From: Claudio Fontana <cfontana@suse.de>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>
Cc: Laurent Vivier <lvivier@redhat.com>,
Thomas Huth <thuth@redhat.com>,
Roman Bolshakov <r.bolshakov@yadro.com>,
Claudio Fontana <cfontana@suse.de>,
qemu-devel@nongnu.org
Subject: [PATCH v26 15/20] i386: split svm_helper into sysemu and stub-only user
Date: Mon, 1 Mar 2021 09:54:45 +0100 [thread overview]
Message-ID: <20210301085450.1732-16-cfontana@suse.de> (raw)
In-Reply-To: <20210301085450.1732-1-cfontana@suse.de>
For now we just copy over the previous user stubs, but really,
everything that requires s->cpl == 0 should be impossible
to trigger from user-mode emulation.
Later on we should add a check that asserts this easily f.e.:
static bool check_cpl0(DisasContext *s)
{
int cpl = s->cpl;
#ifdef CONFIG_USER_ONLY
assert(cpl == 3);
#endif
if (cpl != 0) {
gen_exception(s, EXCP0D_GPF, s->pc_start - s->cs_base);
return false;
}
return true;
}
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
target/i386/tcg/{ => sysemu}/svm_helper.c | 62 +-----------------
target/i386/tcg/user/svm_stubs.c | 76 +++++++++++++++++++++++
target/i386/tcg/meson.build | 1 -
target/i386/tcg/sysemu/meson.build | 1 +
target/i386/tcg/user/meson.build | 1 +
5 files changed, 80 insertions(+), 61 deletions(-)
rename target/i386/tcg/{ => sysemu}/svm_helper.c (96%)
create mode 100644 target/i386/tcg/user/svm_stubs.c
diff --git a/target/i386/tcg/svm_helper.c b/target/i386/tcg/sysemu/svm_helper.c
similarity index 96%
rename from target/i386/tcg/svm_helper.c
rename to target/i386/tcg/sysemu/svm_helper.c
index 097bb9b83d..5b9c6f18be 100644
--- a/target/i386/tcg/svm_helper.c
+++ b/target/i386/tcg/sysemu/svm_helper.c
@@ -1,5 +1,5 @@
/*
- * x86 SVM helpers
+ * x86 SVM helpers (sysemu only)
*
* Copyright (c) 2003 Fabrice Bellard
*
@@ -22,66 +22,10 @@
#include "exec/helper-proto.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
-#include "helper-tcg.h"
+#include "tcg/helper-tcg.h"
/* Secure Virtual Machine helpers */
-#if defined(CONFIG_USER_ONLY)
-
-void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
-{
-}
-
-void helper_vmmcall(CPUX86State *env)
-{
-}
-
-void helper_vmload(CPUX86State *env, int aflag)
-{
-}
-
-void helper_vmsave(CPUX86State *env, int aflag)
-{
-}
-
-void helper_stgi(CPUX86State *env)
-{
-}
-
-void helper_clgi(CPUX86State *env)
-{
-}
-
-void helper_skinit(CPUX86State *env)
-{
-}
-
-void helper_invlpga(CPUX86State *env, int aflag)
-{
-}
-
-void cpu_vmexit(CPUX86State *nenv, uint32_t exit_code, uint64_t exit_info_1,
- uintptr_t retaddr)
-{
- assert(0);
-}
-
-void helper_svm_check_intercept_param(CPUX86State *env, uint32_t type,
- uint64_t param)
-{
-}
-
-void cpu_svm_check_intercept_param(CPUX86State *env, uint32_t type,
- uint64_t param, uintptr_t retaddr)
-{
-}
-
-void helper_svm_check_io(CPUX86State *env, uint32_t port, uint32_t param,
- uint32_t next_eip_addend)
-{
-}
-#else
-
static inline void svm_save_seg(CPUX86State *env, hwaddr addr,
const SegmentCache *sc)
{
@@ -797,5 +741,3 @@ void do_vmexit(CPUX86State *env, uint32_t exit_code, uint64_t exit_info_1)
host's code segment or non-canonical (in the case of long mode), a
#GP fault is delivered inside the host. */
}
-
-#endif
diff --git a/target/i386/tcg/user/svm_stubs.c b/target/i386/tcg/user/svm_stubs.c
new file mode 100644
index 0000000000..97528b56ad
--- /dev/null
+++ b/target/i386/tcg/user/svm_stubs.c
@@ -0,0 +1,76 @@
+/*
+ * x86 SVM helpers (user-mode)
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "tcg/helper-tcg.h"
+
+void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
+{
+}
+
+void helper_vmmcall(CPUX86State *env)
+{
+}
+
+void helper_vmload(CPUX86State *env, int aflag)
+{
+}
+
+void helper_vmsave(CPUX86State *env, int aflag)
+{
+}
+
+void helper_stgi(CPUX86State *env)
+{
+}
+
+void helper_clgi(CPUX86State *env)
+{
+}
+
+void helper_skinit(CPUX86State *env)
+{
+}
+
+void helper_invlpga(CPUX86State *env, int aflag)
+{
+}
+
+void cpu_vmexit(CPUX86State *nenv, uint32_t exit_code, uint64_t exit_info_1,
+ uintptr_t retaddr)
+{
+ assert(0);
+}
+
+void helper_svm_check_intercept_param(CPUX86State *env, uint32_t type,
+ uint64_t param)
+{
+}
+
+void cpu_svm_check_intercept_param(CPUX86State *env, uint32_t type,
+ uint64_t param, uintptr_t retaddr)
+{
+}
+
+void helper_svm_check_io(CPUX86State *env, uint32_t port, uint32_t param,
+ uint32_t next_eip_addend)
+{
+}
diff --git a/target/i386/tcg/meson.build b/target/i386/tcg/meson.build
index 449d9719ef..f9110e890c 100644
--- a/target/i386/tcg/meson.build
+++ b/target/i386/tcg/meson.build
@@ -8,7 +8,6 @@ i386_ss.add(when: 'CONFIG_TCG', if_true: files(
'misc_helper.c',
'mpx_helper.c',
'seg_helper.c',
- 'svm_helper.c',
'tcg-cpu.c',
'translate.c'), if_false: files('tcg-stub.c'))
diff --git a/target/i386/tcg/sysemu/meson.build b/target/i386/tcg/sysemu/meson.build
index f84519a213..126528d0c9 100644
--- a/target/i386/tcg/sysemu/meson.build
+++ b/target/i386/tcg/sysemu/meson.build
@@ -5,4 +5,5 @@ i386_softmmu_ss.add(when: ['CONFIG_TCG', 'CONFIG_SOFTMMU'], if_true: files(
'bpt_helper.c',
'misc_helper.c',
'fpu_helper.c',
+ 'svm_helper.c',
))
diff --git a/target/i386/tcg/user/meson.build b/target/i386/tcg/user/meson.build
index 2ab8bd903c..3edaee7402 100644
--- a/target/i386/tcg/user/meson.build
+++ b/target/i386/tcg/user/meson.build
@@ -1,4 +1,5 @@
i386_user_ss.add(when: ['CONFIG_TCG', 'CONFIG_USER_ONLY'], if_true: files(
'excp_helper.c',
'misc_stubs.c',
+ 'svm_stubs.c',
))
--
2.26.2
next prev parent reply other threads:[~2021-03-01 9:05 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 8:54 [PATCH v26 00/20] i386 cleanup PART 2 Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 01/20] target/i386: Rename helper_fldt, helper_fstt Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 02/20] target/i386: Split out do_fsave, do_frstor, do_fxsave, do_fxrstor Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 03/20] i386: split cpu accelerators from cpu.c, using AccelCPUClass Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 04/20] cpu: call AccelCPUClass::cpu_realizefn in cpu_exec_realizefn Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 05/20] accel: introduce new accessor functions Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 06/20] target/i386: fix host_cpu_adjust_phys_bits error handling Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 07/20] accel-cpu: make cpu_realizefn return a bool Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 08/20] meson: add target_user_arch Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 09/20] i386: split off sysemu-only functionality in tcg-cpu Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 10/20] i386: split smm helper (sysemu) Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 11/20] i386: split tcg excp_helper into sysemu and user parts Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 12/20] i386: move TCG bpt_helper into sysemu/ Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 13/20] i386: split misc helper user stubs and sysemu part Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 14/20] i386: separate fpu_helper sysemu-only parts Claudio Fontana
2021-03-01 8:54 ` Claudio Fontana [this message]
2021-03-01 8:54 ` [PATCH v26 16/20] i386: split seg_helper into user-only and sysemu parts Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 17/20] i386: split off sysemu part of cpu.c Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 18/20] target/i386: gdbstub: introduce aux functions to read/write CS64 regs Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 19/20] target/i386: gdbstub: only write CR0/CR2/CR3/EFER for sysemu Claudio Fontana
2021-03-01 8:54 ` [PATCH v26 20/20] i386: make cpu_load_efer sysemu-only Claudio Fontana
2021-03-01 9:18 ` [PATCH v26 00/20] i386 cleanup PART 2 no-reply
2021-03-08 12:57 ` Claudio Fontana
2021-03-08 13:27 ` Philippe Mathieu-Daudé
2021-03-08 13:52 ` Claudio Fontana
2021-03-08 14:57 ` Philippe Mathieu-Daudé
2021-03-08 15:03 ` Claudio Fontana
2021-03-08 15:07 ` Daniel P. Berrangé
2021-03-08 14:02 ` Alex Bennée
2021-05-05 8:27 ` Claudio Fontana
2021-05-05 10:04 ` Alex Bennée
2021-05-05 12:15 ` Philippe Mathieu-Daudé
2021-05-05 12:24 ` Philippe Mathieu-Daudé
2021-05-05 19:31 ` Eduardo Habkost
2021-05-06 7:55 ` Claudio Fontana
2021-05-06 9:10 ` Philippe Mathieu-Daudé
2021-05-06 9:33 ` Philippe Mathieu-Daudé
2021-05-12 7:17 ` Philippe Mathieu-Daudé
2021-05-17 6:17 ` Claudio Fontana
2021-05-19 18:17 ` Philippe Mathieu-Daudé
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