Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
848 B
C
45 lines
848 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* AMD SEV header for early boot related functions.
|
|
*
|
|
* Author: Tom Lendacky <thomas.lendacky@amd.com>
|
|
*/
|
|
|
|
#ifndef BOOT_COMPRESSED_SEV_H
|
|
#define BOOT_COMPRESSED_SEV_H
|
|
|
|
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
|
|
|
#include <asm/shared/msr.h>
|
|
|
|
void snp_accept_memory(phys_addr_t start, phys_addr_t end);
|
|
u64 sev_get_status(void);
|
|
bool early_is_sevsnp_guest(void);
|
|
|
|
static inline u64 sev_es_rd_ghcb_msr(void)
|
|
{
|
|
struct msr m;
|
|
|
|
raw_rdmsr(MSR_AMD64_SEV_ES_GHCB, &m);
|
|
|
|
return m.q;
|
|
}
|
|
|
|
static inline void sev_es_wr_ghcb_msr(u64 val)
|
|
{
|
|
struct msr m;
|
|
|
|
m.q = val;
|
|
raw_wrmsr(MSR_AMD64_SEV_ES_GHCB, &m);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void snp_accept_memory(phys_addr_t start, phys_addr_t end) { }
|
|
static inline u64 sev_get_status(void) { return 0; }
|
|
static inline bool early_is_sevsnp_guest(void) { return false; }
|
|
|
|
#endif
|
|
|
|
#endif
|