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Mon, 28 Oct 2024 08:50:07 -0700 (PDT) From: Alejandro Vallejo To: xen-devel@lists.xenproject.org Cc: Alejandro Vallejo , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH 09/14] x86/emulator: Refactor FXSAVE_AREA to use wrappers Date: Mon, 28 Oct 2024 15:49:27 +0000 Message-ID: <20241028154932.6797-10-alejandro.vallejo@cloud.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241028154932.6797-1-alejandro.vallejo@cloud.com> References: <20241028154932.6797-1-alejandro.vallejo@cloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @cloud.com) X-ZM-MESSAGEID: 1730130631265116600 Content-Type: text/plain; charset="utf-8" Adds an UNMAP primitive to make use of vcpu_unmap_xsave_area() when linked into xen. unmap is a no-op during tests. Signed-off-by: Alejandro Vallejo --- xen/arch/x86/x86_emulate/blk.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/x86_emulate/blk.c b/xen/arch/x86/x86_emulate/blk.c index 08a05f8453f7..d5b59333823f 100644 --- a/xen/arch/x86/x86_emulate/blk.c +++ b/xen/arch/x86/x86_emulate/blk.c @@ -11,9 +11,11 @@ !defined(X86EMUL_NO_SIMD) # ifdef __XEN__ # include -# define FXSAVE_AREA ((void *)¤t->arch.xsave_area->fpu_sse) +# define FXSAVE_AREA ((void *)vcpu_map_xsave_area(current)) +# define UNMAP_FXSAVE_AREA(x) vcpu_unmap_xsave_area(currt ent, x) # else # define FXSAVE_AREA get_fpu_save_area() +# define UNMAP_FXSAVE_AREA(x) ((void)x) # endif #endif =20 @@ -292,6 +294,9 @@ int x86_emul_blk( } else asm volatile ( "fxrstor %0" :: "m" (*fxsr) ); + + UNMAP_FXSAVE_AREA(fxsr); + break; } =20 @@ -320,6 +325,9 @@ int x86_emul_blk( =20 if ( fxsr !=3D ptr ) /* i.e. s->op_bytes < sizeof(*fxsr) */ memcpy(ptr, fxsr, s->op_bytes); + + UNMAP_FXSAVE_AREA(fxsr); + break; } =20 --=20 2.47.0