From: Juergen Gross <jgross@suse.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Juergen Gross <jgross@suse.com>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Tony Luck <tony.luck@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Dave Martin <Dave.Martin@arm.com>,
James Morse <james.morse@arm.com>,
Babu Moger <babu.moger@amd.com>
Subject: [PATCH v2 1/5] x86/msr: Switch users of native_wrmsr() to native_wrmsrq()
Date: Fri, 11 Sep 2026 09:52:12 +0200 [thread overview]
Message-ID: <20260911075216.3142309-2-jgross@suse.com> (raw)
In-Reply-To: <20260911075216.3142309-1-jgross@suse.com>
Switch all users of native_wrmsr() to native_wrmsrq() in order to
prepare removal of native_wrmsr().
Signed-off-by: Juergen Gross <jgross@suse.com>
---
V2:
- switch order of hi and lo parts when oring them (Reinette Chatre)
---
arch/x86/coco/sev/internal.h | 7 +------
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 4 ++--
2 files changed, 3 insertions(+), 8 deletions(-)
diff --git a/arch/x86/coco/sev/internal.h b/arch/x86/coco/sev/internal.h
index b9632c0fc391..2e2ff48a7aae 100644
--- a/arch/x86/coco/sev/internal.h
+++ b/arch/x86/coco/sev/internal.h
@@ -80,12 +80,7 @@ static inline u64 sev_es_rd_ghcb_msr(void)
static __always_inline void sev_es_wr_ghcb_msr(u64 val)
{
- u32 low, high;
-
- low = (u32)(val);
- high = (u32)(val >> 32);
-
- native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high);
+ native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, val);
}
enum es_result __vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt, bool write);
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 0408ac7f66fd..a04cf26e0302 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -175,7 +175,7 @@ int resctrl_arch_pseudo_lock_fn(void *_plr)
* pseudo-locked followed by reading of kernel memory to load it
* into the cache.
*/
- native_wrmsr(MSR_IA32_PQR_ASSOC, rmid_p, plr->closid);
+ native_wrmsrq(MSR_IA32_PQR_ASSOC, rmid_p | ((u64)plr->closid << 32));
/*
* Cache was flushed earlier. Now access kernel memory to read it
@@ -212,7 +212,7 @@ int resctrl_arch_pseudo_lock_fn(void *_plr)
* Critical section end: restore closid with capacity bitmask that
* does not overlap with pseudo-locked region.
*/
- native_wrmsr(MSR_IA32_PQR_ASSOC, rmid_p, closid_p);
+ native_wrmsrq(MSR_IA32_PQR_ASSOC, (u64)closid_p << 32 | rmid_p);
/* Re-enable the hardware prefetcher(s) */
wrmsrq(MSR_MISC_FEATURE_CONTROL, saved_msr);
--
2.55.0
next prev parent reply other threads:[~2026-09-11 7:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-11 7:52 [PATCH v2 0/5] x86/msr: Drop 32-bit interfaces of native MSR functions Juergen Gross
2026-09-11 7:52 ` Juergen Gross [this message]
2026-09-14 15:31 ` [PATCH v2 1/5] x86/msr: Switch users of native_wrmsr() to native_wrmsrq() Reinette Chatre
2026-09-11 7:52 ` [PATCH v2 2/5] x86/msr: Remove native_wrmsr() Juergen Gross
2026-09-11 7:52 ` [PATCH v2 3/5] x86/msr: Switch users of native_rdmsr() to native_rdmsrq() Juergen Gross
2026-09-11 7:52 ` [PATCH v2 4/5] x86/msr: Remove native_rdmsr() Juergen Gross
2026-09-11 7:52 ` [PATCH v2 5/5] x86/msr: Switch native_wrmsrq() from macro to inline function Juergen Gross
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260911075216.3142309-2-jgross@suse.com \
--to=jgross@suse.com \
--cc=Dave.Martin@arm.com \
--cc=babu.moger@amd.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=james.morse@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=reinette.chatre@intel.com \
--cc=tglx@kernel.org \
--cc=tony.luck@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®