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qemu/target/i386
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Eduardo Habkost 730319aef0 i386: Mask SVM features if nested SVM is disabled 
QEMU incorrectly validates FEAT_SVM feature flags against
GET_SUPPORTED_CPUID even if SVM features are being masked out by
cpu_x86_cpuid().  This can make QEMU print warnings on most AMD
CPU models, even when SVM nesting is disabled (which is the
default).

This bug was never detected before because of a Linux KVM bug:
until Linux v5.6, KVM was not filtering out SVM features in
GET_SUPPORTED_CPUID when nested was disabled.  This KVM bug was
fixed in Linux v5.7-rc1, on Linux commit a50718cc3f43 ("KVM:
nSVM: Expose SVM features to L1 iff nested is enabled").

Fix the problem by adding a CPUID_EXT3_SVM dependency to all
FEAT_SVM feature flags in the feature_dependencies table.

Reported-by: Yanan Fu <yfu@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20200623230116.277409-1-ehabkost@redhat.com>
[Fix testcase. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-06-26 09:39:40 -04:00
..
hvf i386: hvf: Drop HVFX86EmulatorState 2020-06-12 11:20:12 -04:00
arch_dump.c dump: add kernel_gs_base to QEMU CPU state 2018-07-16 16:13:34 +02:00
arch_memory_mapping.c exec,dump,i386,ppc,s390x: don't include exec/cpu-all.h explicitly 2017-09-19 18:21:33 +02:00
bpt_helper.c target/i386: Use env_cpu, env_archcpu 2019-06-10 07:03:42 -07:00
cc_helper_template.h
cc_helper.c
cpu-param.h tcg: Split out target/arch/cpu-param.h 2019-06-10 07:03:34 -07:00
cpu-qom.h cpu: Use DeviceClass reset instead of a special CPUClass reset 2020-03-17 19:48:10 -04:00
cpu.c i386: Mask SVM features if nested SVM is disabled 2020-06-26 09:39:40 -04:00
cpu.h i386: hvf: Drop HVFX86EmulatorState 2020-06-12 11:20:12 -04:00
excp_helper.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
fpu_helper.c target/i386: reimplement fpatan using floatx80 operations 2020-06-26 09:39:39 -04:00
gdbstub.c gdbstub: i386: Fix gdb_get_reg16() parameter to unbreak gdb 2020-04-15 11:38:23 +01:00
hax-all.c hax: Dynamic allocate vcpu state structure 2020-06-10 12:09:59 -04:00
hax-i386.h i386: Remove unused define's from hax and hvf 2020-06-10 12:10:47 -04:00
hax-interface.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
hax-mem.c qemu/queue.h: leave head structs anonymous unless necessary 2019-01-11 15:46:55 +01:00
hax-posix.c i386: Fix GCC warning with snprintf when HAX is enabled 2020-03-16 23:02:24 +01:00
hax-posix.h Clean up header guards that don't match their file name 2019-05-13 08:58:55 +02:00
hax-windows.c hax: Windows doesn't like posix device names 2020-04-14 10:37:42 -04:00
hax-windows.h hax: Support guest RAM sizes of 4GB or more 2018-02-13 11:44:13 +01:00
helper.c Fix wrong behavior of cpu_memory_rw_debug() function in SMM 2019-10-04 18:49:18 +02:00
helper.h target/i386: Implement CPUID_EXT_RDRAND 2019-05-22 12:38:54 -04:00
hyperv-proto.h i386/kvm: add NoNonArchitecturalCoreSharing Hyper-V enlightenment 2019-10-22 09:38:42 +02:00
hyperv-stub.c target/i386: fix feature check in hyperv-stub.c 2019-07-05 22:16:46 +02:00
hyperv.c i386/kvm: convert hyperv enlightenments properties from bools to bits 2019-06-21 02:29:38 +02:00
hyperv.h hyperv: qom-ify SynIC 2018-10-19 13:44:14 +02:00
int_helper.c target/i386: Implement CPUID_EXT_RDRAND 2019-05-22 12:38:54 -04:00
kvm_i386.h target/i386: kvm: initialize feature MSRs very early 2020-01-24 20:59:09 +01:00
kvm-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
kvm.c kvm: i386: allow TSC to differ by NTP correction bounds without TSC scaling 2020-06-26 09:39:40 -04:00
machine.c Fix some comment spelling errors. 2019-12-18 02:34:11 +01:00
Makefile.objs target-i386: add kvm stubs to user-mode emulators 2019-03-11 16:33:49 +01:00
mem_helper.c tcg: Search includes from the project root source directory 2020-01-15 15:13:10 -10:00
misc_helper.c target/i386: Fix OUTL debug output 2020-06-10 12:09:35 -04:00
monitor.c hw: replace hw/i386/pc.h with a header just for the i8259 2019-12-17 19:33:49 +01:00
mpx_helper.c
ops_sse_header.h
ops_sse.h target/i386: correct fix for pcmpxstrx substring search 2020-06-12 11:10:39 -04:00
seg_helper.c target/i386: Use cpu_*_mmuidx_ra instead of templates 2020-01-15 15:13:10 -10:00
sev_i386.h target/i386: sev: Move local structure definitions into .c file 2020-06-12 11:20:13 -04:00
sev-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
sev.c target/i386: sev: Unify SEVState and SevGuestState 2020-06-12 11:20:14 -04:00
shift_helper_template.h
smm_helper.c target/i386: Use env_cpu, env_archcpu 2019-06-10 07:03:42 -07:00
svm_helper.c target/i386: Use env_cpu, env_archcpu 2019-06-10 07:03:42 -07:00
svm.h target-i386: Add NPT support 2018-07-02 15:41:18 +02:00
trace-events trace-events: Shorten file names in comments 2019-03-22 16:18:07 +00:00
translate.c linux-user/i386: Emulate x86_64 vsyscalls 2020-03-26 08:08:54 +01:00
whp-dispatch.h WHPX: TSC get and set should be dependent on VM state 2020-03-16 23:02:21 +01:00
whpx-all.c WHPX: Use proper synchronization primitives while processing 2020-03-16 23:02:24 +01:00
xsave_helper.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00