All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Sean Christopherson <seanjc@google.com>,
	Jim Mattson <jmattson@google.com>
Cc: David Rientjes <rientjes@google.com>,
	"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
	"Kleen, Andi" <andi.kleen@intel.com>,
	"Yamahata, Isaku" <isaku.yamahata@intel.com>,
	x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [RFCv1 5/7] x86/kvmclock: Share hvclock memory with the host
Date: Fri,  2 Apr 2021 18:26:43 +0300	[thread overview]
Message-ID: <20210402152645.26680-6-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20210402152645.26680-1-kirill.shutemov@linux.intel.com>

hvclock is shared between the guest and the hypervisor. It has to be
accessible by host.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/kernel/kvmclock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index aa593743acf6..3d004b278dba 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -252,7 +252,7 @@ static void __init kvmclock_init_mem(void)
 	 * hvclock is shared between the guest and the hypervisor, must
 	 * be mapped decrypted.
 	 */
-	if (sev_active()) {
+	if (sev_active() || kvm_mem_protected()) {
 		r = set_memory_decrypted((unsigned long) hvclock_mem,
 					 1UL << order);
 		if (r) {
-- 
2.26.3


  parent reply	other threads:[~2021-04-02 15:27 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-02 15:26 [RFCv1 0/7] TDX and guest memory unmapping Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 1/7] x86/mm: Move force_dma_unencrypted() to common code Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature Kirill A. Shutemov
2021-04-08  9:52   ` Borislav Petkov
2021-04-09 13:36     ` Kirill A. Shutemov
2021-04-09 14:37       ` Borislav Petkov
2021-04-02 15:26 ` [RFCv1 3/7] x86/kvm: Make DMA pages shared Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 4/7] x86/kvm: Use bounce buffers for KVM memory protection Kirill A. Shutemov
2021-04-02 15:26 ` Kirill A. Shutemov [this message]
2021-04-02 15:26 ` [RFCv1 6/7] x86/realmode: Share trampoline area if KVM memory protection enabled Kirill A. Shutemov
2021-04-02 15:26 ` [RFCv1 7/7] KVM: unmap guest memory using poisoned pages Kirill A. Shutemov
2021-04-06  7:44   ` David Hildenbrand
2021-04-06 10:50     ` Kirill A. Shutemov
2021-04-06 14:33     ` Dave Hansen
2021-04-06 14:57       ` David Hildenbrand
2021-04-07 13:16         ` Kirill A. Shutemov
2021-04-07 13:31           ` Christophe de Dinechin
2021-04-07 14:09             ` Andi Kleen
2021-04-07 14:09               ` Andi Kleen
2021-04-07 14:09           ` David Hildenbrand
2021-04-07 14:36             ` Kirill A. Shutemov
2021-04-06 17:52       ` Tom Lendacky
2021-04-07 14:55   ` David Hildenbrand
2021-04-07 15:10     ` Andi Kleen
2021-04-07 15:10       ` Andi Kleen
2021-04-09 13:33     ` Kirill A. Shutemov
2021-04-09 13:50       ` David Hildenbrand
2021-04-09 14:12         ` Kirill A. Shutemov
2021-04-09 14:18           ` David Hildenbrand

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=20210402152645.26680-6-kirill.shutemov@linux.intel.com \
    --to=kirill@shutemov.name \
    --cc=andi.kleen@intel.com \
    --cc=dave.hansen@linux.intel.com \
    --cc=isaku.yamahata@intel.com \
    --cc=jmattson@google.com \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=luto@kernel.org \
    --cc=peterz@infradead.org \
    --cc=rick.p.edgecombe@intel.com \
    --cc=rientjes@google.com \
    --cc=seanjc@google.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.