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Peter Anvin" , Nikunj A Dadhania Subject: [PATCH v3 03/16] x86/sev: Replace call of native_wrmsr() with native_wrmsrq() Date: Wed, 18 Feb 2026 09:21:20 +0100 Message-ID: <20260218082133.400602-4-jgross@suse.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260218082133.400602-1-jgross@suse.com> References: <20260218082133.400602-1-jgross@suse.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 X-Spam-Score: -6.80 X-Spam-Level: X-Spamd-Result: default: False [-6.80 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; RCPT_COUNT_SEVEN(0.00)[9]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLfdszjqhz8kzzb9uwpzdm8png)]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.com:mid,suse.com:email]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO Content-Type: text/plain; charset="utf-8" In sev_es_wr_ghcb_msr() the 64 bit MSR value is split into 2 32 bit values in order to call native_wrmsr(), which will combine the values into a 64 bit value again. Just use native_wrmsrq() instead. Signed-off-by: Juergen Gross Reviewed-by: Nikunj A Dadhania Reviewed-by: H. Peter Anvin (Intel) --- V2: - new patch --- arch/x86/coco/sev/internal.h | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/x86/coco/sev/internal.h b/arch/x86/coco/sev/internal.h index b1d0c66a651a..7b76d779a722 100644 --- a/arch/x86/coco/sev/internal.h +++ b/arch/x86/coco/sev/internal.h @@ -77,12 +77,7 @@ static inline u64 sev_es_rd_ghcb_msr(void) =20 static __always_inline void sev_es_wr_ghcb_msr(u64 val) { - u32 low, high; - - low =3D (u32)(val); - high =3D (u32)(val >> 32); - - native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high); + native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, val); } =20 enum es_result __vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt,= bool write); --=20 2.53.0