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target/i386/sev: Restrict SEV to system emulation 

SEV is irrelevant on user emulation, so restrict it to sysemu.
Some stubs are still required because used in cpu.c by
x86_register_cpudef_types(), so move the sysemu specific stubs
to sev-sysemu-stub.c instead. This will allow us to simplify
monitor.c (which is not available in user emulation) in the
next commit.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211007161716.453984-14-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-10-07 18:17:06 +02:00 committed by Paolo Bonzini
parent 2f573c415e
commit e24b333204
3 changed files with 63 additions and 44 deletions
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4
target/i386/meson.build
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@ -6,7 +6,7 @@ i386_ss.add(files(
'xsave_helper.c',
'cpu-dump.c',
))
i386_ss.add(when: 'CONFIG_SEV', if_true: files('host-cpu.c', 'sev.c'), if_false: files('sev-stub.c'))
i386_ss.add(when: 'CONFIG_SEV', if_true: files('host-cpu.c'), if_false: files('sev-stub.c'))
# x86 cpu type
i386_ss.add(when: 'CONFIG_KVM', if_true: files('host-cpu.c'))
@ -20,6 +20,8 @@ i386_softmmu_ss.add(files(
'monitor.c',
'cpu-sysemu.c',
))
i386_softmmu_ss.add(when: 'CONFIG_SEV', if_true: files('sev.c'), if_false: files('sev-sysemu-stub.c'))
i386_user_ss = ss.source_set()
subdir('kvm')

43
target/i386/sev-stub.c
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@ -15,11 +15,6 @@
#include "qapi/error.h"
#include "sev_i386.h"
SevInfo *sev_get_info(void)
{
return NULL;
}
bool sev_enabled(void)
{
return false;
@ -35,49 +30,11 @@ uint32_t sev_get_reduced_phys_bits(void)
return 0;
}
char *sev_get_launch_measurement(void)
{
return NULL;
}
SevCapability *sev_get_capabilities(Error **errp)
{
error_setg(errp, "SEV is not available in this QEMU");
return NULL;
}
int sev_inject_launch_secret(const char *hdr, const char *secret,
uint64_t gpa, Error **errp)
{
return 1;
}
int sev_encrypt_flash(uint8_t *ptr, uint64_t len, Error **errp)
{
g_assert_not_reached();
}
bool sev_es_enabled(void)
{
return false;
}
void sev_es_set_reset_vector(CPUState *cpu)
{
}
int sev_es_save_reset_vector(void *flash_ptr, uint64_t flash_size)
{
g_assert_not_reached();
}
SevAttestationReport *
sev_get_attestation_report(const char *mnonce, Error **errp)
{
error_setg(errp, "SEV is not available in this QEMU");
return NULL;
}
bool sev_add_kernel_loader_hashes(SevKernelLoaderContext *ctx, Error **errp)
{
g_assert_not_reached();

60
target/i386/sev-sysemu-stub.c Normal file
View File

@ -0,0 +1,60 @@
/*
* QEMU SEV system stub
*
* Copyright Advanced Micro Devices 2018
*
* Authors:
* Brijesh Singh <brijesh.singh@amd.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qapi/qapi-commands-misc-target.h"
#include "qapi/error.h"
#include "sev_i386.h"
SevInfo *sev_get_info(void)
{
return NULL;
}
char *sev_get_launch_measurement(void)
{
return NULL;
}
SevCapability *sev_get_capabilities(Error **errp)
{
error_setg(errp, "SEV is not available in this QEMU");
return NULL;
}
int sev_inject_launch_secret(const char *hdr, const char *secret,
uint64_t gpa, Error **errp)
{
return 1;
}
int sev_encrypt_flash(uint8_t *ptr, uint64_t len, Error **errp)
{
g_assert_not_reached();
}
void sev_es_set_reset_vector(CPUState *cpu)
{
}
int sev_es_save_reset_vector(void *flash_ptr, uint64_t flash_size)
{
g_assert_not_reached();
}
SevAttestationReport *sev_get_attestation_report(const char *mnonce,
Error **errp)
{
error_setg(errp, "SEV is not available in this QEMU");
return NULL;
}