From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Juergen Gross <jgross@suse.com>,
xen-devel@lists.xenproject.org, x86@kernel.org,
linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 1/3] xen/pv: allow pmu msr accesses to cause GP
Date: Mon, 26 Sep 2022 16:09:15 -0400 [thread overview]
Message-ID: <b9c7a953-dbfa-164f-7a18-1e230c70e124@oracle.com> (raw)
In-Reply-To: <20220926141849.21805-2-jgross@suse.com>
On 9/26/22 10:18 AM, Juergen Gross wrote:
> bool pmu_msr_read(unsigned int msr, uint64_t *val, int *err)
> {
> if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) {
> - if (is_amd_pmu_msr(msr)) {
> - if (!xen_amd_pmu_emulate(msr, val, 1))
> - *val = native_read_msr_safe(msr, err);
> - return true;
> + if (!is_amd_pmu_msr(msr))
You should be able to move vendor check inside is_<vendor>_pmu_msr().
-boris
> + return false;
> + if (!xen_amd_pmu_emulate(msr, val, 1)) {
> + *val = err ? native_read_msr_safe(msr, err)
> + : native_read_msr(msr);
> }
> + return true;
> } else {
next prev parent reply other threads:[~2022-09-26 20:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 14:18 [PATCH 0/3] xen/pv: sanitize xen pv guest msr accesses Juergen Gross
2022-09-26 14:18 ` [PATCH 1/3] xen/pv: allow pmu msr accesses to cause GP Juergen Gross
2022-09-26 15:29 ` Jan Beulich
2022-09-26 15:33 ` Juergen Gross
2022-09-26 20:09 ` Boris Ostrovsky [this message]
2022-09-27 5:42 ` Juergen Gross
2022-09-26 14:18 ` [PATCH 2/3] xen/pv: refactor msr access functions to support safe and unsafe accesses Juergen Gross
2022-09-26 14:18 ` [PATCH 3/3] xen/pv: support selecting safe/unsafe msr accesses Juergen Gross
2022-09-26 15:23 ` Jan Beulich
2022-09-26 15:36 ` Juergen Gross
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