From nobody Mon Feb 9 06:48:29 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) (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 B242B225779; Sun, 21 Dec 2025 04:31:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766291505; cv=none; b=d3PIyvk76Z6r1fl8wiA323xIDFgEOCbZ+NAwNUsdSWptxY38z7HlbOFkr3CDhVCmR+bsgATK5piA0mqhcHSpTablur0wOlg4+8ocpKu5+x/nKJzhbUQc4jlfQLrUwix9f/aU73GgBcnXS/dmzM4D0kV8dn6wfaXKheoTKEZ2c4w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766291505; c=relaxed/simple; bh=zkoXqskiBbDIfaa1XN7EYMIqCDWEv3YgveEwuaplNM0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gS5bQG2NvWfvx7yjlUAsKxqBGZ0lThyEX26yvHrXX5bJy/WOyxUKjwBhB4q50S8hTHzSdwtf9KjTftHCQmZrFZznsbZS7L1EUQKyptGN9lAMZSxztcCOCBX9AAceXo9ImrhccemP+OABzYqURE/v7wBVWYDUer0G0KSCEUYYLn4= 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=Y9hDCVJh; arc=none smtp.client-ip=198.175.65.21 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="Y9hDCVJh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1766291503; x=1797827503; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zkoXqskiBbDIfaa1XN7EYMIqCDWEv3YgveEwuaplNM0=; b=Y9hDCVJhstpzDB9IrN6gq8igq01dIMotPFOhO2YfYzdtaiireigRBzzr Z6c1Ld5EdlNh9caUoiBmrnvgKIUMmB5SL1OyowtBA6nF5SCV4KjGRb01B CEiDuvLzYtddDFbNNMS8CQ6xGsWxe7YrHILaf7b8bo0poDhv2mRu5XF+E f7B36Kg50eBf/lwav/XXf4Y9Osfl/TE0Du/QY0l+BSL2sjzxc4dFI7Bs6 zHGOniO/6w6+uIIJTWRaFwzy7nA2rw6A6vwKkY7wAw+4+8pGGvVUscdE9 Uoh+MNpdCBAKPY0AE8vefKFON7UiyBprBA7Sy89N1l9WZj9hwRH0+lm4B A==; X-CSE-ConnectionGUID: kTJWFfMWRCm9b/xKSasTUA== X-CSE-MsgGUID: 9whfn61wSgCr0n04ACya3g== X-IronPort-AV: E=McAfee;i="6800,10657,11635"; a="68132412" X-IronPort-AV: E=Sophos;i="6.20,256,1758610800"; d="scan'208";a="68132412" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2025 20:31:43 -0800 X-CSE-ConnectionGUID: iqL5rOvJSt2wn3gJE5Q5cA== X-CSE-MsgGUID: 2IWu/6pxQWeOYxN1+/XrLw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,164,1763452800"; d="scan'208";a="229885010" Received: from chang-linux-3.sc.intel.com (HELO chang-linux-3) ([172.25.66.172]) by orviesa002.jf.intel.com with ESMTP; 20 Dec 2025 20:31:43 -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 09/16] KVM: emulate: Support EGPR accessing and tracking Date: Sun, 21 Dec 2025 04:07:35 +0000 Message-ID: <20251221040742.29749-10-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251221040742.29749-1-chang.seok.bae@intel.com> References: <20251221040742.29749-1-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 --- No change since last version --- 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 819986edb79c..abbc9b8736e7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8817,12 +8817,12 @@ 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