reg, val); } =20 static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool mask= ed) --=20 2.51.0